HEADER    DNA BINDING PROTEIN                     22-JUN-98   2TDX              
TITLE     DIPHTHERIA TOX REPRESSOR (C102D MUTANT) COMPLEXED WITH NICKEL         
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: DIPHTHERIA TOX REPRESSOR;                                  
COMPND   3 CHAIN: A;                                                            
COMPND   4 SYNONYM: DTXR;                                                       
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MUTATION: YES;                                                       
COMPND   7 OTHER_DETAILS: COMPLEXED WITH NICKEL (NI)                            
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: CORYNEBACTERIUM DIPHTHERIAE;                    
SOURCE   3 ORGANISM_TAXID: 1717;                                                
SOURCE   4 GENE: DTXR;                                                          
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   7 EXPRESSION_SYSTEM_PLASMID: PET11C                                    
KEYWDS    DNA-BINDING REGULATORY PROTEIN, DIPHTHERIA TOX REPRESSOR,             
KEYWDS   2 TRANSCRIPTION REGULATION, DNA-BINDING PROTEIN, IRON-REGULATED        
KEYWDS   3 REPRESSOR, DNA BINDING PROTEIN                                       
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    A.WHITE,X.DING,H.ZHENG,N.SCHIERING,D.RINGE,J.R.MURPHY                 
REVDAT   7   22-MAY-24 2TDX    1       REMARK                                   
REVDAT   6   09-AUG-23 2TDX    1       REMARK                                   
REVDAT   5   03-NOV-21 2TDX    1       KEYWDS REMARK SEQADV SHEET               
REVDAT   5 2                   1       LINK                                     
REVDAT   4   13-JUL-11 2TDX    1       VERSN                                    
REVDAT   3   24-FEB-09 2TDX    1       VERSN                                    
REVDAT   2   01-APR-03 2TDX    1       JRNL                                     
REVDAT   1   14-OCT-98 2TDX    0                                                
SPRSDE     14-OCT-98 2TDX      1TDX                                             
JRNL        AUTH   A.WHITE,X.DING,J.C.VANDERSPEK,J.R.MURPHY,D.RINGE             
JRNL        TITL   STRUCTURE OF THE METAL-ION-ACTIVATED DIPHTHERIA TOXIN        
JRNL        TITL 2 REPRESSOR/TOX OPERATOR COMPLEX.                              
JRNL        REF    NATURE                        V. 394   502 1998              
JRNL        REFN                   ISSN 0028-0836                               
JRNL        PMID   9697776                                                      
JRNL        DOI    10.1038/28893                                                
REMARK   1                                                                      
REMARK   1 REFERENCE 1                                                          
REMARK   1  AUTH   X.DING,H.ZENG,N.SCHIERING,D.RINGE,J.R.MURPHY                 
REMARK   1  TITL   IDENTIFICATION OF THE PRIMARY METAL ION-ACTIVATION SITES OF  
REMARK   1  TITL 2 THE DIPHTHERIA TOX REPRESSOR BY X-RAY CRYSTALLOGRAPHY AND    
REMARK   1  TITL 3 SITE-DIRECTED MUTATIONAL ANALYSIS                            
REMARK   1  REF    NAT.STRUCT.BIOL.              V.   3   382 1996              
REMARK   1  REFN                   ISSN 1072-8368                               
REMARK   1 REFERENCE 2                                                          
REMARK   1  AUTH   X.QIU,C.L.VERLINDE,S.ZHANG,M.P.SCHMITT,R.K.HOLMES,W.G.HOL    
REMARK   1  TITL   THREE-DIMENSIONAL STRUCTURE OF THE DIPHTHERIA TOXIN          
REMARK   1  TITL 2 REPRESSOR IN COMPLEX WITH DIVALENT CATION CO-REPRESSORS      
REMARK   1  REF    STRUCTURE                     V.   3    87 1995              
REMARK   1  REFN                   ISSN 0969-2126                               
REMARK   1 REFERENCE 3                                                          
REMARK   1  AUTH   N.SCHIERING,X.TAO,H.ZENG,J.R.MURPHY,G.A.PETSKO,D.RINGE       
REMARK   1  TITL   STRUCTURES OF THE APO-AND THE METAL ION-ACTIVATED FORMS OF   
REMARK   1  TITL 2 THE DIPHTHERIA TOX REPRESSOR FROM CORYNEBACTERIUM            
REMARK   1  TITL 3 DIPHTHERIAE                                                  
REMARK   1  REF    PROC.NATL.ACAD.SCI.USA        V.  92  9843 1995              
REMARK   1  REFN                   ISSN 0027-8424                               
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.40 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) : 2.40                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 8.00                           
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 2.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : 1000000.000                    
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : 0.0010                         
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 84.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 8425                           
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : THROUGHOUT                      
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE            (WORKING SET) : 0.246                           
REMARK   3   FREE R VALUE                     : 0.321                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 10.000                          
REMARK   3   FREE R VALUE TEST SET COUNT      : 897                             
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           : 5                            
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.40                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.58                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 67.60                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 1197                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3000                       
REMARK   3   BIN FREE R VALUE                    : 0.3400                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 7.30                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 146                          
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            : 1101                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 2                                       
REMARK   3   SOLVENT ATOMS            : 26                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 27.00                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : NULL                                                 
REMARK   3    B22 (A**2) : NULL                                                 
REMARK   3    B33 (A**2) : NULL                                                 
REMARK   3    B12 (A**2) : NULL                                                 
REMARK   3    B13 (A**2) : NULL                                                 
REMARK   3    B23 (A**2) : NULL                                                 
