HEADER    TRANSPORT PROTEIN                       04-AUG-04   1U7S              
TITLE     CRYSTAL STRUCTURE OF NATIVE SPERM WHALE MYOGLOBIN FROM LOW IONIC      
TITLE    2 STRENGTH ENVIROMENT (FORM 1)                                         
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: MYOGLOBIN;                                                 
COMPND   3 CHAIN: A                                                             
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: PHYSETER CATODON;                               
SOURCE   3 ORGANISM_COMMON: SPERM WHALE;                                        
SOURCE   4 ORGANISM_TAXID: 9755;                                                
SOURCE   5 TISSUE: SKELETON                                                     
KEYWDS    SPERM WHALE MYOGLOBIN LOW IONIC STRENGTH, TRANSPORT PROTEIN           
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    W.ZHANG,G.N.PHILLIPS JR.                                              
REVDAT   5   14-FEB-24 1U7S    1       REMARK LINK                              
REVDAT   4   30-JAN-13 1U7S    1       AUTHOR JRNL   VERSN                      
REVDAT   3   24-FEB-09 1U7S    1       VERSN                                    
REVDAT   2   18-NOV-08 1U7S    1       JRNL                                     
REVDAT   1   19-JUL-05 1U7S    0                                                
JRNL        AUTH   D.A.KONDRASHOV,W.ZHANG,R.ARANDA,B.STEC,G.N.PHILLIPS JR.      
JRNL        TITL   SAMPLING OF THE NATIVE CONFORMATIONAL ENSEMBLE OF MYOGLOBIN  
JRNL        TITL 2 VIA STRUCTURES IN DIFFERENT CRYSTALLINE ENVIRONMENTS.        
JRNL        REF    PROTEINS                      V.  70   353 2008              
JRNL        REFN                   ISSN 0887-3585                               
JRNL        PMID   17680690                                                     
JRNL        DOI    10.1002/PROT.21499                                           
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.40 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : SHELXL-97                                            
REMARK   3   AUTHORS     : G.M.SHELDRICK                                        
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.40                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 30.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 100.0                          
REMARK   3   CROSS-VALIDATION METHOD           : FREE R                         
REMARK   3   FREE R VALUE TEST SET SELECTION   : RANDOM                         
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT (NO CUTOFF).                         
REMARK   3   R VALUE   (WORKING + TEST SET, NO CUTOFF) : 0.153                  
REMARK   3   R VALUE          (WORKING SET, NO CUTOFF) : 0.143                  
REMARK   3   FREE R VALUE                  (NO CUTOFF) : 0.179                  
REMARK   3   FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : 5.300                  
REMARK   3   FREE R VALUE TEST SET COUNT   (NO CUTOFF) : 2790                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (NO CUTOFF) : 52928                  
REMARK   3                                                                      
REMARK   3  FIT/AGREEMENT OF MODEL FOR DATA WITH F>4SIG(F).                     
REMARK   3   R VALUE   (WORKING + TEST SET, F>4SIG(F)) : 0.146                  
REMARK   3   R VALUE          (WORKING SET, F>4SIG(F)) : 0.137                  
REMARK   3   FREE R VALUE                  (F>4SIG(F)) : 0.172                  
REMARK   3   FREE R VALUE TEST SET SIZE (%, F>4SIG(F)) : 5.300                  
REMARK   3   FREE R VALUE TEST SET COUNT   (F>4SIG(F)) : 2364                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (F>4SIG(F)) : 44875                  
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS      : 1211                                          
REMARK   3   NUCLEIC ACID ATOMS : 0                                             
REMARK   3   HETEROGEN ATOMS    : 43                                            
REMARK   3   SOLVENT ATOMS      : 203                                           
REMARK   3                                                                      
REMARK   3  MODEL REFINEMENT.                                                   
REMARK   3   OCCUPANCY SUM OF NON-HYDROGEN ATOMS      : 1429.0                  
REMARK   3   OCCUPANCY SUM OF HYDROGEN ATOMS          : 0.00                    
REMARK   3   NUMBER OF DISCRETELY DISORDERED RESIDUES : 0                       
REMARK   3   NUMBER OF LEAST-SQUARES PARAMETERS       : 13108                   
REMARK   3   NUMBER OF RESTRAINTS                     : 15983                   
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM RESTRAINT TARGET VALUES.                        
