HEADER    OXIDOREDUCTASE                          04-JUL-01   1H78              
TITLE     STRUCTURAL BASIS FOR ALLOSTERIC SUBSTRATE SPECIFICITY REGULATION IN   
TITLE    2 CLASS III RIBONUCLEOTIDE REDUCTASES: NRDD IN COMPLEX WITH DCTP.      
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: ANAEROBIC RIBONUCLEOTIDE-TRIPHOSPHATE REDUCTASE LARGE      
COMPND   3 CHAIN;                                                               
COMPND   4 CHAIN: A;                                                            
COMPND   5 FRAGMENT: ACTIVE SITE SUBUNIT RESIDUES 1-605;                        
COMPND   6 SYNONYM: ANAEROBIC NTP REDUCTASE;                                    
COMPND   7 EC: 1.17.4.2;                                                        
COMPND   8 ENGINEERED: YES;                                                     
COMPND   9 MUTATION: YES;                                                       
COMPND  10 OTHER_DETAILS: SEQUENCE DETERMINATION\: YOUNG, P., OHMAN, M., XU,    
COMPND  11 M.Q.                                                                 
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: BACTERIOPHAGE T4;                               
SOURCE   3 ORGANISM_TAXID: 10665;                                               
SOURCE   4 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   5 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   6 EXPRESSION_SYSTEM_STRAIN: JM109(DE3);                                
SOURCE   7 EXPRESSION_SYSTEM_PLASMID: PET29T4NRDD(G580A)                        
KEYWDS    OXIDOREDUCTASE, REDUCTASE, ALLOSTERIC REGULATION, SUBSTRATE           
KEYWDS   2 SPECIFICITY                                                          
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    K.-M.LARSSON,J.ANDERSSON,B.-M.SJOEBERG,P.NORDLUND,D.T.LOGAN           
REVDAT   5   13-DEC-23 1H78    1       LINK                                     
REVDAT   4   24-OCT-18 1H78    1       SOURCE                                   
REVDAT   3   17-JAN-18 1H78    1       REMARK ATOM                              
REVDAT   2   24-FEB-09 1H78    1       VERSN                                    
REVDAT   1   04-JUL-02 1H78    0                                                
JRNL        AUTH   K.-M.LARSSON,J.ANDERSSON,B.-M.SJOEBERG,P.NORDLUND,D.T.LOGAN  
JRNL        TITL   STRUCTURAL BASIS FOR ALLOSTERIC SUBSTRATE SPECIFICTY         
JRNL        TITL 2 REGULATION IN ANAEROBIC RIBONUCLEOTIDE REDUCTASE             
JRNL        REF    STRUCTURE                     V.   9   739 2001              
JRNL        REFN                   ISSN 0969-2126                               
JRNL        PMID   11587648                                                     
JRNL        DOI    10.1016/S0969-2126(01)00627-X                                
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.50 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS 1.0                                              
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-              
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,              
REMARK   3               : READ,RICE,SIMONSON,WARREN                            
REMARK   3                                                                      
REMARK   3  REFINEMENT TARGET : NULL                                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.50                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 19.96                          
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)   (%) : 97.9                           
REMARK   3   NUMBER OF REFLECTIONS             : 40833                          
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) : 0.221                           
REMARK   3   FREE R VALUE                     : 0.254                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 8.500                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 3453                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.004                           
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 6                            
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.50                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.66                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 96.70                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 6032                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3000                       
REMARK   3   BIN FREE R VALUE                    : 0.3640                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 8.80                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 579                          
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.015                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 4218                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 57                                      
REMARK   3   SOLVENT ATOMS            : 96                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 52.60                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 58.50                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 4.12000                                              
REMARK   3    B22 (A**2) : 4.12000                                              
REMARK   3    B33 (A**2) : -8.25000                                             
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) : 0.32                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.28                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : 5.00                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : 0.39                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.36                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.022                           
REMARK   3   BOND ANGLES            (DEGREES) : 2.100                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 23.40                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 1.330                           
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : RESTRAINED                                
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : 2.020 ; 1.500                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 3.180 ; 2.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 3.310 ; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 4.480 ; 2.500                
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : FLAT MODEL                                           
REMARK   3   KSOL        : 0.35                                                 
REMARK   3   BSOL        : 45.18                                                
REMARK   3                                                                      
REMARK   3  NCS MODEL : NULL                                                    
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS.                         RMS   SIGMA/WEIGHT          
REMARK   3   GROUP  1  POSITIONAL            (A) : NULL  ; NULL                 
REMARK   3   GROUP  1  B-FACTOR           (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  PARAMETER FILE  1  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: MLF TARGET FUNCTION RESIDUES 544-571      
REMARK   3  NOT MODELLED BUT HAVE WEAK DENSITY                                  
REMARK   4                                                                      
REMARK   4 1H78 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 04-JUL-01.                  
