HEADER    TRANSPORT PROTEIN                       31-MAR-04   1SY0              
TITLE     1.15 A CRYSTAL STRUCTURE OF T121V MUTANT OF NITROPHORIN 4 FROM        
TITLE    2 RHODNIUS PROLIXUS                                                    
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: NITROPHORIN 4;                                             
COMPND   3 CHAIN: A;                                                            
COMPND   4 SYNONYM: NP4;                                                        
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: RHODNIUS PROLIXUS;                              
SOURCE   3 ORGANISM_TAXID: 13249;                                               
SOURCE   4 ORGAN: SALIVARY GLAND;                                               
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3);                       
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    LIPOCALIN, BETA BARREL, FERRIC HEME, TRANSPORT PROTEIN                
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    E.M.MAES,A.WEICHSEL,J.F.ANDERSEN,D.SHEPLEY,W.R.MONTFORT               
REVDAT   6   06-NOV-24 1SY0    1       REMARK                                   
REVDAT   5   23-AUG-23 1SY0    1       REMARK                                   
REVDAT   4   27-OCT-21 1SY0    1       REMARK SEQADV LINK                       
REVDAT   3   16-NOV-11 1SY0    1       VERSN  HETATM                            
REVDAT   2   24-FEB-09 1SY0    1       VERSN                                    
REVDAT   1   08-JUN-04 1SY0    0                                                
JRNL        AUTH   E.M.MAES,A.WEICHSEL,J.F.ANDERSEN,D.SHEPLEY,W.R.MONTFORT      
JRNL        TITL   ROLE OF BINDING SITE LOOPS IN CONTROLLING NITRIC OXIDE       
JRNL        TITL 2 RELEASE: STRUCTURE AND KINETICS OF MUTANT FORMS OF           
JRNL        TITL 3 NITROPHORIN 4                                                
JRNL        REF    BIOCHEMISTRY                  V.  43  6679 2004              
JRNL        REFN                   ISSN 0006-2960                               
JRNL        PMID   15157102                                                     
JRNL        DOI    10.1021/BI049748A                                            
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  TITL   LIGAND-INDUCED HEME RUFFLING AND BENT NO GEOMETRY IN         
REMARK   1  TITL 2 ULTRA-HIGH-RESOLUTION STRUCTURES OF NITROPHORIN 4            
REMARK   1  REF    BIOCHEMISTRY                  V.  40 11327 2001              
REMARK   1  REFN                   ISSN 0006-2960                               
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.15 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.1.24                                        
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,              
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                             
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : NULL                                          
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.15                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 21.37                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 95.6                           
REMARK   3   NUMBER OF REFLECTIONS             : 50570                          
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) : 0.143                           
REMARK   3   R VALUE            (WORKING SET) : 0.141                           
REMARK   3   FREE R VALUE                     : 0.172                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.100                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 2727                            
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) : 1.15                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.18                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 3746                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.1300                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 209                          
REMARK   3   BIN FREE R VALUE                    : 0.1550                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 1428                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 44                                      
REMARK   3   SOLVENT ATOMS            : 241                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 5.78                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 8.88                           
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -0.02000                                             
REMARK   3    B22 (A**2) : -0.22000                                             
REMARK   3    B33 (A**2) : 0.22000                                              
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : -0.12000                                             
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.038         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.038         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.020         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 0.407         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.961                         
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):  1564 ; 0.016 ; 0.022       
REMARK   3   BOND LENGTHS OTHERS               (A):  1321 ; 0.002 ; 0.020       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  2136 ; 1.829 ; 2.045       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  3106 ; 1.868 ; 3.000       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   189 ; 7.836 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   225 ; 0.116 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  1743 ; 0.011 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):   293 ; 0.004 ; 0.020       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):   288 ; 0.346 ; 0.200       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  1548 ; 0.253 ; 0.200       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION OTHERS         (A):   915 ; 0.088 ; 0.200       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):   143 ; 0.122 ; 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):    13 ; 0.187 ; 0.200       
REMARK   3   SYMMETRY VDW OTHERS               (A):    50 ; 0.242 ; 0.200       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):    33 ; 0.089 ; 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):   934 ; 1.531 ; 1.500       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  1500 ; 2.347 ; 2.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):   626 ; 2.612 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):   627 ; 3.648 ; 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):  1560 ; 1.473 ; 2.000       
REMARK   3   SPHERICITY; FREE ATOMS         (A**2):   244 ; 5.273 ; 2.000       
REMARK   3   SPHERICITY; BONDED ATOMS       (A**2):  1519 ; 3.241 ; 2.000       
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 : BABINET MODEL WITH MASK                              
REMARK   3   PARAMETERS FOR MASK CALCULATION                                    
REMARK   3   VDW PROBE RADIUS   : 1.40                                          
REMARK   3   ION PROBE RADIUS   : 0.80                                          
REMARK   3   SHRINKAGE RADIUS   : 0.80                                          
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN ADDED IN THE RIDING   
REMARK   3  POSITIONS                                                           
REMARK   4                                                                      
REMARK   4 1SY0 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 06-APR-04.                  