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : NULL                            
REMARK   3   ESD FROM SIGMAA              (A) : NULL                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : NULL                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : NULL                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : NULL                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.012                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.330                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 25.40                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 0.690                           
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  : PROTEIN_REP.PARAM                              
REMARK   3  PARAMETER FILE  2  : PARAM_NI_AW.PAR                                
REMARK   3  PARAMETER FILE  3  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : TOPH19.PEP                                     
REMARK   3  TOPOLOGY FILE  2   : TOP_NI_AW.PAR                                  
REMARK   3  TOPOLOGY FILE  3   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 2TDX 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_1000178669.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 01-JUN-95                          
REMARK 200  TEMPERATURE           (KELVIN) : 277                                
REMARK 200  PH                             : NULL                               
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 RUH2R                       
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.5418                             
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                        
REMARK 200  DETECTOR MANUFACTURER          : RIGAKU                             
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : R-AXIS                             
REMARK 200  DATA SCALING SOFTWARE          : R-AXIS                             
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 9464                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.320                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 55.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 1.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 80.6                               
REMARK 200  DATA REDUNDANCY                : 2.800                              
REMARK 200  R MERGE                    (I) : 0.04100                            
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: DIFFERENCE FOURIER           
REMARK 200 SOFTWARE USED: X-PLOR 3.851                                          
REMARK 200 STARTING MODEL: APO-DTXR (PDB ENTRY 1DPR)                            
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 70.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 4.03                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: NULL                                     
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 31 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+1/3                                            
REMARK 290       3555   -X+Y,-X,Z+2/3                                           
REMARK 290       4555   Y,X,-Z                                                  
REMARK 290       5555   X-Y,-Y,-Z+2/3                                           
REMARK 290       6555   -X,-X+Y,-Z+1/3                                          
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       35.23333            
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       70.46667            
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       70.46667            
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       35.23333            
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: DIMERIC                           
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC                    
REMARK 350 SOFTWARE USED: PISA,PQS                                              
REMARK 350 TOTAL BURIED SURFACE AREA: 2420 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 13450 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -62.0 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A                                     
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 350   BIOMT1   2 -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      105.70000            
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     VAL A   140                                                      
REMARK 465     GLY A   141                                                      
REMARK 465     ASN A   142                                                      
REMARK 465     SER A   143                                                      
REMARK 465     ASP A   144                                                      
REMARK 465     ALA A   145                                                      
REMARK 465     ALA A   146                                                      
REMARK 465     ALA A   147                                                      
REMARK 465     PRO A   148                                                      
REMARK 465     GLY A   149                                                      
REMARK 465     THR A   150                                                      
REMARK 465     ARG A   151                                                      
REMARK 465     VAL A   152                                                      
REMARK 465     ILE A   153                                                      
REMARK 465     ASP A   154                                                      
REMARK 465     ALA A   155                                                      
REMARK 465     ALA A   156                                                      
REMARK 465     THR A   157                                                      
REMARK 465     SER A   158                                                      
REMARK 465     MET A   159                                                      
REMARK 465     PRO A   160                                                      
REMARK 465     ARG A   161                                                      
REMARK 465     LYS A   162                                                      
REMARK 465     VAL A   163                                                      
REMARK 465     ARG A   164                                                      
REMARK 465     ILE A   165                                                      
REMARK 465     VAL A   166                                                      
REMARK 465     GLN A   167                                                      
REMARK 465     ILE A   168                                                      
REMARK 465     ASN A   169                                                      
