HEADER    HYDROLASE                               04-OCT-04   1XMY              
TITLE     CATALYTIC DOMAIN OF HUMAN PHOSPHODIESTERASE 4B IN COMPLEX WITH (R)-   
TITLE    2 ROLIPRAM                                                             
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: CAMP-SPECIFIC 3',5'-CYCLIC PHOSPHODIESTERASE 4B;           
COMPND   3 CHAIN: A;                                                            
COMPND   4 FRAGMENT: CATALYTIC DOMAIN OF HUMAN PHOSPHODIESTERASE 4B;            
COMPND   5 SYNONYM: DPDE4, PDE32;                                               
COMPND   6 EC: 3.1.4.17;                                                        
COMPND   7 ENGINEERED: YES;                                                     
COMPND   8 MOL_ID: 2;                                                           
COMPND   9 MOLECULE: CAMP-SPECIFIC 3',5'-CYCLIC PHOSPHODIESTERASE 4B;           
COMPND  10 CHAIN: B;                                                            
COMPND  11 FRAGMENT: CATALYTIC DOMAIN OF HUMAN PHOSPHODIESTERASE 4B;            
COMPND  12 SYNONYM: DPDE4, PDE32;                                               
COMPND  13 EC: 3.1.4.17;                                                        
COMPND  14 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 GENE: PDE4B;                                                         
SOURCE   6 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   7 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   8 EXPRESSION_SYSTEM_STRAIN: BL21(DE3)CODON PLUS(RIL);                  
SOURCE   9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE  10 EXPRESSION_SYSTEM_PLASMID: PET15B;                                   
SOURCE  11 MOL_ID: 2;                                                           
SOURCE  12 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE  13 ORGANISM_COMMON: HUMAN;                                              
SOURCE  14 ORGANISM_TAXID: 9606;                                                
SOURCE  15 GENE: PDE4B;                                                         
SOURCE  16 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE  17 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE  18 EXPRESSION_SYSTEM_STRAIN: BL21(DE3)CODON PLUS(RIL);                  
SOURCE  19 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE  20 EXPRESSION_SYSTEM_PLASMID: PET15B                                    
KEYWDS    PHOSPHODIESTERASE, PDE, PDE4B, ROLIPRAM, (R)-ROLIPRAM, HYDROLASE      
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    G.L.CARD,B.P.ENGLAND,Y.SUZUKI,D.FONG,B.POWELL,B.LEE,C.LUU,            
AUTHOR   2 M.TABRIZIZAD,S.GILLETTE,P.N.IBRAHIM,D.R.ARTIS,G.BOLLAG,M.V.MILBURN,  
AUTHOR   3 S.-H.KIM,J.SCHLESSINGER,K.Y.J.ZHANG                                  
REVDAT   4   20-NOV-24 1XMY    1       REMARK SEQADV LINK                       
REVDAT   3   13-JUL-11 1XMY    1       VERSN                                    
REVDAT   2   24-FEB-09 1XMY    1       VERSN                                    
REVDAT   1   14-DEC-04 1XMY    0                                                
JRNL        AUTH   G.L.CARD,B.P.ENGLAND,Y.SUZUKI,D.FONG,B.POWELL,B.LEE,C.LUU,   
JRNL        AUTH 2 M.TABRIZIZAD,S.GILLETTE,P.N.IBRAHIM,D.R.ARTIS,G.BOLLAG,      
JRNL        AUTH 3 M.V.MILBURN,S.-H.KIM,J.SCHLESSINGER,K.Y.J.ZHANG              
JRNL        TITL   STRUCTURAL BASIS FOR THE ACTIVITY OF DRUGS THAT INHIBIT      
JRNL        TITL 2 PHOSPHODIESTERASES.                                          
JRNL        REF    STRUCTURE                     V.  12  2233 2004              
JRNL        REFN                   ISSN 0969-2126                               
JRNL        PMID   15576036                                                     
JRNL        DOI    10.1016/J.STR.2004.10.004                                    
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.40 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.1.25                                        
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,              
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                             
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : MAXIMUM LIKELIHOOD                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.40                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 70.71                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : NULL                           
REMARK   3   COMPLETENESS FOR RANGE        (%) : 99.2                           
REMARK   3   NUMBER OF REFLECTIONS             : 34006                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : THROUGHOUT                      
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE     (WORKING + TEST SET) : 0.245                           
REMARK   3   R VALUE            (WORKING SET) : 0.243                           
REMARK   3   FREE R VALUE                     : 0.298                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1792                            
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 20                           
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.40                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.46                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 2475                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2940                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 116                          
REMARK   3   BIN FREE R VALUE                    : 0.3290                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 5226                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 44                                      
REMARK   3   SOLVENT ATOMS            : 61                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   B VALUE TYPE : LIKELY RESIDUAL                                     
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 22.28                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -3.59000                                             
REMARK   3    B22 (A**2) : -1.87000                                             
REMARK   3    B33 (A**2) : 5.46000                                              
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.385         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.289         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.229         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 9.960         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.941                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.918                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  5380 ; 0.025 ; 0.021       
REMARK   3   BOND LENGTHS OTHERS               (A):  4780 ; 0.002 ; 0.020       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  7298 ; 2.040 ; 1.947       
REMARK   3   BOND ANGLES OTHERS          (DEGREES): 11138 ; 1.055 ; 3.000       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   644 ; 3.999 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   828 ; 0.119 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  5918 ; 0.009 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):  1048 ; 0.008 ; 0.020       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):  1333 ; 0.233 ; 0.200       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  5409 ; 0.233 ; 0.200       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  2968 ; 0.096 ; 0.200       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):   142 ; 0.176 ; 0.200       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):     6 ; 0.162 ; 0.200       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):     4 ; 0.411 ; 0.200       
REMARK   3   SYMMETRY VDW OTHERS               (A):    29 ; 0.256 ; 0.200       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):     2 ; 0.235 ; 0.200       
REMARK   3   SYMMETRY H-BOND OTHERS            (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.     COUNT   RMS    WEIGHT      
