HEADER    COMPLEX (CAPSID PROTEIN/RNA HAIRPIN)    12-SEP-00   1E7X              
OBSLTE     07-NOV-05 1E7X      2C4Q                                             
TITLE     MS2-RNA HAIRPIN (2ONE-5) COMPLEX                                      
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: RNA;                                                       
COMPND   3 CHAIN: R, S;                                                         
COMPND   4 FRAGMENT: COATPROTEIN-BINDING;                                       
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MUTATION: YES;                                                       
COMPND   7 MOL_ID: 2;                                                           
COMPND   8 MOLECULE: MS2;                                                       
COMPND   9 CHAIN: A, B, C;                                                      
COMPND  10 FRAGMENT: CAPSID PROTEIN;                                            
COMPND  11 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 SYNTHETIC: YES;                                                      
SOURCE   3 MOL_ID: 2;                                                           
SOURCE   4 ORGANISM_SCIENTIFIC: BACTERIOPHAGE MS2;                              
SOURCE   5 EXPRESSION_SYSTEM: ESCHERICHIA COLI                                  
KEYWDS    COMPLEX (CAPSID PROTEIN/RNA HAIRPIN), HAIRPIN, CAPSID,                
KEYWDS   2 LEVIVIRUS                                                            
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    E.GRAHN,N.J.STONEHOUSE,P.G.STOCKLEY,L.LILJAS                          
REVDAT   4   07-NOV-05 1E7X    1       OBSLTE                                   
REVDAT   3   01-AUG-03 1E7X    1       ATOM                                     
REVDAT   2   17-JAN-02 1E7X    1       JRNL                                     
REVDAT   1   19-OCT-00 1E7X    0                                                
JRNL        AUTH   E.GRAHN,T.MOSS,C.HELGSTRAND,K.FRIDBORG,M.SUNDARAM,           
JRNL        AUTH 2 K.TARS,H.LAGO,N.STONEHOUSE,D.DAVIS,P.STOCKLEY,               
JRNL        AUTH 3 L.LILJAS                                                     
JRNL        TITL   STRUCTURAL BASIS OF PYRIMIDINE SPECIFICITY IN THE            
JRNL        TITL 2 MS2 RNA HAIRPIN-COAT-PROTEIN COMPLEX.                        
JRNL        REF    RNA                           V.   7  1616 2001              
JRNL        REFN   ASTM RNARFU  US ISSN 1355-8382                               
REMARK   1                                                                      
REMARK   2                                                                      
REMARK   2 RESOLUTION. 2.38 ANGSTROMS.                                          
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS 1.0                                              
REMARK   3   AUTHORS     : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-              
REMARK   3               : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES, PANNU,             
REMARK   3               : READ,RICE,SIMONSON,WARREN                            
REMARK   3                                                                      
REMARK   3  REFINEMENT TARGET : NULL                                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.38                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 29.75                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : NULL                           
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : NULL                           
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 61.9                           
REMARK   3   NUMBER OF REFLECTIONS             : 255841                         
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : THROUGHOUT                      
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE            (WORKING SET) : 0.190                           
REMARK   3   FREE R VALUE                     : 0.244                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 1.000                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 2539                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.004                           
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 20                           
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.38                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.42                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 7.10                         
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 1454                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3330                       
REMARK   3   BIN FREE R VALUE                    : 0.2200                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 0.80                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 12                           
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.063                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 2895                                    
REMARK   3   NUCLEIC ACID ATOMS       : 678                                     
REMARK   3   HETEROGEN ATOMS          : 38                                      
