HEADER    TRANSCRIPTION/DNA                       21-AUG-96   1IHF              
TITLE     INTEGRATION HOST FACTOR/DNA COMPLEX                                   
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: DNA (35-MER);                                              
COMPND   3 CHAIN: C;                                                            
COMPND   4 ENGINEERED: YES;                                                     
COMPND   5 MOL_ID: 2;                                                           
COMPND   6 MOLECULE: DNA (5'-D(*GP*GP*CP*CP*AP*AP*AP*AP*AP*AP*GP*CP*AP*TP*T)-   
COMPND   7 3');                                                                 
COMPND   8 CHAIN: D;                                                            
COMPND   9 ENGINEERED: YES;                                                     
COMPND  10 MOL_ID: 3;                                                           
COMPND  11 MOLECULE: DNA (5'-                                                   
COMPND  12 D(*GP*CP*TP*TP*AP*TP*CP*AP*AP*TP*TP*TP*GP*TP*TP*GP*C P*AP*CP*C)-3'); 
COMPND  13 CHAIN: E;                                                            
COMPND  14 SYNONYM: IHF ALPHA CHAIN;                                            
COMPND  15 ENGINEERED: YES;                                                     
COMPND  16 MOL_ID: 4;                                                           
COMPND  17 MOLECULE: PROTEIN (INTEGRATION HOST FACTOR (ALPHA) (IHF));           
COMPND  18 CHAIN: A;                                                            
COMPND  19 SYNONYM: IHF BETA CHAIN;                                             
COMPND  20 MOL_ID: 5;                                                           
COMPND  21 MOLECULE: PROTEIN (INTEGRATION HOST FACTOR (BETA) (IHF));            
COMPND  22 CHAIN: B                                                             
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 SYNTHETIC: YES;                                                      
SOURCE   3 MOL_ID: 2;                                                           
SOURCE   4 SYNTHETIC: YES;                                                      
SOURCE   5 MOL_ID: 3;                                                           
SOURCE   6 SYNTHETIC: YES;                                                      
SOURCE   7 MOL_ID: 4;                                                           
SOURCE   8 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                               
SOURCE   9 ORGANISM_TAXID: 562;                                                 
SOURCE  10 MOL_ID: 5;                                                           
SOURCE  11 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                               
SOURCE  12 ORGANISM_TAXID: 562                                                  
KEYWDS    COMPLEX (TRANSCRIPTION REGULATION-DNA), TRANSCRIPTION FACTOR, BETA    
KEYWDS   2 RIBBON MOTIF, DNA BENDING PROTEIN, TRANSCRIPTION-DNA COMPLEX         
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    P.A.RICE,S.-W.YANG,K.MIZUUCHI,H.A.NASH                                
REVDAT   7   07-FEB-24 1IHF    1       REMARK LINK                              
REVDAT   6   01-MAY-19 1IHF    1       REMARK                                   
REVDAT   5   09-MAY-12 1IHF    1       REMARK                                   
REVDAT   4   02-MAY-12 1IHF    1       LINK   REMARK SITE   VERSN               
REVDAT   3   24-FEB-09 1IHF    1       VERSN                                    
REVDAT   2   01-APR-03 1IHF    1       JRNL                                     
REVDAT   1   12-FEB-97 1IHF    0                                                
JRNL        AUTH   P.A.RICE,S.YANG,K.MIZUUCHI,H.A.NASH                          
JRNL        TITL   CRYSTAL STRUCTURE OF AN IHF-DNA COMPLEX: A PROTEIN-INDUCED   
JRNL        TITL 2 DNA U-TURN.                                                  
JRNL        REF    CELL(CAMBRIDGE,MASS.)         V.  87  1295 1996              
JRNL        REFN                   ISSN 0092-8674                               
JRNL        PMID   8980235                                                      
JRNL        DOI    10.1016/S0092-8674(00)81824-3                                
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.50 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : X-PLOR 3.816                                         
REMARK   3   AUTHORS     : BRUNGER                                              
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.50                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 15.00                          
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)   (%) : 81.5                           
REMARK   3   NUMBER OF REFLECTIONS             : 21918                          
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : R-FREE                          
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE            (WORKING SET) : 0.192                           
REMARK   3   FREE R VALUE                     : 0.255                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1046                            
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) : 2.20                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.30                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 29.00                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 888                          
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3820                       
REMARK   3   BIN FREE R VALUE                    : 0.4260                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 5.00                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 49                           
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            : 1511                                    
REMARK   3   NUCLEIC ACID ATOMS       : 1426                                    
REMARK   3   HETEROGEN ATOMS          : 15                                      
REMARK   3   SOLVENT ATOMS            : 385                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 44.80                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 0.68400                                              
REMARK   3    B22 (A**2) : 23.18000                                             