REMARK   3   MAIN-CHAIN BOND REFINED ATOMS  (A**2):  3228 ; 0.832 ; 1.500       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  5236 ; 1.448 ; 2.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  2152 ; 2.491 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  2062 ; 3.714 ; 4.500       
REMARK   3   SIDE-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B REFINED ATOMS     (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B OTHER ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3 ANISOTROPIC THERMAL FACTOR RESTRAINTS.    COUNT   RMS   WEIGHT       
REMARK   3   RIGID-BOND RESTRAINTS          (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; FREE ATOMS         (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; BONDED ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS STATISTICS                                           
REMARK   3   NUMBER OF DIFFERENT NCS GROUPS : NULL                              
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : 2                                          
REMARK   3                                                                      
REMARK   3   TLS GROUP : 1                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 3                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   A   163        A   193                          
REMARK   3    RESIDUE RANGE :   A   195        A   319                          
REMARK   3    RESIDUE RANGE :   A   321        A   485                          
REMARK   3    ORIGIN FOR THE GROUP (A):  42.6441   2.4313  51.5135              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.2234 T22:   0.1596                                     
REMARK   3      T33:   0.0763 T12:  -0.0121                                     
REMARK   3      T13:   0.0152 T23:   0.0446                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   3.8896 L22:   1.6690                                     
REMARK   3      L33:   3.2527 L12:  -0.5311                                     
REMARK   3      L13:  -0.6768 L23:   0.1113                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:  -0.0952 S12:   0.0007 S13:  -0.1758                       
REMARK   3      S21:  -0.1391 S22:   0.0064 S23:  -0.0312                       
REMARK   3      S31:  -0.0214 S32:   0.2258 S33:   0.0888                       
REMARK   3                                                                      
REMARK   3   TLS GROUP : 2                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 3                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   B   163        B   193                          
REMARK   3    RESIDUE RANGE :   B   195        B   431                          
REMARK   3    RESIDUE RANGE :   B   433        B   485                          
REMARK   3    ORIGIN FOR THE GROUP (A):   2.3298   2.3632  52.4779              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.2331 T22:   0.2017                                     
REMARK   3      T33:   0.0102 T12:   0.0200                                     
REMARK   3      T13:   0.0267 T23:   0.0248                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   3.6394 L22:   1.7599                                     
REMARK   3      L33:   3.0833 L12:   0.0664                                     
REMARK   3      L13:  -0.2888 L23:  -0.0251                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:  -0.1193 S12:   0.0986 S13:  -0.3035                       
REMARK   3      S21:   0.1763 S22:  -0.0010 S23:   0.0948                       
REMARK   3      S31:   0.0397 S32:  -0.1872 S33:   0.1203                       
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED : BABINET MODEL WITH MASK                              
REMARK   3   PARAMETERS FOR MASK CALCULATION                                    
REMARK   3   VDW PROBE RADIUS   : 1.40                                          
REMARK   3   ION PROBE RADIUS   : 0.80                                          
REMARK   3   SHRINKAGE RADIUS   : 0.80                                          
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN ADDED IN THE RIDING   
REMARK   3  POSITIONS                                                           
REMARK   4                                                                      
REMARK   4 1XMY COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 16-NOV-04.                  
REMARK 100 THE DEPOSITION ID IS D_1000030532.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 20-JUL-04                          
REMARK 200  TEMPERATURE           (KELVIN) : 93                                 
REMARK 200  PH                             : 10.0                               
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : ALS                                
REMARK 200  BEAMLINE                       : 8.3.1                              
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.1                                
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 210                   
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : BLU-ICE                            
REMARK 200  DATA SCALING SOFTWARE          : ELVES                              
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 34006                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.400                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 70.710                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.2                               
REMARK 200  DATA REDUNDANCY                : 4.100                              
REMARK 200  R MERGE                    (I) : 0.09600                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 4.7000                             
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.40                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.46                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 99.2                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 3.70                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 0.759                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: EPMR                                                  
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 50.08                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.46                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: AMMONIUM SULFATE AND LITHIUM SULFATE,    
REMARK 280  PH 10.0, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 277.0K          
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 21                       
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X+1/2,-Y,Z+1/2                                         
REMARK 290       3555   -X,Y+1/2,-Z+1/2                                         
REMARK 290       4555   X+1/2,-Y+1/2,-Z                                         
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000       44.83500            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       53.21600            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       47.31650            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       53.21600            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       44.83500            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       47.31650            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1, 2                                                    
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 300 REMARK: THE BIOLOGICAL ASSEMBLY IS ONE MONOMER.                      
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A                                     
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 2                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
REMARK 350 APPLY THE FOLLOWING TO CHAINS: B                                     
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 465                                                                      
REMARK 465 MISSING RESIDUES                                                     
REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE                       
REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.)                
