HEADER    TRANSFERASE                             23-APR-97   1AIQ              
TITLE     CRYSTAL STRUCTURE OF THYMIDYLATE SYNTHASE R126E MUTANT                
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: THYMIDYLATE SYNTHASE;                                      
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 SYNONYM: TRANSFERASE;                                                
COMPND   5 EC: 2.1.1.45;                                                        
COMPND   6 ENGINEERED: YES;                                                     
COMPND   7 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                               
SOURCE   3 ORGANISM_TAXID: 562;                                                 
SOURCE   4 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   5 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   6 EXPRESSION_SYSTEM_STRAIN: XAC25 THY- STRAIN;                         
SOURCE   7 EXPRESSION_SYSTEM_PLASMID: BLUSCRIPT SK+                             
KEYWDS    TRANSFERASE, METHYLTRANSFERASE                                        
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    P.STROP,W.R.MONTFORT                                                  
REVDAT   7   30-OCT-24 1AIQ    1       REMARK                                   
REVDAT   6   03-NOV-21 1AIQ    1       REMARK SEQADV LINK                       
REVDAT   5   18-APR-18 1AIQ    1       REMARK                                   
REVDAT   4   13-JUL-11 1AIQ    1       VERSN                                    
REVDAT   3   24-FEB-09 1AIQ    1       VERSN                                    
REVDAT   2   11-JUN-99 1AIQ    1       JRNL                                     
REVDAT   1   12-NOV-97 1AIQ    0                                                
JRNL        AUTH   P.STROP,L.CHANGCHIEN,F.MALEY,W.R.MONTFORT                    
JRNL        TITL   CRYSTAL STRUCTURES OF A MARGINALLY ACTIVE THYMIDYLATE        
JRNL        TITL 2 SYNTHASE MUTANT, ARG 126-->GLU.                              
JRNL        REF    PROTEIN SCI.                  V.   6  2504 1997              
JRNL        REFN                   ISSN 0961-8368                               
JRNL        PMID   9416600                                                      
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.20 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : TNT 5E                                               
REMARK   3   AUTHORS     : TRONRUD,TEN EYCK,MATTHEWS                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.20                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 20.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 2.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 90.0                           
REMARK   3   NUMBER OF REFLECTIONS             : 29307                          
REMARK   3                                                                      
REMARK   3  USING DATA ABOVE SIGMA CUTOFF.                                      
REMARK   3   CROSS-VALIDATION METHOD          : NULL                            
REMARK   3   FREE R VALUE TEST SET SELECTION  : NULL                            
REMARK   3   R VALUE     (WORKING + TEST SET) : NULL                            
REMARK   3   R VALUE            (WORKING SET) : 0.163                           
REMARK   3   FREE R VALUE                     : NULL                            
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : NULL                            
REMARK   3   FREE R VALUE TEST SET COUNT      : NULL                            
REMARK   3                                                                      
REMARK   3  USING ALL DATA, NO SIGMA CUTOFF.                                    
REMARK   3   R VALUE   (WORKING + TEST SET, NO CUTOFF) : NULL                   
REMARK   3   R VALUE          (WORKING SET, NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE                  (NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE TEST SET COUNT   (NO CUTOFF) : NULL                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (NO CUTOFF) : NULL                   
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 4302                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 110                                     
REMARK   3   SOLVENT ATOMS            : 176                                     