REMARK 100 THE DEPOSITION ID IS D_1000022081.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 03-DEC-02                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 7.5                                
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-C                            
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.900                              
REMARK 200  MONOCHROMATOR                  : BENT GE(111) MONOCHROMATOR         
REMARK 200  OPTICS                         : BENT CONICAL SI-MIRROR (RH         
REMARK 200                                   COATING)                           
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 4                     
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : XDISPLAYF                          
REMARK 200  DATA SCALING SOFTWARE          : D*TREK                             
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 54132                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.150                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 21.370                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 97.1                               
REMARK 200  DATA REDUNDANCY                : 3.190                              
REMARK 200  R MERGE                    (I) : 0.05000                            
REMARK 200  R SYM                      (I) : 0.05000                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 20.8000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.15                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.19                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 98.6                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 2.51                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.13400                            
REMARK 200  R SYM FOR SHELL            (I) : 0.13400                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 6.000                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS            
REMARK 200 SOFTWARE USED: NULL                                                  
REMARK 200 STARTING MODEL: PDB ENTRY 1D2U                                       
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 37.08                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.95                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: AMMONIUM PHOSPHATE 3.2 M, PH 7.5,        
REMARK 280  VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 298K                     
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 1 2 1                          
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,Y,-Z                                                 
REMARK 290       3555   X+1/2,Y+1/2,Z                                           
REMARK 290       4555   -X+1/2,Y+1/2,-Z                                         
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   3  1.000000  0.000000  0.000000       35.15000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       21.38150            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4 -1.000000  0.000000  0.000000       35.15000            
REMARK 290   SMTRY2   4  0.000000  1.000000  0.000000       21.38150            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A                                     
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 375                                                                      
REMARK 375 SPECIAL POSITION                                                     
REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS            
REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL          
REMARK 375 POSITIONS.                                                           
REMARK 375                                                                      
REMARK 375 ATOM RES CSSEQI                                                      
REMARK 375      HOH A 278  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A 486  LIES ON A SPECIAL POSITION.                          