REMARK 465                                                                      
REMARK 465   M RES C SSSEQI                                                     
REMARK 465     MET A   131                                                      
REMARK 465     GLY A   132                                                      
REMARK 465     SER A   133                                                      
REMARK 465     SER A   134                                                      
REMARK 465     HIS A   135                                                      
REMARK 465     HIS A   136                                                      
REMARK 465     HIS A   137                                                      
REMARK 465     HIS A   138                                                      
REMARK 465     HIS A   139                                                      
REMARK 465     HIS A   140                                                      
REMARK 465     SER A   141                                                      
REMARK 465     SER A   142                                                      
REMARK 465     GLY A   143                                                      
REMARK 465     LEU A   144                                                      
REMARK 465     VAL A   145                                                      
REMARK 465     PRO A   146                                                      
REMARK 465     ARG A   147                                                      
REMARK 465     GLY A   148                                                      
REMARK 465     SER A   149                                                      
REMARK 465     HIS A   150                                                      
REMARK 465     MET A   151                                                      
REMARK 465     SER A   152                                                      
REMARK 465     ILE A   153                                                      
REMARK 465     SER A   154                                                      
REMARK 465     ARG A   155                                                      
REMARK 465     PHE A   156                                                      
REMARK 465     GLY A   157                                                      
REMARK 465     VAL A   158                                                      
REMARK 465     ASN A   159                                                      
REMARK 465     THR A   160                                                      
REMARK 465     GLU A   161                                                      
REMARK 465     ASN A   162                                                      
REMARK 465     GLN A   486                                                      
REMARK 465     SER A   487                                                      
REMARK 465     PRO A   488                                                      
REMARK 465     SER A   489                                                      
REMARK 465     PRO A   490                                                      
REMARK 465     PRO A   491                                                      
REMARK 465     LEU A   492                                                      
REMARK 465     ASP A   493                                                      
REMARK 465     GLU A   494                                                      
REMARK 465     GLN A   495                                                      
REMARK 465     ASN A   496                                                      
REMARK 465     ARG A   497                                                      
REMARK 465     ASP A   498                                                      
REMARK 465     CYS A   499                                                      
REMARK 465     GLN A   500                                                      
REMARK 465     GLY A   501                                                      
REMARK 465     LEU A   502                                                      
REMARK 465     MET A   503                                                      
REMARK 465     GLU A   504                                                      
REMARK 465     LYS A   505                                                      
REMARK 465     PHE A   506                                                      
REMARK 465     GLN A   507                                                      
REMARK 465     PHE A   508                                                      
REMARK 465     GLU A   509                                                      
REMARK 465     LEU A   510                                                      
REMARK 465     THR A   511                                                      
REMARK 465     LEU A   512                                                      
REMARK 465     ASP A   513                                                      
REMARK 465     GLU A   514                                                      
REMARK 465     GLU A   515                                                      
REMARK 465     ASP A   516                                                      
REMARK 465     SER A   517                                                      
REMARK 465     GLU A   518                                                      
REMARK 465     GLY A   519                                                      
REMARK 465     PRO A   520                                                      
REMARK 465     GLU A   521                                                      
REMARK 465     LYS A   522                                                      
REMARK 465     GLU A   523                                                      
REMARK 465     GLY A   524                                                      
REMARK 465     GLU A   525                                                      
REMARK 465     GLY A   526                                                      
REMARK 465     HIS A   527                                                      
REMARK 465     SER A   528                                                      
REMARK 465     MET B   131                                                      
REMARK 465     GLY B   132                                                      
REMARK 465     SER B   133                                                      
REMARK 465     SER B   134                                                      
REMARK 465     HIS B   135                                                      
REMARK 465     HIS B   136                                                      
REMARK 465     HIS B   137                                                      
REMARK 465     HIS B   138                                                      
REMARK 465     HIS B   139                                                      
REMARK 465     HIS B   140                                                      
REMARK 465     SER B   141                                                      
REMARK 465     SER B   142                                                      
REMARK 465     GLY B   143                                                      
REMARK 465     LEU B   144                                                      
REMARK 465     VAL B   145                                                      
REMARK 465     PRO B   146                                                      
REMARK 465     ARG B   147                                                      
REMARK 465     GLY B   148                                                      
REMARK 465     SER B   149                                                      
REMARK 465     HIS B   150                                                      
REMARK 465     MET B   151                                                      
REMARK 465     SER B   152                                                      
REMARK 465     ILE B   153                                                      
REMARK 465     SER B   154                                                      
REMARK 465     ARG B   155                                                      
REMARK 465     PHE B   156                                                      
REMARK 465     GLY B   157                                                      
REMARK 465     VAL B   158                                                      
REMARK 465     ASN B   159                                                      
REMARK 465     THR B   160                                                      
