PDB Short entry for 1CKQ
HEADER    PROTEIN/DNA                             22-APR-99   1CKQ              
TITLE     PRE-TRANSITION STATE ECO RI ENDONUCLEASE/COGNATE DNA                  
TITLE    2 (TCGCGAATTCGCG) COMPLEX                                              
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: DNA (5'-                                                   
COMPND   3 D(*TP*CP*GP*CP*GP*AP*AP*TP*TP*CP*GP*CP*G)-3');                       
COMPND   4 CHAIN: B;                                                            
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MOL_ID: 2;                                                           
COMPND   7 MOLECULE: PROTEIN (ENDONUCLEASE);                                    
COMPND   8 CHAIN: A                                                             
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 SYNTHETIC: YES;                                                      
SOURCE   3 MOL_ID: 2;                                                           
SOURCE   4 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                               
SOURCE   5 ORGANISM_TAXID: 562                                                  
KEYWDS    SEQUENCE-SPECIFIC DNA-PROTEIN COMPLEX, PROTEIN/DNA COMPLEX            
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    M.HORVATH,J.M.ROSENBERG                                               
REVDAT   2   24-FEB-09 1CKQ    1       VERSN                                    
REVDAT   1   26-APR-99 1CKQ    0                                                
JRNL        AUTH   M.HORVATH,J.CHOI,Y.KIM,P.A.WILKOSZ,K.CHANDRASEKHAR,          
JRNL        AUTH 2 J.M.ROSENBERG                                                
JRNL        TITL   THE INTEGRATION OF RECOGNITION AND CLEAVAGE: X-RAY           
JRNL        TITL 2 STRUCTURES OF PRE- TRANSITION STATE AND                      
JRNL        TITL 3 POST-REACTIVE DNA-ECO RI ENDONUCLEASE COMPLEXES              
JRNL        REF    TO BE PUBLISHED                                              
JRNL        REFN                                                                
REMARK   1                                                                      
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.85 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : X-PLOR 3.851                                         
REMARK   3   AUTHORS     : BRUNGER                                              
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.85                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 8.00                           
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 2.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : 10000000.000                   
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : 0.0010                         
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 99.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 27076                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : RFREE                           
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE            (WORKING SET) : 0.235                           
REMARK   3   FREE R VALUE                     : 0.286                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 10.000                          
REMARK   3   FREE R VALUE TEST SET COUNT      : 3025                            
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           : 8                            
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 1.85                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.93                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 91.00                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 801                          
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3798                       
REMARK   3   BIN FREE R VALUE                    : 0.3858                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 12.00                        
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 109                          
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            : 2051                                    
REMARK   3   NUCLEIC ACID ATOMS       : 263                                     
REMARK   3   HETEROGEN ATOMS          : 0                                       
REMARK   3   SOLVENT ATOMS            : 151                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 38.30                          
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) : 0.30                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.28                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : 8.00                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : 0.34                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.31                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.003                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.03                            
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : NULL                            
REMARK   3   IMPROPER ANGLES        (DEGREES) : 0.89                            
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : RESTRAINED                                
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  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  : PARHCSDX.PRO                                   
REMARK   3  PARAMETER FILE  2  : PARAM11.WAT                                    
REMARK   3  PARAMETER FILE  3  : DNA-RNA.PARAM                                  
REMARK   3  PARAMETER FILE  4  : NULL                                           
REMARK   3  PARAMETER FILE  5  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : TOPHCSDX.PRO                                   
REMARK   3  TOPOLOGY FILE  2   : TOPH19.PEP                                     
REMARK   3  TOPOLOGY FILE  3   : TOPH11.WAT                                     
REMARK   3  TOPOLOGY FILE  4   : DNA-RNA.TOP                                    
REMARK   3  TOPOLOGY FILE  5   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1CKQ COMPLIES WITH FORMAT V. 3.15, 01-DEC-08                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 23-APR-99.                  
