HEADER    OXIDOREDUCTASE                          16-DEC-05   2CA3              
TITLE     SULFITE DEHYDROGENASE FROM STARKEYA NOVELLA R55M MUTANT               
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: SULFITE\:CYTOCHROME C OXIDOREDUCTASE SUBUNIT A;            
COMPND   3 CHAIN: A;                                                            
COMPND   4 ENGINEERED: YES;                                                     
COMPND   5 MUTATION: YES;                                                       
COMPND   6 MOL_ID: 2;                                                           
COMPND   7 MOLECULE: SULFITE\:CYTOCHROME C OXIDOREDUCTASE SUBUNIT B;            
COMPND   8 CHAIN: B;                                                            
COMPND   9 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: THIOBACILLUS NOVELLUS;                          
SOURCE   3 ORGANISM_TAXID: 921;                                                 
SOURCE   4 EXPRESSION_SYSTEM: RHODOBACTER CAPSULATUS;                           
SOURCE   5 EXPRESSION_SYSTEM_TAXID: 1061;                                       
SOURCE   6 MOL_ID: 2;                                                           
SOURCE   7 ORGANISM_SCIENTIFIC: THIOBACILLUS NOVELLUS;                          
SOURCE   8 ORGANISM_TAXID: 921;                                                 
SOURCE   9 EXPRESSION_SYSTEM: RHODOBACTER CAPSULATUS;                           
SOURCE  10 EXPRESSION_SYSTEM_TAXID: 1061                                        
KEYWDS    SULFITE OXIDASE, MOLYBDOPTERIN, C-TYPE CYTOCHROME, HEME, MUTANT,      
KEYWDS   2 OXIDOREDUCTASE                                                       
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    S.BAILEY,U.KAPPLER,C.FENG,M.J.HONEYCHURCH,P.V.BERNHARDT,G.TOLLIN,     
AUTHOR   2 J.H.ENEMARK                                                          
REVDAT   6   16-OCT-24 2CA3    1       REMARK                                   
REVDAT   5   13-DEC-23 2CA3    1       REMARK LINK                              
REVDAT   4   25-SEP-19 2CA3    1       JRNL   REMARK LINK                       
REVDAT   3   29-SEP-09 2CA3    1       AUTHOR JRNL   REMARK                     
REVDAT   2   24-FEB-09 2CA3    1       VERSN                                    
REVDAT   1   20-FEB-07 2CA3    0                                                
JRNL        AUTH   S.BAILEY,T.RAPSON,K.JOHNSON-WINTERS,A.V.ASTASHKIN,           
JRNL        AUTH 2 J.H.ENEMARK,U.KAPPLER                                        
JRNL        TITL   MOLECULAR BASIS FOR ENZYMATIC SULFITE OXIDATION: HOW THREE   
JRNL        TITL 2 CONSERVED ACTIVE SITE RESIDUES SHAPE ENZYME ACTIVITY.        
JRNL        REF    J.BIOL.CHEM.                  V. 284  2053 2009              
JRNL        REFN                   ISSN 0021-9258                               
JRNL        PMID   19004819                                                     
JRNL        DOI    10.1074/JBC.M807718200                                       
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   U.KAPPLER,S.BAILEY                                           
REMARK   1  TITL   MOLECULAR BASIS OF INTRAMOLECULAR ELECTRON TRANSFER IN       
REMARK   1  TITL 2 SULFITE-OXIDIZING ENZYMES IS REVEALED BY HIGH RESOLUTION     
REMARK   1  TITL 3 STRUCTURE OF A HETERODIMERIC COMPLEX OF THE CATALYTIC        
REMARK   1  TITL 4 MOLYBDOPTERIN SUBUNIT AND A C-TYPE CYTOCHROME SUBUNIT        
REMARK   1  REF    J.BIOL.CHEM.                  V. 280 24999 2005              
REMARK   1  REFN                   ISSN 0021-9258                               
REMARK   1  PMID   15863498                                                     
REMARK   1  DOI    10.1074/JBC.M503237200                                       
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.00 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.2.0005                                      
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,              
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                             
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : MAXIMUM LIKELIHOOD                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.00                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 20.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : NULL                           
REMARK   3   COMPLETENESS FOR RANGE        (%) : 97.9                           
REMARK   3   NUMBER OF REFLECTIONS             : 32619                          
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) : 0.163                           
REMARK   3   R VALUE            (WORKING SET) : 0.161                           
REMARK   3   FREE R VALUE                     : 0.206                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.100                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1759                            
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 20                           
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.00                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.06                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 2032                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.1910                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 97                           
REMARK   3   BIN FREE R VALUE                    : 0.2470                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 3452                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 79                                      
REMARK   3   SOLVENT ATOMS            : 354                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 21.81                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : -0.26000                                             
REMARK   3    B22 (A**2) : -0.93000                                             
REMARK   3    B33 (A**2) : 1.19000                                              
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.157         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.146         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.093         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 3.291         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.960                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.937                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  3635 ; 0.012 ; 0.022       
REMARK   3   BOND LENGTHS OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  4981 ; 1.395 ; 2.013       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   452 ; 6.170 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):   150 ;33.377 ;24.400       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):   536 ;12.637 ;15.000       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):    18 ;16.523 ;15.000       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   531 ; 0.093 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  2826 ; 0.005 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):  1629 ; 0.213 ; 0.200       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  2480 ; 0.305 ; 0.200       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):   296 ; 0.160 ; 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):    41 ; 0.185 ; 0.200       
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):    15 ; 0.408 ; 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):  2326 ; 3.800 ; 2.000       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  3644 ; 4.571 ; 3.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  1532 ; 4.557 ; 2.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  1335 ; 5.836 ; 3.000       
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 : BABINET MODEL WITH 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 2CA3 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 16-DEC-05.                  
