HEADER    TRANSPORT PROTEIN                       04-JUN-13   4L20              
TITLE     CRYSTAL STRUCTURE OF CIMEX NITROPHORIN A21V MUTANT FERROUS NO COMPLEX 
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: SALIVARY NITROPHORIN;                                      
COMPND   3 CHAIN: A;                                                            
COMPND   4 FRAGMENT: UNP RESIDUES 23-302;                                       
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: CIMEX LECTULARIUS;                              
SOURCE   3 ORGANISM_COMMON: BED BUG;                                            
SOURCE   4 ORGANISM_TAXID: 79782;                                               
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 469008;                                     
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: BL21DE3;                                   
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PET17B                                    
KEYWDS    BETA SANDWICH, FERROUS HEME, THIOLATE HEME LIGAND, S-NITROSOCYSTEINE, 
KEYWDS   2 TRANSPORT PROTEIN                                                    
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    H.B.BADGANDI,A.WEICHSEL,W.R.MONTFORT                                  
REVDAT   3   20-NOV-24 4L20    1       REMARK                                   
REVDAT   2   20-SEP-23 4L20    1       REMARK SEQADV LINK                       
REVDAT   1   04-JUN-14 4L20    0                                                
JRNL        AUTH   H.B.BADGANDI,J.T.HAZZARD,A.WEICHSEL,G.TOLLIN,W.R.MONTFORT    
JRNL        TITL   PROXIMAL CYSTEINE PROTONATION IN CIMEX NITROPHORIN IS KEY TO 
JRNL        TITL 2 EFFICIENT NO TRANSPORT AND RELEASE.                          
JRNL        REF    TO BE PUBLISHED                                              
JRNL        REFN                                                                
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.68 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.7.003                                       
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) : 1.68                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 35.16                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 99.7                           
REMARK   3   NUMBER OF REFLECTIONS             : 28675                          
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) : 0.178                           
REMARK   3   R VALUE            (WORKING SET) : 0.176                           
REMARK   3   FREE R VALUE                     : 0.221                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.100                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1528                            
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) : 1.68                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.72                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 2121                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 100.0                        
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2380                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 97                           
REMARK   3   BIN FREE R VALUE                    : 0.2940                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 2231                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 45                                      
REMARK   3   SOLVENT ATOMS            : 187                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 32.80                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 27.28                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 0.05000                                              
REMARK   3    B22 (A**2) : -0.03000                                             
REMARK   3    B33 (A**2) : 0.00000                                              
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : -0.20000                                             
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.110         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.112         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.074         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 2.175         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.968                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.950                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  2367 ; 0.020 ; 0.020       
REMARK   3   BOND LENGTHS OTHERS               (A):  2195 ; 0.002 ; 0.020       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  3233 ; 1.933 ; 1.981       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  5076 ; 0.939 ; 3.000       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   289 ; 6.970 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):   110 ;38.910 ;25.227       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):   409 ;14.572 ;15.000       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):     9 ;15.932 ;15.000       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   358 ; 0.124 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  2696 ; 0.011 ; 0.021       
REMARK   3   GENERAL PLANES OTHERS             (A):   543 ; 0.004 ; 0.020       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):  NULL ;  NULL ;  NULL       
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):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):  NULL ;  NULL ;  NULL       
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):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  NULL ;  NULL ;  NULL       
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 4L20 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 04-JUN-13.                  
