HEADER    OXIDOREDUCTASE/OXIDOREDUCTASE INHIBITOR 15-JUL-09   3IBD              
TITLE     CRYSTAL STRUCTURE OF A CYTOCHROME P450 2B6 GENETIC VARIANT IN COMPLEX 
TITLE    2 WITH THE INHIBITOR 4-(4-CHLOROPHENYL)IMIDAZOLE                       
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: CYTOCHROME P450 2B6;                                       
COMPND   3 CHAIN: A;                                                            
COMPND   4 SYNONYM: CYPIIB6, P450 IIB1;                                         
COMPND   5 EC: 1.14.14.1;                                                       
COMPND   6 ENGINEERED: YES;                                                     
COMPND   7 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 GENE: CYP2B6;                                                        
SOURCE   6 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   7 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   8 EXPRESSION_SYSTEM_STRAIN: JM109;                                     
SOURCE   9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE  10 EXPRESSION_SYSTEM_PLASMID: PKK                                       
KEYWDS    P450, CYTOCHROME P450 2B6, MONOOXYGENASE, OXIDOREDUCTASE, MEMBRANE    
KEYWDS   2 PROTEIN, CYP 2B6, ENDOPLASMIC RETICULUM, HEME, IRON, MEMBRANE,       
KEYWDS   3 METAL-BINDING, MICROSOME, PHOSPHOPROTEIN, OXIDOREDUCTASE-            
KEYWDS   4 OXIDOREDUCTASE INHIBITOR COMPLEX                                     
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    S.C.GAY,L.SUN,J.C.TALAKAD,M.B.SHAH,D.C.STOUT,J.R.HALPERT              
REVDAT   5   06-SEP-23 3IBD    1       REMARK                                   
REVDAT   4   13-OCT-21 3IBD    1       REMARK SEQADV                            
REVDAT   3   26-OCT-11 3IBD    1       HEADER VERSN                             
REVDAT   2   28-APR-10 3IBD    1       JRNL                                     
REVDAT   1   19-JAN-10 3IBD    0                                                
JRNL        AUTH   S.C.GAY,M.B.SHAH,J.C.TALAKAD,K.MAEKAWA,A.G.ROBERTS,          
JRNL        AUTH 2 P.R.WILDERMAN,L.SUN,J.Y.YANG,S.C.HUELGA,W.X.HONG,Q.ZHANG,    
JRNL        AUTH 3 C.D.STOUT,J.R.HALPERT                                        
JRNL        TITL   CRYSTAL STRUCTURE OF A CYTOCHROME P450 2B6 GENETIC VARIANT   
JRNL        TITL 2 IN COMPLEX WITH THE INHIBITOR 4-(4-CHLOROPHENYL)IMIDAZOLE AT 
JRNL        TITL 3 2.0-A RESOLUTION.                                            
JRNL        REF    MOL.PHARMACOL.                V.  77   529 2010              
JRNL        REFN                   ISSN 0026-895X                               
JRNL        PMID   20061448                                                     
JRNL        DOI    10.1124/MOL.109.062570                                       
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.00 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC                                               
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) : 2.00                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 98.45                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 98.1                           
REMARK   3   NUMBER OF REFLECTIONS             : 32494                          
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) : 0.181                           
REMARK   3   R VALUE            (WORKING SET) : 0.178                           
REMARK   3   FREE R VALUE                     : 0.228                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1640                            
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) : 2.00                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.05                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 1955                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 84.50                        
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2070                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 101                          
REMARK   3   BIN FREE R VALUE                    : 0.2870                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 3699                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 89                                      
REMARK   3   SOLVENT ATOMS            : 176                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 21.92                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 0.88000                                              
REMARK   3    B22 (A**2) : -0.69000                                             
REMARK   3    B33 (A**2) : -0.26000                                             
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : -0.26000                                             
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.189         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.168         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.114         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 4.010         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.950                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.917                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  3925 ; 0.018 ; 0.022       
REMARK   3   BOND LENGTHS OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  5327 ; 1.767 ; 2.007       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   474 ; 6.384 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):   179 ;34.825 ;22.793       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):   633 ;17.358 ;15.000       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):    29 ;19.742 ;15.000       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   567 ; 0.122 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  3007 ; 0.007 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):  1928 ; 0.232 ; 0.200       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  2697 ; 0.316 ; 0.200       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):   200 ; 0.173 ; 0.200       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):     1 ; 0.035 ; 0.200       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):    67 ; 0.320 ; 0.200       
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):    16 ; 0.198 ; 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):  2346 ; 1.061 ; 1.500       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  3784 ; 1.925 ; 2.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  1580 ; 3.030 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  1538 ; 4.813 ; 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  : NULL                                       
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED : MASK                                                 
REMARK   3   PARAMETERS FOR MASK CALCULATION                                    
REMARK   3   VDW PROBE RADIUS   : 1.20                                          
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 3IBD COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 16-JUL-09.                  