REMARK 465     GLU B   161                                                      
REMARK 465     ASN B   162                                                      
REMARK 465     GLN B   486                                                      
REMARK 465     SER B   487                                                      
REMARK 465     PRO B   488                                                      
REMARK 465     SER B   489                                                      
REMARK 465     PRO B   490                                                      
REMARK 465     PRO B   491                                                      
REMARK 465     LEU B   492                                                      
REMARK 465     ASP B   493                                                      
REMARK 465     GLU B   494                                                      
REMARK 465     GLN B   495                                                      
REMARK 465     ASN B   496                                                      
REMARK 465     ARG B   497                                                      
REMARK 465     ASP B   498                                                      
REMARK 465     CYS B   499                                                      
REMARK 465     GLN B   500                                                      
REMARK 465     GLY B   501                                                      
REMARK 465     LEU B   502                                                      
REMARK 465     MET B   503                                                      
REMARK 465     GLU B   504                                                      
REMARK 465     LYS B   505                                                      
REMARK 465     PHE B   506                                                      
REMARK 465     GLN B   507                                                      
REMARK 465     PHE B   508                                                      
REMARK 465     GLU B   509                                                      
REMARK 465     LEU B   510                                                      
REMARK 465     THR B   511                                                      
REMARK 465     LEU B   512                                                      
REMARK 465     ASP B   513                                                      
REMARK 465     GLU B   514                                                      
REMARK 465     GLU B   515                                                      
REMARK 465     ASP B   516                                                      
REMARK 465     SER B   517                                                      
REMARK 465     GLU B   518                                                      
REMARK 465     GLY B   519                                                      
REMARK 465     PRO B   520                                                      
REMARK 465     GLU B   521                                                      
REMARK 465     LYS B   522                                                      
REMARK 465     GLU B   523                                                      
REMARK 465     GLY B   524                                                      
REMARK 465     GLU B   525                                                      
REMARK 465     GLY B   526                                                      
REMARK 465     HIS B   527                                                      
REMARK 465     SER B   528                                                      
REMARK 470                                                                      
REMARK 470 MISSING ATOM                                                         
REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER;           
REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 470 I=INSERTION CODE):                                                   
REMARK 470   M RES CSSEQI  ATOMS                                                
REMARK 470     CME A 194    SD   CE   CZ   OH                                   
REMARK 470     CME A 320    SD   CE   CZ   OH                                   
REMARK 470     CME B 194    SD   CE   CZ   OH                                   
REMARK 470     CME B 432    SD   CE   CZ   OH                                   
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS                                      
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3)               
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   RES CSSEQI ATM2   DEVIATION                     
REMARK 500    PHE B 414   CZ    PHE B 414   CE2     0.121                       
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    ASP A 214   CB  -  CG  -  OD2 ANGL. DEV. =   5.8 DEGREES          
REMARK 500    ASP A 261   CB  -  CG  -  OD2 ANGL. DEV. =   5.7 DEGREES          
REMARK 500    ASP A 277   CB  -  CG  -  OD2 ANGL. DEV. =   5.7 DEGREES          
REMARK 500    ASP A 299   CB  -  CG  -  OD2 ANGL. DEV. =   6.0 DEGREES          
REMARK 500    ASP A 346   CB  -  CG  -  OD1 ANGL. DEV. =   6.2 DEGREES          
REMARK 500    CYS A 390   CA  -  CB  -  SG  ANGL. DEV. =   6.9 DEGREES          
REMARK 500    ASP A 392   CB  -  CG  -  OD2 ANGL. DEV. =   9.9 DEGREES          
REMARK 500    ASP A 433   CB  -  CG  -  OD2 ANGL. DEV. =   6.1 DEGREES          
REMARK 500    ASP A 468   CB  -  CG  -  OD2 ANGL. DEV. =   6.2 DEGREES          
REMARK 500    ARG B 190   NE  -  CZ  -  NH1 ANGL. DEV. =   3.4 DEGREES          
REMARK 500    ARG B 203   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.3 DEGREES          
REMARK 500    ARG B 210   NE  -  CZ  -  NH2 ANGL. DEV. =   3.2 DEGREES          
REMARK 500    MET B 220   CG  -  SD  -  CE  ANGL. DEV. = -10.5 DEGREES          
REMARK 500    LEU B 237   CB  -  CG  -  CD2 ANGL. DEV. = -10.7 DEGREES          
REMARK 500    ASP B 261   CB  -  CG  -  OD2 ANGL. DEV. =   5.8 DEGREES          
REMARK 500    ASP B 379   CB  -  CG  -  OD2 ANGL. DEV. =   5.9 DEGREES          
REMARK 500    ASP B 433   CB  -  CG  -  OD2 ANGL. DEV. =   7.9 DEGREES          
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: TORSION ANGLES                                             
REMARK 500                                                                      
REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS:            
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2)                    
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI-           
REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400            
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        PSI       PHI                                   
REMARK 500    LEU A 178      142.41    -39.18                                   
REMARK 500    ARG A 210       54.71     30.92                                   
REMARK 500    HIS A 234       46.99    -86.25                                   
REMARK 500    ASP A 275       21.46   -140.61                                   
REMARK 500    HIS A 319        1.01    -63.64                                   
REMARK 500    ASP A 375      -86.06    -32.55                                   
REMARK 500    THR A 436      -11.32   -142.08                                   
REMARK 500    ILE A 450      -52.59   -126.90                                   
REMARK 500    ARG B 210       70.07     32.38                                   
REMARK 500    HIS B 274      -19.22    -48.03                                   
REMARK 500    SER B 291      177.96    -44.76                                   
REMARK 500    ASP B 299        4.09     58.66                                   
REMARK 500    SER B 301       55.57     37.30                                   
REMARK 500    ASP B 375      -70.09    -24.39                                   
REMARK 500    ASN B 376     -148.78   -158.31                                   
REMARK 500    LEU B 393       46.64   -104.18                                   
REMARK 500    PRO B 430      -17.02    -46.27                                   
REMARK 500    ILE B 450      -59.15   -129.08                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 600                                                                      
REMARK 600 HETEROGEN                                                            
REMARK 600 HOH 1003-1009 ARE ASSOCIATED WITH CHAIN A.                           
REMARK 600 HOH 2003-20010  ARE ASSOCIATED WITH CHAIN B.                         
