HEADER    SIGNALING PROTEIN/RNA                   17-JAN-00   1DUL              
TITLE     STRUCTURE OF THE RIBONUCLEOPROTEIN CORE OF THE E. COLI SIGNAL         
TITLE    2 RECOGNITION PARTICLE                                                 
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: 4.5 S RNA DOMAIN IV;                                       
COMPND   3 CHAIN: B;                                                            
COMPND   4 FRAGMENT: 4.5S RNA FRAGMENT (RESIDUES 32-74);                        
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MUTATION: YES;                                                       
COMPND   7 MOL_ID: 2;                                                           
COMPND   8 MOLECULE: SIGNAL RECOGNITION PARTICLE PROTEIN;                       
COMPND   9 CHAIN: A;                                                            
COMPND  10 FRAGMENT: C-TERMINAL DOMAIN (RESIDUES 328-432);                      
COMPND  11 SYNONYM: FIFTY-FOUR HOMOLOG,FFH,P48;                                 
COMPND  12 ENGINEERED: YES;                                                     
COMPND  13 MUTATION: YES                                                        
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 SYNTHETIC: YES;                                                      
SOURCE   3 ORGANISM_SCIENTIFIC: SYNTHETIC CONSTRUCT;                            
SOURCE   4 ORGANISM_TAXID: 32630;                                               
SOURCE   5 MOL_ID: 2;                                                           
SOURCE   6 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI;                               
SOURCE   7 ORGANISM_TAXID: 562;                                                 
SOURCE   8 GENE: FFH;                                                           
SOURCE   9 EXPRESSION_SYSTEM: ESCHERICHIA COLI;                                 
SOURCE  10 EXPRESSION_SYSTEM_TAXID: 562                                         
KEYWDS    PROTEIN-RNA COMPLEX, DOUBLE HELIX, TETRALOOP, INTERNAL LOOP, SIGNAL   
KEYWDS   2 RECOGNITION PARTICLE, SRP, RIBONUCLEOPROTEIN, SIGNALING PROTEIN-RNA  
KEYWDS   3 COMPLEX                                                              
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    R.T.BATEY,R.P.RAMBO,L.LUCAST,B.RHA,J.A.DOUDNA                         
REVDAT   7   20-NOV-24 1DUL    1       REMARK                                   
REVDAT   6   14-OCT-20 1DUL    1       AUTHOR REMARK LINK                       
REVDAT   5   06-NOV-19 1DUL    1       COMPND SOURCE REMARK DBREF               
REVDAT   5 2                   1       SEQADV SEQRES HET    HETNAM              
REVDAT   5 3                   1       FORMUL HELIX  LINK   SITE                
REVDAT   5 4                   1       ATOM                                     
REVDAT   4   24-FEB-09 1DUL    1       VERSN                                    
REVDAT   3   12-AUG-03 1DUL    1       DBREF                                    
REVDAT   2   01-APR-03 1DUL    1       JRNL                                     
REVDAT   1   28-FEB-00 1DUL    0                                                
JRNL        AUTH   R.T.BATEY,R.P.RAMBO,L.LUCAST,B.RHA,J.A.DOUDNA                
JRNL        TITL   CRYSTAL STRUCTURE OF THE RIBONUCLEOPROTEIN CORE OF THE       
JRNL        TITL 2 SIGNAL RECOGNITION PARTICLE.                                 