REMARK 100 THE DEPOSITION ID IS D_1290026871.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 04-NOV-05                          
REMARK 200  TEMPERATURE           (KELVIN) : 100.0                              
REMARK 200  PH                             : 7.40                               
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : SRS                                
REMARK 200  BEAMLINE                       : PX10.1                             
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.074                              
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : MARRESEARCH                        
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : HKL-2000                           
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 34463                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.000                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 50.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 98.2                               
REMARK 200  DATA REDUNDANCY                : 3.800                              
REMARK 200  R MERGE                    (I) : 0.09500                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 14.3000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.00                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.07                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 89.1                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 2.70                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.29000                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 3.800                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: NULL                                                  
REMARK 200 STARTING MODEL: PDB ENTRY 2BLF                                       
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 46.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.60                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 0.1M HEPES PH 7.4, 2.2M AMMONIUM         
REMARK 280  SULFATE, 2% PEG200, PH 7.40                                         
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 2                        
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       48.82700            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       46.66050            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       48.82700            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       46.66050            
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: DIMERIC                           
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC                    
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 5220 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 18740 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -81.2 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B                                  
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 400                                                                      
REMARK 400 COMPOUND                                                             
REMARK 400 ENGINEERED RESIDUE IN CHAIN A, ARG 87 TO MET                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT                     
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT.                            
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI           DISTANCE          
REMARK 500   O    HOH A  2105     O    HOH B  2050              2.03            
REMARK 500   O    HOH A  2077     O    HOH A  2158              2.11            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS                                             
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC             
REMARK 500 SYMMETRY ARE IN CLOSE CONTACT.  AN ATOM LOCATED WITHIN 0.15          
REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A           
REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375             
REMARK 500 INSTEAD OF REMARK 500.  ATOMS WITH NON-BLANK ALTERNATE               
REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS.            
REMARK 500                                                                      
REMARK 500 DISTANCE CUTOFF:                                                     
REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS              
REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS                  