REMARK   3    B33 (A**2) : -17.70000                                            
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED 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) : 1.180                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : NULL                            
REMARK   3   IMPROPER ANGLES        (DEGREES) : NULL                            
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : NULL                                      
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  : DNA-RNA.PARAM                                  
REMARK   3  PARAMETER FILE  2  : PARHCSDX.PRO                                   
REMARK   3  PARAMETER FILE  3  : PARAM19.SOL                                    
REMARK   3  PARAMETER FILE  4  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : DNA-RNA.TOP                                    
REMARK   3  TOPOLOGY FILE  2   : TOPHCSDX.PRO                                   
REMARK   3  TOPOLOGY FILE  3   : NULL                                           
REMARK   3  TOPOLOGY FILE  4   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS:                                           
REMARK   3  DIFFRACTION IS ANISOTROPIC.  <I/SIGI> FALLS BELOW 2 ALONG X AT 2.5  
REMARK   3  ANGSTROM, ALONG Y AT 3.0 ANGSTROM, AND ALONG Z IS STILL >2 AT 2.2   
REMARK   3  ANGSTROM.  THE COMPLETENESS OF THE DATA WITHIN AN ELLIPSOID WITH    
REMARK   3  THESE PRINCIPLE AXES IS 98.0%.  THIS EXPLAINS THE LOW VALUE OF THE  
REMARK   3  COMPLETENESS IN THE HIGHEST RESOLUTION BIN.  THE REPORTED OVERALL   
REMARK   3  RESOLUTION OF 2.5 ANGSTROM IS AN AVERAGE VALUE.                     
REMARK   3                                                                      
REMARK   3  DNA PARAMETERS FROM PARKINSON, G., VOJTECHOVSKY, J., CLOWNEY, L.,   
REMARK   3  BRUNGER, A.T. AND BERMAN, H.M. (1996) ACTA CRYST. D52, 57-64.       
REMARK   3                                                                      
REMARK   3  NON-WATSON-CRICK BASE PAIRING:                                      
REMARK   3   T C  28  REVERSE WATSON-CRICK BASE PAIR.                           
REMARK   3   T C  29  HOOGSTEEN BASE PAIR.                                      
REMARK   4                                                                      
REMARK   4 1IHF COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY NDB.                                
REMARK 100 THE DEPOSITION ID IS D_1000174160.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 14-MAR-96                          
REMARK 200  TEMPERATURE           (KELVIN) : 100.00                             
REMARK 200  PH                             : 7.40                               
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : N                                  
REMARK 200  RADIATION SOURCE               : ROTATING ANODE                     
REMARK 200  BEAMLINE                       : NULL                               
REMARK 200  X-RAY GENERATOR MODEL          : RIGAKU RU200                       
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : NULL                               
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : DOUBLE FOCUSSING MIRRORS           
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                        
REMARK 200  DETECTOR MANUFACTURER          : RIGAKU RAXIS IIC                   
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : HKL (DENZO)                        
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 22925                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.000                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 15.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : -3.000                             
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 85.2                               
REMARK 200  DATA REDUNDANCY                : 8.200                              
REMARK 200  R MERGE                    (I) : 0.06300                            
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: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL                         
REMARK 200 SOFTWARE USED: MLPHARE, RAVE                                         
REMARK 200 STARTING MODEL: NULL                                                 
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): 2.89                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PH 7.40, VAPOR DIFFUSION, HANGING DROP   
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 21                       
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X+1/2,-Y,Z+1/2                                         
REMARK 290       3555   -X,Y+1/2,-Z+1/2                                         
REMARK 290       4555   X+1/2,-Y+1/2,-Z                                         
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000       23.68000            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000       90.40000            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       29.96000            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000       90.40000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       23.68000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       29.96000            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: PENTAMERIC                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: C, D, E, 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     MET A     1                                                      
REMARK 465     ASP A    98                                                      
REMARK 465     GLU A    99                                                      
REMARK 470                                                                      
REMARK 470 MISSING ATOM                                                         
REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER;           
REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 470 I=INSERTION CODE):                                                   
REMARK 470   M RES CSSEQI  ATOMS                                                
REMARK 470     LYS A  97    CG   CD   CE   NZ                                   
REMARK 470     TYR B  93    CG   CD1  CD2  CE1  CE2  CZ   OH                    
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT                     
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT.                            