REMARK   3   SOLVENT ATOMS            : 179                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 37.70                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 42.40                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 0.00000                                              
REMARK   3    B22 (A**2) : 0.00000                                              
REMARK   3    B33 (A**2) : 0.00000                                              
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.32                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.38                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : 6.00                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : 0.30                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.35                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.007                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.40                            
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 23.80                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 2.04                            
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : RESTRAINED                                
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.    RMS    SIGMA                
REMARK   3   MAIN-CHAIN BOND              (A**2) : NULL  ; NULL                 
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : NULL  ; NULL                 
REMARK   3   SIDE-CHAIN BOND              (A**2) : NULL  ; NULL                 
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : FLAT MODEL                                           
REMARK   3   KSOL        : 0.26                                                 
REMARK   3   BSOL        : 28.26                                                
REMARK   3                                                                      
REMARK   3  NCS MODEL : CONSTR                                                  
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS.                         RMS   SIGMA/WEIGHT          
REMARK   3   GROUP  1  POSITIONAL            (A) : NULL  ; NULL                 
REMARK   3   GROUP  1  B-FACTOR           (A**2) : NULL  ; NULL                 
REMARK   3                                                                      
REMARK   3  PARAMETER FILE  1  : PROTEIN_REP.PARAM                              
REMARK   3  PARAMETER FILE  2  : DNA-RNA-ALL_MULT.PARAM                         
REMARK   3  PARAMETER FILE  3  : WATER_REP.PARAM                                
REMARK   3  PARAMETER FILE  4  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : PROTEIN.TOP                                    
REMARK   3  TOPOLOGY FILE  2   : DNA-RNA-ALL.TOP                                
REMARK   3  TOPOLOGY FILE  3   : WATER.TOP                                      
REMARK   3  TOPOLOGY FILE  4   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1E7X COMPLIES WITH FORMAT V. 2.3, 09-JULY-1998                       
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY EBI  ON 12-SEP-2000.                
REMARK 100 THE EBI ID CODE IS EBI-5292.                                         
REMARK 105                                                                      
REMARK 105 THE PROTEIN DATA BANK HAS ADOPTED THE SACCHARIDE CHEMISTS            
REMARK 105 NOMENCLATURE FOR ATOMS OF THE DEOXYRIBOSE/RIBOSE MOIETY              
REMARK 105 RATHER THAN THAT OF THE NUCLEOSIDE CHEMISTS.  THE RING               
REMARK 105 OXYGEN ATOM IS LABELLED O4* INSTEAD OF O1*.                          
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 16-JUN-1999                        
REMARK 200  TEMPERATURE           (KELVIN) : 287.0                              
REMARK 200  PH                             : 7.40                               
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : ESRF                               
REMARK 200  BEAMLINE                       : ID14-3                             
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.933                              
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                        
REMARK 200  DETECTOR MANUFACTURER          : MARCCD                             
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 374908                             
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.380                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 30.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : NULL                               
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 62.0                               
REMARK 200  DATA REDUNDANCY                : 4.200                              
REMARK 200  R MERGE                    (I) : 0.18100                            
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) : 2.38                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.48                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 10.0                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 1.10                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.20500                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: RAVE                                                  