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    CYS A  41   CA  -  CB  -  SG  ANGL. DEV. =   7.2 DEGREES          
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 ARG A   39     TYR A   40                  140.34                    
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 185  FE                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HIS A  59   NE2                                                    
REMARK 620 2 HEM A 185   NA   89.4                                              
REMARK 620 3 HEM A 185   NB   91.2  90.0                                        
REMARK 620 4 HEM A 185   NC   91.5 179.1  89.9                                  
REMARK 620 5 HEM A 185   ND   90.7  90.4 178.1  89.7                            
REMARK 620 6 NH4 A 201   N   178.1  88.9  88.1  90.3  90.0                      
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 NH4 A 201                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HEM A 185                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1D2U   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF WILD-TYPE NITROPHORIN 4 FROM RHODNIUS PROLIXUS  
REMARK 900 RELATED ID: 1SXU   RELATED DB: PDB                                   
REMARK 900 1.36 A CRYSTAL STRUCTURE OF D30N MUTANT OF NITROPHORIN 4 FROM        
REMARK 900 RHODNIUS PROLIXUS COMPLEXED WITH IMIDAZOLE                           
REMARK 900 RELATED ID: 1SXW   RELATED DB: PDB                                   
REMARK 900 1.05 A CRYSTAL STRUCTURE OF D30A MUTANT OF NITROPHORIN 4 FROM        
REMARK 900 RHODNIUS PROLIXUS COMPLEXED WITH NITRIC OXIDE                        
REMARK 900 RELATED ID: 1SXX   RELATED DB: PDB                                   
REMARK 900 1.0 A CRYSTAL STRUCTURE OF D129A/L130A MUTANT OF NITROPHORIN 4       
REMARK 900 COMPLEXED WITH NITRIC OXIDE                                          
REMARK 900 RELATED ID: 1SXY   RELATED DB: PDB                                   
REMARK 900 1.07 A CRYSTAL STRUCTURE OF D30N MUTANT OF NITROPHORIN 4 FROM        
REMARK 900 RHODNIUS PROLIXUS                                                    
REMARK 900 RELATED ID: 1SY1   RELATED DB: PDB                                   
REMARK 900 1.0 A CRYSTAL STRUCTURE OF T121V MUTANT OF NITROPHORIN 4 COMPLEXED   
REMARK 900 WITH NITRIC OXIDE                                                    
REMARK 900 RELATED ID: 1SY2   RELATED DB: PDB                                   
REMARK 900 1.0 A CRYSTAL STRUCTURE OF D129A/L130A MUTANT OF NITROPHORIN 4       
REMARK 900 RELATED ID: 1SY3   RELATED DB: PDB                                   
REMARK 900 1.00 A CRYSTAL STRUCTURE OF D30N MUTANT OF NITROPHORIN 4 FROM        
REMARK 900 RHODNIUS PROLIXUS COMPLEXED WITH NITRIC OXIDE                        
DBREF  1SY0 A    1   184  UNP    Q94734   NP4_RHOPR       22    205             
SEQADV 1SY0 VAL A  121  UNP  Q94734    THR   142 ENGINEERED MUTATION            
SEQRES   1 A  184  ALA CYS THR LYS ASN ALA ILE ALA GLN THR GLY PHE ASN          
SEQRES   2 A  184  LYS ASP LYS TYR PHE ASN GLY ASP VAL TRP TYR VAL THR          
SEQRES   3 A  184  ASP TYR LEU ASP LEU GLU PRO ASP ASP VAL PRO LYS ARG          
SEQRES   4 A  184  TYR CYS ALA ALA LEU ALA ALA GLY THR ALA SER GLY LYS          
SEQRES   5 A  184  LEU LYS GLU ALA LEU TYR HIS TYR ASP PRO LYS THR GLN          
SEQRES   6 A  184  ASP THR PHE TYR ASP VAL SER GLU LEU GLN VAL GLU SER          
SEQRES   7 A  184  LEU GLY LYS TYR THR ALA ASN PHE LYS LYS VAL ASP LYS          
SEQRES   8 A  184  ASN GLY ASN VAL LYS VAL ALA VAL THR ALA GLY ASN TYR          
SEQRES   9 A  184  TYR THR PHE THR VAL MET TYR ALA ASP ASP SER SER ALA          
SEQRES  10 A  184  LEU ILE HIS VAL CYS LEU HIS LYS GLY ASN LYS ASP LEU          
