HEADER    TRANSCRIPTION                           18-SEP-04   1XHF              
TITLE     CRYSTAL STRUCTURE OF THE BEF3-ACTIVATED RECEIVER DOMAIN OF REDOX      
TITLE    2 RESPONSE REGULATOR ARCA                                              
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: AEROBIC RESPIRATION CONTROL PROTEIN ARCA;                  
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 FRAGMENT: RECEIVER DOMAIN;                                           
COMPND   5 SYNONYM: REDOX RESPONSE REGULATOR ARCA; DYE RESISTANCE PROTEIN;      
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 GENE: ARCA, DYE, FEXA, SFRA, SEG, MSP, CPXC;                         
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE   6 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE   7 EXPRESSION_SYSTEM_STRAIN: B834(DE3)PLYSS AND BL21(DE3);              
SOURCE   8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE   9 EXPRESSION_SYSTEM_PLASMID: PEF29 (PJES307 DERIVATIVE)                
KEYWDS    TWO-COMPONENT SYSTEM; GENE REGULATION; TRANSCRIPTION FACTOR; ANOXIC   
KEYWDS   2 REDOX CONTROL; DOUBLY WOUND FIVE-STRANDED BETA/ALPHA FOLD,           
KEYWDS   3 TRANSCRIPTION                                                        
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    A.TORO-ROMAN,T.R.MACK,A.M.STOCK                                       
REVDAT   4   06-NOV-24 1XHF    1       REMARK                                   
REVDAT   3   20-OCT-21 1XHF    1       REMARK SEQADV LINK                       
REVDAT   2   24-FEB-09 1XHF    1       VERSN                                    
REVDAT   1   17-MAY-05 1XHF    0                                                
JRNL        AUTH   A.TORO-ROMAN,T.R.MACK,A.M.STOCK                              
JRNL        TITL   STRUCTURAL ANALYSIS AND SOLUTION STUDIES OF THE ACTIVATED    
JRNL        TITL 2 REGULATORY DOMAIN OF THE RESPONSE REGULATOR ARCA: A          
JRNL        TITL 3 SYMMETRIC DIMER MEDIATED BY THE ALPHA4-BETA5-ALPHA5 FACE     
JRNL        REF    J.MOL.BIOL.                   V. 349    11 2005              
JRNL        REFN                   ISSN 0022-2836                               
JRNL        PMID   15876365                                                     
JRNL        DOI    10.1016/J.JMB.2005.03.059                                    
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.15 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.1.24                                        
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,              
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                             
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : NULL                                          
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.15                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 30.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 99.9                           
REMARK   3   NUMBER OF REFLECTIONS             : 26206                          
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 + TEST SET) : 0.190                           
REMARK   3   R VALUE            (WORKING SET) : 0.187                           
REMARK   3   FREE R VALUE                     : 0.212                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 10.100                          
REMARK   3   FREE R VALUE TEST SET COUNT      : 2641                            
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 20                           
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.15                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.21                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 1668                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2200                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 193                          
REMARK   3   BIN FREE R VALUE                    : 0.2560                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 1923                                    
REMARK   3   NUCLEIC ACID ATOMS       : 0                                       
REMARK   3   HETEROGEN ATOMS          : 22                                      
REMARK   3   SOLVENT ATOMS            : 117                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 15.10                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 29.17                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 1.09000                                              
REMARK   3    B22 (A**2) : 1.09000                                              
REMARK   3    B33 (A**2) : -1.64000                                             
