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Database: PDB
Entry: 1DBQ
LinkDB: 1DBQ
Original site: 1DBQ 
HEADER    DNA-BINDING REGULATORY PROTEIN          13-FEB-96   1DBQ              
TITLE     DNA-BINDING REGULATORY PROTEIN                                        
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: PURINE REPRESSOR;                                          
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 FRAGMENT: COREPRESSOR-FREE COREPRESSOR-BINDING DOMAIN                
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                               
SOURCE   3 ORGANISM_TAXID: 562                                                  
KEYWDS    TRANSCRIPTION REGULATION, DNA-BINDING REGULATORY PROTEIN, PURINE      
KEYWDS   2 REPRESSOR                                                            
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    M.A.SCHUMACHER,K.Y.CHOI,F.LU,H.ZALKIN,R.G.BRENNAN                     
REVDAT   3   07-FEB-24 1DBQ    1       REMARK LINK                              
REVDAT   2   24-FEB-09 1DBQ    1       VERSN                                    
REVDAT   1   07-DEC-96 1DBQ    0                                                
JRNL        AUTH   M.A.SCHUMACHER,K.Y.CHOI,F.LU,H.ZALKIN,R.G.BRENNAN            
JRNL        TITL   MECHANISM OF COREPRESSOR-MEDIATED SPECIFIC DNA BINDING BY    
JRNL        TITL 2 THE PURINE REPRESSOR.                                        
JRNL        REF    CELL(CAMBRIDGE,MASS.)         V.  83   147 1995              
JRNL        REFN                   ISSN 0092-8674                               
JRNL        PMID   7553867                                                      
JRNL        DOI    10.1016/0092-8674(95)90243-0                                 
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.20 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : TNT                                                  
REMARK   3   AUTHORS     : TRONRUD,TEN EYCK,MATTHEWS                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.20                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : NULL                           
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 1.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : NULL                           
REMARK   3   NUMBER OF REFLECTIONS             : 25876                          
REMARK   3                                                                      
REMARK   3  USING DATA ABOVE SIGMA CUTOFF.                                      
REMARK   3   CROSS-VALIDATION METHOD          : NULL                            
REMARK   3   FREE R VALUE TEST SET SELECTION  : NULL                            
REMARK   3   R VALUE     (WORKING + TEST SET) : NULL                            
REMARK   3   R VALUE            (WORKING SET) : 0.156                           
REMARK   3   FREE R VALUE                     : NULL                            
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : NULL                            
REMARK   3   FREE R VALUE TEST SET COUNT      : NULL                            
REMARK   3                                                                      
REMARK   3  USING ALL DATA, NO SIGMA CUTOFF.                                    
REMARK   3   R VALUE   (WORKING + TEST SET, NO CUTOFF) : NULL                   
REMARK   3   R VALUE          (WORKING SET, NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE                  (NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE TEST SET COUNT   (NO CUTOFF) : NULL                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (NO CUTOFF) : NULL                   
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 4344                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 3                                       
REMARK   3   SOLVENT ATOMS            : 244                                     
REMARK   3                                                                      
REMARK   3  WILSON B VALUE (FROM FCALC, A**2) : NULL                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.    RMS    WEIGHT  COUNT           
REMARK   3   BOND LENGTHS                 (A) : 0.018 ; NULL  ; NULL            
REMARK   3   BOND ANGLES            (DEGREES) : 2.790 ; NULL  ; NULL            
REMARK   3   TORSION ANGLES         (DEGREES) : NULL  ; NULL  ; NULL            
REMARK   3   PSEUDOROTATION ANGLES  (DEGREES) : NULL  ; NULL  ; NULL            
REMARK   3   TRIGONAL CARBON PLANES       (A) : NULL  ; NULL  ; NULL            
REMARK   3   GENERAL PLANES               (A) : NULL  ; NULL  ; NULL            
REMARK   3   ISOTROPIC THERMAL FACTORS (A**2) : NULL  ; NULL  ; NULL            
REMARK   3   NON-BONDED CONTACTS          (A) : NULL  ; NULL  ; NULL            
REMARK   3                                                                      
REMARK   3  INCORRECT CHIRAL-CENTERS (COUNT) : 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  RESTRAINT LIBRARIES.                                                
REMARK   3   STEREOCHEMISTRY : NULL                                             
REMARK   3   ISOTROPIC THERMAL FACTOR RESTRAINTS : NULL                         
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1DBQ COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY BNL.                                
