HEADER    DNA BINDING PROTEIN/DNA                 13-NOV-03   1RH6              
TITLE     BACTERIOPHAGE LAMBDA EXCISIONASE (XIS)-DNA COMPLEX                    
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: 5'-D(*CP*TP*AP*TP*GP*TP*AP*GP*TP*CP*TP*GP*TP*TP*G)-3';     
COMPND   3 CHAIN: C;                                                            
COMPND   4 ENGINEERED: YES;                                                     
COMPND   5 MOL_ID: 2;                                                           
COMPND   6 MOLECULE: 5'-D(P*CP*AP*AP*CP*AP*GP*AP*CP*TP*AP*CP*AP*TP*AP*G)-3';    
COMPND   7 CHAIN: D;                                                            
COMPND   8 ENGINEERED: YES;                                                     
COMPND   9 MOL_ID: 3;                                                           
COMPND  10 MOLECULE: EXCISIONASE;                                               
COMPND  11 CHAIN: A, B;                                                         
COMPND  12 FRAGMENT: XIS DBD (RESIDUES 1-55);                                   
COMPND  13 ENGINEERED: YES;                                                     
COMPND  14 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 SYNTHETIC: YES;                                                      
SOURCE   3 MOL_ID: 2;                                                           
SOURCE   4 SYNTHETIC: YES;                                                      
SOURCE   5 MOL_ID: 3;                                                           
SOURCE   6 ORGANISM_SCIENTIFIC: ENTEROBACTERIA PHAGE LAMBDA;                    
SOURCE   7 ORGANISM_TAXID: 10710;                                               
SOURCE   8 GENE: XIS;                                                           
SOURCE   9 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE  10 EXPRESSION_SYSTEM_TAXID: 562;                                        
SOURCE  11 EXPRESSION_SYSTEM_STRAIN: RJ3386 (BL21-DE3);                         
SOURCE  12 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID;                              
SOURCE  13 EXPRESSION_SYSTEM_PLASMID: PET11A                                    
KEYWDS    PROTEIN-DNA COMPLEX, DNA ARCHITECTURAL PROTEIN, 'WINGED'-HELIX        
KEYWDS   2 PROTEIN, PHAGE EXCISION, SITE-SPECIFIC DNA RECOMBINATION, DNA        
KEYWDS   3 BINDING PROTEIN-DNA COMPLEX                                          
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    M.D.SAM,D.CASCIO,R.C.JOHNSON,R.T.CLUBB                                
REVDAT   5   14-FEB-24 1RH6    1       REMARK                                   
REVDAT   4   27-OCT-21 1RH6    1       REMARK SEQADV                            
REVDAT   3   09-MAY-12 1RH6    1       REMARK VERSN                             
REVDAT   2   24-FEB-09 1RH6    1       VERSN                                    
REVDAT   1   29-JUN-04 1RH6    0                                                
JRNL        AUTH   M.D.SAM,D.CASCIO,R.C.JOHNSON,R.T.CLUBB                       
JRNL        TITL   CRYSTAL STRUCTURE OF THE EXCISIONASE-DNA COMPLEX FROM        
JRNL        TITL 2 BACTERIOPHAGE LAMBDA.                                        
JRNL        REF    J.MOL.BIOL.                   V. 338   229 2004              
JRNL        REFN                   ISSN 0022-2836                               
JRNL        PMID   15066428                                                     
JRNL        DOI    10.1016/J.JMB.2004.02.053                                    
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.70 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.1.19                                        
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,              
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                             
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : MAXIMUM LIKELIHOOD                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.70                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 20.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 3.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 97.3                           
REMARK   3   NUMBER OF REFLECTIONS             : 21990                          
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) : 0.193                           
REMARK   3   R VALUE            (WORKING SET) : 0.191                           
REMARK   3   FREE R VALUE                     : 0.226                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 1161                            
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) : 1.70                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.74                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 1613                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2300                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 78                           
REMARK   3   BIN FREE R VALUE                    : 0.2710                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 931                                     
REMARK   3   NUCLEIC ACID ATOMS       : 574                                     
REMARK   3   HETEROGEN ATOMS          : 0                                       
REMARK   3   SOLVENT ATOMS            : 152                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 24.13                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 31.55                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 3.63000                                              
REMARK   3    B22 (A**2) : -1.23000                                             
REMARK   3    B33 (A**2) : -1.82000                                             
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 1.19000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): 0.110         
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.108         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.086         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 2.618         
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.964                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.947                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):  1598 ; 0.025 ; 0.021       
