HEADER    OXIDOREDUCTASE                          01-OCT-08   3EQM              
TITLE     CRYSTAL STRUCTURE OF HUMAN PLACENTAL AROMATASE CYTOCHROME P450 IN     
TITLE    2 COMPLEX WITH ANDROSTENEDIONE                                         
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: CYTOCHROME P450 19A1;                                      
COMPND   3 CHAIN: A;                                                            
COMPND   4 SYNONYM: AROMATASE, CYPXIX, ESTROGEN SYNTHETASE, P-450AROM;          
COMPND   5 EC: 1.14.14.1                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: HOMO SAPIENS;                                   
SOURCE   3 ORGANISM_COMMON: HUMAN;                                              
SOURCE   4 ORGANISM_TAXID: 9606;                                                
SOURCE   5 ORGAN: PLACENTA                                                      
KEYWDS    HUMAN AROMATASE, CYTOCHROME P450, MEMBRANE PROTEIN, MICROSOMAL,       
KEYWDS   2 ESTROGEN, BIOSYNTHESIS OF STEROID HORMONE, DISEASE MUTATION, HEME,   
KEYWDS   3 IRON, METAL-BINDING, MONOOXYGENASE, OXIDOREDUCTASE, PHOSPHOPROTEIN   
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    D.GHOSH                                                               
REVDAT   4   21-FEB-24 3EQM    1       REMARK                                   
REVDAT   3   21-MAR-12 3EQM    1       JRNL   VERSN                             
REVDAT   2   30-DEC-08 3EQM    1       JRNL                                     
REVDAT   1   23-DEC-08 3EQM    0                                                
JRNL        AUTH   D.GHOSH,J.GRISWOLD,M.ERMAN,W.PANGBORN                        
JRNL        TITL   STRUCTURAL BASIS FOR ANDROGEN SPECIFICITY AND OESTROGEN      
JRNL        TITL 2 SYNTHESIS IN HUMAN AROMATASE.                                
JRNL        REF    NATURE                        V. 457   219 2009              
JRNL        REFN                   ISSN 0028-0836                               
JRNL        PMID   19129847                                                     
JRNL        DOI    10.1038/NATURE07614                                          
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.90 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.2.0019                                      
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) : 2.90                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 37.77                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 99.4                           
REMARK   3   NUMBER OF REFLECTIONS             : 28808                          
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) : 0.215                           
REMARK   3   R VALUE            (WORKING SET) : 0.214                           
REMARK   3   FREE R VALUE                     : 0.244                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1532                            
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) : 2.90                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.97                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 2106                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 99.51                        
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3150                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 128                          
REMARK   3   BIN FREE R VALUE                    : 0.3620                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 3658                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 74                                      
REMARK   3   SOLVENT ATOMS            : 35                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 77.28                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 2.89000                                              
REMARK   3    B22 (A**2) : 2.89000                                              
REMARK   3    B33 (A**2) : -4.33000                                             
REMARK   3    B12 (A**2) : 1.44000                                              
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): 0.330         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.261         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.192         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 10.200        
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.942                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.910                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  3819 ; 0.009 ; 0.022       
REMARK   3   BOND LENGTHS OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  5168 ; 1.321 ; 2.016       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   451 ; 6.140 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):   165 ;34.690 ;23.576       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):   711 ;20.152 ;15.000       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):    25 ;14.316 ;15.000       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   564 ; 0.102 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  2808 ; 0.003 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):  1874 ; 0.219 ; 0.200       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  2643 ; 0.311 ; 0.200       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):   122 ; 0.155 ; 0.200       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):    24 ; 0.220 ; 0.200       
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):     4 ; 0.182 ; 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):  2291 ; 0.472 ; 1.500       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  3659 ; 0.880 ; 2.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  1693 ; 1.007 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  1507 ; 1.712 ; 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: NULL                                      
REMARK   4                                                                      
REMARK   4 3EQM COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 01-OCT-08.                  