REMARK   3   BOND LENGTHS                         (A) : 0.016                   
REMARK   3   ANGLE DISTANCES                      (A) : 0.035                   
REMARK   3   SIMILAR DISTANCES (NO TARGET VALUES) (A) : 0.011                   
REMARK   3   DISTANCES FROM RESTRAINT PLANES      (A) : 0.027                   
REMARK   3   ZERO CHIRAL VOLUMES               (A**3) : 0.072                   
REMARK   3   NON-ZERO CHIRAL VOLUMES           (A**3) : 0.079                   
REMARK   3   ANTI-BUMPING DISTANCE RESTRAINTS     (A) : 0.017                   
REMARK   3   RIGID-BOND ADP COMPONENTS         (A**2) : 0.005                   
REMARK   3   SIMILAR ADP COMPONENTS            (A**2) : 0.067                   
REMARK   3   APPROXIMATELY ISOTROPIC ADPS      (A**2) : 0.096                   
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED: NULL                                                  
REMARK   3                                                                      
REMARK   3  STEREOCHEMISTRY TARGET VALUES : ENGH AND HUBER                      
REMARK   3   SPECIAL CASE: NULL                                                 
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: ANISOTROPIC REFINEMENT REDUCED FREE R     
REMARK   3  (NO CUTOFF)                                                         
REMARK   4                                                                      
REMARK   4 1U7S COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 11-AUG-04.                  
REMARK 100 THE DEPOSITION ID IS D_1000023352.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 01-JAN-00                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 4.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : APS                                
REMARK 200  BEAMLINE                       : 14-BM-D                            
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1                                  
REMARK 200  MONOCHROMATOR                  : GRAPHITE                           
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 4                     
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : HKL-2000                           
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 55728                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.400                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 30.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : -1000.0                            
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 96.0                               
REMARK 200  DATA REDUNDANCY                : NULL                               
REMARK 200  R MERGE                    (I) : 0.04100                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 14.5000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.40                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.45                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 82.5                               
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: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: SHELX                                                 
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 40.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.60                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 50MM CITRIC ACID PH 4.5, WITH 100MM      
REMARK 280  KCL, 14% PEG1550, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 277K   
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 61 2 2                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -Y,X-Y,Z+1/3                                            
REMARK 290       3555   -X+Y,-X,Z+2/3                                           
REMARK 290       4555   -X,-Y,Z+1/2                                             
REMARK 290       5555   Y,-X+Y,Z+5/6                                            
REMARK 290       6555   X-Y,X,Z+1/6                                             
REMARK 290       7555   Y,X,-Z+1/3                                              
REMARK 290       8555   X-Y,-Y,-Z                                               
REMARK 290       9555   -X,-X+Y,-Z+2/3                                          
REMARK 290      10555   -Y,-X,-Z+5/6                                            
REMARK 290      11555   -X+Y,Y,-Z+1/2                                           
REMARK 290      12555   X,X-Y,-Z+1/6                                            
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       32.23667            
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       64.47333            
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       48.35500            
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       80.59167            
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       16.11833            
REMARK 290   SMTRY1   7 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   7  0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000       32.23667            
REMARK 290   SMTRY1   8  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   8  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   8  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   9 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   9 -0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   9  0.000000  0.000000 -1.000000       64.47333            
REMARK 290   SMTRY1  10  0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  10 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3  10  0.000000  0.000000 -1.000000       80.59167            
REMARK 290   SMTRY1  11 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2  11  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3  11  0.000000  0.000000 -1.000000       48.35500            
REMARK 290   SMTRY1  12  0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  12  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3  12  0.000000  0.000000 -1.000000       16.11833            
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 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 A1014  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A1127  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A1201  LIES ON A SPECIAL POSITION.                          