REMARK 200 STARTING MODEL: MS2 RECOMBINANT CAPSIDS                              
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): NULL                                      
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): NULL                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: PH 7.4                                   
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: H 3 2                            
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -Y,X-Y,Z                                                
REMARK 290       3555   -X+Y,-X,Z                                               
REMARK 290       4555   Y,X,-Z                                                  
REMARK 290       5555   X-Y,-Y,-Z                                               
REMARK 290       6555   -X,-X+Y,-Z                                              
REMARK 290       7555   2/3+X,1/3+Y,1/3+Z                                       
REMARK 290       8555   2/3-Y,1/3+X-Y,1/3+Z                                     
REMARK 290       9555   2/3-X+Y,1/3-X,1/3+Z                                     
REMARK 290      10555   2/3+Y,1/3+X,1/3-Z                                       
REMARK 290      11555   2/3+X-Y,1/3-Y,1/3-Z                                     
REMARK 290      12555   2/3-X,1/3-X+Y,1/3-Z                                     
REMARK 290      13555   1/3+X,2/3+Y,2/3+Z                                       
REMARK 290      14555   1/3-Y,2/3+X-Y,2/3+Z                                     
REMARK 290      15555   1/3-X+Y,2/3-X,2/3+Z                                     
REMARK 290      16555   1/3+Y,2/3+X,2/3-Z                                       
REMARK 290      17555   1/3+X-Y,2/3-Y,2/3-Z                                     
REMARK 290      18555   1/3-X,2/3-X+Y,2/3-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 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   3 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   3 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   4  0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   5  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   5  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   5  0.000000  0.000000 -1.000000        0.00000            
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        0.00000            
REMARK 290   SMTRY1   7  1.000000  0.000000  0.000000      144.00000            
REMARK 290   SMTRY2   7  0.000000  1.000000  0.000000       83.13844            
REMARK 290   SMTRY3   7  0.000000  0.000000  1.000000      218.00000            
REMARK 290   SMTRY1   8 -0.500000 -0.866025  0.000000      144.00000            
REMARK 290   SMTRY2   8  0.866025 -0.500000  0.000000       83.13844            
REMARK 290   SMTRY3   8  0.000000  0.000000  1.000000      218.00000            
REMARK 290   SMTRY1   9 -0.500000  0.866025  0.000000      144.00000            
REMARK 290   SMTRY2   9 -0.866025 -0.500000  0.000000       83.13844            
REMARK 290   SMTRY3   9  0.000000  0.000000  1.000000      218.00000            
REMARK 290   SMTRY1  10 -0.500000  0.866025  0.000000      144.00000            
REMARK 290   SMTRY2  10  0.866025  0.500000  0.000000       83.13844            
REMARK 290   SMTRY3  10  0.000000  0.000000 -1.000000      218.00000            
REMARK 290   SMTRY1  11  1.000000  0.000000  0.000000      144.00000            
REMARK 290   SMTRY2  11  0.000000 -1.000000  0.000000       83.13844            
REMARK 290   SMTRY3  11  0.000000  0.000000 -1.000000      218.00000            
REMARK 290   SMTRY1  12 -0.500000 -0.866025  0.000000      144.00000            
REMARK 290   SMTRY2  12 -0.866025  0.500000  0.000000       83.13844            
REMARK 290   SMTRY3  12  0.000000  0.000000 -1.000000      218.00000            
REMARK 290   SMTRY1  13  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2  13  0.000000  1.000000  0.000000      166.27688            
REMARK 290   SMTRY3  13  0.000000  0.000000  1.000000      436.00000            
REMARK 290   SMTRY1  14 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  14  0.866025 -0.500000  0.000000      166.27688            
REMARK 290   SMTRY3  14  0.000000  0.000000  1.000000      436.00000            
REMARK 290   SMTRY1  15 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  15 -0.866025 -0.500000  0.000000      166.27688            
REMARK 290   SMTRY3  15  0.000000  0.000000  1.000000      436.00000            
REMARK 290   SMTRY1  16 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  16  0.866025  0.500000  0.000000      166.27688            
REMARK 290   SMTRY3  16  0.000000  0.000000 -1.000000      436.00000            
REMARK 290   SMTRY1  17  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2  17  0.000000 -1.000000  0.000000      166.27688            
REMARK 290   SMTRY3  17  0.000000  0.000000 -1.000000      436.00000            
REMARK 290   SMTRY1  18 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  18 -0.866025  0.500000  0.000000      166.27688            
REMARK 290   SMTRY3  18  0.000000  0.000000 -1.000000      436.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 THIS ENTRY CONTAINS THE CRYSTALLOGRAPHIC ASYMMETRIC UNIT             
REMARK 300 WHICH CONSISTS OF 5 CHAIN(S). SEE REMARK 350 FOR                     
REMARK 300 INFORMATION ON GENERATING THE BIOLOGICAL MOLECULE(S).                