SEQRES  11 A  184  GLY ASP LEU TYR ALA VAL LEU ASN ARG ASN LYS ASP ALA          
SEQRES  12 A  184  ALA ALA GLY ASP LYS VAL LYS SER ALA VAL SER ALA ALA          
SEQRES  13 A  184  THR LEU GLU PHE SER LYS PHE ILE SER THR LYS GLU ASN          
SEQRES  14 A  184  ASN CYS ALA TYR ASP ASN ASP SER LEU LYS SER LEU LEU          
SEQRES  15 A  184  THR LYS                                                      
HET    NH4  A 201       1                                                       
HET    HEM  A 185      43                                                       
HETNAM     NH4 AMMONIUM ION                                                     
HETNAM     HEM PROTOPORPHYRIN IX CONTAINING FE                                  
HETSYN     HEM HEME                                                             
FORMUL   2  NH4    H4 N 1+                                                      
FORMUL   3  HEM    C34 H32 FE N4 O4                                             
FORMUL   4  HOH   *241(H2 O)                                                    
HELIX    1   1 ASN A   13  PHE A   18  1                                   6    
HELIX    2   2 GLY A  146  ALA A  156  1                                  11    
HELIX    3   3 GLU A  159  PHE A  163  5                                   5    
HELIX    4   4 LYS A  167  ASN A  170  5                                   4    
HELIX    5   5 ASP A  174  LEU A  182  1                                   9    
SHEET    1   A 7 VAL A  95  VAL A  97  0                                        
SHEET    2   A 7 LYS A  81  VAL A  89 -1  N  LYS A  88   O  LYS A  96           
SHEET    3   A 7 THR A  67  SER A  78 -1  N  GLU A  77   O  LYS A  81           
SHEET    4   A 7 LYS A  52  TYR A  60 -1  N  LEU A  53   O  LEU A  74           
SHEET    5   A 7 CYS A  41  ALA A  49 -1  N  CYS A  41   O  TYR A  60           
SHEET    6   A 7 ASN A  19  ASP A  30 -1  N  TRP A  23   O  LEU A  44           
SHEET    7   A 7 ILE A 164  SER A 165 -1  O  ILE A 164   N  TYR A  28           
SHEET    1   B 7 VAL A  95  VAL A  97  0                                        
SHEET    2   B 7 LYS A  81  VAL A  89 -1  N  LYS A  88   O  LYS A  96           
SHEET    3   B 7 TYR A 104  ALA A 112 -1  O  TYR A 105   N  ALA A  84           
SHEET    4   B 7 SER A 116  HIS A 124 -1  O  HIS A 124   N  TYR A 104           
SHEET    5   B 7 ASP A 132  ASN A 138 -1  O  LEU A 133   N  VAL A 121           
SHEET    6   B 7 ASN A  19  ASP A  30 -1  N  ASP A  27   O  VAL A 136           
SHEET    7   B 7 ILE A 164  SER A 165 -1  O  ILE A 164   N  TYR A  28           
SSBOND   1 CYS A    2    CYS A  122                          1555   1555  2.05  
SSBOND   2 CYS A   41    CYS A  171                          1555   1555  2.01  
LINK         NE2 HIS A  59                FE   HEM A 185     1555   1555  2.01  
LINK        FE   HEM A 185                 N   NH4 A 201     1555   1555  2.03  
SITE     1 AC1  1 HEM A 185                                                     
SITE     1 AC2 15 VAL A  25  VAL A  36  PRO A  37  TYR A  40                    
SITE     2 AC2 15 LEU A  57  HIS A  59  PHE A  68  ASP A  70                    
SITE     3 AC2 15 PHE A  86  LYS A  88  TYR A 105  LEU A 123                    
SITE     4 AC2 15 LYS A 125  NH4 A 201  HOH A 214                               
CRYST1   70.300   42.763   52.890  90.00  93.66  90.00 C 1 2 1       4          
ORIGX1      1.000000  0.000000  0.000000        0.00000                         
ORIGX2      0.000000  1.000000  0.000000        0.00000                         
ORIGX3      0.000000  0.000000  1.000000        0.00000                         
SCALE1      0.014225  0.000000  0.000911        0.00000                         
SCALE2      0.000000  0.023385  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.018946        0.00000