REMARK 100 THE RCSB ID CODE IS RCSB000923.                                      
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 15-APR-98                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 7.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : CHESS                              
REMARK 200  BEAMLINE                       : F1                                 
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.100                              
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : MIRRORS                            
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                        
REMARK 200  DETECTOR MANUFACTURER          : NULL                               
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 32270                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.850                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 8.000                              
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.1                               
REMARK 200  DATA REDUNDANCY                : 10.600                             
REMARK 200  R MERGE                    (I) : 0.12400                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 22.2000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.85                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.91                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 91.1                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 4.10                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.44600                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 2.000                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: OTHER                        
REMARK 200 SOFTWARE USED: NULL                                                  
REMARK 200 STARTING MODEL: PDB ENTRY 1ERI                                       
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): 2.84                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PH 7.5, VAPOR DIFFUSION, HANGING         
REMARK 280  DROP                                                                
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 3 2 1                          
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -Y,X-Y,Z                                                
REMARK 290       3555   -X+Y,-X,Z                                               
REMARK 290       4555   Y,X,-Z                                                  
REMARK 290       5555   X-Y,-Y,-Z                                               
REMARK 290       6555   -X,-X+Y,-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 -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        0.00000            
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        0.00000            
REMARK 290   SMTRY1   4 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   4  0.866025  0.500000  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        0.00000            
REMARK 290   SMTRY2   5  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   5  0.000000  0.000000 -1.000000        0.00000            
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        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:                                                              
REMARK 300 ECO RI IS A DIMER. THE CRYSTALLOGRAPHIC ASYMMETRIC UNIT              
REMARK 300 CONSISTS OF A MONOMER AND THE COORDINATES OF THIS MONOMER            
REMARK 300 ARE PRESENTED IN THIS ENTRY. TO GENERATE THE DIMER AND THE           
REMARK 300 OTHER HALF OF THE DNA DUPLEX ONE MUST APPLY THE FOLLOWING            
REMARK 300 CRYSTALLOGRAPHIC TWO-FOLD TRANSFORMATION TO THE COORDINATES          
REMARK 300 IN THIS ENTRY - -.5 .866025 0.0 .866025 .5 0.0 0.0 0.0 -1.0          
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: TETRAMERIC                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: B, 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 -0.500000  0.866025  0.000000        0.00000            
REMARK 350   BIOMT2   2  0.866025  0.500000  0.000000        0.00000            
REMARK 350   BIOMT3   2  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     2                                                      
REMARK 465     ASN A     3                                                      
REMARK 465     LYS A     4                                                      
REMARK 465     LYS A     5                                                      