REMARK 100 THE DEPOSITION ID IS D_1000172724.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : NULL                               
REMARK 200  TEMPERATURE           (KELVIN) : NULL                               
REMARK 200  PH                             : NULL                               
REMARK 200  NUMBER OF CRYSTALS USED        : NULL                               
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : NULL                               
REMARK 200  RADIATION SOURCE               : NULL                               
REMARK 200  BEAMLINE                       : NULL                               
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : NULL                               
REMARK 200  WAVELENGTH OR RANGE        (A) : NULL                               
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : NULL                               
REMARK 200  DETECTOR MANUFACTURER          : NULL                               
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : NULL                               
REMARK 200  DATA SCALING SOFTWARE          : NULL                               
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : NULL                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : NULL                               
REMARK 200  RESOLUTION RANGE LOW       (A) : NULL                               
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : NULL                               
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : NULL                               
REMARK 200  DATA REDUNDANCY                : NULL                               
REMARK 200  R MERGE                    (I) : NULL                               
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : NULL                               
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : NULL                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : NULL                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : NULL                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: NULL                                           
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL                         
REMARK 200 SOFTWARE USED: NULL                                                  
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 44.36                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.21                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: NULL                                     
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,Y+1/2,-Z                                             
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000  1.000000  0.000000       62.63000            
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 300 REMARK: AS FOR FULL LENGTH PURINE REPRESSOR, THE COREPRESSOR         
REMARK 300 BINDING DOMAIN IS DIMERIC AND THE ENTRY CONTAINS TWO                 
REMARK 300 MONOMERS IN THE ASU.  THE CHAIN IDENTIFIERS ARE A AND B.             
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: 3260 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 24100 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -27.0 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 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     SER A    53                                                      
REMARK 465     LEU A    54                                                      
REMARK 465     LYS A    55                                                      
REMARK 465     VAL A    56                                                      
REMARK 465     ASN A    57                                                      
REMARK 465     HIS A    58                                                      
REMARK 465     THR A    59                                                      
REMARK 465     LEU A   188                                                      
REMARK 465     GLU A   189                                                      
REMARK 465     ARG A   190                                                      
REMARK 465     ASN A   191                                                      
REMARK 465     THR A   192                                                      
REMARK 465     GLY A   193                                                      
REMARK 465     SER B    53                                                      
REMARK 465     LEU B    54                                                      
REMARK 465     LYS B    55                                                      
REMARK 465     VAL B    56                                                      
REMARK 465     ASN B    57                                                      
REMARK 465     HIS B    58                                                      