REMARK 100 THE DEPOSITION ID IS D_1290008255.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 15-OCT-99                          
REMARK 200  TEMPERATURE           (KELVIN) : 100.0                              
REMARK 200  PH                             : 7.50                               
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : MAX II                             
REMARK 200  BEAMLINE                       : I711                               
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.0266                             
REMARK 200  MONOCHROMATOR                  : SILICON CRYSTAL                    
REMARK 200  OPTICS                         : BENT MIRROR                        
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                        
REMARK 200  DETECTOR MANUFACTURER          : MAR SCANNER 345 MM PLATE           
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 41517                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.500                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 30.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.1                               
REMARK 200  DATA REDUNDANCY                : 3.700                              
REMARK 200  R MERGE                    (I) : 0.08100                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 21.0000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.50                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.53                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 97.3                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.49300                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 3.300                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: CNS                                                   
REMARK 200 STARTING MODEL: 1B8B.PDB                                             
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 71.21                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 4.27                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 400, MGCL2, HEPES, DTT, PH 7.50      
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 43 21 2                        
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,-Y,Z+1/2                                             
REMARK 290       3555   -Y+1/2,X+1/2,Z+3/4                                      
REMARK 290       4555   Y+1/2,-X+1/2,Z+1/4                                      
REMARK 290       5555   -X+1/2,Y+1/2,-Z+3/4                                     
REMARK 290       6555   X+1/2,-Y+1/2,-Z+1/4                                     
REMARK 290       7555   Y,X,-Z                                                  
REMARK 290       8555   -Y,-X,-Z+1/2                                            
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000      121.25750            
REMARK 290   SMTRY1   3  0.000000 -1.000000  0.000000       48.96750            
REMARK 290   SMTRY2   3  1.000000  0.000000  0.000000       48.96750            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000      181.88625            
REMARK 290   SMTRY1   4  0.000000  1.000000  0.000000       48.96750            
REMARK 290   SMTRY2   4 -1.000000  0.000000  0.000000       48.96750            
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000       60.62875            
REMARK 290   SMTRY1   5 -1.000000  0.000000  0.000000       48.96750            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       48.96750            
REMARK 290   SMTRY3   5  0.000000  0.000000 -1.000000      181.88625            
REMARK 290   SMTRY1   6  1.000000  0.000000  0.000000       48.96750            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       48.96750            
REMARK 290   SMTRY3   6  0.000000  0.000000 -1.000000       60.62875            
REMARK 290   SMTRY1   7  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   7  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   8  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   8 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   8  0.000000  0.000000 -1.000000      121.25750            
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: PQS                                                   
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  0.000000 -1.000000  0.000000       97.93500            
REMARK 350   BIOMT2   2 -1.000000  0.000000  0.000000       97.93500            
REMARK 350   BIOMT3   2  0.000000  0.000000 -1.000000      121.25750            
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     THR A     2                                                      
REMARK 465     ILE A     3                                                      
REMARK 465     GLU A     4                                                      
REMARK 465     LYS A     5                                                      
REMARK 465     GLU A     6                                                      
REMARK 465     ILE A     7                                                      
REMARK 465     GLU A     8                                                      
REMARK 465     GLY A     9                                                      
REMARK 465     LEU A    10                                                      
REMARK 465     ILE A    11                                                      