REMARK   3   BOND LENGTHS OTHERS               (A):  1173 ; 0.002 ; 0.020       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  2278 ; 2.582 ; 2.397       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):  2752 ; 1.202 ; 3.000       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):   105 ; 6.203 ; 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):   215 ; 0.138 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):  1329 ; 0.013 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):   241 ; 0.009 ; 0.020       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):   239 ; 0.223 ; 0.200       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):  1286 ; 0.250 ; 0.200       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION OTHERS         (A):   773 ; 0.092 ; 0.200       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):    95 ; 0.238 ; 0.200       
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):    19 ; 0.297 ; 0.200       
REMARK   3   SYMMETRY VDW OTHERS               (A):    95 ; 0.420 ; 0.200       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):    35 ; 0.247 ; 0.200       
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):   539 ; 1.471 ; 1.500       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):   882 ; 2.464 ; 2.000       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):  1059 ; 3.102 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  1396 ; 4.492 ; 4.500       
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: HYDROGENS HAVE BEEN ADDED IN THE RIDING   
REMARK   3  POSITIONS                                                           
REMARK   4                                                                      
REMARK   4 1RH6 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 01-DEC-03.                  
REMARK 100 THE DEPOSITION ID IS D_1000020742.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 07-MAR-02                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 6.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 3                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : NSLS                               
REMARK 200  BEAMLINE                       : X8C                                
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.10                               
REMARK 200  MONOCHROMATOR                  : NULL                               
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   : 32190                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.700                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 100.000                            
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 3.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 93.1                               
REMARK 200  DATA REDUNDANCY                : 93.10                              
REMARK 200  R MERGE                    (I) : 0.05000                            
REMARK 200  R SYM                      (I) : 0.05000                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 19.8000                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.70                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.78                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 95.8                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 95.80                              
REMARK 200  R MERGE FOR SHELL          (I) : 0.13500                            
REMARK 200  R SYM FOR SHELL            (I) : 0.15200                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 8.200                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MIR                          
REMARK 200 SOFTWARE USED: MLPHARE                                               
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 52.38                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.60                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: NAOAC, IMIDAZOLE, PH 6.5, VAPOR          
REMARK 280  DIFFUSION, HANGING DROP, TEMPERATURE 291K                           
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 1 2 1                          
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,Y,-Z                                                 
REMARK 290       3555   X+1/2,Y+1/2,Z                                           
REMARK 290       4555   -X+1/2,Y+1/2,-Z                                         
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   3  1.000000  0.000000  0.000000       40.10750            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       36.34550            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4 -1.000000  0.000000  0.000000       40.10750            
REMARK 290   SMTRY2   4  0.000000  1.000000  0.000000       36.34550            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1, 2                                                    
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: TRIMERIC                          
REMARK 350 APPLY THE FOLLOWING TO CHAINS: C, D, 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 350                                                                      
REMARK 350 BIOMOLECULE: 2                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A                                     
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 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      DC C     1                                                      
REMARK 465      DG D    30                                                      
REMARK 465     ASN B    53                                                      
REMARK 465     ARG B    54                                                      
REMARK 465     PRO B    55                                                      
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     PRO A  55    O                                                   
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT                     
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT.                            
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI           DISTANCE          
REMARK 500   OP1   DC D    19     O    HOH D    51              1.69            
REMARK 500   OP2   DA D    20     O    HOH D   122              1.84            
REMARK 500   NH2  ARG B    26     O    HOH B   100              2.02            
REMARK 500   O    HOH D    31     O    HOH D   117              2.16            
REMARK 500   O    HOH C    23     O    HOH B   115              2.17            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: CLOSE CONTACTS                                             
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC             
REMARK 500 SYMMETRY ARE IN CLOSE CONTACT.  AN ATOM LOCATED WITHIN 0.15          
REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A           
REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375             
REMARK 500 INSTEAD OF REMARK 500.  ATOMS WITH NON-BLANK ALTERNATE               
REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS.            