REMARK   3    B12 (A**2) : 0.55000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.153         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.140         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.091         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 3.481         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.950                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.937                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  1962 ; 0.017 ; 0.022       
REMARK   3   BOND LENGTHS OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  2651 ; 1.445 ; 1.980       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   241 ; 6.067 ; 5.000       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   314 ; 0.101 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  1452 ; 0.006 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):   891 ; 0.209 ; 0.300       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):   268 ; 0.186 ; 0.500       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):     3 ; 0.123 ; 0.500       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):    41 ; 0.202 ; 0.300       
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):    16 ; 0.207 ; 0.500       
REMARK   3   SYMMETRY H-BOND OTHERS            (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.     COUNT   RMS    WEIGHT      
REMARK   3   MAIN-CHAIN BOND REFINED ATOMS  (A**2):  1207 ; 1.417 ; 2.000       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  1951 ; 2.438 ; 3.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):   755 ; 1.925 ; 2.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):   700 ; 2.900 ; 3.000       
REMARK   3   SIDE-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B REFINED ATOMS     (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B OTHER ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3 ANISOTROPIC THERMAL FACTOR RESTRAINTS.    COUNT   RMS   WEIGHT       
REMARK   3   RIGID-BOND RESTRAINTS          (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; FREE ATOMS         (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; BONDED ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS STATISTICS                                           
REMARK   3   NUMBER OF DIFFERENT NCS GROUPS : 1                                 
REMARK   3                                                                      
REMARK   3  NCS GROUP NUMBER               : 1                                  
REMARK   3     CHAIN NAMES                    : A B                             
REMARK   3     NUMBER OF COMPONENTS NCS GROUP : 1                               
REMARK   3       COMPONENT C  SSSEQI  TO  C   SSSEQI   CODE                     
REMARK   3           1     A      3       A     122      6                      
REMARK   3           1     B      3       B     122      6                      
REMARK   3                   GROUP CHAIN        COUNT   RMS     WEIGHT          
REMARK   3   LOOSE POSITIONAL   1    A    (A):    945 ;  0.34 ;  5.00           
REMARK   3   LOOSE THERMAL      1    A (A**2):    945 ;  3.27 ; 10.00           
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : NULL                                       
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED : BABINET MODEL WITH MASK                              
REMARK   3   PARAMETERS FOR MASK CALCULATION                                    
REMARK   3   VDW PROBE RADIUS   : 1.40                                          
REMARK   3   ION PROBE RADIUS   : 0.80                                          
REMARK   3   SHRINKAGE RADIUS   : 0.80                                          
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1XHF COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 30-SEP-04.                  
REMARK 100 THE DEPOSITION ID IS D_1000030364.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 26-FEB-04                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 5.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : NSLS                               
REMARK 200  BEAMLINE                       : X4A                                
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.97176                            
REMARK 200  MONOCHROMATOR                  : KOHZU DOUBLE CRYSTAL               
REMARK 200                                   MONOCHROMATOR WITH A SAGITTALLY    
REMARK 200                                   FOCUSED SECOND CRYSTAL. CRYSTAL    
REMARK 200                                   TYPE IS SI(111)                    
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 4                     
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 26280                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.150                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 30.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : -3.000                             