REMARK 465     HIS A    12                                                      
REMARK 465     LYS A    13                                                      
REMARK 465     THR A    14                                                      
REMARK 465     ASN A    15                                                      
REMARK 465     LYS A    16                                                      
REMARK 465     ASP A    17                                                      
REMARK 465     LEU A    18                                                      
REMARK 465     LEU A    19                                                      
REMARK 465     ASN A    20                                                      
REMARK 465     GLU A    21                                                      
REMARK 465     ASN A    22                                                      
REMARK 465     ALA A    23                                                      
REMARK 465     ASN A    24                                                      
REMARK 465     LYS A    25                                                      
REMARK 465     GLY A   190                                                      
REMARK 465     GLN A   191                                                      
REMARK 465     CYS A   546                                                      
REMARK 465     GLY A   547                                                      
REMARK 465     SER A   548                                                      
REMARK 465     THR A   549                                                      
REMARK 465     HIS A   550                                                      
REMARK 465     GLU A   551                                                      
REMARK 465     MET A   552                                                      
REMARK 465     THR A   553                                                      
REMARK 465     PRO A   554                                                      
REMARK 465     THR A   555                                                      
REMARK 465     GLU A   556                                                      
REMARK 465     ASN A   557                                                      
REMARK 465     GLY A   558                                                      
REMARK 465     PHE A   559                                                      
REMARK 465     VAL A   560                                                      
REMARK 465     CYS A   561                                                      
REMARK 465     SER A   562                                                      
REMARK 465     ILE A   563                                                      
REMARK 465     CYS A   564                                                      
REMARK 465     GLY A   565                                                      
REMARK 465     GLU A   566                                                      
REMARK 465     THR A   567                                                      
REMARK 465     ASP A   568                                                      
REMARK 465     PRO A   569                                                      
REMARK 465     LYS A   570                                                      
REMARK 465     LYS A   571                                                      
REMARK 465     ARG A   588                                                      
REMARK 465     GLY A   589                                                      
REMARK 465     PHE A   590                                                      
REMARK 465     ASN A   591                                                      
REMARK 465     LEU A   592                                                      
REMARK 465     GLY A   593                                                      
REMARK 465     LYS A   594                                                      
REMARK 465     ASN A   595                                                      
REMARK 465     LYS A   596                                                      
REMARK 465     GLU A   597                                                      
REMARK 465     ILE A   598                                                      
REMARK 465     MET A   599                                                      
REMARK 465     HIS A   600                                                      
REMARK 465     ARG A   601                                                      
REMARK 465     VAL A   602                                                      
REMARK 465     LYS A   603                                                      
REMARK 465     HIS A   604                                                      
REMARK 465     GLN A   605                                                      
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   NE2  GLN A   176     O1B  DCP A  1589     8665     2.15            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS                                      
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3)               
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   RES CSSEQI ATM2   DEVIATION                     
REMARK 500    CYS A 543   CB    CYS A 543   SG      0.283                       
REMARK 500    CYS A 579   CB    CYS A 579   SG      0.129                       