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI  SSYMOP   DISTANCE          
REMARK 500   O    HOH A  2201     O    HOH A  2201     2655     1.52            
REMARK 500   O    HOH A  2049     O    HOH A  2049     2655     1.99            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    ARG A 237   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.7 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   2       25.37   -148.54                                   
REMARK 500    PRO A   7       49.36    -78.09                                   
REMARK 500    LEU A  27      -60.16    -92.38                                   
REMARK 500    ALA A 122     -145.83    -79.01                                   
REMARK 500    ALA A 125       56.29    -94.10                                   
REMARK 500    ASN A 259     -114.13   -144.56                                   
REMARK 500    ASN A 363       21.37   -150.86                                   
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                             MSS A1374  MOM1                          
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 CYS A 104   SG                                                     
REMARK 620 2 MSS A1374   S1' 139.5                                              
REMARK 620 3 MSS A1374   S2'  95.9  85.0                                        
REMARK 620 4 MSS A1374   OM1 113.2 102.8 114.7                                  
REMARK 620 N                    1     2     3                                   
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                             HEC B1582  FE                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HIS B 533   NE2                                                    
REMARK 620 2 HEC B1582   NA   92.9                                              
REMARK 620 3 HEC B1582   NB   94.0  88.8                                        
REMARK 620 4 HEC B1582   NC   90.4 176.7  91.3                                  
REMARK 620 5 HEC B1582   ND   86.7  88.7 177.5  91.1                            
REMARK 620 6 MET B 557   SD  172.9  91.4  91.7  85.3  87.8                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 700                                                                      
REMARK 700 SHEET                                                                
REMARK 700 THE SHEET STRUCTURE OF THIS MOLECULE IS BIFURCATED. IN               
REMARK 700 ORDER TO REPRESENT THIS FEATURE IN THE SHEET RECORDS BELOW,          
REMARK 700 TWO SHEETS ARE DEFINED.                                              
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 1375                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 1376                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MSS A 1374                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HEC B 1582                
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 2BLF   RELATED DB: PDB                                   
REMARK 900 SULFITE DEHYDROGENASE FROM STARKEYA NOVELLA                          
REMARK 900 RELATED ID: 2BPB   RELATED DB: PDB                                   
REMARK 900 SULFITE DEHYDROGENASE FROM STARKEYA NOVELLA                          
REMARK 900 RELATED ID: 2C9X   RELATED DB: PDB                                   
REMARK 900 SULFITE DEHYDROGENASE FROM STARKEYA NOVELLA Y236F MUTANT             
REMARK 999                                                                      
REMARK 999 SEQUENCE                                                             
REMARK 999 THE TRANSLATED SEQUENCES FOR CHAINS A AND B INCLUDE SIGNAL           
REMARK 999 PEPTIDES WHICH ARE NOT PART OF THE ACTIVE, PROCESSED                 
REMARK 999 PROTEIN. THE SEQUENCES OF THE SIGNAL PEPTIDES                        
REMARK 999  ARE  CHAIN A MLNNRRQILKSAGAAALGLGAGTLGWPGRHAFA                      
REMARK 999        CHAIN B MKRHNARTLAFSVVLGLSAAFAGSGLA R55                       
DBREF  2CA3 A    1   373  UNP    Q9LA16   Q9LA16_THINO    33    405             
DBREF  2CA3 B  501   581  UNP    Q9LA15   Q9LA15_THINO    28    108             
SEQADV 2CA3 MET A   55  UNP  Q9LA16    ARG    87 ENGINEERED MUTATION            
SEQRES   1 A  373  ALA ASP THR VAL THR LEU PRO PHE ALA ASN GLY GLU ARG          
SEQRES   2 A  373  PRO LEU VAL MET TYR PRO GLY LYS ARG PRO LEU ILE GLY          
SEQRES   3 A  373  LEU THR ALA ARG PRO PRO GLN LEU GLU THR PRO PHE SER          
SEQRES   4 A  373  VAL PHE ASP GLU GLY LEU ILE THR PRO ASN ASP ALA PHE          