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 100.0                              
REMARK 200  DATA REDUNDANCY                : 8.500                              
REMARK 200  R MERGE                    (I) : NULL                               
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) : 2.15                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.23                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 100.0                              
REMARK 200  DATA REDUNDANCY IN SHELL       : 6.80                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 3.700                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: PHASER 1.2                                            
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 68.70                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.96                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: AMMONIUM ACETATE, MPD, SODIUM ACETATE,   
REMARK 280  PH 5.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 277K             
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 65 2 2                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -Y,X-Y,Z+2/3                                            
REMARK 290       3555   -X+Y,-X,Z+1/3                                           
REMARK 290       4555   -X,-Y,Z+1/2                                             
REMARK 290       5555   Y,-X+Y,Z+1/6                                            
REMARK 290       6555   X-Y,X,Z+5/6                                             
REMARK 290       7555   Y,X,-Z+2/3                                              
REMARK 290       8555   X-Y,-Y,-Z                                               
REMARK 290       9555   -X,-X+Y,-Z+1/3                                          
REMARK 290      10555   -Y,-X,-Z+1/6                                            
REMARK 290      11555   -X+Y,Y,-Z+1/2                                           
REMARK 290      12555   X,X-Y,-Z+5/6                                            
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      142.05467            
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       71.02733            
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      106.54100            
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       35.51367            
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      177.56833            
REMARK 290   SMTRY1   7 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   7  0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000      142.05467            
REMARK 290   SMTRY1   8  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   8  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   8  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   9 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   9 -0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   9  0.000000  0.000000 -1.000000       71.02733            
REMARK 290   SMTRY1  10  0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  10 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3  10  0.000000  0.000000 -1.000000       35.51367            
REMARK 290   SMTRY1  11 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2  11  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3  11  0.000000  0.000000 -1.000000      106.54100            
REMARK 290   SMTRY1  12  0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  12  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3  12  0.000000  0.000000 -1.000000      177.56833            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 300 REMARK: BIOLOGICAL ASSEMBLY IS A HOMODIMER PRESENT IN THE            
REMARK 300 ASSYMETRIC UNIT.                                                     
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 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 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     MSE A     1                                                      
REMARK 465     GLN A   123                                                      
REMARK 465     GLN B   123                                                      
REMARK 470                                                                      
REMARK 470 MISSING ATOM                                                         
REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER;           
REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 470 I=INSERTION CODE):                                                   
REMARK 470   M RES CSSEQI  ATOMS                                                
REMARK 470     GLN A   2    CG   CD   OE1  NE2                                  
