HEADER    TRANSCRIPTION                           18-SEP-04   1XHE               
TITLE     CRYSTAL STRUCTURE OF THE RECEIVER DOMAIN OF REDOX RESPONSE REGULATOR   
TITLE    2 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   6   03-APR-24 1XHE    1       REMARK                                    
REVDAT   5   14-FEB-24 1XHE    1       REMARK                                    
REVDAT   4   20-OCT-21 1XHE    1       SEQADV                                    
REVDAT   3   24-JUL-19 1XHE    1       REMARK                                    
REVDAT   2   24-FEB-09 1XHE    1       VERSN                                     
REVDAT   1   17-MAY-05 1XHE    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.    2.50 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 : MAXIMUM LIKELIHOOD WITH PHASES                 
REMARK   3                                                                       
REMARK   3  DATA USED IN REFINEMENT.                                             
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.50                            
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 30.00                           
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                           
REMARK   3   COMPLETENESS FOR RANGE        (%) : 98.7                            
REMARK   3   NUMBER OF REFLECTIONS             : 17076                           
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) : 0.215                            
REMARK   3   R VALUE            (WORKING SET) : 0.213                            
REMARK   3   FREE R VALUE                     : 0.256                            
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.100                            
REMARK   3   FREE R VALUE TEST SET COUNT      : 864                              
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) : 2.50                          
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.56                          
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 1133                          
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                          
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2560                        
REMARK   3   BIN FREE R VALUE SET COUNT          : 57                            
REMARK   3   BIN FREE R VALUE                    : 0.3300                        
REMARK   3                                                                       
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                     
REMARK   3   PROTEIN ATOMS            : 1921                                     
REMARK   3   NUCLEIC ACID ATOMS       : 0                                        
REMARK   3   HETEROGEN ATOMS          : 0                                        
REMARK   3   SOLVENT ATOMS            : 69                                       
REMARK   3                                                                       
REMARK   3  B VALUES.                                                            
REMARK   3   FROM WILSON PLOT           (A**2) : 31.70                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 42.62                           
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                        
REMARK   3    B11 (A**2) : 1.41000                                               
REMARK   3    B22 (A**2) : 1.41000                                               
REMARK   3    B33 (A**2) : -2.12000                                              
REMARK   3    B12 (A**2) : 0.71000                                               
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): 0.267          
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.230          
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.144          
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 6.545          
REMARK   3                                                                       
REMARK   3 CORRELATION COEFFICIENTS.                                             
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.934                          
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.891                          
REMARK   3                                                                       
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT       
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  1945 ; 0.017 ; 0.022        
REMARK   3   BOND LENGTHS OTHERS               (A):  NULL ;  NULL ;  NULL        
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  2633 ; 1.615 ; 1.980        
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  NULL ;  NULL ;  NULL        
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   241 ; 6.605 ; 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):   313 ; 0.101 ; 0.200        
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  1451 ; 0.006 ; 0.020        
REMARK   3   GENERAL PLANES OTHERS             (A):  NULL ;  NULL ;  NULL        
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):   908 ; 0.248 ; 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):   193 ; 0.175 ; 0.500        
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL        
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):  NULL ;  NULL ;  NULL        
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL        
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):    27 ; 0.163 ; 0.300        
REMARK   3   SYMMETRY VDW OTHERS               (A):  NULL ;  NULL ;  NULL        
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):    16 ; 0.254 ; 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 ; 1.763 ; 2.000        
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL        
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  1951 ; 3.137 ; 3.000        
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL        
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):   738 ; 1.647 ; 2.000        
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL        
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):   682 ; 2.680 ; 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 : NULL                               
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 1XHE 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_1000030363.                                    
REMARK 200                                                                       
REMARK 200 EXPERIMENTAL DETAILS                                                  
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                   
REMARK 200  DATE OF DATA COLLECTION        : 25-SEP-03; 25-SEP-03                
REMARK 200  TEMPERATURE           (KELVIN) : 100; 100                            
REMARK 200  PH                             : 5.5                                 
REMARK 200  NUMBER OF CRYSTALS USED        : 2                                   
REMARK 200                                                                       
REMARK 200  SYNCHROTRON              (Y/N) : Y; Y                                
REMARK 200  RADIATION SOURCE               : NSLS; NSLS                          
REMARK 200  BEAMLINE                       : X4A; X4A                            
REMARK 200  X-RAY GENERATOR MODEL          : NULL; NULL                          
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M; M                                
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.97896; 0.97139                    
REMARK 200  MONOCHROMATOR                  : KOHZU DOUBLE CRYSTAL                
REMARK 200                                   MONOCHROMATOR WITH A SAGITTALLY     
REMARK 200                                   FOCUSED SECOND CRYSTAL. CRYSTAL     
REMARK 200                                   TYPE IS SI(111); KOHZU DOUBLE       
REMARK 200                                   CRYSTAL MONOCHROMATOR WITH A        
REMARK 200                                   SAGITTALLY FOCUSED SECOND           
REMARK 200                                   CRYSTAL. CRYSTAL TYPE IS SI(111)    
