HEADER    DNA BINDING PROTEIN                     26-SEP-06   2IHF              
TITLE     CRYSTAL STRUCTURE OF DELETION MUTANT DELTA 228-252 R190A OF THE       
TITLE    2 SINGLE-STRANDED DNA BINDING PROTEIN FROM THERMUS AQUATICUS           
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: SINGLE-STRANDED DNA-BINDING PROTEIN;                       
COMPND   3 CHAIN: A;                                                            
COMPND   4 SYNONYM: SSB, HELIX-DESTABILIZING PROTEIN;                           
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: THERMUS AQUATICUS;                              
SOURCE   3 ORGANISM_TAXID: 271;                                                 
SOURCE   4 GENE: SSB;                                                           
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: ROSETTA(DE3)PLYSS;                         
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PETTAQSSB DELTA 228-252 R190A             
KEYWDS    SINGLE-STRANDED DNA BINDING PROTEIN (SSB), THERMOPHILE ORGANISM,      
KEYWDS   2 PROTEIN-DNA INTERACTION, PROTEIN-PROTEIN INTERACTION, DNA BINDING    
KEYWDS   3 PROTEIN                                                              
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    R.FEDOROV,G.WITTE,C.URBANKE,D.J.MANSTEIN,U.CURTH                      
REVDAT   5   30-AUG-23 2IHF    1       REMARK                                   
REVDAT   4   20-OCT-21 2IHF    1       SEQADV                                   
REVDAT   3   13-JUL-11 2IHF    1       VERSN                                    
REVDAT   2   24-FEB-09 2IHF    1       VERSN                                    
REVDAT   1   02-JAN-07 2IHF    0                                                
JRNL        AUTH   R.FEDOROV,G.WITTE,C.URBANKE,D.J.MANSTEIN,U.CURTH             
JRNL        TITL   3D STRUCTURE OF THERMUS AQUATICUS SINGLE-STRANDED            
JRNL        TITL 2 DNA-BINDING PROTEIN GIVES INSIGHT INTO THE FUNCTIONING OF    
JRNL        TITL 3 SSB PROTEINS.                                                
JRNL        REF    NUCLEIC ACIDS RES.            V.  34  6708 2006              
JRNL        REFN                   ISSN 0305-1048                               
JRNL        PMID   17148487                                                     
JRNL        DOI    10.1093/NAR/GKL1002                                          
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.90 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS 1.0                                              
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-              
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,              
REMARK   3               : READ,RICE,SIMONSON,WARREN                            
REMARK   3                                                                      
REMARK   3  REFINEMENT TARGET : ENGH & HUBER                                    
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.90                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 20.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : NULL                           
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : NULL                           
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 100.0                          
REMARK   3   NUMBER OF REFLECTIONS             : 21365                          
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 SET) : 0.222                           
REMARK   3   FREE R VALUE                     : 0.261                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : NULL                            
REMARK   3   FREE R VALUE TEST SET COUNT      : 1068                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : NULL                            
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : NULL                         
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : NULL                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : NULL                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : NULL                         
REMARK   3   BIN FREE R VALUE                    : NULL                         
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : NULL                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : NULL                         
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : NULL                         
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 1657                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 0                                       
REMARK   3   SOLVENT ATOMS            : 167                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 32.60                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 35.12                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : NULL                                                 
REMARK   3    B22 (A**2) : NULL                                                 
REMARK   3    B33 (A**2) : NULL                                                 
REMARK   3    B12 (A**2) : NULL                                                 
REMARK   3    B13 (A**2) : NULL                                                 
REMARK   3    B23 (A**2) : NULL                                                 
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : NULL                            
REMARK   3   ESD FROM SIGMAA              (A) : NULL                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : NULL                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : NULL                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : NULL                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.007                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.400                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : NULL                            
REMARK   3   IMPROPER ANGLES        (DEGREES) : NULL                            
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : ISOTROPIC                                 
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : NULL  ; NULL                 
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : NULL  ; NULL                 
REMARK   3   SIDE-CHAIN BOND              (A**2) : NULL  ; NULL                 
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : NULL                                                 
REMARK   3   KSOL        : NULL                                                 
REMARK   3   BSOL        : NULL                                                 
REMARK   3                                                                      
REMARK   3  NCS MODEL : NULL                                                    
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS.                         RMS   SIGMA/WEIGHT          
REMARK   3   GROUP  1  POSITIONAL            (A) : NULL  ; NULL                 
REMARK   3   GROUP  1  B-FACTOR           (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  PARAMETER FILE  1  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 2IHF COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 28-SEP-06.                  