REMARK 500                                                                      
REMARK 500 DISTANCE CUTOFF:                                                     
REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS              
REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS                  
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI  SSYMOP   DISTANCE          
REMARK 500   NH2  ARG B    13     O    HOH C    36     4545     1.81            
REMARK 500   OE2  GLU A    27     O    HOH B   122     4556     1.96            
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS                                      
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3)               
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   RES CSSEQI ATM2   DEVIATION                     
REMARK 500     DT C   4   O3'    DG C   5   P      -0.075                       
REMARK 500     DG C   5   C8     DG C   5   N9      0.051                       
REMARK 500     DA C   7   O3'    DA C   7   C3'    -0.041                       
REMARK 500     DG C   8   C2     DG C   8   N3      0.059                       
REMARK 500     DG C  12   C6     DG C  12   O6      0.071                       
REMARK 500     DT C  14   C6     DT C  14   N1     -0.049                       
REMARK 500     DC D  16   O3'    DC D  16   C3'    -0.051                       
REMARK 500     DC D  19   P      DC D  19   O5'     0.076                       
REMARK 500     DG D  21   C6     DG D  21   N1     -0.044                       
REMARK 500     DA D  22   O3'    DA D  22   C3'    -0.056                       
REMARK 500     DA D  22   C4     DA D  22   C5     -0.051                       
REMARK 500     DT D  24   P      DT D  24   O5'     0.106                       
REMARK 500     DA D  25   P      DA D  25   O5'     0.067                       
REMARK 500     DA D  25   C5'    DA D  25   C4'     0.048                       
REMARK 500    VAL A  21   CB    VAL A  21   CG1     0.146                       
REMARK 500    GLU A  40   CD    GLU A  40   OE2     0.076                       
REMARK 500    ARG B  13   CG    ARG B  13   CD     -0.239                       
REMARK 500    GLU B  40   CD    GLU B  40   OE2     0.100                       
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500     DT C   2   N1  -  C1' -  C2' ANGL. DEV. =   8.9 DEGREES          
REMARK 500     DA C   3   N9  -  C4  -  C5  ANGL. DEV. =  -3.3 DEGREES          
REMARK 500     DA C   3   N1  -  C6  -  N6  ANGL. DEV. =   5.0 DEGREES          
REMARK 500     DA C   3   C5  -  C6  -  N6  ANGL. DEV. =  -6.2 DEGREES          
REMARK 500     DT C   4   O5' -  P   -  OP2 ANGL. DEV. =  -6.7 DEGREES          
REMARK 500     DT C   4   O4' -  C1' -  N1  ANGL. DEV. =   2.8 DEGREES          
REMARK 500     DG C   5   C5  -  C6  -  N1  ANGL. DEV. =   3.7 DEGREES          
REMARK 500     DG C   5   N1  -  C6  -  O6  ANGL. DEV. =  -4.1 DEGREES          
REMARK 500     DT C   6   O3' -  P   -  OP2 ANGL. DEV. =   6.9 DEGREES          
REMARK 500     DT C   6   O4' -  C1' -  N1  ANGL. DEV. =  -5.2 DEGREES          
REMARK 500     DA C   7   O4' -  C1' -  N9  ANGL. DEV. =   8.1 DEGREES          
REMARK 500     DA C   7   C6  -  N1  -  C2  ANGL. DEV. =   4.2 DEGREES          
