HEADER    HYDROLASE                               18-MAY-04   1T9R              
TITLE     CATALYTIC DOMAIN OF HUMAN PHOSPHODIESTERASE 5A                        
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: CGMP-SPECIFIC 3',5'-CYCLIC PHOSPHODIESTERASE;              
COMPND   3 CHAIN: A;                                                            
COMPND   4 FRAGMENT: CATALYTIC DOMAIN;                                          
COMPND   5 SYNONYM: CGB-PDE, CGMP-BINDING CGMP-SPECIFIC PHOSPHODIESTERASE;      
COMPND   6 EC: 3.1.4.17;                                                        
COMPND   7 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: PDE5A, PDE5;                                                   
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                                    
KEYWDS    HYDROLASE, PDE5A                                                      
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    K.Y.J.ZHANG,G.L.CARD,Y.SUZUKI,D.R.ARTIS,D.FONG,S.GILLETTE,D.HSIEH,    
AUTHOR   2 J.NEIMAN,B.L.WEST,C.ZHANG,M.V.MILBURN,S.-H.KIM,J.SCHLESSINGER,       
AUTHOR   3 G.BOLLAG                                                             
REVDAT   4   14-FEB-24 1T9R    1       REMARK SEQADV LINK                       
REVDAT   3   13-JUL-11 1T9R    1       VERSN                                    
REVDAT   2   24-FEB-09 1T9R    1       VERSN                                    
REVDAT   1   03-AUG-04 1T9R    0                                                
JRNL        AUTH   K.Y.J.ZHANG,G.L.CARD,Y.SUZUKI,D.R.ARTIS,D.FONG,S.GILLETTE,   
JRNL        AUTH 2 D.HSIEH,J.NEIMAN,B.L.WEST,C.ZHANG,M.V.MILBURN,S.-H.KIM,      
JRNL        AUTH 3 J.SCHLESSINGER,G.BOLLAG                                      
JRNL        TITL   A GLUTAMINE SWITCH MECHANISM FOR NUCLEOTIDE SELECTIVITY BY   
JRNL        TITL 2 PHOSPHODIESTERASES                                           
JRNL        REF    MOL.CELL                      V.  15   279 2004              
JRNL        REFN                   ISSN 1097-2765                               
JRNL        PMID   15260978                                                     
JRNL        DOI    10.1016/J.MOLCEL.2004.07.005                                 
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.10 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) : 2.10                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 84.51                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 99.4                           
REMARK   3   NUMBER OF REFLECTIONS             : 23081                          
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) : 0.204                           
REMARK   3   R VALUE            (WORKING SET) : 0.202                           
REMARK   3   FREE R VALUE                     : 0.241                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1227                            
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) : 2.10                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.16                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 1696                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2870                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 84                           
REMARK   3   BIN FREE R VALUE                    : 0.3340                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 2444                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 19                                      
REMARK   3   SOLVENT ATOMS            : 90                                      
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) : 35.54                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -1.29000                                             
REMARK   3    B22 (A**2) : -1.29000                                             
REMARK   3    B33 (A**2) : 1.94000                                              
REMARK   3    B12 (A**2) : -0.65000                                             
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): 0.193         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.172         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.120         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 4.581         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.957                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.945                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  2515 ; 0.014 ; 0.021       
REMARK   3   BOND LENGTHS OTHERS               (A):  2283 ; 0.002 ; 0.020       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  3388 ; 1.421 ; 1.955       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  5331 ; 1.152 ; 3.000       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   298 ; 5.603 ; 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):   382 ; 0.082 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  2726 ; 0.005 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):   490 ; 0.004 ; 0.020       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):   617 ; 0.221 ; 0.200       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  2454 ; 0.229 ; 0.200       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  1491 ; 0.088 ; 0.200       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):    68 ; 0.155 ; 0.200       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):     1 ; 0.295 ; 0.200       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):    41 ; 0.664 ; 0.200       
REMARK   3   SYMMETRY VDW OTHERS               (A):    72 ; 0.412 ; 0.200       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):    15 ; 0.551 ; 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):  1503 ; 0.656 ; 1.500       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  2421 ; 1.278 ; 2.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  1012 ; 2.116 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):   967 ; 3.211 ; 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  : 1                                          
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   534        A   657                          
REMARK   3    RESIDUE RANGE :   A   672        A   789                          
REMARK   3    RESIDUE RANGE :   A   804        A   862                          
REMARK   3    ORIGIN FOR THE GROUP (A):  29.9337   0.5362   7.4916              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.1427 T22:   0.1335                                     
REMARK   3      T33:   0.1003 T12:  -0.0074                                     
REMARK   3      T13:   0.0032 T23:  -0.1157                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   3.8321 L22:   1.8525                                     
REMARK   3      L33:   1.1790 L12:   0.3227                                     
REMARK   3      L13:  -0.3504 L23:   0.0622                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.2974 S12:  -0.0172 S13:   0.1458                       
REMARK   3      S21:  -0.0105 S22:  -0.3002 S23:   0.3822                       
REMARK   3      S31:  -0.0501 S32:  -0.0501 S33:   0.0027                       
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 1T9R COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 26-MAY-04.                  