REMARK 100 THE DEPOSITION ID IS D_1000039574.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 15-APR-05                          
REMARK 200  TEMPERATURE           (KELVIN) : 100.0                              
REMARK 200  PH                             : 6.20                               
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : MPG/DESY, HAMBURG                  
REMARK 200  BEAMLINE                       : BW6                                
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.07000                            
REMARK 200  MONOCHROMATOR                  : SI(111) DOUBLE-CRYSTAL             
REMARK 200                                   MONOCHROMATOR WITH COUPLED         
REMARK 200                                   ROTATIONAL MOTIONS OF TWO FLAT     
REMARK 200                                   CRYSTALS                           
REMARK 200  OPTICS                         : MIRRORS                            
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 4                     
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : XDS                                
REMARK 200  DATA SCALING SOFTWARE          : XDS                                
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 21376                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.900                              
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     (%) : 99.6                               
REMARK 200  DATA REDUNDANCY                : 18.40                              
REMARK 200  R MERGE                    (I) : 0.04400                            
REMARK 200  R SYM                      (I) : 0.10300                            
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) : 1.90                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.00                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 100.0                              
REMARK 200  DATA REDUNDANCY IN SHELL       : 17.00                              
REMARK 200  R MERGE FOR SHELL          (I) : 0.14400                            
REMARK 200  R SYM FOR SHELL            (I) : 0.36700                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 8.400                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: AMORE                                                 
REMARK 200 STARTING MODEL: PDB ENTRY 1SE8                                       
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 48.96                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.41                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 100 MM IMIDAZOLE, 35% 2-ETHOXYETHANOL,   
REMARK 280  220 MM CALCIUM ACETATE, PH 6.2, VAPOR DIFFUSION, SITTING DROP,      
REMARK 280  TEMPERATURE 293.15K, PH 6.20                                        
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 2 2 21                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,-Y,Z+1/2                                             
REMARK 290       3555   -X,Y,-Z+1/2                                             
REMARK 290       4555   X,-Y,-Z                                                 
REMARK 290       5555   X+1/2,Y+1/2,Z                                           
REMARK 290       6555   -X+1/2,-Y+1/2,Z+1/2                                     
REMARK 290       7555   -X+1/2,Y+1/2,-Z+1/2                                     
REMARK 290       8555   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       48.89150            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       48.89150            
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        0.00000            
REMARK 290   SMTRY1   5  1.000000  0.000000  0.000000       33.81650            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       40.21150            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   6 -1.000000  0.000000  0.000000       33.81650            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       40.21150            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       48.89150            
REMARK 290   SMTRY1   7 -1.000000  0.000000  0.000000       33.81650            
REMARK 290   SMTRY2   7  0.000000  1.000000  0.000000       40.21150            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000       48.89150            
REMARK 290   SMTRY1   8  1.000000  0.000000  0.000000       33.81650            
REMARK 290   SMTRY2   8  0.000000 -1.000000  0.000000       40.21150            
REMARK 290   SMTRY3   8  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 300 REMARK: THE BIOLOGICAL ASSEMBLY IS CREATED BY APPLYING THE OPERATION 
REMARK 300 (-X, Y, 1/2 - Z) WITH A SHIFT: 0 0 0                                 
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,PQS                                              
REMARK 350 TOTAL BURIED SURFACE AREA: 3020 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 22310 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -20.0 KCAL/MOL                        