REMARK 500     DG C   8   O4' -  C4' -  C3' ANGL. DEV. =  -4.5 DEGREES          
REMARK 500     DG C   8   C1' -  O4' -  C4' ANGL. DEV. =  -6.2 DEGREES          
REMARK 500     DG C   8   C4' -  C3' -  C2' ANGL. DEV. =  -5.0 DEGREES          
REMARK 500     DG C   8   C6  -  N1  -  C2  ANGL. DEV. =   4.5 DEGREES          
REMARK 500     DG C   8   N1  -  C2  -  N3  ANGL. DEV. =  -4.1 DEGREES          
REMARK 500     DG C   8   N3  -  C4  -  C5  ANGL. DEV. =   3.4 DEGREES          
REMARK 500     DG C   8   C4  -  C5  -  N7  ANGL. DEV. =   2.5 DEGREES          
REMARK 500     DG C   8   N3  -  C2  -  N2  ANGL. DEV. =   4.6 DEGREES          
REMARK 500     DG C   8   N1  -  C6  -  O6  ANGL. DEV. =   5.4 DEGREES          
REMARK 500     DG C   8   C5  -  C6  -  O6  ANGL. DEV. =  -4.7 DEGREES          
REMARK 500     DC C  10   C2  -  N3  -  C4  ANGL. DEV. =   3.9 DEGREES          
REMARK 500     DT C  11   N3  -  C4  -  O4  ANGL. DEV. =   3.8 DEGREES          
REMARK 500     DG C  12   OP1 -  P   -  OP2 ANGL. DEV. =  10.3 DEGREES          
REMARK 500     DG C  12   O5' -  P   -  OP2 ANGL. DEV. =  -9.4 DEGREES          
REMARK 500     DG C  12   O4' -  C1' -  N9  ANGL. DEV. =  -4.2 DEGREES          
REMARK 500     DG C  12   C2  -  N3  -  C4  ANGL. DEV. =   3.1 DEGREES          
REMARK 500     DG C  12   N1  -  C6  -  O6  ANGL. DEV. =  -4.3 DEGREES          
REMARK 500     DT C  13   O4' -  C1' -  C2' ANGL. DEV. =  -5.2 DEGREES          
REMARK 500     DT C  13   O4' -  C1' -  N1  ANGL. DEV. =  -4.3 DEGREES          
REMARK 500     DT C  13   C5  -  C4  -  O4  ANGL. DEV. =  -4.6 DEGREES          
REMARK 500     DT C  13   C4  -  C5  -  C7  ANGL. DEV. =   4.1 DEGREES          
REMARK 500     DT C  14   C6  -  N1  -  C2  ANGL. DEV. =  -3.1 DEGREES          
REMARK 500     DT C  14   N1  -  C2  -  N3  ANGL. DEV. =  -3.7 DEGREES          
REMARK 500     DT C  14   C2  -  N3  -  C4  ANGL. DEV. =   7.1 DEGREES          
REMARK 500     DT C  14   C4  -  C5  -  C6  ANGL. DEV. =  -4.1 DEGREES          
REMARK 500     DT C  14   C5  -  C6  -  N1  ANGL. DEV. =   6.2 DEGREES          
REMARK 500     DT C  14   N3  -  C2  -  O2  ANGL. DEV. =   4.9 DEGREES          
REMARK 500     DT C  14   N3  -  C4  -  O4  ANGL. DEV. =   9.5 DEGREES          
REMARK 500     DT C  14   C5  -  C4  -  O4  ANGL. DEV. =  -6.9 DEGREES          
REMARK 500     DG C  15   C6  -  N1  -  C2  ANGL. DEV. =  -3.7 DEGREES          
REMARK 500     DG C  15   N1  -  C2  -  N3  ANGL. DEV. =   7.1 DEGREES          
REMARK 500     DG C  15   C2  -  N3  -  C4  ANGL. DEV. =  -6.3 DEGREES          
REMARK 500     DG C  15   C5  -  N7  -  C8  ANGL. DEV. =  -3.1 DEGREES          
REMARK 500     DG C  15   N3  -  C4  -  N9  ANGL. DEV. =  -3.7 DEGREES          
REMARK 500     DG C  15   N3  -  C2  -  N2  ANGL. DEV. =  -7.1 DEGREES          
REMARK 500     DC D  16   O4' -  C1' -  N1  ANGL. DEV. =   1.9 DEGREES          
REMARK 500     DA D  17   O4' -  C1' -  N9  ANGL. DEV. =  -4.5 DEGREES          
REMARK 500     DA D  18   O4' -  C1' -  N9  ANGL. DEV. =   3.4 DEGREES          
REMARK 500                                                                      
REMARK 500 THIS ENTRY HAS      85 ANGLE DEVIATIONS.                             