REMARK 100 THE DEPOSITION ID IS D_1000054200.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 19-JUN-09                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 5.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : SSRL                               
REMARK 200  BEAMLINE                       : BL11-1                             
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.98                               
REMARK 200  MONOCHROMATOR                  : SI(111)                            
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : MARMOSAIC 325 MM CCD               
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : MOSFLM                             
REMARK 200  DATA SCALING SOFTWARE          : SCALA 3.2.25                       
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 32536                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.998                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 98.451                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 98.3                               
REMARK 200  DATA REDUNDANCY                : 6.900                              
REMARK 200  R MERGE                    (I) : 0.13100                            
REMARK 200  R SYM                      (I) : 0.13100                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 11.8000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.00                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.11                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 88.1                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 4.10                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.48700                            
REMARK 200  R SYM FOR SHELL            (I) : 0.48700                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 1.400                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: PHASER 1.3.3                                          
REMARK 200 STARTING MODEL: ENSEMBLE OF PDB ID 2Q6N (A CHAIN), 1SUO, 2BDM,       
REMARK 200  3G5N (A CHAIN) EACH WITH RESIDUES 101-120, 205-232 OMITTED          
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 45.30                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.25                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 0.1 M SODIUM ACETATE (PH 5.5), 0.2 M     
REMARK 280  POTASSIUM THIOCYANATE, 10% (W/V) PEG 1000, 10% (W/V) PEG 8000,      
REMARK 280  VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 291K                     
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 1 2 1                          
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,Y,-Z                                                 
REMARK 290       3555   X+1/2,Y+1/2,Z                                           
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        0.00000            
REMARK 290   SMTRY2   2  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   3  1.000000  0.000000  0.000000       44.78650            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       27.87000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4 -1.000000  0.000000  0.000000       44.78650            
REMARK 290   SMTRY2   4  0.000000  1.000000  0.000000       27.87000            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
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 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 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC                  
REMARK 350 SOFTWARE USED: PISA                                                  
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 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     1                                                      
REMARK 465     ALA A     2                                                      
REMARK 465     LYS A    22                                                      
REMARK 465     LYS A    23                                                      
REMARK 465     THR A    24                                                      
REMARK 465     SER A    25                                                      
REMARK 465     SER A    26                                                      
REMARK 465     LYS A    27                                                      
REMARK 465     HIS A   493                                                      
REMARK 465     HIS A   494                                                      
REMARK 465     HIS A   495                                                      
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     ARG A  35    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     LEU A  39    CG   CD1  CD2                                       