REMARK   3                                                                      
REMARK   3  WILSON B VALUE (FROM FCALC, A**2) : NULL                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.    RMS    WEIGHT  COUNT           
REMARK   3   BOND LENGTHS                 (A) : 0.009 ; 0.800 ; 4539            
REMARK   3   BOND ANGLES            (DEGREES) : 1.009 ; 1.300 ; 6124            
REMARK   3   TORSION ANGLES         (DEGREES) : 18.785; 0.000 ; 2564            
REMARK   3   PSEUDOROTATION ANGLES  (DEGREES) : NULL  ; NULL  ; NULL            
REMARK   3   TRIGONAL CARBON PLANES       (A) : 0.006 ; 2.000 ; 126             
REMARK   3   GENERAL PLANES               (A) : 0.013 ; 5.000 ; 638             
REMARK   3   ISOTROPIC THERMAL FACTORS (A**2) : NULL  ; NULL  ; NULL            
REMARK   3   NON-BONDED CONTACTS          (A) : 0.022 ; 10.000; 43              
REMARK   3                                                                      
REMARK   3  INCORRECT CHIRAL-CENTERS (COUNT) : NULL                             
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : NULL                                                 
REMARK   3   KSOL        : 0.66                                                 
REMARK   3   BSOL        : 143.2                                                
REMARK   3                                                                      
REMARK   3  RESTRAINT LIBRARIES.                                                
REMARK   3   STEREOCHEMISTRY : TNT PROTGEO                                      
REMARK   3   ISOTROPIC THERMAL FACTOR RESTRAINTS : TNT BCORREL                  
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1AIQ 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_1000170866.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : DEC-95                             
REMARK 200  TEMPERATURE           (KELVIN) : 295                                
REMARK 200  PH                             : 8.0                                
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          : ENRAF-NONIUS FR571                 
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.5418                             
REMARK 200  MONOCHROMATOR                  : GRAPHITE(002)                      
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : DIFFRACTOMETER                     
REMARK 200  DETECTOR MANUFACTURER          : ENRAF-NONIUS FAST                  
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : PROCOR                             
REMARK 200  DATA SCALING SOFTWARE          : FBSCALE                            
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 33337                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.200                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 20.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 92.0                               
REMARK 200  DATA REDUNDANCY                : 3.500                              
REMARK 200  R MERGE                    (I) : NULL                               
REMARK 200  R SYM                      (I) : 0.05200                            
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) : 2.20                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.50                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 75.0                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : 0.22000                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 2.200                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: NULL                                           
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR                    
REMARK 200 SOFTWARE USED: AMORE                                                 
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 52.00                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.55                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 2.4M AMMONIUM SULFATE, 20MM, PH 8.0      
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 63                             
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -Y,X-Y,Z                                                
REMARK 290       3555   -X+Y,-X,Z                                               
REMARK 290       4555   -X,-Y,Z+1/2                                             