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    GLY A  91   C   -  N   -  CA  ANGL. DEV. = -16.6 DEGREES          
REMARK 500    PRO A 193   C   -  N   -  CA  ANGL. DEV. =  11.2 DEGREES          
REMARK 500    ARG A 218   NE  -  CZ  -  NH1 ANGL. DEV. =   5.2 DEGREES          
REMARK 500    ARG A 218   NE  -  CZ  -  NH2 ANGL. DEV. =  -5.7 DEGREES          
REMARK 500    ARG A 379   NE  -  CZ  -  NH1 ANGL. DEV. =   4.9 DEGREES          
REMARK 500    ARG A 379   NE  -  CZ  -  NH2 ANGL. DEV. =  -3.4 DEGREES          
REMARK 500    ARG A 451   NE  -  CZ  -  NH2 ANGL. DEV. =  -5.2 DEGREES          
REMARK 500    CYS A 543   CA  -  CB  -  SG  ANGL. DEV. =  21.5 DEGREES          
REMARK 500    CYS A 543   N   -  CA  -  C   ANGL. DEV. = -16.7 DEGREES          
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: TORSION ANGLES                                             
REMARK 500                                                                      
REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS:            
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2)                    
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI-           
REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400            
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        PSI       PHI                                   
REMARK 500    ASN A  78      -93.30    -98.62                                   
REMARK 500    LYS A 153      -26.05    -39.74                                   
REMARK 500    GLN A 155       71.00     45.99                                   
REMARK 500    ASP A 158       35.41    -74.97                                   
REMARK 500    ALA A 159      -54.14    -23.60                                   
REMARK 500    PRO A 193       99.45    -47.13                                   
REMARK 500    ASP A 204      161.71    -45.74                                   
REMARK 500    ASN A 243       21.92   -157.83                                   
REMARK 500    LYS A 246      -23.93    -34.05                                   
REMARK 500    MET A 265      -49.17     71.15                                   
REMARK 500    ARG A 291       30.55   -150.57                                   
REMARK 500    LEU A 306      -63.37   -122.75                                   
REMARK 500    ALA A 367       85.36   -158.13                                   
REMARK 500    ASP A 465       -6.58     70.04                                   
REMARK 500    VAL A 466      -80.18   -111.59                                   
REMARK 500    SER A 475     -106.72     28.64                                   
REMARK 500    SER A 479      156.22    -48.42                                   
REMARK 500    VAL A 480     -134.44    -67.51                                   
REMARK 500    GLU A 481       42.50     25.79                                   
REMARK 500    ASN A 483       74.71    -59.68                                   
REMARK 500    ASN A 516       50.62   -144.19                                   
REMARK 500    PHE A 544       23.13    -76.47                                   
REMARK 500    CYS A 579      -98.48   -116.02                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: PLANAR GROUPS                                              
REMARK 500                                                                      
REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL                 
REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE                    
REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN                    
REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS                        
REMARK 500 AN RMSD GREATER THAN THIS VALUE                                      
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        RMS     TYPE                                    
REMARK 500    TYR A 139         0.11    SIDE CHAIN                              
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                              MG A1590  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 DCP A1589   O1A                                                    
REMARK 620 2 DCP A1589   O1G  86.7                                              
REMARK 620 3 DCP A1589   O2B 100.3 106.9                                        
REMARK 620 4 HOH A2096   O    77.2 121.4 131.2                                  
REMARK 620 N                    1     2     3                                   
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG A1590                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE DCP A1588                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE DCP A1589                 
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1H77   RELATED DB: PDB                                   
REMARK 900 STRUCTURAL BASIS FOR ALLOSTERIC SUBSTRATE SPECIFICITY REGULATION IN  
REMARK 900 CLASS III RIBONUCLEOTIDE REDUCTASES: NRDD IN COMPLEX WITH DGTP.      
REMARK 900 RELATED ID: 1H79   RELATED DB: PDB                                   
REMARK 900 STRUCTURAL BASIS FOR ALLOSTERIC SUBSTRATE SPECIFICITY REGULATION IN  
REMARK 900 CLASS III RIBONUCLEOTIDE REDUCTASES: NRDD IN COMPLEX WITH DTTP       
REMARK 900 RELATED ID: 1H7A   RELATED DB: PDB                                   
REMARK 900 STRUCTURAL BASIS FOR ALLOSTERIC SUBSTRATE SPECIFICITY REGULATION IN  
REMARK 900 CLASS III RIBONUCLEOTIDE REDUCTASES: NRDD IN COMPLEX WITH DATP.      