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
DBREF  1RH6 A    1    55  UNP    P03699   VXIS_LAMBD       1     55             
DBREF  1RH6 B    1    55  UNP    P03699   VXIS_LAMBD       1     55             
DBREF  1RH6 C    1    15  PDB    1RH6     1RH6             1     15             
DBREF  1RH6 D   16    30  PDB    1RH6     1RH6            16     30             
SEQADV 1RH6 SER A   28  UNP  P03699    CYS    28 ENGINEERED MUTATION            
SEQADV 1RH6 SER B   28  UNP  P03699    CYS    28 ENGINEERED MUTATION            
SEQRES   1 C   15   DC  DT  DA  DT  DG  DT  DA  DG  DT  DC  DT  DG  DT          
SEQRES   2 C   15   DT  DG                                                      
SEQRES   1 D   15   DC  DA  DA  DC  DA  DG  DA  DC  DT  DA  DC  DA  DT          
SEQRES   2 D   15   DA  DG                                                      
SEQRES   1 A   55  MET TYR LEU THR LEU GLN GLU TRP ASN ALA ARG GLN ARG          
SEQRES   2 A   55  ARG PRO ARG SER LEU GLU THR VAL ARG ARG TRP VAL ARG          
SEQRES   3 A   55  GLU SER ARG ILE PHE PRO PRO PRO VAL LYS ASP GLY ARG          
SEQRES   4 A   55  GLU TYR LEU PHE HIS GLU SER ALA VAL LYS VAL ASP LEU          
SEQRES   5 A   55  ASN ARG PRO                                                  
SEQRES   1 B   55  MET TYR LEU THR LEU GLN GLU TRP ASN ALA ARG GLN ARG          
SEQRES   2 B   55  ARG PRO ARG SER LEU GLU THR VAL ARG ARG TRP VAL ARG          
SEQRES   3 B   55  GLU SER ARG ILE PHE PRO PRO PRO VAL LYS ASP GLY ARG          
SEQRES   4 B   55  GLU TYR LEU PHE HIS GLU SER ALA VAL LYS VAL ASP LEU          
SEQRES   5 B   55  ASN ARG PRO                                                  
FORMUL   5  HOH   *152(H2 O)                                                    
HELIX    1   1 THR A    4  ARG A   11  1                                   8    
HELIX    2   2 SER A   17  GLU A   27  1                                  11    
HELIX    3   3 LEU B    5  GLN B   12  1                                   8    
HELIX    4   4 SER B   17  GLU B   27  1                                  11    
SHEET    1   A 3 TYR A   2  LEU A   3  0                                        
SHEET    2   A 3 GLU A  40  HIS A  44 -1  O  PHE A  43   N  LEU A   3           
SHEET    3   A 3 VAL A  35  ASP A  37 -1  N  VAL A  35   O  LEU A  42           
SHEET    1   B 2 ILE A  30  PHE A  31  0                                        
SHEET    2   B 2 VAL A  48  LYS A  49 -1  O  VAL A  48   N  PHE A  31           
SHEET    1   C 3 TYR B   2  THR B   4  0                                        
SHEET    2   C 3 GLU B  40  HIS B  44 -1  O  PHE B  43   N  LEU B   3           
SHEET    3   C 3 VAL B  35  ASP B  37 -1  N  ASP B  37   O  GLU B  40           
SHEET    1   D 2 ILE B  30  PHE B  31  0                                        
SHEET    2   D 2 VAL B  48  LYS B  49 -1  O  VAL B  48   N  PHE B  31           
CISPEP   1 PHE A   31    PRO A   32          0        -7.30                     
CISPEP   2 PHE B   31    PRO B   32          0        -0.78                     
CRYST1   80.215   72.691   38.801  90.00 104.11  90.00 C 1 2 1       8          
ORIGX1      1.000000  0.000000  0.000000        0.00000                         
ORIGX2      0.000000  1.000000  0.000000        0.00000                         
ORIGX3      0.000000  0.000000  1.000000        0.00000                         
SCALE1      0.012466  0.000000  0.003134        0.00000                         
SCALE2      0.000000  0.013757  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.026575        0.00000