REMARK 465     GLU A   170                                                      
REMARK 465     ILE A   171                                                      
REMARK 465     PHE A   172                                                      
REMARK 465     GLN A   173                                                      
REMARK 465     VAL A   174                                                      
REMARK 465     GLU A   175                                                      
REMARK 465     THR A   176                                                      
REMARK 465     ASP A   177                                                      
REMARK 465     GLN A   178                                                      
REMARK 465     PHE A   179                                                      
REMARK 465     THR A   180                                                      
REMARK 465     GLN A   181                                                      
REMARK 465     LEU A   182                                                      
REMARK 465     LEU A   183                                                      
REMARK 465     ASP A   184                                                      
REMARK 465     ALA A   185                                                      
REMARK 465     ASP A   186                                                      
REMARK 465     ILE A   187                                                      
REMARK 465     ARG A   188                                                      
REMARK 465     VAL A   189                                                      
REMARK 465     GLY A   190                                                      
REMARK 465     SER A   191                                                      
REMARK 465     GLU A   192                                                      
REMARK 465     VAL A   193                                                      
REMARK 465     GLU A   194                                                      
REMARK 465     ILE A   195                                                      
REMARK 465     VAL A   196                                                      
REMARK 465     ASP A   197                                                      
REMARK 465     ARG A   198                                                      
REMARK 465     ASP A   199                                                      
REMARK 465     GLY A   200                                                      
REMARK 465     HIS A   201                                                      
REMARK 465     ILE A   202                                                      
REMARK 465     THR A   203                                                      
REMARK 465     LEU A   204                                                      
REMARK 465     SER A   205                                                      
REMARK 465     HIS A   206                                                      
REMARK 465     ASN A   207                                                      
REMARK 465     GLY A   208                                                      
REMARK 465     LYS A   209                                                      
REMARK 465     ASP A   210                                                      
REMARK 465     VAL A   211                                                      
REMARK 465     GLU A   212                                                      
REMARK 465     LEU A   213                                                      
REMARK 465     LEU A   214                                                      
REMARK 465     ASP A   215                                                      
REMARK 465     ASP A   216                                                      
REMARK 465     LEU A   217                                                      
REMARK 465     ALA A   218                                                      
REMARK 465     HIS A   219                                                      
REMARK 465     THR A   220                                                      
REMARK 465     ILE A   221                                                      
REMARK 465     ARG A   222                                                      
REMARK 465     ILE A   223                                                      
REMARK 465     GLU A   224                                                      
REMARK 465     GLU A   225                                                      
REMARK 465     LEU A   226                                                      
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    VAL A   5      -47.02     69.42                                   
REMARK 500    SER A  37     -163.50    -69.04                                   
REMARK 500    PRO A  39        0.07    -67.94                                   
REMARK 500    SER A  58       36.65    -69.75                                   
REMARK 500    ASP A  59       15.15   -152.19                                   
REMARK 500    PRO A  66      -24.99    -38.68                                   
REMARK 500    GLU A 105      -19.75    -44.82                                   
REMARK 500    LEU A 138      -78.55    -58.65                                   
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                              NI A 552  NI                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 MET A  10   SD                                                     
REMARK 620 2 ASP A 102   O   177.7                                              
REMARK 620 3 ASP A 102   OD1  90.6  87.6                                        
REMARK 620 4 GLU A 105   OE2  91.7  89.7  90.8                                  
REMARK 620 5 HIS A 106   NE2  89.6  92.2 179.4  88.6                            
REMARK 620 6 HOH A 251   O    88.7  89.9  90.0 179.1  90.6                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              NI A 551  NI                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HIS A  79   NE2                                                    
REMARK 620 2 GLU A  83   OE2  84.5                                              
REMARK 620 3 HIS A  98   ND1 104.4  93.8                                        
REMARK 620 N                    1     2                                         
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: NI2                                                 
REMARK 800 EVIDENCE_CODE: UNKNOWN                                               
REMARK 800 SITE_DESCRIPTION: PRIMARY METAL-ION BINDING SITE (2).                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: NI1                                                 
REMARK 800 EVIDENCE_CODE: UNKNOWN                                               
REMARK 800 SITE_DESCRIPTION: ANCILLARY METAL-ION BINDING SITE (1).              