REMARK 470     GLU A  60    CG   CD   OE1  OE2                                  
REMARK 470     LYS A 100    CG   CD   CE   NZ                                   
REMARK 470     ARG A 133    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     MET A 137    CG   SD   CE                                        
REMARK 470     LYS A 139    CG   CD   CE   NZ                                   
REMARK 470     LYS A 159    CG   CD   CE   NZ                                   
REMARK 470     GLU A 218    CG   CD   OE1  OE2                                  
REMARK 470     LYS A 251    CG   CD   CE   NZ                                   
REMARK 470     GLU A 275    CG   CD   OE1  OE2                                  
REMARK 470     HIS A 280    CG   ND1  CD2  CE1  NE2                             
REMARK 470     PHE A 283    CG   CD1  CD2  CE1  CE2  CZ                         
REMARK 470     ASN A 417    CG   OD1  ND2                                       
REMARK 470     HIS A 492    CG   ND1  CD2  CE1  NE2                             
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    ARG A 308   NE  -  CZ  -  NH1 ANGL. DEV. =   3.7 DEGREES          
REMARK 500    ARG A 308   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.0 DEGREES          
REMARK 500    ARG A 434   NE  -  CZ  -  NH1 ANGL. DEV. =   3.7 DEGREES          
REMARK 500    ARG A 434   NE  -  CZ  -  NH2 ANGL. DEV. =  -6.4 DEGREES          
REMARK 500    ARG A 491   CG  -  CD  -  NE  ANGL. DEV. = -16.3 DEGREES          
REMARK 500    ARG A 491   NE  -  CZ  -  NH1 ANGL. DEV. =   5.0 DEGREES          
REMARK 500    ARG A 491   NE  -  CZ  -  NH2 ANGL. DEV. =  -7.3 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    LYS A  29     -121.79   -137.86                                   
REMARK 500    SER A 281       36.63     38.80                                   
REMARK 500    SER A 430     -159.86     69.95                                   
REMARK 500    CYS A 436      119.75    -32.36                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 610                                                                      
REMARK 610 MISSING HETEROATOM                                                   
REMARK 610 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER;           
REMARK 610 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 610 I=INSERTION CODE):                                                   
REMARK 610   M RES C SSEQI                                                      
REMARK 610     CM5 A 1001                                                       
REMARK 610     CM5 A 1002                                                       
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                             HEM A 500  FE                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 CYS A 436   SG                                                     
REMARK 620 2 HEM A 500   NA   97.0                                              
REMARK 620 3 HEM A 500   NB   87.0  85.8                                        
REMARK 620 4 HEM A 500   NC   84.4 178.5  94.2                                  
REMARK 620 5 HEM A 500   ND   93.5  90.5 176.4  89.5                            
REMARK 620 6 CPZ A 501   N1  177.2  85.5  92.1  93.0  87.5                      
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 HEM A 500                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CPZ A 501                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CM5 A 1001                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CM5 A 1002                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SCN A 1003                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SCN A 1004                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC7                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SCN A 1005                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC8                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SCN A 1006                
DBREF  3IBD A   30   491  UNP    P20813   CP2B6_HUMAN     30    491             
SEQADV 3IBD MET A    1  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD ALA A    2  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD LYS A   22  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD LYS A   23  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD THR A   24  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD SER A   25  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD SER A   26  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD LYS A   27  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD GLY A   28  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD LYS A   29  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD HIS A  226  UNP  P20813    TYR   226 ENGINEERED MUTATION            