JRNL        REF    SCIENCE                       V. 287  1232 2000              
JRNL        REFN                   ISSN 0036-8075                               
JRNL        PMID   10678824                                                     
JRNL        DOI    10.1126/SCIENCE.287.5456.1232                                
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.80 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : CNS                                                  
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) : 1.80                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 28.83                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : 1659132.060                    
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : 0.0000                         
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 89.7                           
REMARK   3   NUMBER OF REFLECTIONS             : 56313                          
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) : 0.199                           
REMARK   3   FREE R VALUE                     : 0.221                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 9.700                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 5473                            
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : 0.003                           
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 6                            
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 1.80                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 1.91                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : 66.90                        
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : 6396                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.2570                       
REMARK   3   BIN FREE R VALUE                    : 0.2670                       
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : 9.00                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : 635                          
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : 0.011                        
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 532                                     
REMARK   3   NUCLEIC ACID ATOMS       : 1054                                    
REMARK   3   HETEROGEN ATOMS          : 7                                       
REMARK   3   SOLVENT ATOMS            : 299                                     
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : 19.00                          
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 31.20                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 6.82000                                              
REMARK   3    B22 (A**2) : -1.21000                                             
REMARK   3    B33 (A**2) : -5.60000                                             
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.56000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : 0.21                            
REMARK   3   ESD FROM SIGMAA              (A) : 0.17                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : 5.00                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : 0.24                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : 0.17                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : 0.007                           
REMARK   3   BOND ANGLES            (DEGREES) : 1.000                           
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : 12.50                           
REMARK   3   IMPROPER ANGLES        (DEGREES) : 1.190                           
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) : 1.280 ; 1.500                
REMARK   3   MAIN-CHAIN ANGLE             (A**2) : 1.980 ; 2.000                
REMARK   3   SIDE-CHAIN BOND              (A**2) : 1.580 ; 2.000                
REMARK   3   SIDE-CHAIN ANGLE             (A**2) : 2.320 ; 2.500                
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED : FLAT MODEL                                           
REMARK   3   KSOL        : 0.37                                                 
REMARK   3   BSOL        : 51.18                                                
REMARK   3                                                                      
REMARK   3  NCS MODEL : NULL                                                    
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.PA                                 
REMARK   3  PARAMETER FILE  2  : DNA-RNA_REP.PA                                 
REMARK   3  PARAMETER FILE  3  : WATER_REP.PARA                                 
REMARK   3  PARAMETER FILE  4  : ION.PARAM                                      
REMARK   3  PARAMETER FILE  5  : CYCLIC2.PARAM                                  
REMARK   3  PARAMETER FILE  6  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : PROTEIN.TOP                                    
REMARK   3  TOPOLOGY FILE  2   : DNA-RNA.TOP                                    
REMARK   3  TOPOLOGY FILE  3   : WATER.TOP                                      
REMARK   3  TOPOLOGY FILE  4   : ION.TOP                                        
REMARK   3  TOPOLOGY FILE  5   : CYCLIC2.TOP                                    
REMARK   3  TOPOLOGY FILE  6   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1DUL COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 18-JAN-00.                  
REMARK 100 THE DEPOSITION ID IS D_1000010383.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 30-JUN-99                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : NULL                               
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : NSLS                               
REMARK 200  BEAMLINE                       : X4A                                
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.9793,0.9787,0.9667               
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : OTHER                              
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 56313                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.800                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 28.830                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 89.7                               
REMARK 200  DATA REDUNDANCY                : NULL                               
REMARK 200  R MERGE                    (I) : NULL                               