REMARK 100 THE DEPOSITION ID IS D_1000022489.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 07-DEC-02                          
REMARK 200  TEMPERATURE           (KELVIN) : 93                                 
REMARK 200  PH                             : 4.5                                
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) : 1.0, 1.282927, 1.283302,           
REMARK 200                                   1.169662                           
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   : 23081                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.100                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 84.510                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : -3.000                             
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.4                               
REMARK 200  DATA REDUNDANCY                : 10.90                              
REMARK 200  R MERGE                    (I) : 0.04700                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 8.2000                             
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.10                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.24                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 99.1                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: MAD                                            
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MAD                          
REMARK 200 SOFTWARE USED: CNX                                                   
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 51.14                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.52                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 3000, SODIUM CHLORIDE, SODIUM        
REMARK 280  PHOSPHATE-CITRATE, PH 4.5, VAPOR DIFFUSION, SITTING DROP,           
REMARK 280  TEMPERATURE 277K                                                    
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 62                             
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -Y,X-Y,Z+2/3                                            
REMARK 290       3555   -X+Y,-X,Z+1/3                                           
REMARK 290       4555   -X,-Y,Z                                                 
REMARK 290       5555   Y,-X+Y,Z+2/3                                            
REMARK 290       6555   X-Y,X,Z+1/3                                             
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 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       52.68400            
REMARK 290   SMTRY1   3 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   3 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000       26.34200            
REMARK 290   SMTRY1   4 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   5  0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   5 -0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000       52.68400            
REMARK 290   SMTRY1   6  0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   6  0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       26.34200            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
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 375                                                                      
REMARK 375 SPECIAL POSITION                                                     
REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS            
REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL          
REMARK 375 POSITIONS.                                                           
REMARK 375                                                                      
REMARK 375 ATOM RES CSSEQI                                                      
REMARK 375      HOH A 876  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A 877  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A 933  LIES ON A SPECIAL POSITION.                          