REMARK 350                                                                      
REMARK 350 GENERATING THE BIOMOLECULE                                           
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 APPLY THE FOLLOWING TO CHAINS: R, S, A, B, C, I, X, Y, Z             
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 400                                                                      
REMARK 400 COMPOUND                                                             
REMARK 400  CHAIN R,S: CONTAIN MODIFIED RESIDUE AT POSITION 11                  
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       A R     1                                                      
REMARK 465       U R    19                                                      
REMARK 465       A S     1                                                      
REMARK 465       U S    19                                                      
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),F6.3)                  
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES: ENGH AND HUBER, 1991                                
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   RES CSSEQI ATM2   DEVIATION                     
REMARK 500    THR B  15   CB    THR B  15   CG2    0.047                        
REMARK 500    GLN B  54   CG    GLN B  54   CD     0.044                        
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: ENGH AND HUBER, 1991                                
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500    SER A   2   N   -  CA  -  C   ANGL. DEV. =-13.4 DEGREES           
REMARK 500    GLY A  14   N   -  CA  -  C   ANGL. DEV. =  9.8 DEGREES           
REMARK 500    SER A  37   N   -  CA  -  C   ANGL. DEV. =-10.6 DEGREES           
REMARK 500    TYR A  42   N   -  CA  -  C   ANGL. DEV. = -9.8 DEGREES           
REMARK 500    GLN A  54   N   -  CA  -  C   ANGL. DEV. =  8.7 DEGREES           
REMARK 500    LYS A  66   N   -  CA  -  C   ANGL. DEV. =-10.9 DEGREES           
REMARK 500    PRO A 119   C   -  N   -  CD  ANGL. DEV. =  8.8 DEGREES           
REMARK 500    SER B  37   N   -  CA  -  C   ANGL. DEV. =-11.3 DEGREES           
REMARK 500    TYR B  42   N   -  CA  -  C   ANGL. DEV. =-11.6 DEGREES           
REMARK 500    GLN B  50   N   -  CA  -  C   ANGL. DEV. = -9.1 DEGREES           
REMARK 500    ASN B  55   N   -  CA  -  C   ANGL. DEV. =  8.6 DEGREES           
REMARK 500    ARG B  56   N   -  CA  -  C   ANGL. DEV. =-11.2 DEGREES           
REMARK 500    LYS B  66   N   -  CA  -  C   ANGL. DEV. = -9.2 DEGREES           
REMARK 500    LEU B  77   CA  -  CB  -  CG  ANGL. DEV. =  9.1 DEGREES           
REMARK 500    GLY C  13   N   -  CA  -  C   ANGL. DEV. = -8.6 DEGREES           
REMARK 500    GLN C  50   N   -  CA  -  C   ANGL. DEV. = -8.8 DEGREES           
REMARK 500    ARG C  56   N   -  CA  -  C   ANGL. DEV. = -9.2 DEGREES           
REMARK 500    LYS C  66   N   -  CA  -  C   ANGL. DEV. = -9.4 DEGREES           
REMARK 600                                                                      
REMARK 600 HETEROGEN                                                            
REMARK 600 PYO: THE BASE OF 'PYO' IS PYRIMIDIN-2-ONE.                           
REMARK 650                                                                      
REMARK 650 HELIX                                                                
REMARK 650 DETERMINATION METHOD: AUTHOR-DETERMINED                              
REMARK 700                                                                      
REMARK 700 SHEET                                                                
REMARK 700 DETERMINATION METHOD: AUTHOR-DETERMINED                              
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1BMS   RELATED DB: PDB                                   
REMARK 900  MOL_ID: 1; MOLECULE: BACTERIOPHAGE MS2 CAPSID; CHAIN: A,            
REMARK 900  B, C; ENGINEERED: YES; MUTATION: P78N                               
REMARK 900 RELATED ID: 1DZS   RELATED DB: PDB                                   