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI           DISTANCE          
REMARK 500   H61   DA D    27    HO3'   DT D    29              1.29            
REMARK 500   HE2  HIS B    16    CD     CD B   308              1.41            
REMARK 500   HE2  HIS B    54    CD     CD B   302              1.49            
REMARK 500   H1   MET B     1     O    HOH B   623              1.56            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS                                             
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC             
REMARK 500 SYMMETRY ARE IN CLOSE CONTACT.  AN ATOM LOCATED WITHIN 0.15          
REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A           
REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375             
REMARK 500 INSTEAD OF REMARK 500.  ATOMS WITH NON-BLANK ALTERNATE               
REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS.            
REMARK 500                                                                      
REMARK 500 DISTANCE CUTOFF:                                                     
REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS              
REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS                  
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI  SSYMOP   DISTANCE          
REMARK 500   O2    DC C   -50     H22   DG D    15     3555     1.58            
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    PHE A  49      -82.20   -128.21                                   
REMARK 500    GLN B  14       63.99   -104.98                                   
REMARK 500    PHE B  48      -53.11   -120.04                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 620                                                                      
REMARK 620 METAL COORDINATION                                                   
REMARK 620 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 620 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE):                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CD C 303  CD                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1  DG C -49   N7                                                     
REMARK 620 2 HOH C 710   O    79.1                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CD C 314  CD                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1  DG C -36   N7                                                     
REMARK 620 2 HOH C 573   O   101.3                                              
REMARK 620 3 HOH C 574   O   170.0  72.1                                        
REMARK 620 N                    1     2                                         
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CD C 306  CD                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1  DG C -18   N7                                                     
REMARK 620 2 HOH C 519   O    96.3                                              
REMARK 620 3 HOH C 520   O   102.2  63.5                                        
REMARK 620 4 HOH C 525   O    93.9 138.2 151.5                                  
REMARK 620 N                    1     2     3                                   
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CD E 301  CD                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH C 424   O                                                      
REMARK 620 2  DG E  30   N7  100.9                                              
REMARK 620 3 HOH E 425   O   167.6  82.3                                        
REMARK 620 4 HOH E 662   O    91.0 150.7  80.9                                  
REMARK 620 5 GLU B  73   OE2  71.0 115.4 118.6  93.7                            
REMARK 620 6 GLU B  73   OE1 110.3  79.2  82.0 121.6  49.6                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CD D 305  CD                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1  DG D  15   N7                                                     
REMARK 620 2 HOH D 521   O   110.3                                              
REMARK 620 3 HOH D 522   O    84.6  89.4                                        
REMARK 620 N                    1     2                                         
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CD D 309  CD                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1  DA D  24   N7                                                     
REMARK 620 2 HOH D 450   O    99.5                                              
REMARK 620 3 HOH D 456   O    93.1 165.4                                        
REMARK 620 4 HOH D 457   O    99.4  90.0  95.2                                  
REMARK 620 N                    1     2     3                                   
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CD D 304  CD                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1  DT D  28   OP2                                                    
REMARK 620 2 HOH D 641   O    76.4                                              
REMARK 620 3 HOH D 642   O   118.8  87.2                                        
REMARK 620 4 THR B  60   OG1  82.1 158.3 106.1                                  
REMARK 620 5 HOH B 682   O   165.8 117.7  66.0  83.7                            
REMARK 620 N                    1     2     3     4                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CD A 311  CD                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ALA A   2   O                                                      
REMARK 620 2 GLU A   7   OE2  79.9                                              
REMARK 620 3 HOH A 555   O    68.5  70.1                                        
REMARK 620 4 GLU B  41   OE2  86.7 136.2 141.1                                  
REMARK 620 N                    1     2     3                                   
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CD B 310  CD                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GLU A   7   OE1                                                    
REMARK 620 2 GLU B  41   OE2 117.0                                              
REMARK 620 3 GLU B  41   OE1 125.4  48.7                                        
REMARK 620 N                    1     2                                         
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CD A 307  CD                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GLU A  10   OE2                                                    
REMARK 620 2 ASP A  14   OD1  72.2                                              
REMARK 620 3 ASP A  14   OD2  87.6  45.4                                        
REMARK 620 N                    1     2                                         
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CD B 308  CD                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 GLU A  25   OE2                                                    
REMARK 620 2 GLU A  25   OE1  55.3                                              
REMARK 620 3 GLN B  14   OE1  99.3  91.2                                        
REMARK 620 4 HIS B  16   NE2 143.0  88.0  74.1                                  
REMARK 620 5 HOH B 533   O    98.9 152.8  84.0 116.1                            
REMARK 620 N                    1     2     3     4                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              CD B 302  CD                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 SER B  52   OG                                                     
REMARK 620 2 HIS B  54   NE2  86.9                                              
REMARK 620 3 HIS B  79   ND1  83.3  84.0                                        
REMARK 620 4 HOH B 564   O    80.1  77.0 155.3                                  
REMARK 620 5 HOH B 565   O   158.0  76.8 109.2  81.9                            
REMARK 620 N                    1     2     3     4                             
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD E 301                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD B 302                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD C 303                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD D 304                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD D 305                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD C 306                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC7                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD A 307                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC8                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD B 308                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC9                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD D 309                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD B 310                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD A 311                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD A 312                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD C 313                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD C 314                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: BC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CD C 315                  
REMARK 999                                                                      
REMARK 999 SEQUENCE                                                             
REMARK 999 BASE NUMBERING CORRESPONDS TO STANDARD LAMBDA ATT SITE COORDINATES.  