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 350   BIOMT1   2 -1.000000  0.000000  0.000000       67.63300            
REMARK 350   BIOMT2   2  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   2  0.000000  0.000000 -1.000000       48.89150            
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 A1165  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     ARG A   112                                                      
REMARK 465     GLU A   113                                                      
REMARK 465     THR A   114                                                      
REMARK 465     LEU A   115                                                      
REMARK 465     GLU A   116                                                      
REMARK 465     ASP A   117                                                      
REMARK 465     ALA A   118                                                      
REMARK 465     ARG A   119                                                      
REMARK 465     GLY A   120                                                      
REMARK 465     GLN A   121                                                      
REMARK 465     PRO A   122                                                      
REMARK 465     ARG A   123                                                      
REMARK 465     LEU A   124                                                      
REMARK 465     ARG A   125                                                      
REMARK 465     ARG A   162                                                      
REMARK 465     ARG A   163                                                      
REMARK 465     ARG A   164                                                      
REMARK 465     GLY A   165                                                      
REMARK 465     GLN A   166                                                      
REMARK 465     GLU A   167                                                      
REMARK 465     GLU A   168                                                      
REMARK 465     SER A   205                                                      
REMARK 465     TRP A   206                                                      
REMARK 465     THR A   207                                                      
REMARK 465     SER A   208                                                      
REMARK 465     SER A   209                                                      
REMARK 465     SER A   210                                                      
REMARK 465     GLY A   211                                                      
REMARK 465     GLU A   212                                                      
REMARK 465     ARG A   213                                                      
REMARK 465     ASP A   261                                                      
REMARK 465     LEU A   262                                                      
REMARK 465     PRO A   263                                                      
REMARK 465     PHE A   264                                                      
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  1030     O    HOH A  1047     3655     2.15            
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    GLU A  92   CB  -  CA  -  C   ANGL. DEV. = -12.9 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    ARG A   3      -70.50    163.93                                   
REMARK 500    PHE A  40      148.98   -176.60                                   
REMARK 500    ASP A  68      -23.44     72.76                                   
REMARK 500    GLU A  88      -93.03    -84.63                                   
REMARK 500    ASP A  90      -68.51   -178.50                                   
REMARK 500    GLU A  92      -16.99     94.45                                   
REMARK 500    ARG A 110     -167.46     73.25                                   
REMARK 500    ARG A 180     -125.03     48.40                                   
REMARK 500    ASP A 255      160.19    133.27                                   
REMARK 500    PHE A 256      138.30    130.11                                   
REMARK 500    PRO A 258       74.84    -52.54                                   
REMARK 500    GLU A 259       41.28    -86.00                                   
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 GLU A  254     ASP A  255                  124.54                    
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1EYG   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF CHYMOTRYPTIC FRAGMENT OF E. COLI SINGLE-        
REMARK 900 STRANDED DNA-BINDING PROTEIN (SSB) BOUND TO TWO 35-MER SINGLE        
REMARK 900 STRAND DNAS, DETERMINED AT 2.80 ANGSTROM RESOLUTION                  
REMARK 900 RELATED ID: 1SE8   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF SINGLE-STRANDED DNA-BINDING PROTEIN FROM D.     