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   510                                                      
REMARK 465     GLY A   511                                                      
REMARK 465     SER A   512                                                      
REMARK 465     SER A   513                                                      
REMARK 465     HIS A   514                                                      
REMARK 465     HIS A   515                                                      
REMARK 465     HIS A   516                                                      
REMARK 465     HIS A   517                                                      
REMARK 465     HIS A   518                                                      
REMARK 465     HIS A   519                                                      
REMARK 465     SER A   520                                                      
REMARK 465     SER A   521                                                      
REMARK 465     GLY A   522                                                      
REMARK 465     LEU A   523                                                      
REMARK 465     VAL A   524                                                      
REMARK 465     PRO A   525                                                      
REMARK 465     ARG A   526                                                      
REMARK 465     GLY A   527                                                      
REMARK 465     SER A   528                                                      
REMARK 465     HIS A   529                                                      
REMARK 465     MET A   530                                                      
REMARK 465     SER A   531                                                      
REMARK 465     ALA A   532                                                      
REMARK 465     ALA A   533                                                      
REMARK 465     ARG A   658                                                      
REMARK 465     GLY A   659                                                      
REMARK 465     VAL A   660                                                      
REMARK 465     ASN A   661                                                      
REMARK 465     ASN A   662                                                      
REMARK 465     SER A   663                                                      
REMARK 465     TYR A   664                                                      
REMARK 465     ILE A   665                                                      
REMARK 465     GLN A   666                                                      
REMARK 465     ARG A   667                                                      
REMARK 465     SER A   668                                                      
REMARK 465     GLU A   669                                                      
REMARK 465     HIS A   670                                                      
REMARK 465     PRO A   671                                                      
REMARK 465     GLY A   790                                                      
REMARK 465     ASP A   791                                                      
REMARK 465     ARG A   792                                                      
REMARK 465     GLU A   793                                                      
REMARK 465     ARG A   794                                                      
REMARK 465     LYS A   795                                                      
REMARK 465     GLU A   796                                                      
REMARK 465     LEU A   797                                                      
REMARK 465     ASN A   798                                                      
REMARK 465     ILE A   799                                                      
REMARK 465     GLU A   800                                                      
REMARK 465     PRO A   801                                                      
REMARK 465     THR A   802                                                      
REMARK 465     ASP A   803                                                      
REMARK 465     MET A   863                                                      
REMARK 465     LEU A   864                                                      
REMARK 465     ILE A   865                                                      
REMARK 465     ASN A   866                                                      
REMARK 465     GLY A   867                                                      
REMARK 465     GLU A   868                                                      
REMARK 465     SER A   869                                                      
REMARK 465     GLY A   870                                                      
REMARK 465     GLN A   871                                                      
REMARK 465     ALA A   872                                                      
REMARK 465     LYS A   873                                                      
REMARK 465     ARG A   874                                                      
REMARK 465     ASN A   875                                                      
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT                     
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT.                            
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI           DISTANCE          
REMARK 500   O2   CIT A   101     O    HOH A   906              1.92            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS                                             