REMARK 465     THR B    59                                                      
REMARK 465     LEU B   188                                                      
REMARK 465     GLU B   189                                                      
REMARK 465     ARG B   190                                                      
REMARK 465     ASN B   191                                                      
REMARK 465     THR B   192                                                      
REMARK 465     GLY B   193                                                      
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    GLU A  76   CG    GLU A  76   CD      0.090                       
REMARK 500    SER A 330   CB    SER A 330   OG      0.080                       
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 105   NE  -  CZ  -  NH1 ANGL. DEV. =   3.2 DEGREES          
REMARK 500    GLY A 148   C   -  N   -  CA  ANGL. DEV. = -15.2 DEGREES          
REMARK 500    MET A 204   CG  -  SD  -  CE  ANGL. DEV. =  11.9 DEGREES          
REMARK 500    ASP A 338   N   -  CA  -  CB  ANGL. DEV. =  11.3 DEGREES          
REMARK 500    TYR A 339   N   -  CA  -  CB  ANGL. DEV. =  14.0 DEGREES          
REMARK 500    TYR A 339   CA  -  CB  -  CG  ANGL. DEV. =  17.0 DEGREES          
REMARK 500    PRO B 187   C   -  N   -  CD  ANGL. DEV. = -28.1 DEGREES          
REMARK 500    GLY B 195   N   -  CA  -  C   ANGL. DEV. = -15.9 DEGREES          
REMARK 500    MET B 204   CG  -  SD  -  CE  ANGL. DEV. = -13.8 DEGREES          
REMARK 500    PRO B 323   C   -  N   -  CD  ANGL. DEV. = -14.6 DEGREES          
REMARK 500    ASP B 338   N   -  CA  -  CB  ANGL. DEV. =  16.2 DEGREES          
REMARK 500    ASP B 338   CA  -  C   -  N   ANGL. DEV. = -14.0 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    ASN A  99       16.04    108.55                                   
REMARK 500    SER A 124      -33.57     62.37                                   
REMARK 500    ASN A 161       68.92   -103.83                                   
REMARK 500    PHE A 221      -28.34     84.69                                   
REMARK 500    ASP A 275      -55.96    124.85                                   
REMARK 500    ASN A 276       57.14     74.24                                   
REMARK 500    LYS A 312       84.03    -44.82                                   
REMARK 500    GLU A 314       44.36    -97.90                                   
REMARK 500    ARG A 328     -113.11   -113.18                                   
REMARK 500    PHE A 336       21.23    -76.81                                   
REMARK 500    ASP A 338       65.31   -163.91                                   
REMARK 500    ARG A 340     -164.70    159.28                                   
REMARK 500    SER B  68      103.55    164.42                                   
REMARK 500    ALA B  72      -31.24    -32.96                                   
REMARK 500    TYR B  73      -74.57    -62.64                                   
REMARK 500    PHE B  74      -70.95    -54.63                                   
REMARK 500    ALA B  75      -69.32     10.03                                   
REMARK 500    GLU B  82      -71.45    -58.33                                   
REMARK 500    ALA B  97     -125.18    -68.67                                   
REMARK 500    TRP B  98       31.08    143.54                                   
REMARK 500    ASN B  99       75.10     70.37                                   
REMARK 500    ARG B 115       64.54     37.55                                   
REMARK 500    ASP B 117       37.06    -88.95                                   
REMARK 500    LEU B 120      116.37   -169.43                                   
REMARK 500    TYR B 126       56.33   -155.19                                   
REMARK 500    GLU B 149       97.38    -19.75                                   
REMARK 500    ALA B 152       83.15    -59.47                                   
REMARK 500    ASP B 153     -102.70   -127.83                                   
REMARK 500    PHE B 154       14.09   -165.00                                   
REMARK 500    ASN B 161       64.64   -111.93                                   
REMARK 500    MET B 208       31.80     72.47                                   
REMARK 500    PHE B 221      -11.56    101.64                                   
REMARK 500    ASP B 275      -57.14    133.31                                   
REMARK 500    ASN B 276       63.45     71.66                                   
REMARK 500    PRO B 293       92.22    -53.63                                   
REMARK 500    SER B 296      -34.61   -148.73                                   
REMARK 500    LEU B 306      -71.22    -53.42                                   