REMARK 900 RADIODURANS, DETERMINED AT 1.80 ANGSTROM RESOLUTION                  
REMARK 900 RELATED ID: 2IHE   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF WILD-TYPE SINGLE-STRANDED DNA BINDING PROTEIN   
REMARK 900 FROM THERMUS AQUATICUS, DETERMINED AT 2.10 ANGSTROM RESOLUTION       
DBREF  2IHF A    1   264  UNP    Q9KH06   SSB_THEAQ        1    264             
SEQADV 2IHF ALA A  190  UNP  Q9KH06    ARG   190 ENGINEERED MUTATION            
SEQADV 2IHF     A       UNP  Q9KH06    THR   228 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    ARG   229 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    GLY   230 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    PRO   231 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    ALA   232 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    GLN   233 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    ALA   234 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    GLY   235 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    GLY   236 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    SER   237 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    ARG   238 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    PRO   239 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    PRO   240 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    THR   241 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    VAL   242 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    GLN   243 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    THR   244 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    GLY   245 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    GLY   246 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    VAL   247 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    ASP   248 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    ILE   249 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    ASP   250 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    GLU   251 DELETION                       
SEQADV 2IHF     A       UNP  Q9KH06    GLY   252 DELETION                       
SEQRES   1 A  239  MET ALA ARG GLY LEU ASN GLN VAL PHE LEU ILE GLY THR          
SEQRES   2 A  239  LEU THR ALA ARG PRO ASP MET ARG TYR THR PRO GLY GLY          
SEQRES   3 A  239  LEU ALA ILE LEU ASP LEU ASN LEU ALA GLY GLN ASP ALA          
SEQRES   4 A  239  PHE THR ASP GLU SER GLY GLN GLU ARG GLU VAL PRO TRP          
SEQRES   5 A  239  TYR HIS ARG VAL ARG LEU LEU GLY ARG GLN ALA GLU MET          
SEQRES   6 A  239  TRP GLY ASP LEU LEU GLU LYS GLY GLN LEU ILE PHE VAL          
SEQRES   7 A  239  GLU GLY ARG LEU GLU TYR ARG GLN TRP GLU LYS ASP GLY          
SEQRES   8 A  239  GLU LYS LYS SER GLU VAL GLN VAL ARG ALA GLU PHE ILE          
SEQRES   9 A  239  ASP PRO LEU GLU GLY ARG GLY ARG GLU THR LEU GLU ASP          
SEQRES  10 A  239  ALA ARG GLY GLN PRO ARG LEU ARG ARG ALA LEU ASN GLN          
SEQRES  11 A  239  VAL ILE LEU MET GLY ASN LEU THR ARG ASP PRO ASP LEU          
SEQRES  12 A  239  ARG TYR THR PRO GLN GLY THR ALA VAL VAL ARG LEU GLY          
SEQRES  13 A  239  LEU ALA VAL ASN GLU ARG ARG ARG GLY GLN GLU GLU GLU          
SEQRES  14 A  239  ARG THR HIS PHE LEU GLU VAL GLN ALA TRP ARG GLU LEU          
SEQRES  15 A  239  ALA GLU TRP ALA SER GLU LEU ALA LYS GLY ASP GLY LEU          
SEQRES  16 A  239  LEU VAL ILE GLY ARG LEU VAL ASN ASP SER TRP THR SER          
SEQRES  17 A  239  SER SER GLY GLU ARG ARG PHE GLN THR ARG VAL GLU ALA          
SEQRES  18 A  239  LEU ARG LEU GLU ARG PRO LEU GLU ASP PHE PRO PRO GLU          
SEQRES  19 A  239  GLU ASP LEU PRO PHE                                          
FORMUL   2  HOH   *167(H2 O)                                                    