REMARK 100 THE DEPOSITION ID IS D_1000049653.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 28-NOV-07                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 7.4                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : APS                                
REMARK 200  BEAMLINE                       : 19-ID                              
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.979                              
REMARK 200  MONOCHROMATOR                  : SI                                 
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 315                   
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : HKL-3000                           
REMARK 200  DATA SCALING SOFTWARE          : HKL-3000                           
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 28808                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.897                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 121.270                            
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.5                               
REMARK 200  DATA REDUNDANCY                : NULL                               
REMARK 200  R MERGE                    (I) : NULL                               
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : NULL                               
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.90                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.97                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 99.6                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 6.10                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.06700                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 31.10                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: AMORE                                                 
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 78.94                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 5.84                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: FRESHLY PURIFIED AROMATASE IN 100MM      
REMARK 280  POTASSIUM PHOSPHATE BUFFER, PH 7.4, CONTAINING 20% GLYCEROL,        
REMARK 280  0.1MM ANDROSTENEDIONE, AND 1MM N-DODECYL-D-MALTOPYRANOSIDE (BDM)    
REMARK 280  WAS MIXED WITH RESERVOIR COCKTAILS OF 24 TO 30% POLYETHYLENE        
REMARK 280  GLYCOL 4000 AND 0.5M NACL IN 0.05M TRIS-HCL BUFFER PH 8.5 AND       
REMARK 280  VAPOR DIFFUSED IN SEALED 24-WELL SITTING DROP PLATES AGAINST        
REMARK 280  CORRESPONDING RESERVOIR SOLUTION. THE PURIFICATION AND              
REMARK 280  CRYSTALLIZATION EXPERIMENTS WERE ALL CONDUCTED AT 4 C. REDDISH-     
REMARK 280  BROWN COLOR HEXAGONAL ROD-SHAPED CRYSTALS APPEARED IN 7-10 DAYS     
REMARK 280  AND CONTINUED TO GROW UP TO 14-16 DAYS, VAPOR DIFFUSION,            
REMARK 280  TEMPERATURE 277K                                                    
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 32 2 1                         
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   Y,X,-Z                                                  
REMARK 290       5555   X-Y,-Y,-Z+1/3                                           
REMARK 290       6555   -X,-X+Y,-Z+2/3                                          
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       79.51067            
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       39.75533            
REMARK 290   SMTRY1   4 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   4  0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   5  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   5  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   5  0.000000  0.000000 -1.000000       39.75533            
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       79.51067            
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     VAL A     2                                                      
REMARK 465     LEU A     3                                                      
REMARK 465     GLU A     4                                                      
REMARK 465     MET A     5                                                      
REMARK 465     LEU A     6                                                      
REMARK 465     ASN A     7                                                      
REMARK 465     PRO A     8                                                      
REMARK 465     ILE A     9                                                      
REMARK 465     HIS A    10                                                      
REMARK 465     TYR A    11                                                      
REMARK 465     ASN A    12                                                      