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NI A 551                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NI A 552                  
DBREF  2TDX A    1   226  UNP    P33120   DTXR_CORDI       1    226             
SEQADV 2TDX ASP A  102  UNP  P33120    CYS   102 ENGINEERED MUTATION            
SEQRES   1 A  226  MET LYS ASP LEU VAL ASP THR THR GLU MET TYR LEU ARG          
SEQRES   2 A  226  THR ILE TYR GLU LEU GLU GLU GLU GLY VAL THR PRO LEU          
SEQRES   3 A  226  ARG ALA ARG ILE ALA GLU ARG LEU GLU GLN SER GLY PRO          
SEQRES   4 A  226  THR VAL SER GLN THR VAL ALA ARG MET GLU ARG ASP GLY          
SEQRES   5 A  226  LEU VAL VAL VAL ALA SER ASP ARG SER LEU GLN MET THR          
SEQRES   6 A  226  PRO THR GLY ARG THR LEU ALA THR ALA VAL MET ARG LYS          
SEQRES   7 A  226  HIS ARG LEU ALA GLU ARG LEU LEU THR ASP ILE ILE GLY          
SEQRES   8 A  226  LEU ASP ILE ASN LYS VAL HIS ASP GLU ALA ASP ARG TRP          
SEQRES   9 A  226  GLU HIS VAL MET SER ASP GLU VAL GLU ARG ARG LEU VAL          
SEQRES  10 A  226  LYS VAL LEU LYS ASP VAL SER ARG SER PRO PHE GLY ASN          
SEQRES  11 A  226  PRO ILE PRO GLY LEU ASP GLU LEU GLY VAL GLY ASN SER          
SEQRES  12 A  226  ASP ALA ALA ALA PRO GLY THR ARG VAL ILE ASP ALA ALA          
SEQRES  13 A  226  THR SER MET PRO ARG LYS VAL ARG ILE VAL GLN ILE ASN          
SEQRES  14 A  226  GLU ILE PHE GLN VAL GLU THR ASP GLN PHE THR GLN LEU          
SEQRES  15 A  226  LEU ASP ALA ASP ILE ARG VAL GLY SER GLU VAL GLU ILE          
SEQRES  16 A  226  VAL ASP ARG ASP GLY HIS ILE THR LEU SER HIS ASN GLY          
SEQRES  17 A  226  LYS ASP VAL GLU LEU LEU ASP ASP LEU ALA HIS THR ILE          
SEQRES  18 A  226  ARG ILE GLU GLU LEU                                          
HET     NI  A 551       1                                                       
HET     NI  A 552       1                                                       
HETNAM      NI NICKEL (II) ION                                                  
FORMUL   2   NI    2(NI 2+)                                                     
FORMUL   4  HOH   *26(H2 O)                                                     
HELIX    1   A THR A    7  GLU A   21  1                                  15    
HELIX    2   B ARG A   27  ARG A   33  1                                   7    
HELIX    3   C GLY A   38  MET A   48  1                                  11    
HELIX    4   D PRO A   66  ASP A   88  1                                  23    
HELIX    5   E ILE A   94  TRP A  104  1                                  11    
HELIX    6   F ASP A  110  VAL A  119  1                                  10    
SHEET    1   1 2 VAL A  54  VAL A  56  0                                        
SHEET    2   1 2 LEU A  62  MET A  64 -1                                        
LINK         SD  MET A  10                NI    NI A 552     1555   1555  2.45  
LINK         NE2 HIS A  79                NI    NI A 551     1555   1555  2.09  
LINK         OE2 GLU A  83                NI    NI A 551     1555   1555  2.15  
LINK         ND1 HIS A  98                NI    NI A 551     1555   1555  2.10  
LINK         O   ASP A 102                NI    NI A 552     1555   1555  2.11  
LINK         OD1 ASP A 102                NI    NI A 552     1555   1555  2.04  
LINK         OE2 GLU A 105                NI    NI A 552     1555   1555  2.16  
LINK         NE2 HIS A 106                NI    NI A 552     1555   1555  2.15  
LINK         O   HOH A 251                NI    NI A 552     1555   1555  2.09  
SITE     1 NI2  6  NI A 552  MET A  10  ASP A 102  GLU A 105                    
SITE     2 NI2  6 HIS A 106  HOH A 251                                          
SITE     1 NI1  4  NI A 551  HIS A  79  GLU A  83  HIS A  98                    
SITE     1 AC1  3 HIS A  79  GLU A  83  HIS A  98                               
SITE     1 AC2  5 MET A  10  ASP A 102  GLU A 105  HIS A 106                    
SITE     2 AC2  5 HOH A 251                                                     
CRYST1   64.500   64.500  105.700  90.00  90.00 120.00 P 31 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      0.015504  0.008951  0.000000        0.00000                         
SCALE2      0.000000  0.017902  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.009461        0.00000