HELIX    1   1 GLY A   60  GLY A   67  1                                   8    
HELIX    2   2 ARG A  180  SER A  187  1                                   8    
SHEET    1   A 5 LEU A  75  GLN A  86  0                                        
SHEET    2   A 5 LEU A   5  LEU A  14 -1  N  LEU A  10   O  VAL A  78           
SHEET    3   A 5 LEU A 128  LEU A 137 -1  O  GLN A 130   N  PHE A   9           
SHEET    4   A 5 ALA A 151  VAL A 159 -1  O  ALA A 158   N  ASN A 136           
SHEET    5   A 5 ASP A 142  TYR A 145 -1  N  ASP A 142   O  ARG A 154           
SHEET    1   B11 LEU A  75  GLN A  86  0                                        
SHEET    2   B11 LEU A   5  LEU A  14 -1  N  LEU A  10   O  VAL A  78           
SHEET    3   B11 ALA A  28  THR A  41 -1  O  ALA A  35   N  THR A  13           
SHEET    4   B11 GLU A  47  LEU A  59 -1  O  VAL A  50   N  ASP A  38           
SHEET    5   B11 SER A  95  LEU A 107  1  O  VAL A  99   N  ARG A  57           
SHEET    6   B11 GLU A  47  LEU A  59  1  N  ARG A  57   O  VAL A  99           
SHEET    7   B11 ALA A  28  THR A  41 -1  N  ASP A  38   O  VAL A  50           
SHEET    8   B11 LEU A   5  LEU A  14 -1  N  THR A  13   O  ALA A  35           
SHEET    9   B11 LEU A 128  LEU A 137 -1  O  GLN A 130   N  PHE A   9           
SHEET   10   B11 ALA A 151  VAL A 159 -1  O  ALA A 158   N  ASN A 136           
SHEET   11   B11 ASP A 142  TYR A 145 -1  N  ASP A 142   O  ARG A 154           
SHEET    1   C 7 LEU A  75  GLN A  86  0                                        
SHEET    2   C 7 LEU A   5  LEU A  14 -1  N  LEU A  10   O  VAL A  78           
SHEET    3   C 7 LEU A 128  LEU A 137 -1  O  GLN A 130   N  PHE A   9           
SHEET    4   C 7 ALA A 151  VAL A 159 -1  O  ALA A 158   N  ASN A 136           
SHEET    5   C 7 HIS A 172  TRP A 179 -1  O  LEU A 174   N  LEU A 157           
SHEET    6   C 7 GLN A 216  GLU A 225  1  O  ALA A 221   N  GLN A 177           
SHEET    7   C 7 GLY A 194  ASP A 204 -1  N  ASP A 204   O  GLN A 216           
SHEET    1   D 4 LEU A  75  GLN A  86  0                                        
SHEET    2   D 4 LEU A   5  LEU A  14 -1  N  LEU A  10   O  VAL A  78           
SHEET    3   D 4 LEU A 128  LEU A 137 -1  O  GLN A 130   N  PHE A   9           
SHEET    4   D 4 GLY A 194  ASP A 204 -1  O  VAL A 197   N  LEU A 133           
SHEET    1   E 6 ASP A  19  TYR A  22  0                                        
SHEET    2   E 6 ALA A  28  THR A  41 -1  O  ILE A  29   N  ARG A  21           
SHEET    3   E 6 LEU A   5  LEU A  14 -1  N  THR A  13   O  ALA A  35           
SHEET    4   E 6 LEU A 128  LEU A 137 -1  O  GLN A 130   N  PHE A   9           
SHEET    5   E 6 ALA A 151  VAL A 159 -1  O  ALA A 158   N  ASN A 136           
SHEET    6   E 6 ASP A 142  TYR A 145 -1  N  ASP A 142   O  ARG A 154           
SHEET    1   F 8 ASP A  19  TYR A  22  0                                        
SHEET    2   F 8 ALA A  28  THR A  41 -1  O  ILE A  29   N  ARG A  21           
SHEET    3   F 8 LEU A   5  LEU A  14 -1  N  THR A  13   O  ALA A  35           
SHEET    4   F 8 LEU A 128  LEU A 137 -1  O  GLN A 130   N  PHE A   9           
SHEET    5   F 8 GLY A 194  ASP A 204 -1  O  VAL A 197   N  LEU A 133           
SHEET    6   F 8 GLN A 216  GLU A 225 -1  O  GLN A 216   N  ASP A 204           
SHEET    7   F 8 HIS A 172  TRP A 179  1  N  GLN A 177   O  ALA A 221           
SHEET    8   F 8 ALA A 151  VAL A 159 -1  N  LEU A 157   O  LEU A 174           
CISPEP   1 PHE A  256    PRO A  257          0        -0.25                     
CRYST1   67.633   80.423   97.783  90.00  90.00  90.00 C 2 2 21      8          
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      0.014786  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.012434  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.010227        0.00000