REMARK 620                                                                      
REMARK 620 METAL COORDINATION                                                   
REMARK 620 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 620 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE):                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              ZN A1001  ZN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HIS A 238   NE2                                                    
REMARK 620 2 HIS A 274   NE2 103.0                                              
REMARK 620 3 ASP A 275   OD2 101.3  86.0                                        
REMARK 620 4 ASP A 392   OD2  88.8  91.3 169.8                                  
REMARK 620 5 HOH A1007   O   171.1  84.4  73.9  96.0                            
REMARK 620 6 HOH A1008   O    83.4 173.6  93.3  88.3  89.3                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG A1002  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP A 275   OD2                                                    
REMARK 620 2 ASP A 275   OD1  48.6                                              
REMARK 620 3 HOH A1003   O   126.2  92.2                                        
REMARK 620 4 HOH A1004   O   109.9  83.6  97.7                                  
REMARK 620 5 HOH A1005   O   156.6 154.5  67.1  84.5                            
REMARK 620 6 HOH A1006   O    82.7 101.3  69.3 166.0  85.7                      
REMARK 620 7 HOH A1007   O    52.8  95.6 163.3  97.8 108.4  94.7                
REMARK 620 N                    1     2     3     4     5     6                 
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              ZN B1001  ZN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HIS B 238   NE2                                                    
REMARK 620 2 HIS B 274   NE2  87.9                                              
REMARK 620 3 ASP B 275   OD2  92.8  81.9                                        
REMARK 620 4 ASP B 392   OD2  84.6  91.1 172.6                                  
REMARK 620 5 HOH B2007   O   176.3  95.8  87.7  95.4                            
REMARK 620 6 HOH B2008   O    91.7 178.4  99.7  87.3  84.6                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG B1002  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP B 275   OD1                                                    
REMARK 620 2 HOH B2003   O    97.7                                              
REMARK 620 3 HOH B2004   O    77.9  90.9                                        
REMARK 620 4 HOH B2005   O   154.7  79.3  77.0                                  
REMARK 620 5 HOH B2006   O   107.0  83.7 173.1  97.7                            
REMARK 620 6 HOH B2007   O    82.1 177.6  86.7  99.9  98.7                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 1001                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG A 1002                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN B 1001                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG B 1002                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ROL A 101                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ROL B 102                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1XLX   RELATED DB: PDB                                   
REMARK 900 PDE4B IN COMPLEX WITH CILOMILAST                                     
REMARK 900 RELATED ID: 1XLZ   RELATED DB: PDB                                   
REMARK 900 PDE4B IN COMPLEX WITH FILAMINAST                                     
REMARK 900 RELATED ID: 1XM4   RELATED DB: PDB                                   
REMARK 900 PDE4B IN COMPLEX WITH PICLAMILAST                                    
REMARK 900 RELATED ID: 1XM6   RELATED DB: PDB                                   
REMARK 900 PDE4B IN COMPLEX WITH (R)-MESOPRAM                                   
REMARK 900 RELATED ID: 1XMU   RELATED DB: PDB                                   
REMARK 900 PDE4B IN COMPLEX WITH ROFLUMILAST                                    
REMARK 900 RELATED ID: 1XN0   RELATED DB: PDB                                   
REMARK 900 PDE4B IN COMPLEX WITH (R,S)-ROLIPRAM                                 
REMARK 900 RELATED ID: 1XOM   RELATED DB: PDB                                   
REMARK 900 PDE4D IN COMPLEX WITH CILOMILAST                                     
REMARK 900 RELATED ID: 1XON   RELATED DB: PDB                                   
REMARK 900 PDE4D IN COMPLEX WITH PICLAMILAST                                    
REMARK 900 RELATED ID: 1XOQ   RELATED DB: PDB                                   
REMARK 900 PDE4D IN COMPLEX WITH ROFLUMILAST                                    
REMARK 900 RELATED ID: 1XOR   RELATED DB: PDB                                   
REMARK 900 PDE4D IN COMPLEX WITH ZARDAVERINE                                    
REMARK 900 RELATED ID: 1XOS   RELATED DB: PDB                                   
REMARK 900 PDE4B IN COMPLEX WITH SILDENAFIL                                     
REMARK 900 RELATED ID: 1XOT   RELATED DB: PDB                                   
REMARK 900 PDE4B IN COMPLEX WITH VARDENAFIL                                     
REMARK 900 RELATED ID: 1XOZ   RELATED DB: PDB                                   
REMARK 900 PDE5A IN COMPLEX WITH TADALAFIL                                      
REMARK 900 RELATED ID: 1XP0   RELATED DB: PDB                                   
REMARK 900 PDE5A IN COMPLEX WITH VARDENAFIL                                     
DBREF  1XMY A  152   528  UNP    Q07343   PDE4B_HUMAN    324    700             
DBREF  1XMY B  152   528  UNP    Q07343   PDE4B_HUMAN    324    700             
SEQADV 1XMY MET A  131  UNP  Q07343              INITIATING METHIONINE          
SEQADV 1XMY GLY A  132  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY SER A  133  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY SER A  134  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY HIS A  135  UNP  Q07343              EXPRESSION TAG                 