SEQRES   5 A  373  PHE VAL MET TYR HIS LEU ALA GLY ILE PRO LEU GLU ILE          
SEQRES   6 A  373  ASP PRO ASP ALA PHE ARG LEU GLU ILE LYS GLY LYS VAL          
SEQRES   7 A  373  GLY THR PRO LEU SER LEU SER LEU GLN ASP LEU LYS ASN          
SEQRES   8 A  373  ASP PHE PRO ALA SER GLU VAL VAL ALA VAL ASN GLN CYS          
SEQRES   9 A  373  SER GLY ASN SER ARG GLY PHE VAL GLU PRO ARG VAL GLY          
SEQRES  10 A  373  GLY GLY GLN LEU ALA ASN GLY ALA MET GLY ASN ALA ARG          
SEQRES  11 A  373  TRP ARG GLY VAL PRO LEU LYS ALA VAL LEU GLU LYS ALA          
SEQRES  12 A  373  GLY VAL GLN ALA GLY ALA LYS GLN VAL THR PHE GLY GLY          
SEQRES  13 A  373  LEU ASP GLY PRO VAL ILE PRO GLU THR PRO ASP PHE VAL          
SEQRES  14 A  373  LYS ALA LEU SER ILE ASP HIS ALA THR ASP GLY GLU VAL          
SEQRES  15 A  373  MET LEU ALA TYR SER MET ASN GLY ALA ASP LEU PRO TRP          
SEQRES  16 A  373  LEU ASN GLY TYR PRO LEU ARG LEU VAL VAL PRO GLY TYR          
SEQRES  17 A  373  TYR GLY THR TYR TRP VAL LYS HIS LEU ASN GLU ILE THR          
SEQRES  18 A  373  VAL ILE ASP LYS GLU PHE ASP GLY PHE TRP MET LYS THR          
SEQRES  19 A  373  ALA TYR ARG ILE PRO ASP ASN ALA CYS ALA CYS THR GLU          
SEQRES  20 A  373  PRO GLY LYS ALA PRO THR ALA THR ILE PRO ILE ASN ARG          
SEQRES  21 A  373  PHE ASP VAL ARG SER PHE ILE THR ASN VAL GLU ASN GLY          
SEQRES  22 A  373  ALA SER VAL LYS ALA GLY GLU VAL PRO LEU ARG GLY ILE          
SEQRES  23 A  373  ALA PHE ASP GLY GLY TYR GLY ILE THR GLN VAL SER VAL          
SEQRES  24 A  373  SER ALA ASP ALA GLY LYS SER TRP THR ASN ALA THR LEU          
SEQRES  25 A  373  ASP PRO GLY LEU GLY LYS TYR SER PHE ARG GLY TRP LYS          
SEQRES  26 A  373  ALA VAL LEU PRO LEU THR LYS GLY ASP HIS VAL LEU MET          
SEQRES  27 A  373  CYS ARG ALA THR ASN ALA ARG GLY GLU THR GLN PRO MET          
SEQRES  28 A  373  GLN ALA THR TRP ASN PRO ALA GLY TYR MET ARG ASN VAL          
SEQRES  29 A  373  VAL GLU ALA THR ARG VAL ILE ALA ALA                          
SEQRES   1 B   81  ALA PRO LEU THR TYR GLU LEU PRO ASP GLU THR ALA GLN          
SEQRES   2 B   81  LEU LYS PRO ALA PRO GLN PRO GLY PHE GLU ALA ALA GLN          
SEQRES   3 B   81  ASN ASN CYS ALA ALA CYS HIS SER VAL ASP TYR ILE ASN          
SEQRES   4 B   81  THR GLN PRO PRO GLY LYS GLY GLN ALA PHE TRP ASP ALA          
SEQRES   5 B   81  GLU VAL GLN LYS MET ILE LYS VAL TYR HIS ALA PRO VAL          
SEQRES   6 B   81  ASP GLU ALA ASP ALA LYS ALA ILE ALA ASP TYR LEU ALA          
SEQRES   7 B   81  LYS THR TYR                                                  
HET    MSS  A1374      26                                                       
HET    SO4  A1375       5                                                       
HET    SO4  A1376       5                                                       
HET    HEC  B1582      47                                                       
HETNAM     MSS (MOLYBDOPTERIN-S,S)-OXO-MOLYBDENUM                               
HETNAM     SO4 SULFATE ION                                                      
HETNAM     HEC HEME C                                                           
FORMUL   3  MSS    C10 H12 MO N5 O7 P S2                                        
FORMUL   4  SO4    2(O4 S 2-)                                                   
FORMUL   6  HEC    C34 H34 FE N4 O4                                             
FORMUL   7  HOH   *354(H2 O)                                                    
HELIX    1   1 PRO A   37  GLU A   43  5                                   7    
HELIX    2   2 PRO A   48  PHE A   52  5                                   5    
HELIX    3   3 SER A   85  PHE A   93  1                                   9    
HELIX    4   4 SER A  108  VAL A  112  5                                   5    
HELIX    5   5 LEU A  136  GLY A  144  1                                   9    
HELIX    6   6 ILE A  174  THR A  178  1                                   5    
HELIX    7   7 PRO A  194  GLY A  198  5                                   5    
HELIX    8   8 TYR A  209  TRP A  213  5                                   5    
HELIX    9   9 GLY A  229  THR A  234  1                                   6    
HELIX   10  10 PRO B  520  CYS B  529  1                                  10    
HELIX   11  11 VAL B  535  THR B  540  1                                   6    
HELIX   12  12 GLY B  546  VAL B  560  1                                  15    
HELIX   13  13 ASP B  566  TYR B  581  1                                  16    