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : NULL                               
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : NULL                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : NULL                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : NULL                               
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  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL                         
REMARK 200 SOFTWARE USED: CNS                                                   
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 65.53                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.05                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: VAPOR DIFFUSION, HANGING DROP            
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       68.28350            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       39.14550            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4 -1.000000  0.000000  0.000000       68.28350            
REMARK 290   SMTRY2   4  0.000000  1.000000  0.000000       39.14550            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: DIMERIC                           
REMARK 350 APPLY THE FOLLOWING TO CHAINS: B, 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     GLY A     0                                                      
REMARK 465     LEU A     9A                                                     
REMARK 465     ARG A     9B                                                     
REMARK 465     GLN A     9C                                                     
REMARK 465     MSE A     9D                                                     
REMARK 465     LYS A     9E                                                     
REMARK 465     ASN A     9F                                                     
REMARK 465     MSE A     9G                                                     
REMARK 465     GLY A     9H                                                     
REMARK 465     GLY A     9I                                                     
REMARK 465     MSE A     9J                                                     
REMARK 465     ALA A     9K                                                     
REMARK 465     SER A     9L                                                     
REMARK 465     LEU A     9M                                                     
REMARK 465     MSE A     9N                                                     
REMARK 465     GLY A     9O                                                     
REMARK 465     LYS A     9P                                                     
REMARK 465     LEU A     9Q                                                     
REMARK 465     PRO A     9R                                                     
REMARK 465     GLY A     9S                                                     
REMARK 465     MSE A     9T                                                     
REMARK 465     GLY A     9U                                                     
REMARK 465     GLN A     9V                                                     
REMARK 465     ILE A     9W                                                     
REMARK 465     PRO A     9X                                                     
REMARK 465     ASP A     9Y                                                     
REMARK 465     ASN A     9Z                                                     
REMARK 465     VAL A    10A                                                     
REMARK 465     LYS A    10B                                                     
REMARK 465     SER A    10C                                                     
REMARK 465     GLN A    10D                                                     
REMARK 465     MSE A    10E                                                     
REMARK 465     ASP A    10F                                                     
REMARK 465     ASP A    10G                                                     
REMARK 465     LYS A    83                                                      
REMARK 465     LYS A    84                                                      
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     LYS A  23    CG   CD   CE   NZ                                   
REMARK 470     VAL A  24    CG1  CG2                                            
REMARK 470     LEU A  25    CG   CD1  CD2                                       
REMARK 470     VAL A  26    CG1  CG2                                            
REMARK 470     ARG A  27    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     ARG A  67    CG   CD   NE   CZ   NH1  NH2                        
REMARK 470     GLN A  76    CG   CD   OE1  NE2                                  
REMARK 470     LYS A  80    CG   CD   CE   NZ                                   
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    ASP A   2     -168.11   -127.18                                   
REMARK 500    LYS A  47     -163.44   -105.13                                   
REMARK 500    LYS A  81      -98.51    -83.24                                   
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: PLANAR GROUPS                                              
REMARK 500                                                                      
REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL                 
REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE                    
REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN                    
REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS                        
REMARK 500 AN RMSD GREATER THAN THIS VALUE                                      
REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                             
REMARK 500                                                                      
REMARK 500  M RES CSSEQI        RMS     TYPE                                    
REMARK 500      A B 156         0.06    SIDE CHAIN                              
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 620                                                                      
REMARK 620 METAL COORDINATION                                                   
REMARK 620 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER;               