REMARK 290       5555   Y,-X+Y,Z+1/2                                            
REMARK 290       6555   X-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 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   3 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   3 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000       33.65000            
REMARK 290   SMTRY1   5  0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   5 -0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000       33.65000            
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       33.65000            
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                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 7660 ANGSTROM**2                          
REMARK 350 SURFACE AREA OF THE COMPLEX: 19130 ANGSTROM**2                       
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -24.0 KCAL/MOL                        
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B                                  
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    ARG B 243   NE  -  CZ  -  NH2 ANGL. DEV. =   3.4 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    VAL A  93     -159.07    -84.23                                   
REMARK 500    ASP A 122       50.33   -155.75                                   
REMARK 500    TYR B  94      -60.20    -26.48                                   
REMARK 500    ALA B 100       59.66   -149.68                                   
REMARK 500    ASP B 122       62.57   -152.64                                   
REMARK 500    PRO B 228     -168.56    -68.40                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE UMP A 265                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CB3 A 266                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE UMP B 266                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CB3 B 267                 
DBREF  1AIQ A    2   264  UNP    P0A884   TYSY_ECOLI       2    264             
DBREF  1AIQ B    2   264  UNP    P0A884   TYSY_ECOLI       2    264             
SEQADV 1AIQ GLU A  126  UNP  P0A884    ARG   126 ENGINEERED MUTATION            
SEQADV 1AIQ GLU B  126  UNP  P0A884    ARG   126 ENGINEERED MUTATION            
SEQRES   1 A  264  CXM LYS GLN TYR LEU GLU LEU MET GLN LYS VAL LEU ASP          
SEQRES   2 A  264  GLU GLY THR GLN LYS ASN ASP ARG THR GLY THR GLY THR          
SEQRES   3 A  264  LEU SER ILE PHE GLY HIS GLN MET ARG PHE ASN LEU GLN          
SEQRES   4 A  264  ASP GLY PHE PRO LEU VAL THR THR LYS ARG CYS HIS LEU          
SEQRES   5 A  264  ARG SER ILE ILE HIS GLU LEU LEU TRP PHE LEU GLN GLY          
SEQRES   6 A  264  ASP THR ASN ILE ALA TYR LEU HIS GLU ASN ASN VAL THR          
SEQRES   7 A  264  ILE TRP ASP GLU TRP ALA ASP GLU ASN GLY ASP LEU GLY          
SEQRES   8 A  264  PRO VAL TYR GLY LYS GLN TRP ARG ALA TRP PRO THR PRO          
SEQRES   9 A  264  ASP GLY ARG HIS ILE ASP GLN ILE THR THR VAL LEU ASN          
SEQRES  10 A  264  GLN LEU LYS ASN ASP PRO ASP SER GLU ARG ILE ILE VAL          
SEQRES  11 A  264  SER ALA TRP ASN VAL GLY GLU LEU ASP LYS MET ALA LEU          
SEQRES  12 A  264  ALA PRO CYS HIS ALA PHE PHE GLN PHE TYR VAL ALA ASP          
SEQRES  13 A  264  GLY LYS LEU SER CYS GLN LEU TYR GLN ARG SER CYS ASP          
SEQRES  14 A  264  VAL PHE LEU GLY LEU PRO PHE ASN ILE ALA SER TYR ALA          
SEQRES  15 A  264  LEU LEU VAL HIS MET MET ALA GLN GLN CYS ASP LEU GLU          
SEQRES  16 A  264  VAL GLY ASP PHE VAL TRP THR GLY GLY ASP THR HIS LEU          
SEQRES  17 A  264  TYR SER ASN HIS MET ASP GLN THR HIS LEU GLN LEU SER          
SEQRES  18 A  264  ARG GLU PRO ARG PRO LEU PRO LYS LEU ILE ILE LYS ARG          
SEQRES  19 A  264  LYS PRO GLU SER ILE PHE ASP TYR ARG PHE GLU ASP PHE          
SEQRES  20 A  264  GLU ILE GLU GLY TYR ASP PRO HIS PRO GLY ILE LYS ALA          
SEQRES  21 A  264  PRO VAL ALA ILE                                              
SEQRES   1 B  264  CXM LYS GLN TYR LEU GLU LEU MET GLN LYS VAL LEU ASP          
SEQRES   2 B  264  GLU GLY THR GLN LYS ASN ASP ARG THR GLY THR GLY THR          
SEQRES   3 B  264  LEU SER ILE PHE GLY HIS GLN MET ARG PHE ASN LEU GLN          
SEQRES   4 B  264  ASP GLY PHE PRO LEU VAL THR THR LYS ARG CYS HIS LEU          
SEQRES   5 B  264  ARG SER ILE ILE HIS GLU LEU LEU TRP PHE LEU GLN GLY          
SEQRES   6 B  264  ASP THR ASN ILE ALA TYR LEU HIS GLU ASN ASN VAL THR          