REMARK 465     ILE A    13                                                      
REMARK 465     THR A    14                                                      
REMARK 465     SER A    15                                                      
REMARK 465     ILE A    16                                                      
REMARK 465     VAL A    17                                                      
REMARK 465     PRO A    18                                                      
REMARK 465     GLU A    19                                                      
REMARK 465     ALA A    20                                                      
REMARK 465     MET A    21                                                      
REMARK 465     PRO A    22                                                      
REMARK 465     ALA A    23                                                      
REMARK 465     ALA A    24                                                      
REMARK 465     THR A    25                                                      
REMARK 465     MET A    26                                                      
REMARK 465     PRO A    27                                                      
REMARK 465     VAL A    28                                                      
REMARK 465     LEU A    29                                                      
REMARK 465     LEU A    30                                                      
REMARK 465     LEU A    31                                                      
REMARK 465     THR A    32                                                      
REMARK 465     GLY A    33                                                      
REMARK 465     LEU A    34                                                      
REMARK 465     PHE A    35                                                      
REMARK 465     LEU A    36                                                      
REMARK 465     LEU A    37                                                      
REMARK 465     VAL A    38                                                      
REMARK 465     TRP A    39                                                      
REMARK 465     ASN A    40                                                      
REMARK 465     TYR A    41                                                      
REMARK 465     GLU A    42                                                      
REMARK 465     GLY A    43                                                      
REMARK 465     THR A    44                                                      
REMARK 465     SER A   497                                                      
REMARK 465     ASP A   498                                                      
REMARK 465     ARG A   499                                                      
REMARK 465     CYS A   500                                                      
REMARK 465     LEU A   501                                                      
REMARK 465     GLU A   502                                                      
REMARK 465     HIS A   503                                                      
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    LEU A 301   CA  -  CB  -  CG  ANGL. DEV. =  16.4 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  46      169.09     63.07                                   
REMARK 500    CYS A  53       54.37    -99.92                                   
REMARK 500    SER A  90     -142.03     49.38                                   
REMARK 500    SER A 113       49.08    -66.92                                   
REMARK 500    ARG A 115     -167.92   -113.08                                   
REMARK 500    LYS A 130      -43.50   -138.27                                   
REMARK 500    VAL A 178       -1.19   -152.08                                   
REMARK 500    LEU A 204      -44.60   -130.99                                   
REMARK 500    ARG A 205       67.95     38.16                                   
REMARK 500    TRP A 239        6.72    -69.00                                   
REMARK 500    TYR A 241      -15.44   -142.79                                   
REMARK 500    GLU A 270       57.63    -62.10                                   
REMARK 500    LYS A 271      116.82     56.20                                   
REMARK 500    CYS A 275       60.79   -162.01                                   
REMARK 500    GLN A 367       78.76   -113.76                                   
REMARK 500    HIS A 402        0.82    -69.58                                   
REMARK 500    ASN A 421      121.01    -29.69                                   
REMARK 500    TYR A 424      -17.38     75.76                                   
REMARK 500    GLN A 464     -138.91     53.44                                   
REMARK 500    ASP A 476     -103.50   -118.17                                   