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC             
REMARK 500 SYMMETRY ARE IN CLOSE CONTACT.  AN ATOM LOCATED WITHIN 0.15          
REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A           
REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375             
REMARK 500 INSTEAD OF REMARK 500.  ATOMS WITH NON-BLANK ALTERNATE               
REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS.            
REMARK 500                                                                      
REMARK 500 DISTANCE CUTOFF:                                                     
REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS              
REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS                  
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI  SSYMOP   DISTANCE          
REMARK 500   C6   CIT A   101     O6   CIT A   101     4655     1.06            
REMARK 500   O5   CIT A   101     O6   CIT A   101     4655     1.06            
REMARK 500   C3   CIT A   101     O7   CIT A   101     4655     1.44            
REMARK 500   C3   CIT A   101     C4   CIT A   101     4655     1.50            
REMARK 500   O7   CIT A   101     C4   CIT A   101     4655     1.52            
REMARK 500   O6   CIT A   101     O6   CIT A   101     4655     1.71            
REMARK 500   C6   CIT A   101     O5   CIT A   101     4655     1.93            
REMARK 500   O7   CIT A   101     C6   CIT A   101     4655     1.95            
REMARK 500   C4   CIT A   101     C4   CIT A   101     4655     1.99            
REMARK 500   C2   CIT A   101     C3   CIT A   101     4655     2.02            
REMARK 500   C2   CIT A   101     C4   CIT A   101     4655     2.04            
REMARK 500   C2   CIT A   101     C6   CIT A   101     4655     2.11            
REMARK 500   C2   CIT A   101     O7   CIT A   101     4655     2.12            
REMARK 500   O7   CIT A   101     O5   CIT A   101     4655     2.15            
REMARK 500   OE1  GLN A   827     O1   CIT A   101     4655     2.16            
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 748   CB  -  CG  -  OD2 ANGL. DEV. =   6.5 DEGREES          
REMARK 500    ASP A 838   CB  -  CG  -  OD2 ANGL. DEV. =   5.5 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    SER A 562      -72.72   -103.69                                   
REMARK 500    ASP A 563      -21.51     93.16                                   
REMARK 500    LYS A 630      -73.02    -94.73                                   
REMARK 500    LYS A 741     -131.22    -67.29                                   
REMARK 500    ASN A 742       45.11   -158.53                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
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 A   1  ZN                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 PO4 A 102   O3                                                     
REMARK 620 2 HIS A 617   NE2  98.5                                              
REMARK 620 3 HIS A 653   NE2 130.1 112.5                                        
REMARK 620 4 ASP A 764   OD1 114.0  94.3 102.0                                  
REMARK 620 N                    1     2     3                                   
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 1                    
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE PO4 A 102                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CIT A 101                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1T9S   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1TAZ   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1TB5   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1TB7   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1TBB   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1TBF   RELATED DB: PDB                                   
DBREF  1T9R A  531   875  UNP    O76074   PDE5A_HUMAN    531    875             
SEQADV 1T9R MET A  510  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R GLY A  511  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R SER A  512  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R SER A  513  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R HIS A  514  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R HIS A  515  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R HIS A  516  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R HIS A  517  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R HIS A  518  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R HIS A  519  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R SER A  520  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R SER A  521  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R GLY A  522  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R LEU A  523  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R VAL A  524  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R PRO A  525  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R ARG A  526  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R GLY A  527  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R SER A  528  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R HIS A  529  UNP  O76074              EXPRESSION TAG                 
SEQADV 1T9R MET A  530  UNP  O76074              EXPRESSION TAG                 
SEQRES   1 A  366  MET GLY SER SER HIS HIS HIS HIS HIS HIS SER SER GLY          
SEQRES   2 A  366  LEU VAL PRO ARG GLY SER HIS MET SER ALA ALA GLU GLU          
SEQRES   3 A  366  GLU THR ARG GLU LEU GLN SER LEU ALA ALA ALA VAL VAL          