SEQADV 3IBD ARG A  262  UNP  P20813    LYS   262 ENGINEERED MUTATION            
SEQADV 3IBD HIS A  492  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD HIS A  493  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD HIS A  494  UNP  P20813              EXPRESSION TAG                 
SEQADV 3IBD HIS A  495  UNP  P20813              EXPRESSION TAG                 
SEQRES   1 A  476  MET ALA LYS LYS THR SER SER LYS GLY LYS LEU PRO PRO          
SEQRES   2 A  476  GLY PRO ARG PRO LEU PRO LEU LEU GLY ASN LEU LEU GLN          
SEQRES   3 A  476  MET ASP ARG ARG GLY LEU LEU LYS SER PHE LEU ARG PHE          
SEQRES   4 A  476  ARG GLU LYS TYR GLY ASP VAL PHE THR VAL HIS LEU GLY          
SEQRES   5 A  476  PRO ARG PRO VAL VAL MET LEU CYS GLY VAL GLU ALA ILE          
SEQRES   6 A  476  ARG GLU ALA LEU VAL ASP LYS ALA GLU ALA PHE SER GLY          
SEQRES   7 A  476  ARG GLY LYS ILE ALA MET VAL ASP PRO PHE PHE ARG GLY          
SEQRES   8 A  476  TYR GLY VAL ILE PHE ALA ASN GLY ASN ARG TRP LYS VAL          
SEQRES   9 A  476  LEU ARG ARG PHE SER VAL THR THR MET ARG ASP PHE GLY          
SEQRES  10 A  476  MET GLY LYS ARG SER VAL GLU GLU ARG ILE GLN GLU GLU          
SEQRES  11 A  476  ALA GLN CYS LEU ILE GLU GLU LEU ARG LYS SER LYS GLY          
SEQRES  12 A  476  ALA LEU MET ASP PRO THR PHE LEU PHE GLN SER ILE THR          
SEQRES  13 A  476  ALA ASN ILE ILE CYS SER ILE VAL PHE GLY LYS ARG PHE          
SEQRES  14 A  476  HIS TYR GLN ASP GLN GLU PHE LEU LYS MET LEU ASN LEU          
SEQRES  15 A  476  PHE TYR GLN THR PHE SER LEU ILE SER SER VAL PHE GLY          
SEQRES  16 A  476  GLN LEU PHE GLU LEU PHE SER GLY PHE LEU LYS HIS PHE          
SEQRES  17 A  476  PRO GLY ALA HIS ARG GLN VAL TYR LYS ASN LEU GLN GLU          
SEQRES  18 A  476  ILE ASN ALA TYR ILE GLY HIS SER VAL GLU LYS HIS ARG          
SEQRES  19 A  476  GLU THR LEU ASP PRO SER ALA PRO ARG ASP LEU ILE ASP          
SEQRES  20 A  476  THR TYR LEU LEU HIS MET GLU LYS GLU LYS SER ASN ALA          
SEQRES  21 A  476  HIS SER GLU PHE SER HIS GLN ASN LEU ASN LEU ASN THR          
SEQRES  22 A  476  LEU SER LEU PHE PHE ALA GLY THR GLU THR THR SER THR          
SEQRES  23 A  476  THR LEU ARG TYR GLY PHE LEU LEU MET LEU LYS TYR PRO          
SEQRES  24 A  476  HIS VAL ALA GLU ARG VAL TYR ARG GLU ILE GLU GLN VAL          
SEQRES  25 A  476  ILE GLY PRO HIS ARG PRO PRO GLU LEU HIS ASP ARG ALA          
SEQRES  26 A  476  LYS MET PRO TYR THR GLU ALA VAL ILE TYR GLU ILE GLN          
SEQRES  27 A  476  ARG PHE SER ASP LEU LEU PRO MET GLY VAL PRO HIS ILE          
SEQRES  28 A  476  VAL THR GLN HIS THR SER PHE ARG GLY TYR ILE ILE PRO          
SEQRES  29 A  476  LYS ASP THR GLU VAL PHE LEU ILE LEU SER THR ALA LEU          
SEQRES  30 A  476  HIS ASP PRO HIS TYR PHE GLU LYS PRO ASP ALA PHE ASN          
SEQRES  31 A  476  PRO ASP HIS PHE LEU ASP ALA ASN GLY ALA LEU LYS LYS          
SEQRES  32 A  476  THR GLU ALA PHE ILE PRO PHE SER LEU GLY LYS ARG ILE          
SEQRES  33 A  476  CYS LEU GLY GLU GLY ILE ALA ARG ALA GLU LEU PHE LEU          
SEQRES  34 A  476  PHE PHE THR THR ILE LEU GLN ASN PHE SER MET ALA SER          
SEQRES  35 A  476  PRO VAL ALA PRO GLU ASP ILE ASP LEU THR PRO GLN GLU          
SEQRES  36 A  476  CYS GLY VAL GLY LYS ILE PRO PRO THR TYR GLN ILE ARG          
SEQRES  37 A  476  PHE LEU PRO ARG HIS HIS HIS HIS                              
HET    HEM  A 500      43                                                       
HET    CPZ  A 501      12                                                       
HET    CM5  A1001      12                                                       
HET    CM5  A1002      10                                                       
HET    SCN  A1003       3                                                       
HET    SCN  A1004       3                                                       
HET    SCN  A1005       3                                                       
HET    SCN  A1006       3                                                       
HETNAM     HEM PROTOPORPHYRIN IX CONTAINING FE                                  
HETNAM     CPZ 4-(4-CHLOROPHENYL)IMIDAZOLE                                      
HETNAM     CM5 5-CYCLOHEXYL-1-PENTYL-BETA-D-MALTOSIDE                           
HETNAM     SCN THIOCYANATE ION                                                  
HETSYN     HEM HEME                                                             
HETSYN     CM5 5-CYCLOHEXYLPENTYL 4-O-ALPHA-D-GLUCOPYRANOSYL-BETA-D-            
HETSYN   2 CM5  GLUCOPYRANOSIDE; CYMAL-5                                        
FORMUL   2  HEM    C34 H32 FE N4 O4                                             
