PDB Short entry for 1SK1
HEADER    OXIDOREDUCTASE                          04-MAR-04   1SK1              
TITLE     ARSENATE REDUCTASE R60K MUTANT +0.4M ARSENATE FROM E. COLI            
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: ARSENATE REDUCTASE;                                        
COMPND   3 CHAIN: A;                                                            
COMPND   4 SYNONYM: ARSENICAL PUMP MODIFIER;                                    
COMPND   5 EC: 1.20.4.1;                                                        
COMPND   6 ENGINEERED: YES;                                                     
COMPND   7 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                               
SOURCE   3 ORGANISM_TAXID: 562;                                                 
SOURCE   4 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3);                       
SOURCE   5 EXPRESSION_SYSTEM_TAXID: 469008;                                     
SOURCE   6 EXPRESSION_SYSTEM_STRAIN: BL21(DE3)                                  
KEYWDS    ARSC, REDUCTASE, ARSENITE, ARSENATE, OXIDOREDUCTASE                   
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    S.DEMEL,B.F.EDWARDS                                                   
REVDAT   7   24-JUL-19 1SK1    1       REMARK LINK                              
REVDAT   6   29-AUG-18 1SK1    1       COMPND SOURCE                            
REVDAT   5   04-APR-18 1SK1    1       REMARK                                   
REVDAT   4   11-OCT-17 1SK1    1       REMARK                                   
REVDAT   3   13-JUL-11 1SK1    1       VERSN                                    
REVDAT   2   24-FEB-09 1SK1    1       VERSN                                    
REVDAT   1   15-FEB-05 1SK1    0                                                
JRNL        AUTH   S.DEMEL,J.SHI,P.MARTIN,B.P.ROSEN,B.F.EDWARDS                 
JRNL        TITL   ARGININE 60 IN THE ARSC ARSENATE REDUCTASE OF E. COLI        
JRNL        TITL 2 PLASMID R773 DETERMINES THE CHEMICAL NATURE OF THE BOUND     
JRNL        TITL 3 AS(III) PRODUCT.                                             
JRNL        REF    PROTEIN SCI.                  V.  13  2330 2004              
JRNL        REFN                   ISSN 0961-8368                               
JRNL        PMID   15295115                                                     
JRNL        DOI    10.1110/PS.04787204                                          
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.55 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : SHELXL-97                                            
REMARK   3   AUTHORS     : G.M.SHELDRICK                                        
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.55                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 20.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 83.2                           
REMARK   3   CROSS-VALIDATION METHOD           : FREE R                         
REMARK   3   FREE R VALUE TEST SET SELECTION   : RANDOM                         
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT (NO CUTOFF).                         
REMARK   3   R VALUE   (WORKING + TEST SET, NO CUTOFF) : 0.175                  
REMARK   3   R VALUE          (WORKING SET, NO CUTOFF) : 0.176                  
REMARK   3   FREE R VALUE                  (NO CUTOFF) : 0.212                  
REMARK   3   FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE TEST SET COUNT   (NO CUTOFF) : 1604                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (NO CUTOFF) : 31331                  
REMARK   3                                                                      
REMARK   3  FIT/AGREEMENT OF MODEL FOR DATA WITH F>4SIG(F).                     
REMARK   3   R VALUE   (WORKING + TEST SET, F>4SIG(F)) : 0.173                  
REMARK   3   R VALUE          (WORKING SET, F>4SIG(F)) : NULL                   
REMARK   3   FREE R VALUE                  (F>4SIG(F)) : NULL                   
REMARK   3   FREE R VALUE TEST SET SIZE (%, F>4SIG(F)) : NULL                   
REMARK   3   FREE R VALUE TEST SET COUNT   (F>4SIG(F)) : NULL                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (F>4SIG(F)) : 30517                  
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS      : 1088                                          
REMARK   3   NUCLEIC ACID ATOMS : 0                                             
REMARK   3   HETEROGEN ATOMS    : 18                                            
REMARK   3   SOLVENT ATOMS      : 303                                           
REMARK   3                                                                      
REMARK   3  MODEL REFINEMENT.                                                   
REMARK   3   OCCUPANCY SUM OF NON-HYDROGEN ATOMS      : 1426.0                  
REMARK   3   OCCUPANCY SUM OF HYDROGEN ATOMS          : 0.00                    
REMARK   3   NUMBER OF DISCRETELY DISORDERED RESIDUES : 6                       
REMARK   3   NUMBER OF LEAST-SQUARES PARAMETERS       : 5922                    
REMARK   3   NUMBER OF RESTRAINTS                     : 4666                    
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM RESTRAINT TARGET VALUES.                        