REMARK 500    VAL B 310      -81.36    -78.95                                   
REMARK 500    ASN B 311       -5.66    -52.70                                   
REMARK 500    PRO B 316      174.96    -55.03                                   
REMARK 500    ARG B 328     -124.76   -139.08                                   
REMARK 500    PHE B 336       53.23    -93.37                                   
REMARK 500    TYR B 339      103.45    136.35                                   
REMARK 500    ARG B 340      170.77     78.99                                   
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 MG A 2                    
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG B 3                    
DBREF  1DBQ A   53   341  UNP    P0ACP7   PURR_ECOLI      52    340             
DBREF  1DBQ B   53   341  UNP    P0ACP7   PURR_ECOLI      52    340             
SEQRES   1 A  289  SER LEU LYS VAL ASN HIS THR LYS SER ILE GLY LEU LEU          
SEQRES   2 A  289  ALA THR SER SER GLU ALA ALA TYR PHE ALA GLU ILE ILE          
SEQRES   3 A  289  GLU ALA VAL GLU LYS ASN CYS PHE GLN LYS GLY TYR THR          
SEQRES   4 A  289  LEU ILE LEU GLY ASN ALA TRP ASN ASN LEU GLU LYS GLN          
SEQRES   5 A  289  ARG ALA TYR LEU SER MET MET ALA GLN LYS ARG VAL ASP          
SEQRES   6 A  289  GLY LEU LEU VAL MET CYS SER GLU TYR PRO GLU PRO LEU          
SEQRES   7 A  289  LEU ALA MET LEU GLU GLU TYR ARG HIS ILE PRO MET VAL          
SEQRES   8 A  289  VAL MET ASP TRP GLY GLU ALA LYS ALA ASP PHE THR ASP          
SEQRES   9 A  289  ALA VAL ILE ASP ASN ALA PHE GLU GLY GLY TYR MET ALA          
SEQRES  10 A  289  GLY ARG TYR LEU ILE GLU ARG GLY HIS ARG GLU ILE GLY          
SEQRES  11 A  289  VAL ILE PRO GLY PRO LEU GLU ARG ASN THR GLY ALA GLY          
SEQRES  12 A  289  ARG LEU ALA GLY PHE MET LYS ALA MET GLU GLU ALA MET          
SEQRES  13 A  289  ILE LYS VAL PRO GLU SER TRP ILE VAL GLN GLY ASP PHE          
SEQRES  14 A  289  GLU PRO GLU SER GLY TYR ARG ALA MET GLN GLN ILE LEU          
SEQRES  15 A  289  SER GLN PRO HIS ARG PRO THR ALA VAL PHE CYS GLY GLY          
SEQRES  16 A  289  ASP ILE MET ALA MET GLY ALA LEU CYS ALA ALA ASP GLU          
SEQRES  17 A  289  MET GLY LEU ARG VAL PRO GLN ASP VAL SER LEU ILE GLY          
SEQRES  18 A  289  TYR ASP ASN VAL ARG ASN ALA ARG TYR PHE THR PRO ALA          
SEQRES  19 A  289  LEU THR THR ILE HIS GLN PRO LYS ASP SER LEU GLY GLU          
SEQRES  20 A  289  THR ALA PHE ASN MET LEU LEU ASP ARG ILE VAL ASN LYS          
SEQRES  21 A  289  ARG GLU GLU PRO GLN SER ILE GLU VAL HIS PRO ARG LEU          
SEQRES  22 A  289  ILE GLU ARG ARG SER VAL ALA ASP GLY PRO PHE ARG ASP          
SEQRES  23 A  289  TYR ARG ARG                                                  
SEQRES   1 B  289  SER LEU LYS VAL ASN HIS THR LYS SER ILE GLY LEU LEU          
SEQRES   2 B  289  ALA THR SER SER GLU ALA ALA TYR PHE ALA GLU ILE ILE          
SEQRES   3 B  289  GLU ALA VAL GLU LYS ASN CYS PHE GLN LYS GLY TYR THR          
SEQRES   4 B  289  LEU ILE LEU GLY ASN ALA TRP ASN ASN LEU GLU LYS GLN          
SEQRES   5 B  289  ARG ALA TYR LEU SER MET MET ALA GLN LYS ARG VAL ASP          
SEQRES   6 B  289  GLY LEU LEU VAL MET CYS SER GLU TYR PRO GLU PRO LEU          
SEQRES   7 B  289  LEU ALA MET LEU GLU GLU TYR ARG HIS ILE PRO MET VAL          
SEQRES   8 B  289  VAL MET ASP TRP GLY GLU ALA LYS ALA ASP PHE THR ASP          
SEQRES   9 B  289  ALA VAL ILE ASP ASN ALA PHE GLU GLY GLY TYR MET ALA          
SEQRES  10 B  289  GLY ARG TYR LEU ILE GLU ARG GLY HIS ARG GLU ILE GLY          
SEQRES  11 B  289  VAL ILE PRO GLY PRO LEU GLU ARG ASN THR GLY ALA GLY          
SEQRES  12 B  289  ARG LEU ALA GLY PHE MET LYS ALA MET GLU GLU ALA MET          
SEQRES  13 B  289  ILE LYS VAL PRO GLU SER TRP ILE VAL GLN GLY ASP PHE          
SEQRES  14 B  289  GLU PRO GLU SER GLY TYR ARG ALA MET GLN GLN ILE LEU          
SEQRES  15 B  289  SER GLN PRO HIS ARG PRO THR ALA VAL PHE CYS GLY GLY          
SEQRES  16 B  289  ASP ILE MET ALA MET GLY ALA LEU CYS ALA ALA ASP GLU          
SEQRES  17 B  289  MET GLY LEU ARG VAL PRO GLN ASP VAL SER LEU ILE GLY          
SEQRES  18 B  289  TYR ASP ASN VAL ARG ASN ALA ARG TYR PHE THR PRO ALA          
SEQRES  19 B  289  LEU THR THR ILE HIS GLN PRO LYS ASP SER LEU GLY GLU          
SEQRES  20 B  289  THR ALA PHE ASN MET LEU LEU ASP ARG ILE VAL ASN LYS          
SEQRES  21 B  289  ARG GLU GLU PRO GLN SER ILE GLU VAL HIS PRO ARG LEU          
SEQRES  22 B  289  ILE GLU ARG ARG SER VAL ALA ASP GLY PRO PHE ARG ASP          
SEQRES  23 B  289  TYR ARG ARG                                                  
HET     MG  A   1       1                                                       
HET     MG  A   2       1                                                       
HET     MG  B   3       1                                                       