FORMUL   3  CPZ    C9 H7 CL N2                                                  
FORMUL   4  CM5    2(C23 H42 O11)                                               
FORMUL   6  SCN    4(C N S 1-)                                                  
FORMUL  10  HOH   *176(H2 O)                                                    
HELIX    1   1 ASN A   42  MET A   46  5                                   5    
HELIX    2   2 GLY A   50  GLY A   63  1                                  14    
HELIX    3   3 GLY A   80  VAL A   89  1                                  10    
HELIX    4   4 GLU A   93  SER A   96  5                                   4    
HELIX    5   5 VAL A  104  ARG A  109  1                                   6    
HELIX    6   6 ASN A  117  PHE A  135  1                                  19    
HELIX    7   7 SER A  141  SER A  160  1                                  20    
HELIX    8   8 PRO A  167  GLY A  185  1                                  19    
HELIX    9   9 ASP A  192  SER A  210  1                                  19    
HELIX   10  10 SER A  211  LYS A  225  1                                  15    
HELIX   11  11 GLY A  229  THR A  255  1                                  27    
HELIX   12  12 ASP A  263  LYS A  276  1                                  14    
HELIX   13  13 ASN A  287  TYR A  317  1                                  31    
HELIX   14  14 TYR A  317  ILE A  332  1                                  16    
HELIX   15  15 GLU A  339  LYS A  345  5                                   7    
HELIX   16  16 MET A  346  ASP A  361  1                                  16    
HELIX   17  17 ILE A  391  HIS A  397  1                                   7    
HELIX   18  18 ASN A  409  LEU A  414  5                                   6    
HELIX   19  19 LEU A  431  ILE A  435  5                                   5    
HELIX   20  20 GLY A  438  ASN A  456  1                                  19    
HELIX   21  21 ALA A  464  ILE A  468  5                                   5    
SHEET    1   A 5 VAL A  65  LEU A  70  0                                        
SHEET    2   A 5 ARG A  73  LEU A  78 -1  O  MET A  77   N  PHE A  66           
SHEET    3   A 5 GLU A 387  LEU A 390  1  O  PHE A 389   N  VAL A  76           
SHEET    4   A 5 HIS A 369  ILE A 370 -1  N  HIS A 369   O  VAL A 388           
SHEET    5   A 5 GLY A  97  ARG A  98 -1  N  GLY A  97   O  ILE A 370           
SHEET    1   B 2 THR A 375  PHE A 377  0                                        
SHEET    2   B 2 TYR A 380  ILE A 382 -1  O  ILE A 382   N  THR A 375           
SHEET    1   C 2 PHE A 457  ALA A 460  0                                        
SHEET    2   C 2 ARG A 487  PRO A 490 -1  O  LEU A 489   N  SER A 458           
SHEET    1   D 2 GLU A 474  CYS A 475  0                                        
SHEET    2   D 2 LYS A 479  ILE A 480 -1  O  ILE A 480   N  GLU A 474           
LINK         SG  CYS A 436                FE   HEM A 500     1555   1555  2.25  
LINK        FE   HEM A 500                 N1  CPZ A 501     1555   1555  2.37  
SITE     1 AC1 24 HOH A  14  ARG A  98  VAL A 113  ILE A 114                    
SITE     2 AC1 24 TRP A 121  ARG A 125  ALA A 298  GLY A 299                    
SITE     3 AC1 24 THR A 302  THR A 303  THR A 306  GLN A 357                    
SITE     4 AC1 24 LEU A 363  VAL A 367  HIS A 369  LEU A 392                    
SITE     5 AC1 24 PRO A 428  PHE A 429  SER A 430  ARG A 434                    
SITE     6 AC1 24 CYS A 436  LEU A 437  GLY A 438  CPZ A 501                    
SITE     1 AC2  6 PHE A 297  ALA A 298  THR A 302  VAL A 367                    
SITE     2 AC2  6 HOH A 497  HEM A 500                                          
SITE     1 AC3  6 PHE A 188  GLU A 194  MET A 198  PHE A 202                    
SITE     2 AC3  6 TYR A 244  PHE A 296                                          
SITE     1 AC4  2 ASP A  47  LEU A  51                                          
SITE     1 AC5  6 LYS A  91  ALA A  92  GLU A  93  ALA A  94                    
SITE     2 AC5  6 SER A 461  PRO A 462                                          
SITE     1 AC6  5 ALA A 321  GLU A 322  MET A 459  ARG A 491                    
SITE     2 AC6  5 HOH A 607                                                     
SITE     1 AC7  3 TYR A 317  PRO A 318  HIS A 319                               
SITE     1 AC8  3 ARG A  57  PHE A  58  LYS A  61                               
CRYST1   89.573   55.740   99.090  90.00  96.51  90.00 C 1 2 1       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      0.011164  0.000000  0.001274        0.00000                         
SCALE2      0.000000  0.017940  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.010157        0.00000