REMARK 999 BASES 19 - 47 ARE THOSE FOUND IN THE LAMBDA ATT SITE. THE TOP        
REMARK 999 STRAND (CHAINS D AND E) WAS SYNTHESIZED AS TWO OLIGONUCLEOTIDES,     
REMARK 999 RESULTING IN A NICK BETWEEN BASES 29 AND 30. THE BOTTOM STRAND       
REMARK 999 (CHAIN C) WAS SYNTHESIZED AS A SINGLE 35 MER AND HAS BEEN ASSIGNED   
REMARK 999 NEGATIVE RESIDUE NUMBERS SUCH THAT BASES WITH THE SAME ABSOLUTE      
REMARK 999 VALUE ARE PAIRED. THE CRYSTALS PACK TO FORM A PSEUDO-CONTINUOUS      
REMARK 999 HELIX, WITH THE OVERHANGING BASE 15 OF THE TOP STRAND PAIRED TO THE  
REMARK 999 OVERHANGING BASE -50 OF A 21 NEIGHBORING COMPLEX'S BOTTOM STRAND.    
DBREF  1IHF A    1    99  UNP    P0A6X7   IHFA_ECOLI       1     99             
DBREF  1IHF B    1    94  UNP    P0A6Y1   IHFB_ECOLI       1     94             
DBREF  1IHF C  -50   -16  PDB    1IHF     1IHF           -50    -16             
DBREF  1IHF D   15    29  PDB    1IHF     1IHF            15     29             
DBREF  1IHF E   30    49  PDB    1IHF     1IHF            30     49             
SEQRES   1 C   35   DC  DG  DG  DT  DG  DC  DA  DA  DC  DA  DA  DA  DT          
SEQRES   2 C   35   DT  DG  DA  DT  DA  DA  DG  DC  DA  DA  DT  DG  DC          
SEQRES   3 C   35   DT  DT  DT  DT  DT  DT  DG  DG  DC                          
SEQRES   1 D   15   DG  DG  DC  DC  DA  DA  DA  DA  DA  DA  DG  DC  DA          
SEQRES   2 D   15   DT  DT                                                      
SEQRES   1 E   20   DG  DC  DT  DT  DA  DT  DC  DA  DA  DT  DT  DT  DG          
SEQRES   2 E   20   DT  DT  DG  DC  DA  DC  DC                                  
SEQRES   1 A   99  MET ALA LEU THR LYS ALA GLU MET SER GLU TYR LEU PHE          
SEQRES   2 A   99  ASP LYS LEU GLY LEU SER LYS ARG ASP ALA LYS GLU LEU          
SEQRES   3 A   99  VAL GLU LEU PHE PHE GLU GLU ILE ARG ARG ALA LEU GLU          
SEQRES   4 A   99  ASN GLY GLU GLN VAL LYS LEU SER GLY PHE GLY ASN PHE          
SEQRES   5 A   99  ASP LEU ARG ASP LYS ASN GLN ARG PRO GLY ARG ASN PRO          
SEQRES   6 A   99  LYS THR GLY GLU ASP ILE PRO ILE THR ALA ARG ARG VAL          
SEQRES   7 A   99  VAL THR PHE ARG PRO GLY GLN LYS LEU LYS SER ARG VAL          
SEQRES   8 A   99  GLU ASN ALA SER PRO LYS ASP GLU                              
SEQRES   1 B   94  MET THR LYS SER GLU LEU ILE GLU ARG LEU ALA THR GLN          
SEQRES   2 B   94  GLN SER HIS ILE PRO ALA LYS THR VAL GLU ASP ALA VAL          
SEQRES   3 B   94  LYS GLU MET LEU GLU HIS MET ALA SER THR LEU ALA GLN          
SEQRES   4 B   94  GLY GLU ARG ILE GLU ILE ARG GLY PHE GLY SER PHE SER          
SEQRES   5 B   94  LEU HIS TYR ARG ALA PRO ARG THR GLY ARG ASN PRO LYS          
SEQRES   6 B   94  THR GLY ASP LYS VAL GLU LEU GLU GLY LYS TYR VAL PRO          
SEQRES   7 B   94  HIS PHE LYS PRO GLY LYS GLU LEU ARG ASP ARG ALA ASN          
SEQRES   8 B   94  ILE TYR GLY                                                  
HET     CD  C 303       1                                                       
HET     CD  C 306       1                                                       
HET     CD  C 313       1                                                       
HET     CD  C 314       1                                                       
HET     CD  C 315       1                                                       
HET     CD  D 304       1                                                       
HET     CD  D 305       1                                                       
HET     CD  D 309       1                                                       
HET     CD  E 301       1                                                       
HET     CD  A 307       1                                                       