HETNAM      MG MAGNESIUM ION                                                    
FORMUL   3   MG    3(MG 2+)                                                     
FORMUL   6  HOH   *244(H2 O)                                                    
HELIX    1   1 ALA A   72  LYS A   88  1                                  17    
HELIX    2   2 LEU A  101  GLN A  113  1                                  13    
HELIX    3   3 GLU A  128  TYR A  137  1                                  10    
HELIX    4   4 ALA A  162  GLU A  175  1                                  14    
HELIX    5   5 GLY A  195  ALA A  207  1                                  13    
HELIX    6   6 GLU A  213  TRP A  215  5                                   3    
HELIX    7   7 PRO A  223  LEU A  234  1                                  12    
HELIX    8   8 ASP A  248  MET A  261  1                                  14    
HELIX    9   9 ALA A  280  TYR A  282  5                                   3    
HELIX   10  10 ASP A  295  VAL A  310  1                                  16    
HELIX   11  11 GLU B   76  LYS B   88  1                                  13    
HELIX   12  12 LYS B  103  GLN B  113  1                                  11    
HELIX   13  13 GLU B  128  GLU B  136  1                                   9    
HELIX   14  14 ALA B  162  GLU B  175  1                                  14    
HELIX   15  15 GLY B  195  ALA B  207  1                                  13    
HELIX   16  16 GLU B  213  TRP B  215  5                                   3    
HELIX   17  17 PRO B  223  LEU B  234  1                                  12    
HELIX   18  18 ASP B  248  MET B  261  1                                  14    
HELIX   19  19 ALA B  280  TYR B  282  5                                   3    
HELIX   20  20 LEU B  297  ILE B  309  1                                  13    
SHEET    1   A 6 MET A 142  MET A 145  0                                        
SHEET    2   A 6 GLY A 118  MET A 122  1  N  LEU A 119   O  VAL A 143           
SHEET    3   A 6 SER A  61  ALA A  66  1  N  GLY A  63   O  GLY A 118           
SHEET    4   A 6 THR A  91  ASN A  96  1  N  THR A  91   O  ILE A  62           
SHEET    5   A 6 THR B  91  ASN B  96 -1  N  LEU B  94   O  LEU A  92           
SHEET    6   A 6 SER B  61  ALA B  66  1  N  ILE B  62   O  THR B  91           
SHEET    1   B 2 ALA A 157  ASP A 160  0                                        
SHEET    2   B 2 SER A 318  VAL A 321  1  N  ILE A 319   O  ALA A 157           
SHEET    1   C 5 ILE A 181  ILE A 184  0                                        
SHEET    2   C 5 ALA A 242  CYS A 245  1  N  ALA A 242   O  GLY A 182           
SHEET    3   C 5 SER A 270  ASP A 275  1  N  SER A 270   O  VAL A 243           
SHEET    4   C 5 THR A 288  HIS A 291  1  N  THR A 288   O  GLY A 273           
SHEET    5   C 5 ARG A 324  ILE A 326 -1  N  ILE A 326   O  THR A 289           
SHEET    1   D 2 MET B 145  TRP B 147  0                                        
SHEET    2   D 2 ASP B 156  VAL B 158  1  N  ASP B 156   O  ASP B 146           
SHEET    1   E 5 ILE B 181  ILE B 184  0                                        
SHEET    2   E 5 ALA B 242  CYS B 245  1  N  ALA B 242   O  GLY B 182           
SHEET    3   E 5 SER B 270  ASP B 275  1  N  SER B 270   O  VAL B 243           
SHEET    4   E 5 THR B 288  HIS B 291  1  N  THR B 288   O  GLY B 273           
SHEET    5   E 5 ARG B 324  ILE B 326 -1  N  ILE B 326   O  THR B 289           
LINK        MG    MG A   2                 O   HOH A 409     1555   1656  2.41  
LINK        MG    MG B   3                 O   HOH B 393     1555   1555  3.06  
CISPEP   1 VAL A  265    PRO A  266          0         0.13                     
CISPEP   2 THR A  284    PRO A  285          0        -1.39                     
CISPEP   3 VAL B  265    PRO B  266          0         1.59                     
CISPEP   4 THR B  284    PRO B  285          0         3.14                     
SITE     1 AC1  1 HOH A 409                                                     
SITE     1 AC2  1 HOH B 393                                                     
CRYST1   38.040  125.260   61.290  90.00 100.17  90.00 P 1 21 1      4          
ORIGX1      1.000000  0.000000  0.000000        0.00000                         
ORIGX2      0.000000  1.000000  0.000000        0.00000                         
ORIGX3      0.000000  0.000000  1.000000        0.00000                         
SCALE1      0.026288  0.000000  0.004716        0.00000                         
SCALE2      0.000000  0.007983  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.016576        0.00000                         
(ATOM LINES ARE NOT SHOWN.)
END                                                                             
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