REMARK 900 RELATED ID: 1H7B   RELATED DB: PDB                                   
REMARK 900 STRUCTURAL BASIS FOR ALLOSTERIC SUBSTRATE SPECIFICITY REGULATION IN  
REMARK 900 CLASS III RIBONUCLEOTIDE REDUCTASES: NATIVE NRDD                     
DBREF  1H78 A    1   605  UNP    Q9T0V5   Q9T0V5           1    605             
SEQADV 1H78 ALA A  580  UNP  Q9T0V5    GLY   580 ENGINEERED MUTATION            
SEQRES   1 A  605  MET THR ILE GLU LYS GLU ILE GLU GLY LEU ILE HIS LYS          
SEQRES   2 A  605  THR ASN LYS ASP LEU LEU ASN GLU ASN ALA ASN LYS ASP          
SEQRES   3 A  605  SER ARG VAL PHE PRO THR GLN ARG ASP LEU MET ALA GLY          
SEQRES   4 A  605  ILE VAL SER LYS HIS ILE ALA LYS ASN MET VAL PRO SER          
SEQRES   5 A  605  PHE ILE MET LYS ALA HIS GLU SER GLY ILE ILE HIS VAL          
SEQRES   6 A  605  HIS ASP ILE ASP TYR SER PRO ALA LEU PRO PHE THR ASN          
SEQRES   7 A  605  CYS CYS LEU VAL ASP LEU LYS GLY MET LEU GLU ASN GLY          
SEQRES   8 A  605  PHE LYS LEU GLY ASN ALA GLN ILE GLU THR PRO LYS SER          
SEQRES   9 A  605  ILE GLY VAL ALA THR ALA ILE MET ALA GLN ILE THR ALA          
SEQRES  10 A  605  GLN VAL ALA SER HIS GLN TYR GLY GLY THR THR PHE ALA          
SEQRES  11 A  605  ASN VAL ASP LYS VAL LEU SER PRO TYR VAL LYS ARG THR          
SEQRES  12 A  605  TYR ALA LYS HIS ILE GLU ASP ALA GLU LYS TRP GLN ILE          
SEQRES  13 A  605  ALA ASP ALA LEU ASN TYR ALA GLN SER LYS THR GLU LYS          
SEQRES  14 A  605  ASP VAL TYR ASP ALA PHE GLN ALA TYR GLU TYR GLU VAL          
SEQRES  15 A  605  ASN THR LEU PHE SER SER ASN GLY GLN THR PRO PHE VAL          
SEQRES  16 A  605  THR ILE THR PHE GLY THR GLY THR ASP TRP THR GLU ARG          
SEQRES  17 A  605  MET ILE GLN LYS ALA ILE LEU LYS ASN ARG ILE LYS GLY          
SEQRES  18 A  605  LEU GLY ARG ASP GLY ILE THR PRO ILE PHE PRO LYS LEU          
SEQRES  19 A  605  VAL MET PHE VAL GLU GLU GLY VAL ASN LEU TYR LYS ASP          
SEQRES  20 A  605  ASP PRO ASN TYR ASP ILE LYS GLN LEU ALA LEU GLU CYS          
SEQRES  21 A  605  ALA SER LYS ARG MET TYR PRO ASP ILE ILE SER ALA LYS          
SEQRES  22 A  605  ASN ASN LYS ALA ILE THR GLY SER SER VAL PRO VAL SER          
SEQRES  23 A  605  PRO MET GLY CYS ARG SER PHE LEU SER VAL TRP LYS ASP          
SEQRES  24 A  605  SER THR GLY ASN GLU ILE LEU ASP GLY ARG ASN ASN LEU          
SEQRES  25 A  605  GLY VAL VAL THR LEU ASN LEU PRO ARG ILE ALA LEU ASP          
SEQRES  26 A  605  SER TYR ILE GLY THR GLN PHE ASN GLU GLN LYS PHE VAL          
SEQRES  27 A  605  GLU LEU PHE ASN GLU ARG MET ASP LEU CYS PHE GLU ALA          
SEQRES  28 A  605  LEU MET CYS ARG ILE SER SER LEU LYS GLY VAL LYS ALA          
SEQRES  29 A  605  THR VAL ALA PRO ILE LEU TYR GLN GLU GLY ALA PHE GLY          
SEQRES  30 A  605  VAL ARG LEU LYS PRO ASP ASP ASP ILE ILE GLU LEU PHE          
SEQRES  31 A  605  LYS ASN GLY ARG SER SER VAL SER LEU GLY TYR ILE GLY          
SEQRES  32 A  605  ILE HIS GLU LEU ASN ILE LEU VAL GLY ARG ASP ILE GLY          
SEQRES  33 A  605  ARG GLU ILE LEU THR LYS MET ASN ALA HIS LEU LYS GLN          
SEQRES  34 A  605  TRP THR GLU ARG THR GLY PHE ALA PHE SER LEU TYR SER          