HET     CD  A 311       1                                                       
HET     CD  A 312       1                                                       
HET     CD  B 302       1                                                       
HET     CD  B 308       1                                                       
HET     CD  B 310       1                                                       
HETNAM      CD CADMIUM ION                                                      
FORMUL   6   CD    15(CD 2+)                                                    
FORMUL  21  HOH   *385(H2 O)                                                    
HELIX    1   1 LYS A    5  LEU A   16  1                                  12    
HELIX    2   2 LYS A   20  GLU A   39  1                                  20    
HELIX    3   3 GLN A   85  GLU A   92  1                                   8    
HELIX    4   4 LYS B    3  GLN B   13  1                                  11    
HELIX    5   5 ALA B   19  ALA B   38  1                                  20    
HELIX    6   6 LYS B   84  ALA B   90  1                                   7    
SHEET    1   A 3 VAL A  44  LEU A  46  0                                        
SHEET    2   A 3 GLY A  50  LYS A  57 -1  N  PHE A  52   O  VAL A  44           
SHEET    3   A 3 ARG A  76  PRO A  83 -1  N  ARG A  82   O  ASN A  51           
SHEET    1   B 2 ARG A  60  ARG A  63  0                                        
SHEET    2   B 2 ASP A  70  ILE A  73 -1  N  ILE A  73   O  ARG A  60           
SHEET    1   C 3 ILE B  43  ILE B  45  0                                        
SHEET    2   C 3 GLY B  49  ARG B  56 -1  N  PHE B  51   O  ILE B  43           
SHEET    3   C 3 LYS B  75  PRO B  82 -1  N  LYS B  81   O  SER B  50           
SHEET    1   D 2 ARG B  59  ARG B  62  0                                        
SHEET    2   D 2 LYS B  69  LEU B  72 -1  N  LEU B  72   O  ARG B  59           
LINK         N7   DG C -49                CD    CD C 303     1555   1555  2.41  
LINK         N7   DA C -41                CD    CD C 313     1555   1555  2.41  
LINK         N7   DG C -36                CD    CD C 314     1555   1555  2.08  
LINK         N7   DG C -18                CD    CD C 306     1555   1555  2.53  
LINK        CD    CD C 303                 O   HOH C 710     1555   1555  2.06  
LINK        CD    CD C 306                 O   HOH C 519     1555   1555  2.18  
LINK        CD    CD C 306                 O   HOH C 520     1555   1555  3.12  
LINK        CD    CD C 306                 O   HOH C 525     1555   1555  2.63  
LINK        CD    CD C 314                 O   HOH C 573     1555   1555  2.65  
LINK        CD    CD C 314                 O   HOH C 574     1555   1555  2.43  
LINK        CD    CD C 315                 O   HOH C 520     1555   1555  2.49  
LINK         O   HOH C 424                CD    CD E 301     1555   1555  2.37  
LINK         N7   DG D  15                CD    CD D 305     1555   1555  2.18  
LINK         N7   DA D  24                CD    CD D 309     1555   1555  2.34  
LINK         OP2  DT D  28                CD    CD D 304     1555   1555  1.98  
LINK        CD    CD D 304                 O   HOH D 641     1555   1555  2.14  
LINK        CD    CD D 304                 O   HOH D 642     1555   1555  2.13  
LINK        CD    CD D 304                 OG1 THR B  60     1555   4545  2.31  
LINK        CD    CD D 304                 O   HOH B 682     1555   4545  3.14  
LINK        CD    CD D 305                 O   HOH D 521     1555   1555  2.22  
LINK        CD    CD D 305                 O   HOH D 522     1555   1555  2.20  
LINK        CD    CD D 309                 O   HOH D 450     1555   1555  2.37  
LINK        CD    CD D 309                 O   HOH D 456     1555   1555  2.48  