REMARK 500    PRO A 494      175.31    -56.55                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: NON-CIS, NON-TRANS                                         
REMARK 500                                                                      
REMARK 500 THE FOLLOWING PEPTIDE BONDS DEVIATE SIGNIFICANTLY FROM BOTH          
REMARK 500 CIS AND TRANS CONFORMATION.  CIS BONDS, IF ANY, ARE LISTED           
REMARK 500 ON CISPEP RECORDS.  TRANS IS DEFINED AS 180 +/- 30 AND               
REMARK 500 CIS IS DEFINED AS 0 +/- 30 DEGREES.                                  
REMARK 500                                 MODEL     OMEGA                      
REMARK 500 LYS A  287     ARG A  288                  148.44                    
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                             HEM A 600  FE                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 CYS A 437   SG                                                     
REMARK 620 2 HEM A 600   NA   98.2                                              
REMARK 620 3 HEM A 600   NB   89.2  87.7                                        
REMARK 620 4 HEM A 600   NC   94.6 167.2  91.8                                  
REMARK 620 5 HEM A 600   ND  100.4  89.9 170.4  88.5                            
REMARK 620 N                    1     2     3     4                             
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 600                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ASD A 601                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE PO4 A 602                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE PO4 A 603                 
DBREF  3EQM A    1   503  UNP    P11511   CP19A_HUMAN      1    503             
SEQRES   1 A  503  MET VAL LEU GLU MET LEU ASN PRO ILE HIS TYR ASN ILE          
SEQRES   2 A  503  THR SER ILE VAL PRO GLU ALA MET PRO ALA ALA THR MET          
SEQRES   3 A  503  PRO VAL LEU LEU LEU THR GLY LEU PHE LEU LEU VAL TRP          
SEQRES   4 A  503  ASN TYR GLU GLY THR SER SER ILE PRO GLY PRO GLY TYR          
SEQRES   5 A  503  CYS MET GLY ILE GLY PRO LEU ILE SER HIS GLY ARG PHE          
SEQRES   6 A  503  LEU TRP MET GLY ILE GLY SER ALA CYS ASN TYR TYR ASN          
SEQRES   7 A  503  ARG VAL TYR GLY GLU PHE MET ARG VAL TRP ILE SER GLY          
SEQRES   8 A  503  GLU GLU THR LEU ILE ILE SER LYS SER SER SER MET PHE          
SEQRES   9 A  503  HIS ILE MET LYS HIS ASN HIS TYR SER SER ARG PHE GLY          
SEQRES  10 A  503  SER LYS LEU GLY LEU GLN CYS ILE GLY MET HIS GLU LYS          
SEQRES  11 A  503  GLY ILE ILE PHE ASN ASN ASN PRO GLU LEU TRP LYS THR          
SEQRES  12 A  503  THR ARG PRO PHE PHE MET LYS ALA LEU SER GLY PRO GLY          
SEQRES  13 A  503  LEU VAL ARG MET VAL THR VAL CYS ALA GLU SER LEU LYS          
SEQRES  14 A  503  THR HIS LEU ASP ARG LEU GLU GLU VAL THR ASN GLU SER          
SEQRES  15 A  503  GLY TYR VAL ASP VAL LEU THR LEU LEU ARG ARG VAL MET          
SEQRES  16 A  503  LEU ASP THR SER ASN THR LEU PHE LEU ARG ILE PRO LEU          
SEQRES  17 A  503  ASP GLU SER ALA ILE VAL VAL LYS ILE GLN GLY TYR PHE          
SEQRES  18 A  503  ASP ALA TRP GLN ALA LEU LEU ILE LYS PRO ASP ILE PHE          
SEQRES  19 A  503  PHE LYS ILE SER TRP LEU TYR LYS LYS TYR GLU LYS SER          
SEQRES  20 A  503  VAL LYS ASP LEU LYS ASP ALA ILE GLU VAL LEU ILE ALA          
SEQRES  21 A  503  GLU LYS ARG ARG ARG ILE SER THR GLU GLU LYS LEU GLU          
SEQRES  22 A  503  GLU CYS MET ASP PHE ALA THR GLU LEU ILE LEU ALA GLU          
SEQRES  23 A  503  LYS ARG GLY ASP LEU THR ARG GLU ASN VAL ASN GLN CYS          
SEQRES  24 A  503  ILE LEU GLU MET LEU ILE ALA ALA PRO ASP THR MET SER          
SEQRES  25 A  503  VAL SER LEU PHE PHE MET LEU PHE LEU ILE ALA LYS HIS          
SEQRES  26 A  503  PRO ASN VAL GLU GLU ALA ILE ILE LYS GLU ILE GLN THR          
SEQRES  27 A  503  VAL ILE GLY GLU ARG ASP ILE LYS ILE ASP ASP ILE GLN          
SEQRES  28 A  503  LYS LEU LYS VAL MET GLU ASN PHE ILE TYR GLU SER MET          
SEQRES  29 A  503  ARG TYR GLN PRO VAL VAL ASP LEU VAL MET ARG LYS ALA          
SEQRES  30 A  503  LEU GLU ASP ASP VAL ILE ASP GLY TYR PRO VAL LYS LYS          
SEQRES  31 A  503  GLY THR ASN ILE ILE LEU ASN ILE GLY ARG MET HIS ARG          
SEQRES  32 A  503  LEU GLU PHE PHE PRO LYS PRO ASN GLU PHE THR LEU GLU          
SEQRES  33 A  503  ASN PHE ALA LYS ASN VAL PRO TYR ARG TYR PHE GLN PRO          
SEQRES  34 A  503  PHE GLY PHE GLY PRO ARG GLY CYS ALA GLY LYS TYR ILE          
SEQRES  35 A  503  ALA MET VAL MET MET LYS ALA ILE LEU VAL THR LEU LEU          
SEQRES  36 A  503  ARG ARG PHE HIS VAL LYS THR LEU GLN GLY GLN CYS VAL          
SEQRES  37 A  503  GLU SER ILE GLN LYS ILE HIS ASP LEU SER LEU HIS PRO          
SEQRES  38 A  503  ASP GLU THR LYS ASN MET LEU GLU MET ILE PHE THR PRO          