SEQRES  35 A  605  THR PRO ALA GLU ASN LEU CYS TYR ARG PHE CYS LYS LEU          
SEQRES  36 A  605  ASP THR GLU LYS TYR GLY SER VAL LYS ASP VAL THR ASP          
SEQRES  37 A  605  LYS GLY TRP TYR THR ASN SER PHE HIS VAL SER VAL GLU          
SEQRES  38 A  605  GLU ASN ILE THR PRO PHE GLU LYS ILE SER ARG GLU ALA          
SEQRES  39 A  605  PRO TYR HIS PHE ILE ALA THR GLY GLY HIS ILE SER TYR          
SEQRES  40 A  605  VAL GLU LEU PRO ASP MET LYS ASN ASN LEU LYS GLY LEU          
SEQRES  41 A  605  GLU ALA VAL TRP ASP TYR ALA ALA GLN HIS LEU ASP TYR          
SEQRES  42 A  605  PHE GLY VAL ASN MET PRO VAL ASP LYS CYS PHE THR CYS          
SEQRES  43 A  605  GLY SER THR HIS GLU MET THR PRO THR GLU ASN GLY PHE          
SEQRES  44 A  605  VAL CYS SER ILE CYS GLY GLU THR ASP PRO LYS LYS MET          
SEQRES  45 A  605  ASN THR ILE ARG ARG THR CYS ALA TYR LEU GLY ASN PRO          
SEQRES  46 A  605  ASN GLU ARG GLY PHE ASN LEU GLY LYS ASN LYS GLU ILE          
SEQRES  47 A  605  MET HIS ARG VAL LYS HIS GLN                                  
HET    DCP  A1588      28                                                       
HET    DCP  A1589      28                                                       
HET     MG  A1590       1                                                       
HETNAM     DCP 2'-DEOXYCYTIDINE-5'-TRIPHOSPHATE                                 
HETNAM      MG MAGNESIUM ION                                                    
FORMUL   2  DCP    2(C9 H16 N3 O13 P3)                                          
FORMUL   4   MG    MG 2+                                                        
FORMUL   5  HOH   *96(H2 O)                                                     
HELIX    1   1 VAL A   29  ASN A   48  1                                  20    
HELIX    2   2 PRO A   51  SER A   60  1                                  10    
HELIX    3   3 ASP A   83  ASN A   90  1                                   8    
HELIX    4   4 SER A  104  SER A  121  1                                  18    
HELIX    5   5 ASN A  131  TRP A  154  1                                  24    
HELIX    6   6 ASP A  158  ASN A  189  1                                  32    
HELIX    7   7 ASP A  204  GLY A  221  1                                  18    
HELIX    8   8 ASN A  250  MET A  265  1                                  16    
HELIX    9   9 ALA A  272  GLY A  280  1                                   9    
HELIX   10  10 LEU A  319  ASP A  325  1                                   7    
HELIX   11  11 ASN A  333  LEU A  359  1                                  27    
HELIX   12  12 ALA A  364  VAL A  366  5                                   3    
HELIX   13  13 ALA A  367  GLN A  372  1                                   6    
HELIX   14  14 ILE A  386  LYS A  391  5                                   6    
HELIX   15  15 GLY A  403  GLY A  412  1                                  10    
HELIX   16  16 ILE A  415  GLY A  435  1                                  21    
HELIX   17  17 ASN A  447  GLY A  461  1                                  15    
HELIX   18  18 THR A  485  PHE A  498  1                                  14    