REMARK   3   BOND LENGTHS                         (A) : 0.010                   
REMARK   3   ANGLE DISTANCES                      (A) : 0.031                   
REMARK   3   SIMILAR DISTANCES (NO TARGET VALUES) (A) : 0.000                   
REMARK   3   DISTANCES FROM RESTRAINT PLANES      (A) : 0.029                   
REMARK   3   ZERO CHIRAL VOLUMES               (A**3) : 0.055                   
REMARK   3   NON-ZERO CHIRAL VOLUMES           (A**3) : 0.063                   
REMARK   3   ANTI-BUMPING DISTANCE RESTRAINTS     (A) : 0.039                   
REMARK   3   RIGID-BOND ADP COMPONENTS         (A**2) : 0.000                   
REMARK   3   SIMILAR ADP COMPONENTS            (A**2) : 0.064                   
REMARK   3   APPROXIMATELY ISOTROPIC ADPS      (A**2) : 0.000                   
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED: MOEWS & KRETSINGER, J.MOL.BIOL.91(1973)201-228        
REMARK   3                                                                      
REMARK   3  STEREOCHEMISTRY TARGET VALUES : ENGH & HUBER                        
REMARK   3   SPECIAL CASE: NULL                                                 
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1SK1 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 17-MAR-04.                  
REMARK 100 THE DEPOSITION ID IS D_1000021777.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 01-NOV-01                          
REMARK 200  TEMPERATURE           (KELVIN) : 93.0                               
REMARK 200  PH                             : 4.80                               
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : N                                  
REMARK 200  RADIATION SOURCE               : ROTATING ANODE                     
REMARK 200  BEAMLINE                       : NULL                               
REMARK 200  X-RAY GENERATOR MODEL          : RIGAKU RU200                       
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.5418                             
REMARK 200  MONOCHROMATOR                  : OSMIC MIRRORS                      
REMARK 200  OPTICS                         : OSMIC MIRRORS                      
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                        
REMARK 200  DETECTOR MANUFACTURER          : RIGAKU RAXIS IV                    
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : X-GEN                              
REMARK 200  DATA SCALING SOFTWARE          : X-GEN                              
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 32964                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.550                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 20.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : -3.000                             
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 86.3                               
REMARK 200  DATA REDUNDANCY                : 17.90                              
REMARK 200  R MERGE                    (I) : 0.09850                            
REMARK 200  R SYM                      (I) : 0.09850                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 19.0000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.55                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.61                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 35.6                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 5.28                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.44540                            
REMARK 200  R SYM FOR SHELL            (I) : 0.44540                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 1.990                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS            
REMARK 200 SOFTWARE USED: SHELX                                                 
REMARK 200 STARTING MODEL: NATIVE STRUCTURE                                     
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 58.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.93                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 50% SATURATED CESIUM SULFATE, 100MM      
REMARK 280  SODIUM ACETATE,5MM DTT, PH 4.80, VAPOR DIFFUSION, HANGING DROP,     
REMARK 280  TEMPERATURE 278K                                                    
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 61 2 2                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -Y,X-Y,Z+1/3                                            
REMARK 290       3555   -X+Y,-X,Z+2/3                                           
REMARK 290       4555   -X,-Y,Z+1/2                                             
REMARK 290       5555   Y,-X+Y,Z+5/6                                            
REMARK 290       6555   X-Y,X,Z+1/6                                             
REMARK 290       7555   Y,X,-Z+1/3                                              
REMARK 290       8555   X-Y,-Y,-Z                                               
REMARK 290       9555   -X,-X+Y,-Z+2/3                                          
REMARK 290      10555   -Y,-X,-Z+5/6                                            
REMARK 290      11555   -X+Y,Y,-Z+1/2                                           
REMARK 290      12555   X,X-Y,-Z+1/6                                            
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       38.68667            
REMARK 290   SMTRY1   3 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   3 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000       77.37333            
REMARK 290   SMTRY1   4 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000       58.03000            
REMARK 290   SMTRY1   5  0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   5 -0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000       96.71667            
REMARK 290   SMTRY1   6  0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   6  0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       19.34333            
REMARK 290   SMTRY1   7 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   7  0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000       38.68667            
REMARK 290   SMTRY1   8  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   8  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   8  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   9 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   9 -0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   9  0.000000  0.000000 -1.000000       77.37333            
REMARK 290   SMTRY1  10  0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  10 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3  10  0.000000  0.000000 -1.000000       96.71667            
REMARK 290   SMTRY1  11 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2  11  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3  11  0.000000  0.000000 -1.000000       58.03000            
REMARK 290   SMTRY1  12  0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  12  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3  12  0.000000  0.000000 -1.000000       19.34333            
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: PQS                                                   
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 CS    CS A 401  LIES ON A SPECIAL POSITION.                          