SHEET    1  AA 4 THR A   3  THR A   5  0                                        
SHEET    2  AA 4 GLU A  12  VAL A  16 -1  O  ARG A  13   N  VAL A   4           
SHEET    3  AA 4 LEU A  24  THR A  28 -1  O  LEU A  24   N  VAL A  16           
SHEET    4  AA 4 GLN A  33  GLU A  35 -1  O  GLN A  33   N  LEU A  27           
SHEET    1  AB 2 GLU A  64  ILE A  65  0                                        
SHEET    2  AB 2 LEU B 503  THR B 504 -1  O  LEU B 503   N  ILE A  65           
SHEET    1  AC 5 LEU A  82  LEU A  84  0                                        
SHEET    2  AC 5 LEU A  72  GLY A  76 -1  O  LEU A  72   N  LEU A  84           
SHEET    3  AC 5 LEU A 217  ILE A 223  1  O  ASN A 218   N  GLU A  73           
SHEET    4  AC 5 GLN A 151  GLY A 156 -1  O  GLN A 151   N  ILE A 223           
SHEET    5  AC 5 VAL A 169  SER A 173 -1  O  LYS A 170   N  PHE A 154           
SHEET    1  AD 4 SER A  96  GLN A 103  0                                        
SHEET    2  AD 4 MET A 126  PRO A 135 -1  O  GLY A 127   N  ASN A 102           
SHEET    3  AD 4 MET A 183  MET A 188 -1  O  LEU A 184   N  VAL A 134           
SHEET    4  AD 4 ARG A 202  VAL A 204 -1  O  ARG A 202   N  ALA A 185           
SHEET    1  AE 4 SER A  96  GLN A 103  0                                        
SHEET    2  AE 4 MET A 126  PRO A 135 -1  O  GLY A 127   N  ASN A 102           
SHEET    3  AE 4 MET A 183  MET A 188 -1  O  LEU A 184   N  VAL A 134           
SHEET    4  AE 4 ALA A 191  ASP A 192 -1  O  ALA A 191   N  MET A 188           
SHEET    1  AF 2 ARG A 237  PRO A 239  0                                        
SHEET    2  AF 2 THR A 255  PRO A 257 -1  O  ILE A 256   N  ILE A 238           
SHEET    1  AG 4 ARG A 264  ILE A 267  0                                        
SHEET    2  AG 4 GLY A 279  PHE A 288 -1  O  ILE A 286   N  PHE A 266           
SHEET    3  AG 4 ARG A 322  LEU A 330 -1  O  ARG A 322   N  ALA A 287           
SHEET    4  AG 4 THR A 311  LEU A 312 -1  O  THR A 311   N  LYS A 325           
SHEET    1  AH 5 ALA A 274  LYS A 277  0                                        
SHEET    2  AH 5 GLU A 366  ALA A 373  1  O  ILE A 371   N  VAL A 276           
SHEET    3  AH 5 GLY A 333  ASN A 343 -1  O  GLY A 333   N  ALA A 372           
SHEET    4  AH 5 ILE A 294  SER A 300 -1  N  THR A 295   O  THR A 342           
SHEET    5  AH 5 THR A 308  ASN A 309 -1  O  THR A 308   N  VAL A 299           
SSBOND   1 CYS A  243    CYS A  245                          1555   1555  2.06  
LINK         SG  CYS B 529                 CAB HEC B1582     1555   1555  2.00  
LINK         SG  CYS B 532                 CAC HEC B1582     1555   1555  1.95  
LINK         SG  CYS A 104                MOM1 MSS A1374     1555   1555  2.77  
LINK         NE2 HIS B 533                FE   HEC B1582     1555   1555  1.97  
LINK         SD  MET B 557                FE   HEC B1582     1555   1555  2.29  
CISPEP   1 ARG A   30    PRO A   31          0        -5.12                     
CISPEP   2 GLU A  113    PRO A  114          0        -2.08                     
CISPEP   3 TYR A  199    PRO A  200          0        -0.29                     
SITE     1 AC1  9 CYS A 104  SER A 105  GLY A 106  ARG A 109                    
SITE     2 AC1  9 TYR A 236  TYR A 360  MSS A1374  HOH A2269                    
SITE     3 AC1  9 HOH A2270                                                     
SITE     1 AC2  4 GLY A 229  PHE A 230  HOH A2271  HOH A2272                    
SITE     1 AC3 19 PHE A  53  VAL A  54  MET A  55  TYR A  56                    
SITE     2 AC3 19 HIS A  57  ASN A 102  CYS A 104  SER A 105                    
SITE     3 AC3 19 ASP A 158  PHE A 168  ASN A 197  ARG A 202                    
SITE     4 AC3 19 GLY A 210  THR A 211  TRP A 213  VAL A 214                    
SITE     5 AC3 19 LYS A 215  TYR A 236  SO4 A1375                               
SITE     1 AC4 17 GLN A  33  TYR A  56  HIS A  57  ASN B 528                    
SITE     2 AC4 17 CYS B 529  CYS B 532  HIS B 533  TYR B 537                    
SITE     3 AC4 17 ILE B 538  GLN B 541  GLU B 553  LYS B 556                    
SITE     4 AC4 17 MET B 557  TYR B 561  ALA B 563  LEU B 577                    
SITE     5 AC4 17 HOH B2062                                                     
CRYST1   97.654   93.321   56.035  90.00  90.00  90.00 P 21 21 2     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      0.010240  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.010716  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.017846        0.00000