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     LYS A  96    CD   CE   NZ                                        
REMARK 470     LYS A 145    CD   CE   NZ                                        
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  20   CB  -  CG  -  OD1 ANGL. DEV. =   5.9 DEGREES          
REMARK 500    ASP A  44   CB  -  CG  -  OD1 ANGL. DEV. =   7.4 DEGREES          
REMARK 500    GLY A  80   C   -  N   -  CA  ANGL. DEV. = -14.3 DEGREES          
REMARK 500    TYR A 103   CB  -  CG  -  CD2 ANGL. DEV. =  -4.2 DEGREES          
REMARK 500    ARG A 118   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.4 DEGREES          
REMARK 500    PRO A 120   O   -  C   -  N   ANGL. DEV. = -11.0 DEGREES          
REMARK 500    GLY A 121   C   -  N   -  CA  ANGL. DEV. = -13.9 DEGREES          
REMARK 500    PHE A 138   CB  -  CG  -  CD2 ANGL. DEV. =   5.3 DEGREES          
REMARK 500    TYR A 146   CB  -  CG  -  CD2 ANGL. DEV. =  -5.5 DEGREES          
REMARK 500    TYR A 146   CB  -  CG  -  CD1 ANGL. DEV. =   6.6 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    ASP A  20       76.47   -158.86                                   
REMARK 500    HIS A  81       62.38   -105.40                                   
REMARK 500    ASP A 122       26.51   -140.35                                   
REMARK 500    PHE A 123       80.16   -153.52                                   
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 154  FE                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HIS A  93   NE2                                                    
REMARK 620 2 HEM A 154   NA   92.3                                              
REMARK 620 3 HEM A 154   NB   91.1  89.0                                        
REMARK 620 4 HEM A 154   NC   92.6 175.0  90.1                                  
REMARK 620 5 HEM A 154   ND   91.6  90.4 177.2  90.3                            
REMARK 620 6 HOH A1001   O   178.9  88.7  89.1  86.4  88.2                      
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 154                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1U7R   RELATED DB: PDB                                   
DBREF  1U7S A    1   153  UNP    P02185   MYG_PHYCA        1    153             
SEQRES   1 A  153  VAL LEU SER GLU GLY GLU TRP GLN LEU VAL LEU HIS VAL          
SEQRES   2 A  153  TRP ALA LYS VAL GLU ALA ASP VAL ALA GLY HIS GLY GLN          
SEQRES   3 A  153  ASP ILE LEU ILE ARG LEU PHE LYS SER HIS PRO GLU THR          
SEQRES   4 A  153  LEU GLU LYS PHE ASP ARG PHE LYS HIS LEU LYS THR GLU          
SEQRES   5 A  153  ALA GLU MET LYS ALA SER GLU ASP LEU LYS LYS HIS GLY          
SEQRES   6 A  153  VAL THR VAL LEU THR ALA LEU GLY ALA ILE LEU LYS LYS          
SEQRES   7 A  153  LYS GLY HIS HIS GLU ALA GLU LEU LYS PRO LEU ALA GLN          
SEQRES   8 A  153  SER HIS ALA THR LYS HIS LYS ILE PRO ILE LYS TYR LEU          
SEQRES   9 A  153  GLU PHE ILE SER GLU ALA ILE ILE HIS VAL LEU HIS SER          
SEQRES  10 A  153  ARG HIS PRO GLY ASP PHE GLY ALA ASP ALA GLN GLY ALA          
SEQRES  11 A  153  MET ASN LYS ALA LEU GLU LEU PHE ARG LYS ASP ILE ALA          
SEQRES  12 A  153  ALA LYS TYR LYS GLU LEU GLY TYR GLN GLY                      
HET    HEM  A 154      43                                                       
HETNAM     HEM PROTOPORPHYRIN IX CONTAINING FE                                  
HETSYN     HEM HEME                                                             
FORMUL   2  HEM    C34 H32 FE N4 O4                                             
FORMUL   3  HOH   *203(H2 O)                                                    
HELIX    1   1 SER A    3  GLU A   18  1                                  16    
HELIX    2   2 ASP A   20  HIS A   36  1                                  17    
HELIX    3   3 PRO A   37  PHE A   43  5                                   7    
HELIX    4   4 THR A   51  SER A   58  1                                   8    
HELIX    5   5 SER A   58  LYS A   78  1                                  21    
HELIX    6   6 HIS A   82  LYS A   96  1                                  15    
HELIX    7   7 PRO A  100  HIS A  119  1                                  20    
HELIX    8   8 GLY A  124  GLY A  150  1                                  27    
LINK         NE2 HIS A  93                FE   HEM A 154     1555   1555  2.10  
LINK        FE   HEM A 154                 O   HOH A1001     1555   1555  2.16  
SITE     1 AC1 22 THR A  39  LYS A  42  PHE A  43  ARG A  45                    
SITE     2 AC1 22 LYS A  63  HIS A  64  VAL A  68  ALA A  71                    
SITE     3 AC1 22 LEU A  89  SER A  92  HIS A  93  HIS A  97                    
SITE     4 AC1 22 ILE A  99  TYR A 103  HOH A1001  HOH A1041                    
SITE     5 AC1 22 HOH A1044  HOH A1063  HOH A1078  HOH A1079                    
SITE     6 AC1 22 HOH A1089  HOH A1191                                          
CRYST1   73.730   73.730   96.710  90.00  90.00 120.00 P 61 2 2     12          
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      0.013563  0.007831  0.000000        0.00000                         
SCALE2      0.000000  0.015661  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.010340        0.00000