REMARK 465     GLN A     6                                                      
REMARK 465     SER A     7                                                      
REMARK 465     ASN A     8                                                      
REMARK 465     ARG A     9                                                      
REMARK 465     LEU A    10                                                      
REMARK 465     THR A    11                                                      
REMARK 465     GLU A    12                                                      
REMARK 465     GLN A    13                                                      
REMARK 465     HIS A    14                                                      
REMARK 465     LYS A    15                                                      
REMARK 465     LEU A    16                                                      
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    LEU A  81      111.78   -164.62                                   
REMARK 500    ASN A  85       43.69   -103.43                                   
REMARK 500    PRO A 164       48.40    -81.34                                   
REMARK 500    ASN A 224      136.51   -174.42                                   
REMARK 500    HIS A 225      -70.81    -84.22                                   
REMARK 500    ASP A 227       74.58     51.83                                   
REMARK 500    LYS A 228      -52.53   -141.11                                   
REMARK 500    SER A 229      118.67     73.68                                   
REMARK 500    SER A 276       44.87    -84.86                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: PLANAR GROUPS                                              
REMARK 500                                                                      
REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL                 
REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE                    
REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN                    
REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS                        
REMARK 500 AN RMSD GREATER THAN THIS VALUE                                      
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        RMS     TYPE                                    
REMARK 500     DT B   8         0.06    SIDE_CHAIN                              
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 525                                                                      
REMARK 525 SOLVENT                                                              
REMARK 525                                                                      
REMARK 525 THE SOLVENT MOLECULES HAVE CHAIN IDENTIFIERS THAT                    
REMARK 525 INDICATE THE POLYMER CHAIN WITH WHICH THEY ARE MOST                  
REMARK 525 CLOSELY ASSOCIATED. THE REMARK LISTS ALL THE SOLVENT                 
REMARK 525 MOLECULES WHICH ARE MORE THAN 5A AWAY FROM THE                       
REMARK 525 NEAREST POLYMER CHAIN (M = MODEL NUMBER;                             
REMARK 525 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE                  
REMARK 525 NUMBER; I=INSERTION CODE):                                           
REMARK 525                                                                      
REMARK 525  M RES CSSEQI                                                        
REMARK 525    HOH A 362        DISTANCE =  5.42 ANGSTROMS                       
REMARK 525    HOH A 391        DISTANCE =  7.91 ANGSTROMS                       
REMARK 525    HOH A 400        DISTANCE = 11.06 ANGSTROMS                       
REMARK 525    HOH A 401        DISTANCE = 12.37 ANGSTROMS                       
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: HYD                                                 
REMARK 800 EVIDENCE_CODE: AUTHOR                                                
REMARK 800 SITE_DESCRIPTION: PROTEIN RECOGNTION RESIDUES GROUPS THAT            
REMARK 800  HYDROGEN BOND TO THE DNA BASES AND/OR PROVIDE PRIMARY               
REMARK 800  BUTTRESSING.                                                        
REMARK 800 SITE_IDENTIFIER: DNA                                                 
REMARK 800 EVIDENCE_CODE: AUTHOR                                                
REMARK 800 SITE_DESCRIPTION: DNA RECOGNITION SEQUENCE THIS IS THE DNA           
REMARK 800  TARGET RECOGNIZED BY THE PROTEIN                                    
REMARK 999                                                                      