REMARK 470     MSE B   1    CG  SE    CE                                        
REMARK 470     GLU B  71    CG   CD   OE1  OE2                                  
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    ASP A  35   CB  -  CG  -  OD2 ANGL. DEV. =   7.4 DEGREES          
REMARK 500    ASP A  84   CB  -  CG  -  OD2 ANGL. DEV. =   6.4 DEGREES          
REMARK 500    ASP B  11   CB  -  CG  -  OD2 ANGL. DEV. =   6.5 DEGREES          
REMARK 500    ASP B  29   CB  -  CG  -  OD2 ANGL. DEV. =   5.6 DEGREES          
REMARK 500    ASP B  99   CB  -  CG  -  OD2 ANGL. DEV. =   5.6 DEGREES          
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 A1001  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP A  11   OD2                                                    
REMARK 620 2 ASP A  54   OD2  86.7                                              
REMARK 620 3 ASN A  56   O    89.7  89.3                                        
REMARK 620 4 BEF A2001   F1  170.2  84.3  94.1                                  
REMARK 620 5 HOH A2016   O    95.5 171.2  99.3  92.8                            
REMARK 620 6 HOH A2047   O    91.4  82.0 171.2  83.5  89.3                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                             BEF A2001  BE                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP A  54   OD1                                                    
REMARK 620 2 BEF A2001   F1  113.4                                              
REMARK 620 3 BEF A2001   F2  101.8 109.2                                        
REMARK 620 4 BEF A2001   F3  111.9 110.5 109.7                                  
REMARK 620 N                    1     2     3                                   
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG B1002  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP B  11   OD2                                                    
REMARK 620 2 ASP B  54   OD2  87.6                                              
REMARK 620 3 ASN B  56   O    90.4  96.5                                        
REMARK 620 4 BEF B2002   F1  167.7  89.9 101.9                                  
REMARK 620 5 HOH B4008   O    84.9  86.9 174.1  82.9                            
REMARK 620 6 HOH B4052   O    87.7 172.6  89.2  93.5  87.0                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                             BEF B2002  BE                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 ASP B  54   OD1                                                    
REMARK 620 2 BEF B2002   F1  113.0                                              
REMARK 620 3 BEF B2002   F2  103.4 109.6                                        
REMARK 620 4 BEF B2002   F3  110.8 109.8 110.0                                  
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 A 1001                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG B 1002                 
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BEF A 2001                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BEF B 2002                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BEF B 2003                
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BF2 B 4001                
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1XHE   RELATED DB: PDB                                   
DBREF  1XHF A    1   123  UNP    P0A9Q1   ARCA_ECOLI       1    123             
DBREF  1XHF B    1   123  UNP    P0A9Q1   ARCA_ECOLI       1    123             
SEQADV 1XHF MSE A    1  UNP  P0A9Q1    MET     1 MODIFIED RESIDUE               
SEQADV 1XHF MSE A   39  UNP  P0A9Q1    MET    39 MODIFIED RESIDUE               
SEQADV 1XHF MSE A   53  UNP  P0A9Q1    MET    53 MODIFIED RESIDUE               
SEQADV 1XHF MSE A   78  UNP  P0A9Q1    MET    78 MODIFIED RESIDUE               
SEQADV 1XHF MSE A  122  UNP  P0A9Q1    MET   122 MODIFIED RESIDUE               
SEQADV 1XHF GLN A  123  UNP  P0A9Q1    ASN   123 ENGINEERED MUTATION            
SEQADV 1XHF MSE B    1  UNP  P0A9Q1    MET     1 MODIFIED RESIDUE               
SEQADV 1XHF MSE B   39  UNP  P0A9Q1    MET    39 MODIFIED RESIDUE               
SEQADV 1XHF MSE B   53  UNP  P0A9Q1    MET    53 MODIFIED RESIDUE               
SEQADV 1XHF MSE B   78  UNP  P0A9Q1    MET    78 MODIFIED RESIDUE               
SEQADV 1XHF MSE B  122  UNP  P0A9Q1    MET   122 MODIFIED RESIDUE               
SEQADV 1XHF GLN B  123  UNP  P0A9Q1    ASN   123 ENGINEERED MUTATION            
SEQRES   1 A  123  MSE GLN THR PRO HIS ILE LEU ILE VAL GLU ASP GLU LEU          
SEQRES   2 A  123  VAL THR ARG ASN THR LEU LYS SER ILE PHE GLU ALA GLU          
SEQRES   3 A  123  GLY TYR ASP VAL PHE GLU ALA THR ASP GLY ALA GLU MSE          
SEQRES   4 A  123  HIS GLN ILE LEU SER GLU TYR ASP ILE ASN LEU VAL ILE          