REMARK 465                                                                      
REMARK 465 MISSING RESIDUES                                                     
REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE                       
REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.)                
REMARK 465                                                                      
REMARK 465   M RES C SSSEQI                                                     
REMARK 465     MET A     1                                                      
REMARK 465     SER A     2                                                      
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   ND2  ASN A    62     O    HOH A  1227              1.32            
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   O2   SO4 A   201     O    HOH A  1099    12566     0.73            
REMARK 500   S    SO4 A   201     O    HOH A  1099    12566     1.09            
REMARK 500   O3   SO4 A   201     O    HOH A  1099    12566     1.75            
REMARK 500   O4   SO4 A   201     O    HOH A  1099    12566     2.04            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS                                      
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,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3)               
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   RES CSSEQI ATM2   DEVIATION                     
REMARK 500    ARG A 139   CA    ARG A 139   CB      0.500                       
REMARK 500    ARG A 139   CB    ARG A 139   CG     -0.327                       
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  23   NE  -  CZ  -  NH1 ANGL. DEV. =   3.2 DEGREES          
REMARK 500    ARG A  23   NE  -  CZ  -  NH2 ANGL. DEV. =  -4.1 DEGREES          
REMARK 500    ARG A  94   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.3 DEGREES          
REMARK 500    ARG A 139   CB  -  CA  -  C   ANGL. DEV. =  13.0 DEGREES          
REMARK 500    ARG A 139   CA  -  CB  -  CG  ANGL. DEV. = -15.8 DEGREES          
REMARK 500    ARG A 139   CB  -  CG  -  CD  ANGL. DEV. =  35.1 DEGREES          
REMARK 500    ARG A 139   CG  -  CD  -  NE  ANGL. DEV. = -24.8 DEGREES          
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
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 201                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 202                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 203                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CS A 401                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CS A 402                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CS A 403                  
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1S3C   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1S3D   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1SD8   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1SD9   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1SJZ   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1SK0   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1SK2   RELATED DB: PDB                                   
DBREF  1SK1 A    1   140  UNP    P08692   ARSC1_ECOLI      1    140             
SEQADV 1SK1 LYS A   60  UNP  P08692    ARG    60 ENGINEERED MUTATION            
SEQRES   1 A  140  MET SER ASN ILE THR ILE TYR HIS ASN PRO ALA CSR GLY          
SEQRES   2 A  140  THR SER ARG ASN THR LEU GLU MET ILE ARG ASN SER GLY          
SEQRES   3 A  140  THR GLU PRO THR ILE ILE LEU TYR LEU GLU ASN PRO PRO          
SEQRES   4 A  140  SER ARG ASP GLU LEU VAL LYS LEU ILE ALA ASP MET GLY          
SEQRES   5 A  140  ILE SER VAL ARG ALA LEU LEU LYS LYS ASN VAL GLU PRO          
SEQRES   6 A  140  TYR GLU GLN LEU GLY LEU ALA GLU ASP LYS PHE THR ASP          
SEQRES   7 A  140  ASP GLN LEU ILE ASP PHE MET LEU GLN HIS PRO ILE LEU          
SEQRES   8 A  140  ILE ASN ARG PRO ILE VAL VAL THR PRO LEU GLY THR ARG          
SEQRES   9 A  140  LEU CYS ARG PRO SER GLU VAL VAL LEU ASP ILE LEU GLN          