REMARK 100 THE DEPOSITION ID IS D_1000080080.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 23-APR-08                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 5.6                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : SSRL                               
REMARK 200  BEAMLINE                       : BL9-2                              
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.9798                             
REMARK 200  MONOCHROMATOR                  : DIAMOND (111) DOUBLE CRYSTAL       
REMARK 200  OPTICS                         : BENT (SI)-MIRROR                   
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : MARMOSAIC 325 MM CCD               
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : CRYSTALCLEAR                       
REMARK 200  DATA SCALING SOFTWARE          : CRYSTALCLEAR                       
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 30208                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.680                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 40.730                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.8                               
REMARK 200  DATA REDUNDANCY                : 5.240                              
REMARK 200  R MERGE                    (I) : 0.05500                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 13.6000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.68                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.74                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 100.0                              
REMARK 200  DATA REDUNDANCY IN SHELL       : 5.20                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.27700                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 4.200                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS            
REMARK 200 SOFTWARE USED: REFMAC 5.7.003                                        
REMARK 200 STARTING MODEL: 1NTF                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 41.48                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.10                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 4000 , PH 5.6, VAPOR DIFFUSION,      
REMARK 280  HANGING DROP, TEMPERATURE 298K                                      
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,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       20.90700            
REMARK 290   SMTRY3   2  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 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    VAL A  21      124.43    -39.19                                   
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 301  FE                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1  NO A 302   N                                                      
REMARK 620 2 HEM A 301   NA   89.0                                              
REMARK 620 3 HEM A 301   NB   93.6  89.6                                        
REMARK 620 4 HEM A 301   NC   91.7 179.2  90.0                                  
REMARK 620 5 HEM A 301   ND   87.2  91.2 178.9  89.2                            
REMARK 620 6  NO A 302   O    21.9  71.8  80.3 108.8 100.7                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HEM A 301                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NO A 302                  
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1NTF   RELATED DB: PDB                                   
REMARK 900 WILDTYPE PROTEIN                                                     
REMARK 900 RELATED ID: 1Y21   RELATED DB: PDB                                   
REMARK 900 WILDTYPE PROTEIN FERROUS NO COMPLEX                                  
REMARK 900 RELATED ID: 4L21   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4L1Y   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 4L1Z   RELATED DB: PDB                                   
DBREF  4L20 A    3   282  UNP    O76745   O76745_CIMLE    23    302             
SEQADV 4L20 VAL A   21  UNP  O76745    ALA    41 ENGINEERED MUTATION            
SEQRES   1 A  280  PRO PRO ALA GLN LEU SER VAL HIS THR VAL SER TRP ASN          
SEQRES   2 A  280  SER GLY HIS GLU ARG VAL PRO THR ASN LEU GLU GLU LEU          
SEQRES   3 A  280  LEU GLY LEU ASN SER GLY GLU THR PRO ASP VAL ILE ALA          
SEQRES   4 A  280  VAL ALA VAL GLN GLY PHE GLY PHE GLN THR ASP LYS PRO          
SEQRES   5 A  280  GLN GLN GLY PRO ALA SNC VAL LYS ASN PHE GLN SER LEU          
SEQRES   6 A  280  LEU THR SER LYS GLY TYR THR LYS LEU LYS ASN THR ILE          
SEQRES   7 A  280  THR GLU THR MET GLY LEU THR VAL TYR CYS LEU GLU LYS          
SEQRES   8 A  280  HIS LEU ASP GLN ASN THR LEU LYS ASN GLU THR ILE ILE          
SEQRES   9 A  280  VAL THR VAL ASP ASP GLN LYS LYS SER GLY GLY ILE VAL          