SEQRES   5 A  123  MSE ASP ILE ASN LEU PRO GLY LYS ASN GLY LEU LEU LEU          
SEQRES   6 A  123  ALA ARG GLU LEU ARG GLU GLN ALA ASN VAL ALA LEU MSE          
SEQRES   7 A  123  PHE LEU THR GLY ARG ASP ASN GLU VAL ASP LYS ILE LEU          
SEQRES   8 A  123  GLY LEU GLU ILE GLY ALA ASP ASP TYR ILE THR LYS PRO          
SEQRES   9 A  123  PHE ASN PRO ARG GLU LEU THR ILE ARG ALA ARG ASN LEU          
SEQRES  10 A  123  LEU SER ARG THR MSE GLN                                      
SEQRES   1 B  123  MSE GLN THR PRO HIS ILE LEU ILE VAL GLU ASP GLU LEU          
SEQRES   2 B  123  VAL THR ARG ASN THR LEU LYS SER ILE PHE GLU ALA GLU          
SEQRES   3 B  123  GLY TYR ASP VAL PHE GLU ALA THR ASP GLY ALA GLU MSE          
SEQRES   4 B  123  HIS GLN ILE LEU SER GLU TYR ASP ILE ASN LEU VAL ILE          
SEQRES   5 B  123  MSE ASP ILE ASN LEU PRO GLY LYS ASN GLY LEU LEU LEU          
SEQRES   6 B  123  ALA ARG GLU LEU ARG GLU GLN ALA ASN VAL ALA LEU MSE          
SEQRES   7 B  123  PHE LEU THR GLY ARG ASP ASN GLU VAL ASP LYS ILE LEU          
SEQRES   8 B  123  GLY LEU GLU ILE GLY ALA ASP ASP TYR ILE THR LYS PRO          
SEQRES   9 B  123  PHE ASN PRO ARG GLU LEU THR ILE ARG ALA ARG ASN LEU          
SEQRES  10 B  123  LEU SER ARG THR MSE GLN                                      
MODRES 1XHF MSE A   39  MET  SELENOMETHIONINE                                   
MODRES 1XHF MSE A   53  MET  SELENOMETHIONINE                                   
MODRES 1XHF MSE A   78  MET  SELENOMETHIONINE                                   
MODRES 1XHF MSE A  122  MET  SELENOMETHIONINE                                   
MODRES 1XHF MSE B    1  MET  SELENOMETHIONINE                                   
MODRES 1XHF MSE B   39  MET  SELENOMETHIONINE                                   
MODRES 1XHF MSE B   53  MET  SELENOMETHIONINE                                   
MODRES 1XHF MSE B   78  MET  SELENOMETHIONINE                                   
MODRES 1XHF MSE B  122  MET  SELENOMETHIONINE                                   
HET    MSE  A  39       8                                                       
HET    MSE  A  53       8                                                       
HET    MSE  A  78       8                                                       
HET    MSE  A 122       8                                                       
HET    MSE  B   1       5                                                       
HET    MSE  B  39       8                                                       
HET    MSE  B  53       8                                                       
HET    MSE  B  78       8                                                       
HET    MSE  B 122       8                                                       
HET     MG  A1001       1                                                       
HET    BEF  A2001       4                                                       
HET     MG  B1002       1                                                       
HET    BEF  B2002       4                                                       
HET    BEF  B2003       4                                                       
HET    BF4  B3001       5                                                       
HET    BF2  B4001       3                                                       
HETNAM     MSE SELENOMETHIONINE                                                 
HETNAM      MG MAGNESIUM ION                                                    
HETNAM     BEF BERYLLIUM TRIFLUORIDE ION                                        
HETNAM     BF4 BERYLLIUM TETRAFLUORIDE ION                                      
HETNAM     BF2 BERYLLIUM DIFLUORIDE                                             
FORMUL   1  MSE    9(C5 H11 N O2 SE)                                            
FORMUL   3   MG    2(MG 2+)                                                     
FORMUL   4  BEF    3(BE F3 1-)                                                  
FORMUL   8  BF4    BE F4 2-                                                     
FORMUL   9  BF2    BE F2                                                        
FORMUL  10  HOH   *117(H2 O)                                                    
HELIX    1   1 GLU A   12  ALA A   25  1                                  14    
HELIX    2   2 ASP A   35  TYR A   46  1                                  12    
HELIX    3   3 ASN A   61  ALA A   73  1                                  13    
HELIX    4   4 ASN A   85  GLY A   96  1                                  12    
HELIX    5   5 ASN A  106  MSE A  122  1                                  17    
HELIX    6   6 GLU B   12  ALA B   25  1                                  14    
HELIX    7   7 ASP B   35  TYR B   46  1                                  12    