SEQADV 1XMY HIS A  136  UNP  Q07343              EXPRESSION TAG                 
SEQADV 1XMY HIS A  137  UNP  Q07343              EXPRESSION TAG                 
SEQADV 1XMY HIS A  138  UNP  Q07343              EXPRESSION TAG                 
SEQADV 1XMY HIS A  139  UNP  Q07343              EXPRESSION TAG                 
SEQADV 1XMY HIS A  140  UNP  Q07343              EXPRESSION TAG                 
SEQADV 1XMY SER A  141  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY SER A  142  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY GLY A  143  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY LEU A  144  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY VAL A  145  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY PRO A  146  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY ARG A  147  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY GLY A  148  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY SER A  149  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY HIS A  150  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY MET A  151  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY CME A  194  UNP  Q07343    CYS   366 MODIFIED RESIDUE               
SEQADV 1XMY CME A  320  UNP  Q07343    CYS   492 MODIFIED RESIDUE               
SEQADV 1XMY MET B  131  UNP  Q07343              INITIATING METHIONINE          
SEQADV 1XMY GLY B  132  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY SER B  133  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY SER B  134  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY HIS B  135  UNP  Q07343              EXPRESSION TAG                 
SEQADV 1XMY HIS B  136  UNP  Q07343              EXPRESSION TAG                 
SEQADV 1XMY HIS B  137  UNP  Q07343              EXPRESSION TAG                 
SEQADV 1XMY HIS B  138  UNP  Q07343              EXPRESSION TAG                 
SEQADV 1XMY HIS B  139  UNP  Q07343              EXPRESSION TAG                 
SEQADV 1XMY HIS B  140  UNP  Q07343              EXPRESSION TAG                 
SEQADV 1XMY SER B  141  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY SER B  142  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY GLY B  143  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY LEU B  144  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY VAL B  145  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY PRO B  146  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY ARG B  147  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY GLY B  148  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY SER B  149  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY HIS B  150  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY MET B  151  UNP  Q07343              CLONING ARTIFACT               
SEQADV 1XMY CME B  194  UNP  Q07343    CYS   366 MODIFIED RESIDUE               
SEQADV 1XMY CME B  432  UNP  Q07343    CYS   604 MODIFIED RESIDUE               
SEQRES   1 A  398  MET GLY SER SER HIS HIS HIS HIS HIS HIS SER SER GLY          
SEQRES   2 A  398  LEU VAL PRO ARG GLY SER HIS MET SER ILE SER ARG PHE          
SEQRES   3 A  398  GLY VAL ASN THR GLU ASN GLU ASP HIS LEU ALA LYS GLU          
SEQRES   4 A  398  LEU GLU ASP LEU ASN LYS TRP GLY LEU ASN ILE PHE ASN          
SEQRES   5 A  398  VAL ALA GLY TYR SER HIS ASN ARG PRO LEU THR CME ILE          
SEQRES   6 A  398  MET TYR ALA ILE PHE GLN GLU ARG ASP LEU LEU LYS THR          
SEQRES   7 A  398  PHE ARG ILE SER SER ASP THR PHE ILE THR TYR MET MET          
SEQRES   8 A  398  THR LEU GLU ASP HIS TYR HIS SER ASP VAL ALA TYR HIS          
SEQRES   9 A  398  ASN SER LEU HIS ALA ALA ASP VAL ALA GLN SER THR HIS          
SEQRES  10 A  398  VAL LEU LEU SER THR PRO ALA LEU ASP ALA VAL PHE THR          
SEQRES  11 A  398  ASP LEU GLU ILE LEU ALA ALA ILE PHE ALA ALA ALA ILE          
SEQRES  12 A  398  HIS ASP VAL ASP HIS PRO GLY VAL SER ASN GLN PHE LEU          
SEQRES  13 A  398  ILE ASN THR ASN SER GLU LEU ALA LEU MET TYR ASN ASP          
SEQRES  14 A  398  GLU SER VAL LEU GLU ASN HIS HIS LEU ALA VAL GLY PHE          
SEQRES  15 A  398  LYS LEU LEU GLN GLU GLU HIS CME ASP ILE PHE MET ASN          
SEQRES  16 A  398  LEU THR LYS LYS GLN ARG GLN THR LEU ARG LYS MET VAL          
SEQRES  17 A  398  ILE ASP MET VAL LEU ALA THR ASP MET SER LYS HIS MET          
SEQRES  18 A  398  SER LEU LEU ALA ASP LEU LYS THR MET VAL GLU THR LYS          
SEQRES  19 A  398  LYS VAL THR SER SER GLY VAL LEU LEU LEU ASP ASN TYR          
SEQRES  20 A  398  THR ASP ARG ILE GLN VAL LEU ARG ASN MET VAL HIS CYS          
SEQRES  21 A  398  ALA ASP LEU SER ASN PRO THR LYS SER LEU GLU LEU TYR          
SEQRES  22 A  398  ARG GLN TRP THR ASP ARG ILE MET GLU GLU PHE PHE GLN          
SEQRES  23 A  398  GLN GLY ASP LYS GLU ARG GLU ARG GLY MET GLU ILE SER          
SEQRES  24 A  398  PRO MET CYS ASP LYS HIS THR ALA SER VAL GLU LYS SER          
SEQRES  25 A  398  GLN VAL GLY PHE ILE ASP TYR ILE VAL HIS PRO LEU TRP          
SEQRES  26 A  398  GLU THR TRP ALA ASP LEU VAL GLN PRO ASP ALA GLN ASP          
SEQRES  27 A  398  ILE LEU ASP THR LEU GLU ASP ASN ARG ASN TRP TYR GLN          
SEQRES  28 A  398  SER MET ILE PRO GLN SER PRO SER PRO PRO LEU ASP GLU          
SEQRES  29 A  398  GLN ASN ARG ASP CYS GLN GLY LEU MET GLU LYS PHE GLN          
SEQRES  30 A  398  PHE GLU LEU THR LEU ASP GLU GLU ASP SER GLU GLY PRO          
SEQRES  31 A  398  GLU LYS GLU GLY GLU GLY HIS SER                              
SEQRES   1 B  398  MET GLY SER SER HIS HIS HIS HIS HIS HIS SER SER GLY          
SEQRES   2 B  398  LEU VAL PRO ARG GLY SER HIS MET SER ILE SER ARG PHE          
SEQRES   3 B  398  GLY VAL ASN THR GLU ASN GLU ASP HIS LEU ALA LYS GLU          
SEQRES   4 B  398  LEU GLU ASP LEU ASN LYS TRP GLY LEU ASN ILE PHE ASN          
SEQRES   5 B  398  VAL ALA GLY TYR SER HIS ASN ARG PRO LEU THR CME ILE          