SEQRES   7 B  264  ILE TRP ASP GLU TRP ALA ASP GLU ASN GLY ASP LEU GLY          
SEQRES   8 B  264  PRO VAL TYR GLY LYS GLN TRP ARG ALA TRP PRO THR PRO          
SEQRES   9 B  264  ASP GLY ARG HIS ILE ASP GLN ILE THR THR VAL LEU ASN          
SEQRES  10 B  264  GLN LEU LYS ASN ASP PRO ASP SER GLU ARG ILE ILE VAL          
SEQRES  11 B  264  SER ALA TRP ASN VAL GLY GLU LEU ASP LYS MET ALA LEU          
SEQRES  12 B  264  ALA PRO CYS HIS ALA PHE PHE GLN PHE TYR VAL ALA ASP          
SEQRES  13 B  264  GLY LYS LEU SER CYS GLN LEU TYR GLN ARG SER CYS ASP          
SEQRES  14 B  264  VAL PHE LEU GLY LEU PRO PHE ASN ILE ALA SER TYR ALA          
SEQRES  15 B  264  LEU LEU VAL HIS MET MET ALA GLN GLN CYS ASP LEU GLU          
SEQRES  16 B  264  VAL GLY ASP PHE VAL TRP THR GLY GLY ASP THR HIS LEU          
SEQRES  17 B  264  TYR SER ASN HIS MET ASP GLN THR HIS LEU GLN LEU SER          
SEQRES  18 B  264  ARG GLU PRO ARG PRO LEU PRO LYS LEU ILE ILE LYS ARG          
SEQRES  19 B  264  LYS PRO GLU SER ILE PHE ASP TYR ARG PHE GLU ASP PHE          
SEQRES  20 B  264  GLU ILE GLU GLY TYR ASP PRO HIS PRO GLY ILE LYS ALA          
SEQRES  21 B  264  PRO VAL ALA ILE                                              
MODRES 1AIQ CXM A    1  MET  N-CARBOXYMETHIONINE                                
MODRES 1AIQ CXM B    1  MET  N-CARBOXYMETHIONINE                                
HET    CXM  A   1      11                                                       
HET    CXM  B   1      11                                                       
HET    UMP  A 265      20                                                       
HET    CB3  A 266      35                                                       
HET    UMP  B 266      20                                                       
HET    CB3  B 267      35                                                       
HETNAM     CXM N-CARBOXYMETHIONINE                                              
HETNAM     UMP 2'-DEOXYURIDINE 5'-MONOPHOSPHATE                                 
HETNAM     CB3 10-PROPARGYL-5,8-DIDEAZAFOLIC ACID                               
HETSYN     UMP DUMP                                                             
FORMUL   1  CXM    2(C6 H11 N O4 S)                                             
FORMUL   3  UMP    2(C9 H13 N2 O8 P)                                            
FORMUL   4  CB3    2(C24 H23 N5 O6)                                             
FORMUL   7  HOH   *176(H2 O)                                                    
HELIX    1   1 LYS A    2  GLU A   14  1                                  13    
HELIX    2   2 LEU A   52  GLN A   64  1                                  13    
HELIX    3   3 ALA A   70  GLU A   74  1                                   5    
HELIX    4   4 ASP A   81  TRP A   83  5                                   3    
HELIX    5   5 TYR A   94  ALA A  100  1                                   7    
HELIX    6   6 GLN A  111  ASN A  121  1                                  11    
HELIX    7   7 LEU A  138  LYS A  140  5                                   3    
HELIX    8   8 LEU A  174  GLN A  191  1                                  18    
HELIX    9   9 SER A  210  SER A  221  5                                  12    
HELIX   10  10 PHE A  244  ASP A  246  5                                   3    
HELIX   11  11 LYS B    2  GLU B   14  1                                  13    
HELIX   12  12 LEU B   38  ASP B   40  5                                   3    
HELIX   13  13 LEU B   52  GLN B   64  1                                  13    
HELIX   14  14 ILE B   69  GLU B   74  5                                   6    
HELIX   15  15 ASP B   81  TRP B   83  5                                   3    
HELIX   16  16 TYR B   94  ALA B  100  1                                   7    
HELIX   17  17 GLN B  111  ASN B  121  1                                  11    
HELIX   18  18 VAL B  135  LYS B  140  5                                   6    
HELIX   19  19 LEU B  174  GLN B  191  1                                  18    
HELIX   20  20 SER B  210  SER B  221  5                                  12    
HELIX   21  21 PHE B  244  ASP B  246  5                                   3    
SHEET    1   A 4 THR A  16  LYS A  18  0                                        
SHEET    2   A 4 THR A  26  PHE A  30 -1  N  SER A  28   O  THR A  16           
SHEET    3   A 4 ASP A 205  TYR A 209 -1  N  LEU A 208   O  LEU A  27           