REMARK 999 SEQUENCE                                                             
REMARK 999 FIRST 15 RESIDUES ARE DISORDERED IN THE CRYSTAL STRUCTURE            
REMARK 999 AND NOT SEEN IN THE ELECTRON DENSITY.                                
DBREF  1CKQ A    2   277  UNP    P00642   T2E1_ECOLI       1    276             
DBREF  1CKQ B    1    13  PDB    1CKQ     1CKQ             1     13             
SEQRES   1 B   13   DT  DC  DG  DC  DG  DA  DA  DT  DT  DC  DG  DC  DG          
SEQRES   1 A  276  SER ASN LYS LYS GLN SER ASN ARG LEU THR GLU GLN HIS          
SEQRES   2 A  276  LYS LEU SER GLN GLY VAL ILE GLY ILE PHE GLY ASP TYR          
SEQRES   3 A  276  ALA LYS ALA HIS ASP LEU ALA VAL GLY GLU VAL SER LYS          
SEQRES   4 A  276  LEU VAL LYS LYS ALA LEU SER ASN GLU TYR PRO GLN LEU          
SEQRES   5 A  276  SER PHE ARG TYR ARG ASP SER ILE LYS LYS THR GLU ILE          
SEQRES   6 A  276  ASN GLU ALA LEU LYS LYS ILE ASP PRO ASP LEU GLY GLY          
SEQRES   7 A  276  THR LEU PHE VAL SER ASN SER SER ILE LYS PRO ASP GLY          
SEQRES   8 A  276  GLY ILE VAL GLU VAL LYS ASP ASP TYR GLY GLU TRP ARG          
SEQRES   9 A  276  VAL VAL LEU VAL ALA GLU ALA LYS HIS GLN GLY LYS ASP          
SEQRES  10 A  276  ILE ILE ASN ILE ARG ASN GLY LEU LEU VAL GLY LYS ARG          
SEQRES  11 A  276  GLY ASP GLN ASP LEU MET ALA ALA GLY ASN ALA ILE GLU          
SEQRES  12 A  276  ARG SER HIS LYS ASN ILE SER GLU ILE ALA ASN PHE MET          
SEQRES  13 A  276  LEU SER GLU SER HIS PHE PRO TYR VAL LEU PHE LEU GLU          
SEQRES  14 A  276  GLY SER ASN PHE LEU THR GLU ASN ILE SER ILE THR ARG          
SEQRES  15 A  276  PRO ASP GLY ARG VAL VAL ASN LEU GLU TYR ASN SER GLY          
SEQRES  16 A  276  ILE LEU ASN ARG LEU ASP ARG LEU THR ALA ALA ASN TYR          
SEQRES  17 A  276  GLY MET PRO ILE ASN SER ASN LEU CYS ILE ASN LYS PHE          
SEQRES  18 A  276  VAL ASN HIS LYS ASP LYS SER ILE MET LEU GLN ALA ALA          
SEQRES  19 A  276  SER ILE TYR THR GLN GLY ASP GLY ARG GLU TRP ASP SER          
SEQRES  20 A  276  LYS ILE MET PHE GLU ILE MET PHE ASP ILE SER THR THR          
SEQRES  21 A  276  SER LEU ARG VAL LEU GLY ARG ASP LEU PHE GLU GLN LEU          
SEQRES  22 A  276  THR SER LYS                                                  
FORMUL   3  HOH   *151(H2 O)                                                    
HELIX    1   1 GLY A   19  HIS A   31  5                                  13    
HELIX    2   2 VAL A   35  GLU A   49  1                                  15    
HELIX    3   3 LYS A   63  ILE A   73  1                                  11    
HELIX    4   4 ASP A  118  ARG A  123  1                                   6    
HELIX    5   5 ALA A  142  PHE A  156  5                                  15    
HELIX    6   6 LEU A  201  ARG A  203  5                                   3    
HELIX    7   7 THR A  205  ASN A  208  5                                   4    
HELIX    8   8 SER A  248  VAL A  265  1                                  18    
HELIX    9   9 GLY A  267  ASP A  269  5                                   3    
HELIX   10  10 PHE A  271  THR A  275  1                                   5    
SHEET    1   A 5 PHE A  55  ARG A  58  0                                        
SHEET    2   A 5 ILE A  94  LYS A  98 -1  N  GLU A  96   O  ARG A  56           
SHEET    3   A 5 TRP A 104  HIS A 114 -1  N  LEU A 108   O  VAL A  95           
SHEET    4   A 5 TYR A 165  GLU A 170  1  N  VAL A 166   O  VAL A 109           
SHEET    5   A 5 SER A 236  THR A 239  1  N  SER A 236   O  LEU A 167           
SHEET    1   B 2 ILE A 179  THR A 182  0                                        
SHEET    2   B 2 VAL A 188  LEU A 191 -1  N  LEU A 191   O  ILE A 179           
SHEET    1   C 2 LYS A 221  VAL A 223  0                                        
SHEET    2   C 2 ILE A 230  LEU A 232 -1  N  LEU A 232   O  LYS A 221           
SITE     1 HYD  9 ALA A 138  ASN A 141  ALA A 142  GLU A 144                    
SITE     2 HYD  9 ARG A 145  ARG A 200  ARG A 203  HOH A 278                    
SITE     3 HYD  9 HOH B  14                                                     
SITE     1 DNA  6  DG B   5   DA B   6   DA B   7   DT B   8                    
SITE     2 DNA  6  DT B   9   DC B  10                                          
CRYST1  118.110  118.110   49.450  90.00  90.00 120.00 P 3 2 1       6          
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      0.008467  0.004888  0.000000        0.00000                         
SCALE2      0.000000  0.009776  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.020222        0.00000