REMARK 200  OPTICS                         : NULL; NULL                          
REMARK 200                                                                       
REMARK 200  DETECTOR TYPE                  : CCD; CCD                            
REMARK 200  DETECTOR MANUFACTURER          : ADSC QUANTUM 4; ADSC QUANTUM 4      
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                               
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                           
REMARK 200                                                                       
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 17085                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.500                               
REMARK 200  RESOLUTION RANGE LOW       (A) : 74.536                              
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : -3.000                              
REMARK 200                                                                       
REMARK 200 OVERALL.                                                              
REMARK 200  COMPLETENESS FOR RANGE     (%) : 98.3                                
REMARK 200  DATA REDUNDANCY                : NULL                                
REMARK 200  R MERGE                    (I) : NULL                                
REMARK 200  R SYM                      (I) : NULL                                
REMARK 200   FOR THE DATA SET  : 18.2000                             
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) : 2.59                      
REMARK 200  COMPLETENESS FOR SHELL     (%) : 95.6                                
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                                
REMARK 200  R MERGE FOR SHELL          (I) : NULL                                
REMARK 200  R SYM FOR SHELL            (I) : NULL                                
REMARK 200   FOR SHELL         : 2.900                               
REMARK 200                                                                       
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH; SINGLE WAVELENGTH            
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: SAD                           
REMARK 200 SOFTWARE USED: CNS                                                    
REMARK 200 STARTING MODEL: PEAK-WAVELENGTH DERIVED PHASES                        
REMARK 200                                                                       
REMARK 200 REMARK: NULL                                                          
REMARK 280                                                                       
REMARK 280 CRYSTAL                                                               
REMARK 280 SOLVENT CONTENT, VS   (%): 70.20                                      
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 4.18                      
REMARK 280                                                                       
REMARK 280 CRYSTALLIZATION CONDITIONS: AMMONIUM ACETATE, MPD, SODIUM CITRATE,    
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      143.14000             
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       71.57000             
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      107.35500             
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       35.78500             
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      178.92500             
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      143.14000             
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       71.57000             
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       35.78500             
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      107.35500             
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      178.92500             
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 375                                                                       
REMARK 375 SPECIAL POSITION                                                      
REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS             
REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL           
REMARK 375 POSITIONS.                                                            
REMARK 375                                                                       
REMARK 375 ATOM RES CSSEQI                                                       
REMARK 375      HOH A 157  LIES ON A SPECIAL POSITION.                           
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     GLN A   123                                                       
REMARK 465     MET B     1                                                       
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     GLU A  45    CG   CD   OE1  OE2                                   
REMARK 470     ARG B  83    CG   CD   NE   CZ   NH1  NH2                         
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  11   CB  -  CG  -  OD1 ANGL. DEV. =   5.8 DEGREES           
REMARK 500    ASP A  35   CB  -  CG  -  OD1 ANGL. DEV. =   7.6 DEGREES           
REMARK 500    ASP A  88   CB  -  CG  -  OD1 ANGL. DEV. =   5.9 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    ALA A  25        9.02    -62.09                                    
REMARK 500    ASN A  85      107.25   -166.85                                    
REMARK 500    ASN B  85      111.12   -165.68                                    
REMARK 500                                                                       
REMARK 500 REMARK: NULL                                                          
REMARK 900                                                                       
REMARK 900 RELATED ENTRIES                                                       
REMARK 900 RELATED ID: 1XHF   RELATED DB: PDB                                    
DBREF  1XHE A    1   123  UNP    P0A9Q1   ARCA_ECOLI       1    123              
DBREF  1XHE B    1   123  UNP    P0A9Q1   ARCA_ECOLI       1    123              
SEQADV 1XHE GLN A  123  UNP  P0A9Q1    ASN   123 ENGINEERED MUTATION             
SEQADV 1XHE GLN B  123  UNP  P0A9Q1    ASN   123 ENGINEERED MUTATION             
SEQRES   1 A  123  MET 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 MET           
SEQRES   4 A  123  HIS GLN ILE LEU SER GLU TYR ASP ILE ASN LEU VAL ILE           
SEQRES   5 A  123  MET 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 MET           
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 MET GLN                                       
SEQRES   1 B  123  MET 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 MET           
SEQRES   4 B  123  HIS GLN ILE LEU SER GLU TYR ASP ILE ASN LEU VAL ILE           
SEQRES   5 B  123  MET 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 MET           
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 MET GLN                                       
FORMUL   3  HOH   *69(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  MET 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  ILE B   95  1                                  11     
HELIX   10  10 ASN B  106  MET 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  ASP A  54  1  O  ILE A  52   N  VAL A   9            
SHEET    4   A 5 ALA A  76  THR A  81  1  O  MET A  78   N  VAL A  51            
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  ASP B  54  1  O  LEU B  50   N  LEU B   7            
SHEET    4   B 5 ALA B  76  THR B  81  1  O  LEU B  80   N  MET B  53            
SHEET    5   B 5 ASP B  99  THR B 102  1  O  ILE B 101   N  PHE B  79            
CISPEP   1 LYS A  103    PRO A  104          0        -3.90                      
CISPEP   2 LYS B  103    PRO B  104          0       -10.08                      
CRYST1   86.695   86.695  214.710  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      0.011535  0.006660  0.000000        0.00000                          
SCALE2      0.000000  0.013319  0.000000        0.00000                          
SCALE3      0.000000  0.000000  0.004657        0.00000                          
END