SEQRES  39 A  503  ARG ASN SER ASP ARG CYS LEU GLU HIS                          
HET    HEM  A 600      43                                                       
HET    ASD  A 601      21                                                       
HET    PO4  A 602       5                                                       
HET    PO4  A 603       5                                                       
HETNAM     HEM PROTOPORPHYRIN IX CONTAINING FE                                  
HETNAM     ASD 4-ANDROSTENE-3-17-DIONE                                          
HETNAM     PO4 PHOSPHATE ION                                                    
HETSYN     HEM HEME                                                             
FORMUL   2  HEM    C34 H32 FE N4 O4                                             
FORMUL   3  ASD    C19 H26 O2                                                   
FORMUL   4  PO4    2(O4 P 3-)                                                   
FORMUL   6  HOH   *35(H2 O)                                                     
HELIX    1   1 ILE A   56  GLY A   69  1                                  14    
HELIX    2   2 GLY A   69  TYR A   81  1                                  13    
HELIX    3   3 LYS A   99  HIS A  109  1                                  11    
HELIX    4   4 ASN A  110  SER A  113  5                                   4    
HELIX    5   5 SER A  118  GLY A  126  1                                   9    
HELIX    6   6 ASN A  137  LEU A  152  1                                  16    
HELIX    7   7 GLY A  154  ASP A  173  1                                  20    
HELIX    8   8 ARG A  174  VAL A  178  5                                   5    
HELIX    9   9 ASP A  186  LEU A  204  1                                  19    
HELIX   10  10 ASP A  209  LEU A  228  1                                  20    
HELIX   11  11 PRO A  231  LYS A  236  5                                   6    
HELIX   12  12 ILE A  237  LEU A  240  5                                   4    
HELIX   13  13 TYR A  241  THR A  268  1                                  28    
HELIX   14  14 LYS A  271  CYS A  275  5                                   5    
HELIX   15  15 ASP A  277  ARG A  288  1                                  12    
HELIX   16  16 THR A  292  HIS A  325  1                                  34    
HELIX   17  17 HIS A  325  GLY A  341  1                                  17    
HELIX   18  18 LYS A  346  ILE A  350  5                                   5    
HELIX   19  19 LEU A  353  GLN A  367  1                                  15    
HELIX   20  20 ASN A  397  GLU A  405  1                                   9    
HELIX   21  21 THR A  414  ALA A  419  5                                   6    
HELIX   22  22 GLY A  439  ARG A  456  1                                  18    
SHEET    1   A 4 PHE A  84  TRP A  88  0                                        
SHEET    2   A 4 GLU A  93  ILE A  97 -1  O  THR A  94   N  VAL A  87           
SHEET    3   A 4 ASN A 393  LEU A 396  1  O  ASN A 393   N  LEU A  95           
SHEET    4   A 4 VAL A 373  LYS A 376 -1  N  VAL A 373   O  LEU A 396           
SHEET    1   B 2 ASP A 381  ILE A 383  0                                        
SHEET    2   B 2 TYR A 386  VAL A 388 -1  O  VAL A 388   N  ASP A 381           
SHEET    1   C 2 PHE A 458  THR A 462  0                                        
SHEET    2   C 2 MET A 490  PRO A 494 -1  O  THR A 493   N  HIS A 459           
SHEET    1   D 2 LYS A 473  HIS A 475  0                                        
SHEET    2   D 2 LEU A 479  PRO A 481 -1  O  HIS A 480   N  ILE A 474           
LINK         SG  CYS A 437                FE   HEM A 600     1555   1555  2.40  
SITE     1 AC1 18 ARG A 115  ILE A 132  ILE A 133  TRP A 141                    
SITE     2 AC1 18 ARG A 145  ALA A 306  THR A 310  SER A 314                    
SITE     3 AC1 18 MET A 364  VAL A 373  ARG A 375  PHE A 430                    
SITE     4 AC1 18 ARG A 435  GLY A 436  CYS A 437  MET A 446                    
SITE     5 AC1 18 MET A 447  ASD A 601                                          
SITE     1 AC2 10 ARG A 115  TRP A 224  ALA A 306  ASP A 309                    
SITE     2 AC2 10 THR A 310  VAL A 370  LEU A 372  MET A 374                    
SITE     3 AC2 10 LEU A 477  HEM A 600                                          
SITE     1 AC3  3 SER A  72  ASN A  75  HIS A 475                               
SITE     1 AC4  3 HIS A 109  ASN A 110  HIS A 111                               
CRYST1  140.208  140.208  119.266  90.00  90.00 120.00 P 32 2 1      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      0.007132  0.004118  0.000000        0.00000                         
SCALE2      0.000000  0.008236  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.008385        0.00000