HELIX    8   8 ASN B   61  ALA B   73  1                                  13    
HELIX    9   9 ASN B   85  GLY B   96  1                                  12    
HELIX   10  10 ASN B  106  MSE B  122  1                                  17    
SHEET    1   A 5 ASP A  29  ALA A  33  0                                        
SHEET    2   A 5 HIS A   5  VAL A   9  1  N  ILE A   6   O  PHE A  31           
SHEET    3   A 5 LEU A  50  MSE A  53  1  O  LEU A  50   N  LEU A   7           
SHEET    4   A 5 ALA A  76  THR A  81  1  O  MSE A  78   N  MSE A  53           
SHEET    5   A 5 ASP A  99  THR A 102  1  O  ILE A 101   N  PHE A  79           
SHEET    1   B 5 ASP B  29  ALA B  33  0                                        
SHEET    2   B 5 HIS B   5  VAL B   9  1  N  ILE B   6   O  PHE B  31           
SHEET    3   B 5 LEU B  50  MSE B  53  1  O  ILE B  52   N  LEU B   7           
SHEET    4   B 5 ALA B  76  THR B  81  1  O  MSE B  78   N  MSE B  53           
SHEET    5   B 5 ASP B  99  THR B 102  1  O  ILE B 101   N  PHE B  79           
LINK         C   GLU A  38                 N   MSE A  39     1555   1555  1.34  
LINK         C   MSE A  39                 N   HIS A  40     1555   1555  1.34  
LINK         C   ILE A  52                 N   MSE A  53     1555   1555  1.33  
LINK         C   MSE A  53                 N   ASP A  54     1555   1555  1.32  
LINK         C   LEU A  77                 N   MSE A  78     1555   1555  1.32  
LINK         C   MSE A  78                 N   PHE A  79     1555   1555  1.32  
LINK         C   THR A 121                 N   MSE A 122     1555   1555  1.33  
LINK         C   MSE B   1                 N   GLN B   2     1555   1555  1.32  
LINK         C   GLU B  38                 N   MSE B  39     1555   1555  1.33  
LINK         C   MSE B  39                 N   HIS B  40     1555   1555  1.34  
LINK         C   ILE B  52                 N   MSE B  53     1555   1555  1.34  
LINK         C   MSE B  53                 N   ASP B  54     1555   1555  1.32  
LINK         C   LEU B  77                 N   MSE B  78     1555   1555  1.32  
LINK         C   MSE B  78                 N   PHE B  79     1555   1555  1.33  
LINK         C   THR B 121                 N   MSE B 122     1555   1555  1.33  
LINK         OD2 ASP A  11                MG    MG A1001     1555   1555  2.16  
LINK         OD2 ASP A  54                MG    MG A1001     1555   1555  2.06  
LINK         OD1 ASP A  54                BE   BEF A2001     1555   1555  1.51  
LINK         O   ASN A  56                MG    MG A1001     1555   1555  2.06  
LINK        MG    MG A1001                 F1  BEF A2001     1555   1555  2.01  
LINK        MG    MG A1001                 O   HOH A2016     1555   1555  1.94  
LINK        MG    MG A1001                 O   HOH A2047     1555   1555  2.17  
LINK         OD2 ASP B  11                MG    MG B1002     1555   1555  2.10  
LINK         OD2 ASP B  54                MG    MG B1002     1555   1555  2.03  
LINK         OD1 ASP B  54                BE   BEF B2002     1555   1555  1.59  
LINK         O   ASN B  56                MG    MG B1002     1555   1555  2.04  
LINK        MG    MG B1002                 F1  BEF B2002     1555   1555  2.04  
LINK        MG    MG B1002                 O   HOH B4008     1555   1555  2.01  
LINK        MG    MG B1002                 O   HOH B4052     1555   1555  2.01  
CISPEP   1 LYS A  103    PRO A  104          0        -2.45                     
CISPEP   2 LYS B  103    PRO B  104          0         2.85                     
SITE     1 AC1  6 ASP A  11  ASP A  54  ASN A  56  BEF A2001                    
SITE     2 AC1  6 HOH A2016  HOH A2047                                          
SITE     1 AC2  6 ASP B  11  ASP B  54  ASN B  56  BEF B2002                    
SITE     2 AC2  6 HOH B4008  HOH B4052                                          
SITE     1 AC3  9 ASP A  54  ILE A  55  ASN A  56  THR A  81                    
SITE     2 AC3  9 GLY A  82  LYS A 103   MG A1001  HOH A2016                    
SITE     3 AC3  9 HOH A2047                                                     
SITE     1 AC4  9 ASP B  54  ILE B  55  ASN B  56  THR B  81                    
SITE     2 AC4  9 GLY B  82  LYS B 103   MG B1002  HOH B4008                    
SITE     3 AC4  9 HOH B4052                                                     
SITE     1 AC5  2 ARG A  70  ASN A  74                                          
SITE     1 AC6  2 ARG B  70  ASN B  74                                          
CRYST1   86.169   86.169  213.082  90.00  90.00 120.00 P 65 2 2     24          
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      0.011605  0.006700  0.000000        0.00000                         
SCALE2      0.000000  0.013400  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.004693        0.00000