SEQRES   6 B  398  MET TYR ALA ILE PHE GLN GLU ARG ASP LEU LEU LYS THR          
SEQRES   7 B  398  PHE ARG ILE SER SER ASP THR PHE ILE THR TYR MET MET          
SEQRES   8 B  398  THR LEU GLU ASP HIS TYR HIS SER ASP VAL ALA TYR HIS          
SEQRES   9 B  398  ASN SER LEU HIS ALA ALA ASP VAL ALA GLN SER THR HIS          
SEQRES  10 B  398  VAL LEU LEU SER THR PRO ALA LEU ASP ALA VAL PHE THR          
SEQRES  11 B  398  ASP LEU GLU ILE LEU ALA ALA ILE PHE ALA ALA ALA ILE          
SEQRES  12 B  398  HIS ASP VAL ASP HIS PRO GLY VAL SER ASN GLN PHE LEU          
SEQRES  13 B  398  ILE ASN THR ASN SER GLU LEU ALA LEU MET TYR ASN ASP          
SEQRES  14 B  398  GLU SER VAL LEU GLU ASN HIS HIS LEU ALA VAL GLY PHE          
SEQRES  15 B  398  LYS LEU LEU GLN GLU GLU HIS CYS ASP ILE PHE MET ASN          
SEQRES  16 B  398  LEU THR LYS LYS GLN ARG GLN THR LEU ARG LYS MET VAL          
SEQRES  17 B  398  ILE ASP MET VAL LEU ALA THR ASP MET SER LYS HIS MET          
SEQRES  18 B  398  SER LEU LEU ALA ASP LEU LYS THR MET VAL GLU THR LYS          
SEQRES  19 B  398  LYS VAL THR SER SER GLY VAL LEU LEU LEU ASP ASN TYR          
SEQRES  20 B  398  THR ASP ARG ILE GLN VAL LEU ARG ASN MET VAL HIS CYS          
SEQRES  21 B  398  ALA ASP LEU SER ASN PRO THR LYS SER LEU GLU LEU TYR          
SEQRES  22 B  398  ARG GLN TRP THR ASP ARG ILE MET GLU GLU PHE PHE GLN          
SEQRES  23 B  398  GLN GLY ASP LYS GLU ARG GLU ARG GLY MET GLU ILE SER          
SEQRES  24 B  398  PRO MET CME ASP LYS HIS THR ALA SER VAL GLU LYS SER          
SEQRES  25 B  398  GLN VAL GLY PHE ILE ASP TYR ILE VAL HIS PRO LEU TRP          
SEQRES  26 B  398  GLU THR TRP ALA ASP LEU VAL GLN PRO ASP ALA GLN ASP          
SEQRES  27 B  398  ILE LEU ASP THR LEU GLU ASP ASN ARG ASN TRP TYR GLN          
SEQRES  28 B  398  SER MET ILE PRO GLN SER PRO SER PRO PRO LEU ASP GLU          
SEQRES  29 B  398  GLN ASN ARG ASP CYS GLN GLY LEU MET GLU LYS PHE GLN          
SEQRES  30 B  398  PHE GLU LEU THR LEU ASP GLU GLU ASP SER GLU GLY PRO          
SEQRES  31 B  398  GLU LYS GLU GLY GLU GLY HIS SER                              
MODRES 1XMY CME A  194  CYS  S,S-(2-HYDROXYETHYL)THIOCYSTEINE                   
MODRES 1XMY CME A  320  CYS  S,S-(2-HYDROXYETHYL)THIOCYSTEINE                   
MODRES 1XMY CME B  194  CYS  S,S-(2-HYDROXYETHYL)THIOCYSTEINE                   
MODRES 1XMY CME B  432  CYS  S,S-(2-HYDROXYETHYL)THIOCYSTEINE                   
HET    CME  A 194       6                                                       
HET    CME  A 320       6                                                       
HET    CME  B 194       6                                                       
HET    CME  B 432       6                                                       
HET     ZN  A1001       1                                                       
HET     MG  A1002       1                                                       
HET    ROL  A 101      20                                                       
HET     ZN  B1001       1                                                       
HET     MG  B1002       1                                                       
HET    ROL  B 102      20                                                       
HETNAM     CME S,S-(2-HYDROXYETHYL)THIOCYSTEINE                                 
HETNAM      ZN ZINC ION                                                         
HETNAM      MG MAGNESIUM ION                                                    
HETNAM     ROL ROLIPRAM                                                         
HETSYN     ROL (4R)-[3-(CYCLOPENTYLOXY)-4-METHOXYPHENYL]-2-                     
HETSYN   2 ROL  PYRROLIDINONE                                                   
FORMUL   1  CME    4(C5 H11 N O3 S2)                                            
FORMUL   3   ZN    2(ZN 2+)                                                     
FORMUL   4   MG    2(MG 2+)                                                     
FORMUL   5  ROL    2(C16 H21 N O3)                                              
FORMUL   9  HOH   *61(H2 O)                                                     
HELIX    1   1 GLU A  163  LEU A  170  1                                   8    
HELIX    2   2 GLU A  171  LEU A  173  5                                   3    
HELIX    3   3 ASN A  179  TYR A  186  1                                   8    
HELIX    4   4 ARG A  190  ASP A  204  1                                  15    
HELIX    5   5 ASP A  204  PHE A  209  1                                   6    
HELIX    6   6 SER A  212  ASP A  225  1                                  14    
HELIX    7   7 ASN A  235  LEU A  250  1                                  16    
HELIX    8   8 SER A  251  ASP A  256  5                                   6    
HELIX    9   9 THR A  260  HIS A  274  1                                  15    
HELIX   10  10 SER A  282  THR A  289  1                                   8    
HELIX   11  11 SER A  291  ASN A  298  1                                   8    
HELIX   12  12 SER A  301  LEU A  314  1                                  14    
HELIX   13  13 THR A  327  ALA A  344  1                                  18    
HELIX   14  14 THR A  345  SER A  348  5                                   4    
HELIX   15  15 LYS A  349  THR A  363  1                                  15    
HELIX   16  16 ASN A  376  LEU A  393  1                                  18    
HELIX   17  17 SER A  394  LYS A  398  5                                   5    
HELIX   18  18 SER A  399  ARG A  424  1                                  26    
HELIX   19  19 SER A  429  ASP A  433  5                                   5    
HELIX   20  20 SER A  438  ILE A  450  1                                  13    
HELIX   21  21 ILE A  450  VAL A  462  1                                  13    
HELIX   22  22 ALA A  466  MET A  483  1                                  18    
HELIX   23  23 GLU B  163  LEU B  170  1                                   8    
HELIX   24  24 GLU B  171  LEU B  173  5                                   3    