REMARK 620 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE):                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                               K B 702   K                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   U B 135   O4                                                     
REMARK 620 2   G B 136   O6   79.0                                              
REMARK 620 3   U B 137   O4  131.5  72.2                                        
REMARK 620 4 HOH B 934   O   143.3  88.2  74.3                                  
REMARK 620 5 HOH B 957   O    80.0  99.1  67.5 136.4                            
REMARK 620 6 HOH B 991   O    59.5 137.1 144.3 117.9  85.0                      
REMARK 620 7 HOH B1024   O    78.9 102.7 144.6  70.5 146.0  61.2                
REMARK 620 8 HOH B1028   O   128.5 149.1  77.8  76.4  75.8  73.6  97.2          
REMARK 620 N                    1     2     3     4     5     6     7           
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG B 705  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   C B 141   OP1                                                    
REMARK 620 2 HOH B 805   O    85.2                                              
REMARK 620 3 HOH B 889   O   100.7  96.6                                        
REMARK 620 4 HOH B 963   O    90.6 174.3  80.4                                  
REMARK 620 5 HOH B 982   O   176.9  91.9  80.7  92.4                            
REMARK 620 6 HOH B 996   O    81.7  68.6 164.9 114.6  96.3                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                               K B 701   K                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   U B 146   O4                                                     
REMARK 620 2   C B 147   O2   82.6                                              
REMARK 620 3   C B 147   N3   61.3  45.9                                        
REMARK 620 4   A B 164   N7  158.1  81.0 114.7                                  
REMARK 620 5   G B 165   O6   73.8  83.7 113.2  90.0                            
REMARK 620 6 HOH B 900   O    66.5 149.1 113.5 128.6  87.1                      
REMARK 620 7 HOH B 929   O   107.1 128.4  93.8  94.4 147.8  65.4                
REMARK 620 8 HOH B 945   O   114.3 154.4 158.9  77.1  83.0  51.5  67.1          
REMARK 620 N                    1     2     3     4     5     6     7           
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                               K B 703   K                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   G B 149   O6                                                     
REMARK 620 2   G B 150   N2   80.5                                              
REMARK 620 3   G B 162   N3   80.7 109.5                                        
REMARK 620 4   G B 162   O2' 155.7 123.3  94.1                                  
REMARK 620 5 GLY A  57   O    73.6  64.7 154.2 110.1                            
REMARK 620 6 HOH A 114   O   134.7  54.5 107.4  69.6  89.7                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG B 706  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   G B 149   OP2                                                    
REMARK 620 2 HOH B 812   O    79.0                                              
REMARK 620 3 HOH B 842   O   172.4 101.7                                        
REMARK 620 4 HOH B 908   O    90.7 104.5  81.9                                  
REMARK 620 5 HOH B 948   O    99.3 159.7  82.7  95.7                            
REMARK 620 6 HOH B1005   O   104.4  85.3  83.1 163.4  75.5                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG B 704  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH B 814   O                                                      
REMARK 620 2 HOH B 896   O    85.0                                              
REMARK 620 3 HOH B 909   O    93.9  83.0                                        
REMARK 620 4 HOH B 920   O   177.2  92.5  84.8                                  
REMARK 620 5 HOH B 947   O    91.5 173.1  91.3  91.0                            
REMARK 620 6 HOH B1011   O    89.3  91.1 173.0  91.7  94.8                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG B 707  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH B 821   O                                                      
REMARK 620 2 HOH B 864   O   104.4                                              
REMARK 620 3 HOH B 875   O    82.5  87.9                                        
REMARK 620 4 HOH B1035   O    89.9 151.9  69.8                                  
REMARK 620 5 HOH B1046   O   159.2  86.6  80.3  73.3                            
REMARK 620 6 HOH B1047   O   105.1  96.0 170.1 103.5  90.9                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE K B 701                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE K B 702                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE K B 703                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG B 801                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG B 802                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG B 803                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC7                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG B 804                  
DBREF  1DUL B  130   178  PDB    1DUL     1DUL           130    178             
DBREF  1DUL A    0    84  UNP    P0AGD7   SRP54_ECOLI    328    432             
SEQADV 1DUL SER A   58  UNP  P0AGD7    CYS   406 ENGINEERED MUTATION            
SEQRES   1 B   49    G   G   C   U   C   U   G   U   U   U   A   C   C          
SEQRES   2 B   49    A   G   G   U   C   A   G   G   U   C   C   G   A          
SEQRES   3 B   49    A   A   G   G   A   A   G   C   A   G   C   C   A          
SEQRES   4 B   49    A   G   G   C   A   G   A   G   C CCC                      
SEQRES   1 A  105  GLY PHE ASP LEU ASN ASP PHE LEU GLU GLN LEU ARG GLN          
SEQRES   2 A  105  MSE LYS ASN MSE GLY GLY MSE ALA SER LEU MSE GLY LYS          
SEQRES   3 A  105  LEU PRO GLY MSE GLY GLN ILE PRO ASP ASN VAL LYS SER          
SEQRES   4 A  105  GLN MSE ASP ASP LYS VAL LEU VAL ARG MSE GLU ALA ILE          
SEQRES   5 A  105  ILE ASN SER MSE THR MSE LYS GLU ARG ALA LYS PRO GLU          
SEQRES   6 A  105  ILE ILE LYS GLY SER ARG LYS ARG ARG ILE ALA ALA GLY          
SEQRES   7 A  105  SER GLY MSE GLN VAL GLN ASP VAL ASN ARG LEU LEU LYS          
SEQRES   8 A  105  GLN PHE ASP ASP MSE GLN ARG MSE MSE LYS LYS MSE LYS          
SEQRES   9 A  105  LYS                                                          