HELIX   19  19 ASN A  516  LEU A  531  1                                  16    
SHEET    1  AA 4 ILE A  63  VAL A  65  0                                        
SHEET    2  AA 4 ASN A 311  ASN A 318 -1  O  THR A 316   N  HIS A  64           
SHEET    3  AA 4 SER A 396  ILE A 402  1  O  SER A 396   N  LEU A 312           
SHEET    4  AA 4 ALA A 437  SER A 442  1  O  ALA A 437   N  VAL A 397           
SHEET    1  AB 7 CYS A  80  LEU A  81  0                                        
SHEET    2  AB 7 THR A 127  PHE A 129  1  N  THR A 128   O  CYS A  80           
SHEET    3  AB 7 VAL A 195  PHE A 199  1  O  THR A 196   N  PHE A 129           
SHEET    4  AB 7 LYS A 233  VAL A 238  1  O  LYS A 233   N  ILE A 197           
SHEET    5  AB 7 ASP A 268  SER A 271  1  O  ASP A 268   N  MET A 236           
SHEET    6  AB 7 TYR A 533  ASN A 537 -1  O  PHE A 534   N  ILE A 269           
SHEET    7  AB 7 SER A 506  GLU A 509  1  O  SER A 506   N  GLY A 535           
SHEET    1  AC 2 PHE A  92  LEU A  94  0                                        
SHEET    2  AC 2 ALA A  97  ILE A  99 -1  O  ALA A  97   N  LEU A  94           
SHEET    1  AD 2 TYR A 327  ILE A 328  0                                        
SHEET    2  AD 2 GLN A 331  PHE A 332 -1  O  GLN A 331   N  ILE A 328           
SHEET    1  AE 2 VAL A 540  LYS A 542  0                                        
SHEET    2  AE 2 ASN A 573  ILE A 575 -1  N  ASN A 573   O  LYS A 542           
LINK         O1A DCP A1589                MG    MG A1590     1555   1555  1.78  
LINK         O1G DCP A1589                MG    MG A1590     1555   1555  1.83  
LINK         O2B DCP A1589                MG    MG A1590     1555   1555  2.14  
LINK        MG    MG A1590                 O   HOH A2096     1555   1555  2.24  
CISPEP   1 SER A   71    PRO A   72          0         1.43                     
CISPEP   2 PHE A  231    PRO A  232          0        -0.03                     
CISPEP   3 TYR A  266    PRO A  267          0         0.57                     
SITE     1 AC1  2 DCP A1589  HOH A2096                                          
SITE     1 AC2 12 HIS A  64  HIS A  66  ASP A  67  THR A 443                    
SITE     2 AC2 12 PRO A 444  ALA A 445  GLU A 446  ASN A 447                    
SITE     3 AC2 12 LEU A 448  ARG A 451  HOH A2093  HOH A2095                    
SITE     1 AC3 15 ILE A  99  GLU A 100  LYS A 103  VAL A 107                    
SITE     2 AC3 15 ILE A 111  GLN A 114  LYS A 146  ASP A 173                    
SITE     3 AC3 15 GLN A 176  ALA A 177  TYR A 180   MG A1590                    
SITE     4 AC3 15 HOH A2019  HOH A2029  HOH A2096                               
CRYST1   97.935   97.935  242.515  90.00  90.00  90.00 P 43 21 2     8          
ORIGX1      1.000000  0.000000  0.000000        0.00000                         
ORIGX2      0.000000  1.000000  0.000000        0.00000                         
ORIGX3      0.000000  0.000000  1.000000        0.00000                         
SCALE1      0.010211  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.010211  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.004123        0.00000