HELIX   25  25 ASN B  179  TYR B  186  1                                   8    
HELIX   26  26 ARG B  190  ARG B  203  1                                  14    
HELIX   27  27 ASP B  204  PHE B  209  1                                   6    
HELIX   28  28 SER B  212  HIS B  226  1                                  15    
HELIX   29  29 ASN B  235  SER B  251  1                                  17    
HELIX   30  30 THR B  252  ASP B  256  5                                   5    
HELIX   31  31 THR B  260  HIS B  274  1                                  15    
HELIX   32  32 SER B  282  THR B  289  1                                   8    
HELIX   33  33 SER B  291  ASN B  298  1                                   8    
HELIX   34  34 SER B  301  LEU B  314  1                                  14    
HELIX   35  35 LEU B  315  GLN B  316  5                                   2    
HELIX   36  36 GLU B  317  LEU B  326  5                                  10    
HELIX   37  37 THR B  327  ALA B  344  1                                  18    
HELIX   38  38 THR B  345  SER B  348  5                                   4    
HELIX   39  39 LYS B  349  LYS B  364  1                                  16    
HELIX   40  40 ASN B  376  LEU B  393  1                                  18    
HELIX   41  41 SER B  394  LYS B  398  5                                   5    
HELIX   42  42 SER B  399  ARG B  424  1                                  26    
HELIX   43  43 SER B  438  ILE B  450  1                                  13    
HELIX   44  44 ILE B  450  GLN B  463  1                                  14    
HELIX   45  45 ALA B  466  MET B  483  1                                  18    
LINK         C   THR A 193                 N   CME A 194     1555   1555  1.34  
LINK         C   CME A 194                 N   ILE A 195     1555   1555  1.34  
LINK         C   HIS A 319                 N   CME A 320     1555   1555  1.36  
LINK         C   CME A 320                 N   ASP A 321     1555   1555  1.33  
LINK         C   THR B 193                 N   CME B 194     1555   1555  1.35  
LINK         C   CME B 194                 N   ILE B 195     1555   1555  1.34  
LINK         C   MET B 431                 N   CME B 432     1555   1555  1.34  
LINK         C   CME B 432                 N   ASP B 433     1555   1555  1.33  
LINK         NE2 HIS A 238                ZN    ZN A1001     1555   1555  2.41  
LINK         NE2 HIS A 274                ZN    ZN A1001     1555   1555  2.45  
LINK         OD2 ASP A 275                ZN    ZN A1001     1555   1555  2.13  
LINK         OD2 ASP A 275                MG    MG A1002     1555   1555  2.95  
LINK         OD1 ASP A 275                MG    MG A1002     1555   1555  1.95  
LINK         OD2 ASP A 392                ZN    ZN A1001     1555   1555  2.02  
LINK        ZN    ZN A1001                 O   HOH A1007     1555   1555  1.77  
LINK        ZN    ZN A1001                 O   HOH A1008     1555   1555  2.43  
LINK        MG    MG A1002                 O   HOH A1003     1555   1555  1.74  
LINK        MG    MG A1002                 O   HOH A1004     1555   1555  2.13  
LINK        MG    MG A1002                 O   HOH A1005     1555   1555  2.48  
LINK        MG    MG A1002                 O   HOH A1006     1555   1555  2.15  
LINK        MG    MG A1002                 O   HOH A1007     1555   1555  2.03  
LINK         NE2 HIS B 238                ZN    ZN B1001     1555   1555  2.52  
LINK         NE2 HIS B 274                ZN    ZN B1001     1555   1555  2.21  
LINK         OD2 ASP B 275                ZN    ZN B1001     1555   1555  2.12  
LINK         OD1 ASP B 275                MG    MG B1002     1555   1555  2.08  
LINK         OD2 ASP B 392                ZN    ZN B1001     1555   1555  2.05  
LINK        ZN    ZN B1001                 O   HOH B2007     1555   1555  1.85  
LINK        ZN    ZN B1001                 O   HOH B2008     1555   1555  2.42  
LINK        MG    MG B1002                 O   HOH B2003     1555   1555  1.95  
LINK        MG    MG B1002                 O   HOH B2004     1555   1555  2.32  
LINK        MG    MG B1002                 O   HOH B2005     1555   1555  2.14  
LINK        MG    MG B1002                 O   HOH B2006     1555   1555  2.10  
LINK        MG    MG B1002                 O   HOH B2007     1555   1555  2.27  
CISPEP   1 GLN A  463    PRO A  464          0        -2.90                     
CISPEP   2 GLN B  463    PRO B  464          0         3.55                     
SITE     1 AC1  7 HIS A 238  HIS A 274  ASP A 275  ASP A 392                    
SITE     2 AC1  7  MG A1002  HOH A1007  HOH A1008                               
SITE     1 AC2  7 ASP A 275   ZN A1001  HOH A1003  HOH A1004                    
SITE     2 AC2  7 HOH A1005  HOH A1006  HOH A1007                               
SITE     1 AC3  6 HIS B 238  HIS B 274  ASP B 275  ASP B 392                    
SITE     2 AC3  6 HOH B2007  HOH B2008                                          
SITE     1 AC4  6 ASP B 275  HOH B2003  HOH B2004  HOH B2005                    
SITE     2 AC4  6 HOH B2006  HOH B2007                                          
SITE     1 AC5  5 HIS A 234  ASN A 395  MET A 431  GLN A 443                    
SITE     2 AC5  5 PHE A 446                                                     
SITE     1 AC6  8 HOH B  12  TYR B 233  ASN B 395  THR B 407                    
SITE     2 AC6  8 ILE B 410  MET B 431  GLN B 443  PHE B 446                    
CRYST1   89.670   94.633  106.432  90.00  90.00  90.00 P 21 21 21    4          
ORIGX1      1.000000  0.000000  0.000000        0.00000                         
ORIGX2      0.000000  1.000000  0.000000        0.00000                         
ORIGX3      0.000000  0.000000  1.000000        0.00000                         
SCALE1      0.011152  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.010567  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.009396        0.00000