REMARK 900  MS2-RNA HAIRPIN (4ONE -5) COMPLEX                                   
REMARK 900 RELATED ID: 1E6T   RELATED DB: PDB                                   
REMARK 900  MS2-RNA HAIRPIN (5BRU -5) COMPLEX                                   
REMARK 900 RELATED ID: 1MST   RELATED DB: PDB                                   
REMARK 900  MOL_ID: 1; MOLECULE: BACTERIOPHAGE MS2 CAPSID; CHAIN: A,            
REMARK 900  B, C; ENGINEERED: YES; MUTATION: E76D                               
REMARK 900 RELATED ID: 2MS2   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1MSC   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 6MSF   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1ZDH   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1ZDI   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1ZDJ   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1ZDK   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1AQ3   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1AQ4   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1MVA   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 1MVB   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 5MSF   RELATED DB: PDB                                   
REMARK 900 RELATED ID: 7MSF  RELATED DB: PDB                                    
DBREF  1E7X A    1   129  UNP    P03612   COAT_BPMS2       1    129             
DBREF  1E7X B    1   129  UNP    P03612   COAT_BPMS2       1    129             
DBREF  1E7X C    1   129  UNP    P03612   COAT_BPMS2       1    129             
DBREF  1E7X R    1    19  EMBL   V00642   LEMS2X        1746   1764             
DBREF  1E7X S    1    19  EMBL   V00642   LEMS2X        1746   1764             
SEQADV 1E7X PYO R   11  EMBL V00642         1756 ENGINEERED                     
SEQADV 1E7X PYO S   11  EMBL V00642         1756 ENGINEERED                     
SEQRES   1 R   19    A   C   A   U   G   A   G   G   A   U PYO   A   C          
SEQRES   2 R   19    C   C   A   U   G   U                                      
SEQRES   1 S   19    A   C   A   U   G   A   G   G   A   U PYO   A   C          
SEQRES   2 S   19    C   C   A   U   G   U                                      
SEQRES   1 A  129  ALA SER ASN PHE THR GLN PHE VAL LEU VAL ASP ASN GLY          
SEQRES   2 A  129  GLY THR GLY ASP VAL THR VAL ALA PRO SER ASN PHE ALA          
SEQRES   3 A  129  ASN GLY VAL ALA GLU TRP ILE SER SER ASN SER ARG SER          
SEQRES   4 A  129  GLN ALA TYR LYS VAL THR CYS SER VAL ARG GLN SER SER          
SEQRES   5 A  129  ALA GLN ASN ARG LYS TYR THR ILE LYS VAL GLU VAL PRO          
SEQRES   6 A  129  LYS VAL ALA THR GLN THR VAL GLY GLY VAL GLU LEU PRO          
SEQRES   7 A  129  VAL ALA ALA TRP ARG SER TYR LEU ASN MET GLU LEU THR          
SEQRES   8 A  129  ILE PRO ILE PHE ALA THR ASN SER ASP CYS GLU LEU ILE          
SEQRES   9 A  129  VAL LYS ALA MET GLN GLY LEU LEU LYS ASP GLY ASN PRO          
SEQRES  10 A  129  ILE PRO SER ALA ILE ALA ALA ASN SER GLY ILE TYR              
SEQRES   1 B  129  ALA SER ASN PHE THR GLN PHE VAL LEU VAL ASP ASN GLY          
SEQRES   2 B  129  GLY THR GLY ASP VAL THR VAL ALA PRO SER ASN PHE ALA          
SEQRES   3 B  129  ASN GLY VAL ALA GLU TRP ILE SER SER ASN SER ARG SER          
SEQRES   4 B  129  GLN ALA TYR LYS VAL THR CYS SER VAL ARG GLN SER SER          
SEQRES   5 B  129  ALA GLN ASN ARG LYS TYR THR ILE LYS VAL GLU VAL PRO          
SEQRES   6 B  129  LYS VAL ALA THR GLN THR VAL GLY GLY VAL GLU LEU PRO          
SEQRES   7 B  129  VAL ALA ALA TRP ARG SER TYR LEU ASN MET GLU LEU THR          
SEQRES   8 B  129  ILE PRO ILE PHE ALA THR ASN SER ASP CYS GLU LEU ILE          
SEQRES   9 B  129  VAL LYS ALA MET GLN GLY LEU LEU LYS ASP GLY ASN PRO          
SEQRES  10 B  129  ILE PRO SER ALA ILE ALA ALA ASN SER GLY ILE TYR              
SEQRES   1 C  129  ALA SER ASN PHE THR GLN PHE VAL LEU VAL ASP ASN GLY          
SEQRES   2 C  129  GLY THR GLY ASP VAL THR VAL ALA PRO SER ASN PHE ALA          
SEQRES   3 C  129  ASN GLY VAL ALA GLU TRP ILE SER SER ASN SER ARG SER          
SEQRES   4 C  129  GLN ALA TYR LYS VAL THR CYS SER VAL ARG GLN SER SER          