SEQRES  10 A  280  THR SER PHE THR ILE TYR ASN LYS ARG PHE SER PHE THR          
SEQRES  11 A  280  THR SER ARG MET SER ASP GLU ASP VAL THR SER THR ASN          
SEQRES  12 A  280  THR LYS TYR ALA TYR ASP THR ARG LEU ASP TYR SER LYS          
SEQRES  13 A  280  LYS ASP ASP PRO SER ASP PHE LEU PHE TRP ILE GLY ASP          
SEQRES  14 A  280  LEU ASN VAL ARG VAL GLU THR ASN ALA THR HIS ALA LYS          
SEQRES  15 A  280  SER LEU VAL ASP GLN ASN ASN ILE ASP GLY LEU MET ALA          
SEQRES  16 A  280  PHE ASP GLN LEU LYS LYS ALA LYS GLU GLN LYS LEU PHE          
SEQRES  17 A  280  ASP GLY TRP THR GLU PRO GLN VAL THR PHE LYS PRO THR          
SEQRES  18 A  280  TYR LYS PHE LYS PRO ASN THR ASP GLU TYR ASP LEU SER          
SEQRES  19 A  280  ALA THR PRO SER TRP THR ASP ARG ALA LEU TYR LYS SER          
SEQRES  20 A  280  GLY THR GLY LYS THR ILE GLN PRO LEU SER TYR ASN SER          
SEQRES  21 A  280  LEU THR ASN TYR LYS GLN THR GLU HIS ARG PRO VAL LEU          
SEQRES  22 A  280  ALA LYS PHE ARG VAL THR LEU                                  
MODRES 4L20 SNC A   60  CYS  S-NITROSO-CYSTEINE                                 
HET    SNC  A  60       8                                                       
HET    HEM  A 301      43                                                       
HET     NO  A 302       2                                                       
HETNAM     SNC S-NITROSO-CYSTEINE                                               
HETNAM     HEM PROTOPORPHYRIN IX CONTAINING FE                                  
HETNAM      NO NITRIC OXIDE                                                     
HETSYN     HEM HEME                                                             
HETSYN      NO NITROGEN MONOXIDE                                                
FORMUL   1  SNC    C3 H6 N2 O3 S                                                
FORMUL   2  HEM    C34 H32 FE N4 O4                                             
FORMUL   3   NO    N O                                                          
FORMUL   4  HOH   *187(H2 O)                                                    
HELIX    1   1 ASN A   24  LEU A   29  1                                   6    
HELIX    2   2 GLN A   56  LYS A   71  1                                  16    
HELIX    3   3 LYS A   93  LEU A   95  5                                   3    
HELIX    4   4 ASP A  151  ASP A  155  5                                   5    
HELIX    5   5 ASN A  179  GLN A  189  1                                  11    
HELIX    6   6 ASN A  191  ALA A  197  1                                   7    
HELIX    7   7 GLN A  200  GLN A  207  1                                   8    
SHEET    1   A 6 TYR A  73  ILE A  80  0                                        
SHEET    2   A 6 MET A  84  LEU A  91 -1  O  CYS A  90   N  THR A  74           
SHEET    3   A 6 VAL A  39  GLY A  46 -1  N  ILE A  40   O  TYR A  89           
SHEET    4   A 6 GLN A   6  GLY A  17  1  N  VAL A  12   O  ALA A  43           
SHEET    5   A 6 VAL A 274  THR A 281 -1  O  VAL A 280   N  LEU A   7           
SHEET    6   A 6 ILE A 255  SER A 262 -1  N  GLN A 256   O  ARG A 279           
SHEET    1   B 5 GLU A 103  THR A 108  0                                        
SHEET    2   B 5 GLY A 116  ILE A 124 -1  O  SER A 121   N  GLU A 103           
SHEET    3   B 5 LYS A 127  ARG A 135 -1  O  PHE A 129   N  PHE A 122           
SHEET    4   B 5 PHE A 165  ASP A 171  1  O  ILE A 169   N  THR A 132           
SHEET    5   B 5 ASP A 243  LYS A 248 -1  O  ARG A 244   N  GLY A 170           
LINK         C   ALA A  59                 N   SNC A  60     1555   1555  1.32  
LINK         C   SNC A  60                 N   VAL A  61     1555   1555  1.33  
LINK        FE   HEM A 301                 N    NO A 302     1555   1555  1.79  
LINK        FE   HEM A 301                 O    NO A 302     1555   1555  2.56  
CISPEP   1 TYR A  224    LYS A  225          0        -3.00                     
SITE     1 AC1 21 GLU A  19  ARG A  20  VAL A  44  GLY A  48                    
SITE     2 AC1 21 PHE A  49  ASP A  52  PRO A  54  GLY A  57                    
SITE     3 AC1 21 SNC A  60  VAL A  61  PHE A  64  GLN A  65                    
SITE     4 AC1 21 LYS A  75  ASN A  78  ILE A  80  THR A  87                    
SITE     5 AC1 21 TYR A  89   NO A 302  HOH A 509  HOH A 518                    
SITE     6 AC1 21 HOH A 587                                                     
SITE     1 AC2  2 VAL A  44  HEM A 301                                          
CRYST1   48.963   41.814   65.241  90.00  94.91  90.00 P 1 21 1      2          
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      0.020424  0.000000  0.001753        0.00000                         
SCALE2      0.000000  0.023915  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.015384        0.00000