SEQRES   4 A  366  PRO SER ALA GLN THR LEU LYS ILE THR ASP PHE SER PHE          
SEQRES   5 A  366  SER ASP PHE GLU LEU SER ASP LEU GLU THR ALA LEU CYS          
SEQRES   6 A  366  THR ILE ARG MET PHE THR ASP LEU ASN LEU VAL GLN ASN          
SEQRES   7 A  366  PHE GLN MET LYS HIS GLU VAL LEU CYS ARG TRP ILE LEU          
SEQRES   8 A  366  SER VAL LYS LYS ASN TYR ARG LYS ASN VAL ALA TYR HIS          
SEQRES   9 A  366  ASN TRP ARG HIS ALA PHE ASN THR ALA GLN CYS MET PHE          
SEQRES  10 A  366  ALA ALA LEU LYS ALA GLY LYS ILE GLN ASN LYS LEU THR          
SEQRES  11 A  366  ASP LEU GLU ILE LEU ALA LEU LEU ILE ALA ALA LEU SER          
SEQRES  12 A  366  HIS ASP LEU ASP HIS ARG GLY VAL ASN ASN SER TYR ILE          
SEQRES  13 A  366  GLN ARG SER GLU HIS PRO LEU ALA GLN LEU TYR CYS HIS          
SEQRES  14 A  366  SER ILE MET GLU HIS HIS HIS PHE ASP GLN CYS LEU MET          
SEQRES  15 A  366  ILE LEU ASN SER PRO GLY ASN GLN ILE LEU SER GLY LEU          
SEQRES  16 A  366  SER ILE GLU GLU TYR LYS THR THR LEU LYS ILE ILE LYS          
SEQRES  17 A  366  GLN ALA ILE LEU ALA THR ASP LEU ALA LEU TYR ILE LYS          
SEQRES  18 A  366  ARG ARG GLY GLU PHE PHE GLU LEU ILE ARG LYS ASN GLN          
SEQRES  19 A  366  PHE ASN LEU GLU ASP PRO HIS GLN LYS GLU LEU PHE LEU          
SEQRES  20 A  366  ALA MET LEU MET THR ALA CYS ASP LEU SER ALA ILE THR          
SEQRES  21 A  366  LYS PRO TRP PRO ILE GLN GLN ARG ILE ALA GLU LEU VAL          
SEQRES  22 A  366  ALA THR GLU PHE PHE ASP GLN GLY ASP ARG GLU ARG LYS          
SEQRES  23 A  366  GLU LEU ASN ILE GLU PRO THR ASP LEU MET ASN ARG GLU          
SEQRES  24 A  366  LYS LYS ASN LYS ILE PRO SER MET GLN VAL GLY PHE ILE          
SEQRES  25 A  366  ASP ALA ILE CYS LEU GLN LEU TYR GLU ALA LEU THR HIS          
SEQRES  26 A  366  VAL SER GLU ASP CYS PHE PRO LEU LEU ASP GLY CYS ARG          
SEQRES  27 A  366  LYS ASN ARG GLN LYS TRP GLN ALA LEU ALA GLU GLN GLN          
SEQRES  28 A  366  GLU LYS MET LEU ILE ASN GLY GLU SER GLY GLN ALA LYS          
SEQRES  29 A  366  ARG ASN                                                      
HET     ZN  A   1       1                                                       
HET    PO4  A 102       5                                                       
HET    CIT  A 101      13                                                       
HETNAM      ZN ZINC ION                                                         
HETNAM     PO4 PHOSPHATE ION                                                    
HETNAM     CIT CITRIC ACID                                                      
FORMUL   2   ZN    ZN 2+                                                        
FORMUL   3  PO4    O4 P 3-                                                      
FORMUL   4  CIT    C6 H8 O7                                                     
FORMUL   5  HOH   *90(H2 O)                                                     
HELIX    1   1 GLU A  534  ALA A  546  1                                  13    
HELIX    2   2 SER A  550  LYS A  555  1                                   6    
HELIX    3   3 SER A  567  LEU A  582  1                                  16    
HELIX    4   4 ASN A  583  PHE A  588  1                                   6    
HELIX    5   5 LYS A  591  TYR A  606  1                                  16    
HELIX    6   6 VAL A  610  HIS A  613  5                                   4    
HELIX    7   7 ASN A  614  ALA A  631  1                                  18    
HELIX    8   8 ILE A  634  LEU A  638  5                                   5    
HELIX    9   9 THR A  639  HIS A  653  1                                  15    
HELIX   10  10 PHE A  686  ASN A  694  1                                   9    
HELIX   11  11 SER A  705  ALA A  722  1                                  18    
HELIX   12  12 ASP A  724  LYS A  741  1                                  18    
HELIX   13  13 ASP A  748  LEU A  765  1                                  18    
HELIX   14  14 SER A  766  LYS A  770  5                                   5    
HELIX   15  15 PRO A  771  ASP A  788  1                                  18    
HELIX   16  16 LEU A  804  ASN A  811  1                                   8    
HELIX   17  17 LYS A  812  ILE A  824  1                                  13    
HELIX   18  18 CYS A  825  SER A  836  1                                  12    
HELIX   19  19 CYS A  839  GLU A  861  1                                  23    
LINK        ZN    ZN A   1                 O3  PO4 A 102     1555   1555  1.73  
LINK        ZN    ZN A   1                 NE2 HIS A 617     1555   1555  2.07  
LINK        ZN    ZN A   1                 NE2 HIS A 653     1555   1555  2.11  
LINK        ZN    ZN A   1                 OD1 ASP A 764     1555   1555  1.97  
SITE     1 AC1  5 PO4 A 102  HIS A 617  HIS A 653  ASP A 654                    
SITE     2 AC1  5 ASP A 764                                                     
SITE     1 AC2 10  ZN A   1  HIS A 613  HIS A 617  HIS A 653                    
SITE     2 AC2 10 ASP A 654  HIS A 678  GLU A 682  HIS A 684                    
SITE     3 AC2 10 THR A 723  ASP A 764                                          
SITE     1 AC3  7 ILE A 729  ARG A 732  GLY A 733  PHE A 736                    
SITE     2 AC3  7 ARG A 740  GLN A 827  HOH A 906                               
CRYST1   96.411   96.411   79.026  90.00  90.00 120.00 P 62          6          
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      0.010372  0.005988  0.000000        0.00000                         
SCALE2      0.000000  0.011977  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.012654        0.00000