SEQRES   5 C  129  ALA GLN ASN ARG LYS TYR THR ILE LYS VAL GLU VAL PRO          
SEQRES   6 C  129  LYS VAL ALA THR GLN THR VAL GLY GLY VAL GLU LEU PRO          
SEQRES   7 C  129  VAL ALA ALA TRP ARG SER TYR LEU ASN MET GLU LEU THR          
SEQRES   8 C  129  ILE PRO ILE PHE ALA THR ASN SER ASP CYS GLU LEU ILE          
SEQRES   9 C  129  VAL LYS ALA MET GLN GLY LEU LEU LYS ASP GLY ASN PRO          
SEQRES  10 C  129  ILE PRO SER ALA ILE ALA ALA ASN SER GLY ILE TYR              
MODRES 1E7X PYO R   11    U                                                     
MODRES 1E7X PYO S   11    U                                                     
HET    PYO  R  11      19                                                       
HET    PYO  S  11      19                                                       
HETNAM     PYO 1-(BETA-D-RIBOFURANOSYL)-PYRIMIDIN-2-ONE-5'-PHOSPHATE            
FORMUL   1  PYO    2(C9 H13 N2 O8 P)                                            
FORMUL   6  HOH   *179(H2 O1)                                                   
HELIX    1   1 PHE A   25  VAL A   29  5                                   5    
HELIX    2   2 THR A   97  LEU A  112  1                                  16    
HELIX    3   3 ASN A  116  ALA A  124  1                                   9    
HELIX    4   4 PHE B   25  VAL B   29  5                                   5    
HELIX    5   5 PRO B   78  ALA B   81  5                                   4    
HELIX    6   6 THR B   97  LYS B  113  1                                  17    
HELIX    7   7 ASN B  116  ALA B  124  1                                   9    
HELIX    8   8 SER C   37  ALA C   41  5                                   5    
HELIX    9   9 THR C   97  LYS C  113  1                                  17    
HELIX   10  10 ASN C  116  ALA C  124  1                                   9    
SHEET    1   A 6 VAL A  75  PRO A  93  0                                        
SHEET    2   A 6 ASN A  55  VAL A  72 -1  N  VAL A  72   O  VAL A  75           
SHEET    3   A 6 LYS A  43  ARG A  49 -1  N  ARG A  49   O  LYS A  57           
SHEET    4   A 6 ALA A  30  SER A  34 -1  N  TRP A  32   O  VAL A  44           
SHEET    5   A 6 VAL A  18  ASN A  24 -1  N  ASN A  24   O  GLU A  31           
SHEET    6   A 6 PHE A   7  VAL A  10 -1  N  VAL A  10   O  VAL A  18           
SHEET    1   B 5 ARG B  83  PRO B  93  0                                        
SHEET    2   B 5 ASN B  55  PRO B  65 -1  N  VAL B  64   O  SER B  84           
SHEET    3   B 5 LYS B  43  ARG B  49 -1  N  ARG B  49   O  LYS B  57           
SHEET    4   B 5 ALA B  30  ILE B  33 -1  N  TRP B  32   O  VAL B  44           
SHEET    5   B 5 ALA B  21  ASN B  24 -1  N  ASN B  24   O  GLU B  31           
SHEET    1   C 2 PHE B   7  VAL B  10  0                                        
SHEET    2   C 2 VAL B  18  VAL B  20 -1  N  VAL B  20   O  PHE B   7           
SHEET    1   D 6 VAL C  75  PRO C  93  0                                        
SHEET    2   D 6 ASN C  55  VAL C  72 -1  N  VAL C  72   O  VAL C  75           
SHEET    3   D 6 LYS C  43  GLN C  50 -1  N  ARG C  49   O  LYS C  57           
SHEET    4   D 6 ALA C  30  SER C  34 -1  N  TRP C  32   O  VAL C  44           
SHEET    5   D 6 VAL C  18  ASN C  24 -1  N  ASN C  24   O  GLU C  31           
SHEET    6   D 6 PHE C   7  VAL C  10 -1  N  VAL C  10   O  VAL C  18           
LINK         O3*   U R  10                 P   PYO R  11                        
LINK         O3* PYO R  11                 P     A R  12                        
LINK         O3*   U S  10                 P   PYO S  11                        
LINK         O3* PYO S  11                 P     A S  12                        
CISPEP   1 LEU B   77    PRO B   78          0        -0.37                     
CRYST1  288.000  288.000  654.000  90.00  90.00 120.00 H 3 2       540          
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      0.003472  0.002005  0.000000        0.00000                         
SCALE2      0.000000  0.004009  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.001529        0.00000