SEQRES  10 A  140  ASP ALA GLN LYS GLY ALA PHE THR LYS GLU ASP GLY GLU          
SEQRES  11 A  140  LYS VAL VAL ASP GLU ALA GLY LYS ARG LEU                      
MODRES 1SK1 CSR A   12  CYS  S-ARSONOCYSTEINE                                   
HET    CSR  A  12      12                                                       
HET    SO4  A 201       5                                                       
HET    SO4  A 202       5                                                       
HET    SO4  A 203       5                                                       
HET     CS  A 401       1                                                       
HET     CS  A 402       1                                                       
HET     CS  A 403       1                                                       
HETNAM     CSR S-ARSONOCYSTEINE                                                 
HETNAM     SO4 SULFATE ION                                                      
HETNAM      CS CESIUM ION                                                       
FORMUL   1  CSR    C3 H8 AS N O5 S                                              
FORMUL   2  SO4    3(O4 S 2-)                                                   
FORMUL   5   CS    3(CS 1+)                                                     
FORMUL   8  HOH   *303(H2 O)                                                    
HELIX    1   1 CSR A   12  SER A   25  1                                  14    
HELIX    2   2 SER A   40  GLY A   52  1                                  13    
HELIX    3   3 SER A   54  LEU A   59  1                                   6    
HELIX    4   4 VAL A   63  LEU A   69  1                                   7    
HELIX    5   5 THR A   77  HIS A   88  1                                  12    
HELIX    6   6 PRO A   89  ILE A   92  5                                   4    
HELIX    7   7 PRO A  108  ILE A  115  5                                   8    
SHEET    1   A 4 THR A  30  ILE A  32  0                                        
SHEET    2   A 4 THR A   5  TYR A   7  1  N  ILE A   6   O  ILE A  32           
SHEET    3   A 4 ILE A  96  THR A  99 -1  O  ILE A  96   N  TYR A   7           
SHEET    4   A 4 GLY A 102  LEU A 105 -1  O  GLY A 102   N  THR A  99           
SHEET    1   B 2 PHE A 124  THR A 125  0                                        
SHEET    2   B 2 LYS A 131  VAL A 133 -1  O  VAL A 132   N  PHE A 124           
LINK         C   ALA A  11                 N   CSR A  12     1555   1555  1.33  
LINK         C   CSR A  12                 N   GLY A  13     1555   1555  1.33  
CISPEP   1 ARG A   94    PRO A   95          0        -4.21                     
CISPEP   2 ARG A  107    PRO A  108          0         2.08                     
SITE     1 AC1  9 CSR A  12  GLY A  13  THR A  14  ASN A  62                    
SITE     2 AC1  9 GLU A  67  HOH A1033  HOH A1076  HOH A1099                    
SITE     3 AC1  9 HOH A1303                                                     
SITE     1 AC2  6 ASN A  93  ARG A 107  HOH A1102  HOH A1116                    
SITE     2 AC2  6 HOH A1180  HOH A1235                                          
SITE     1 AC3 11 THR A  14  ASN A  17  PRO A 108  SER A 109                    
SITE     2 AC3 11 LYS A 126  HOH A1033  HOH A1052  HOH A1123                    
SITE     3 AC3 11 HOH A1167  HOH A1170  HOH A1176                               
SITE     1 AC4  3 LEU A 113  ASP A 114  LEU A 116                               
SITE     1 AC5  1 ASP A 128                                                     
SITE     1 AC6  3 PRO A  38  SER A  40  GLU A  43                               
CRYST1   86.680   86.680  116.060  90.00  90.00 120.00 P 61 2 2     12          
ORIGX1      1.000000  0.000000  0.000000        0.00000                         
ORIGX2      0.000000  1.000000  0.000000        0.00000                         
ORIGX3      0.000000  0.000000  1.000000        0.00000                         
SCALE1      0.011537  0.006661  0.000000        0.00000                         
SCALE2      0.000000  0.013321  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.008616        0.00000