LINK        CD    CD D 309                 O   HOH D 457     1555   1555  2.53  
LINK         N7   DG E  30                CD    CD E 301     1555   1555  2.30  
LINK        CD    CD E 301                 O   HOH E 425     1555   1555  2.24  
LINK        CD    CD E 301                 O   HOH E 662     1555   1555  2.19  
LINK        CD    CD E 301                 OE2 GLU B  73     1555   4545  2.80  
LINK        CD    CD E 301                 OE1 GLU B  73     1555   4545  2.32  
LINK         O   ALA A   2                CD    CD A 311     1555   1555  2.63  
LINK         OE2 GLU A   7                CD    CD A 311     1555   1555  2.14  
LINK         OE1 GLU A   7                CD    CD B 310     1555   1555  2.97  
LINK         OE2 GLU A  10                CD    CD A 307     1555   1555  2.10  
LINK         OD1 ASP A  14                CD    CD A 307     1555   1555  2.94  
LINK         OD2 ASP A  14                CD    CD A 307     1555   1555  2.71  
LINK         OE2 GLU A  25                CD    CD B 308     1555   1555  2.26  
LINK         OE1 GLU A  25                CD    CD B 308     1555   1555  2.44  
LINK        CD    CD A 311                 O   HOH A 555     1555   1555  2.62  
LINK        CD    CD A 311                 OE2 GLU B  41     1555   1555  3.05  
LINK         OE1 GLN B  14                CD    CD B 308     1555   1555  2.25  
LINK         NE2 HIS B  16                CD    CD B 308     1555   1555  2.22  
LINK         OE2 GLU B  41                CD    CD B 310     1555   1555  2.58  
LINK         OE1 GLU B  41                CD    CD B 310     1555   1555  2.75  
LINK         OG  SER B  52                CD    CD B 302     1555   1555  2.75  
LINK         NE2 HIS B  54                CD    CD B 302     1555   1555  2.42  
LINK         ND1 HIS B  79                CD    CD B 302     1555   1555  2.80  
LINK        CD    CD B 302                 O   HOH B 564     1555   1555  2.15  
LINK        CD    CD B 302                 O   HOH B 565     1555   1555  2.05  
LINK        CD    CD B 308                 O   HOH B 533     1555   1555  2.30  
SITE     1 AC1  5 GLU B  73  HOH C 424   DG E  30  HOH E 425                    
SITE     2 AC1  5 HOH E 662                                                     
SITE     1 AC2  5 SER B  52  HIS B  54  HIS B  79  HOH B 564                    
SITE     2 AC2  5 HOH B 565                                                     
SITE     1 AC3  2  DG C -49  HOH C 710                                          
SITE     1 AC4  4 THR B  60   DT D  28  HOH D 641  HOH D 642                    
SITE     1 AC5  3  DG D  15  HOH D 521  HOH D 522                               
SITE     1 AC6  3  DG C -18  HOH C 519  HOH C 525                               
SITE     1 AC7  2 GLU A  10  ASP A  14                                          
SITE     1 AC8  4 GLU A  25  GLN B  14  HIS B  16  HOH B 533                    
SITE     1 AC9  4  DA D  24  HOH D 450  HOH D 456  HOH D 457                    
SITE     1 BC1  2 GLU A   7  GLU B  41                                          
SITE     1 BC2  4 ALA A   2  GLU A   7  HOH A 555  GLU B  41                    
SITE     1 BC3  2 ARG A  21  ASP A  22                                          
SITE     1 BC4  1  DA C -41                                                     
SITE     1 BC5  3  DG C -36  HOH C 573  HOH C 574                               
SITE     1 BC6  2  DG C -18  HOH C 520                                          
CRYST1   47.360   59.920  180.800  90.00  90.00  90.00 P 21 21 21    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      0.021115  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.016689  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.005531        0.00000