SHEET    4   A 4 SER A 167  ASP A 169  1  N  CYS A 168   O  ASP A 205           
SHEET    1   B 5 HIS A  32  ASN A  37  0                                        
SHEET    2   B 5 ASP A 198  GLY A 203 -1  N  GLY A 203   O  HIS A  32           
SHEET    3   B 5 LYS A 158  GLN A 165  1  N  CYS A 161   O  VAL A 200           
SHEET    4   B 5 HIS A 147  ALA A 155 -1  N  ALA A 155   O  LYS A 158           
SHEET    5   B 5 ILE A 129  SER A 131 -1  N  VAL A 130   O  PHE A 150           
SHEET    1   C 2 LYS A 229  ILE A 232  0                                        
SHEET    2   C 2 PHE A 247  GLU A 250 -1  N  GLU A 250   O  LYS A 229           
SHEET    1   D 4 THR B  16  LYS B  18  0                                        
SHEET    2   D 4 THR B  26  PHE B  30 -1  N  SER B  28   O  THR B  16           
SHEET    3   D 4 ASP B 205  TYR B 209 -1  N  LEU B 208   O  LEU B  27           
SHEET    4   D 4 SER B 167  ASP B 169  1  N  CYS B 168   O  ASP B 205           
SHEET    1   E 5 HIS B  32  ASN B  37  0                                        
SHEET    2   E 5 ASP B 198  GLY B 203 -1  N  GLY B 203   O  HIS B  32           
SHEET    3   E 5 LYS B 158  GLN B 165  1  N  CYS B 161   O  VAL B 200           
SHEET    4   E 5 HIS B 147  ALA B 155 -1  N  ALA B 155   O  LYS B 158           
SHEET    5   E 5 ILE B 128  SER B 131 -1  N  VAL B 130   O  PHE B 150           
SHEET    1   F 2 LYS B 229  ILE B 232  0                                        
SHEET    2   F 2 PHE B 247  GLU B 250 -1  N  GLU B 250   O  LYS B 229           
LINK         C   CXM A   1                 N   LYS A   2     1555   1555  1.32  
LINK         SG  CYS A 146                 C6  UMP A 265     1555   1555  2.01  
LINK         C   CXM B   1                 N   LYS B   2     1555   1555  1.33  
SITE     1 AC1 16 ARG A  21  CYS A 146  HIS A 147  GLN A 165                    
SITE     2 AC1 16 ARG A 166  SER A 167  CYS A 168  ASP A 169                    
SITE     3 AC1 16 ASN A 177  HIS A 207  TYR A 209  CB3 A 266                    
SITE     4 AC1 16 HOH A 273  HOH A 426  HOH A 441  GLU B 126                    
SITE     1 AC2 17 HIS A  51  SER A  54  GLU A  58  ILE A  79                    
SITE     2 AC2 17 TRP A  80  TRP A  83  ASP A 169  GLY A 173                    
SITE     3 AC2 17 PHE A 176  ASN A 177  TYR A 209  VAL A 262                    
SITE     4 AC2 17 ALA A 263  UMP A 265  HOH A 274  HOH A 383                    
SITE     5 AC2 17 HOH A 384                                                     
SITE     1 AC3 14 GLU A 126  ARG B  21  CYS B 146  HIS B 147                    
SITE     2 AC3 14 GLN B 165  ARG B 166  SER B 167  CYS B 168                    
SITE     3 AC3 14 ASP B 169  ASN B 177  HIS B 207  TYR B 209                    
SITE     4 AC3 14 CB3 B 267  HOH B 380                                          
SITE     1 AC4 16 HIS B  51  SER B  54  GLU B  58  ILE B  79                    
SITE     2 AC4 16 TRP B  80  TRP B  83  ASP B 169  GLY B 173                    
SITE     3 AC4 16 ASN B 177  TYR B 209  ALA B 263  UMP B 266                    
SITE     4 AC4 16 HOH B 269  HOH B 339  HOH B 381  HOH B 382                    
CRYST1  126.610  126.610   67.300  90.00  90.00 120.00 P 63         12          
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      0.007898  0.004560  0.000000        0.00000                         
SCALE2      0.000000  0.009120  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.014859        0.00000                         
HETATM    1  N   CXM A   1      22.186  20.264  49.286  1.00 25.89           N  
HETATM    2  CA  CXM A   1      23.510  20.742  49.650  1.00 26.72           C  
HETATM    3  CB  CXM A   1      24.527  20.351  48.562  1.00 31.15           C  
HETATM    4  CG  CXM A   1      24.568  18.854  48.263  1.00 30.44           C  
HETATM    5  SD  CXM A   1      25.569  18.462  46.833  1.00 31.15           S  
HETATM    6  CE  CXM A   1      24.388  18.725  45.476  1.00 29.10           C  
HETATM    7  C   CXM A   1      23.473  22.236  49.790  1.00 29.28           C  
HETATM    8  O   CXM A   1      22.746  22.912  49.065  1.00 27.78           O  
HETATM    9  CN  CXM A   1      21.411  18.980  49.749  1.00 42.20           C  
HETATM   10  ON1 CXM A   1      22.006  18.090  50.381  1.00 28.21           O  
HETATM   11  ON2 CXM A   1      20.201  18.833  49.421  1.00 29.05           O