MODRES 1DUL MSE A   28  MET  MODIFIED RESIDUE                                   
MODRES 1DUL MSE A   35  MET  MODIFIED RESIDUE                                   
MODRES 1DUL MSE A   37  MET  MODIFIED RESIDUE                                   
MODRES 1DUL MSE A   60  MET  MODIFIED RESIDUE                                   
MODRES 1DUL MSE A   75  MET  MODIFIED RESIDUE                                   
MODRES 1DUL MSE A   78  MET  MODIFIED RESIDUE                                   
MODRES 1DUL MSE A   79  MET  MODIFIED RESIDUE                                   
MODRES 1DUL MSE A   82  MET  MODIFIED RESIDUE                                   
HET    CCC  B 178      23                                                       
HET    MSE  A  28       8                                                       
HET    MSE  A  35       8                                                       
HET    MSE  A  37       8                                                       
HET    MSE  A  60       8                                                       
HET    MSE  A  75       8                                                       
HET    MSE  A  78       8                                                       
HET    MSE  A  79       8                                                       
HET    MSE  A  82       8                                                       
HET      K  B 701       1                                                       
HET      K  B 702       1                                                       
HET      K  B 703       1                                                       
HET     MG  B 704       1                                                       
HET     MG  B 705       1                                                       
HET     MG  B 706       1                                                       
HET     MG  B 707       1                                                       
HETNAM     CCC CYTIDINE-5'-PHOSPHATE-2',3'-CYCLIC PHOSPHATE                     
HETNAM     MSE SELENOMETHIONINE                                                 
HETNAM       K POTASSIUM ION                                                    
HETNAM      MG MAGNESIUM ION                                                    
FORMUL   1  CCC    C9 H13 N3 O10 P2                                             
FORMUL   2  MSE    8(C5 H11 N O2 SE)                                            
FORMUL   3    K    3(K 1+)                                                      
FORMUL   6   MG    4(MG 2+)                                                     
FORMUL  10  HOH   *299(H2 O)                                                    
HELIX    1   1 ASP A    2  GLN A    9  1                                   8    
HELIX    2   2 LYS A   23  SER A   34  1                                  12    
HELIX    3   3 THR A   36  LYS A   42  1                                   7    
HELIX    4   4 PRO A   43  ILE A   46  5                                   4    
HELIX    5   5 LYS A   47  SER A   58  1                                  12    
HELIX    6   6 GLN A   61  MSE A   82  1                                  22    
LINK         O3'   C B 177                 P   CCC B 178     1555   1555  1.61  
LINK         C   ARG A  27                 N   MSE A  28     1555   1555  1.33  
LINK         C   MSE A  28                 N   GLU A  29     1555   1555  1.33  
LINK         C   SER A  34                 N   MSE A  35     1555   1555  1.33  
LINK         C   MSE A  35                 N   THR A  36     1555   1555  1.33  
LINK         C   THR A  36                 N   MSE A  37     1555   1555  1.33  
LINK         C   MSE A  37                 N   LYS A  38     1555   1555  1.33  
LINK         C   GLY A  59                 N   MSE A  60     1555   1555  1.33  
LINK         C   MSE A  60                 N   GLN A  61     1555   1555  1.33  
LINK         C   ASP A  74                 N   MSE A  75     1555   1555  1.33  
LINK         C   MSE A  75                 N   GLN A  76     1555   1555  1.33  
LINK         C   ARG A  77                 N   MSE A  78     1555   1555  1.33  
LINK         C   MSE A  78                 N   MSE A  79     1555   1555  1.33  
LINK         C   MSE A  79                 N   LYS A  80     1555   1555  1.33  
LINK         C   LYS A  81                 N   MSE A  82     1555   1555  1.33  
LINK         O4    U B 135                 K     K B 702     1555   1555  2.95  
LINK         O6    G B 136                 K     K B 702     1555   1555  2.72  
LINK         O4    U B 137                 K     K B 702     1555   1555  3.22  
LINK         OP1   C B 141                MG    MG B 705     1555   1555  2.09  
LINK         O4    U B 146                 K     K B 701     1555   1555  3.21  
LINK         O2    C B 147                 K     K B 701     1555   1555  2.69  
LINK         N3    C B 147                 K     K B 701     1555   1555  3.04  
LINK         O6    G B 149                 K     K B 703     1555   1555  2.77  
LINK         OP2   G B 149                MG    MG B 706     1555   1555  1.90  
LINK         N2    G B 150                 K     K B 703     1555   1555  3.32  
LINK         N3    G B 162                 K     K B 703     1555   1555  3.03  
LINK         O2'   G B 162                 K     K B 703     1555   1555  2.75  
LINK         N7    A B 164                 K     K B 701     1555   1555  3.12  
LINK         O6    G B 165                 K     K B 701     1555   1555  2.68  
LINK         K     K B 701                 O   HOH B 900     1555   1555  3.51  
LINK         K     K B 701                 O   HOH B 929     1555   1555  2.57  
LINK         K     K B 701                 O   HOH B 945     1555   1555  2.75  
LINK         K     K B 702                 O   HOH B 934     1555   1555  2.65  
LINK         K     K B 702                 O   HOH B 957     1555   1555  2.74  
LINK         K     K B 702                 O   HOH B 991     1555   1555  3.06  
LINK         K     K B 702                 O   HOH B1024     1555   1555  2.70  
LINK         K     K B 702                 O   HOH B1028     1555   1555  2.79  
LINK         K     K B 703                 O   GLY A  57     1555   1555  3.01  
LINK         K     K B 703                 O   HOH A 114     1555   1555  3.43  
LINK        MG    MG B 704                 O   HOH B 814     1555   1555  2.11  
LINK        MG    MG B 704                 O   HOH B 896     1555   1555  2.04  
LINK        MG    MG B 704                 O   HOH B 909     1555   1555  2.14  
LINK        MG    MG B 704                 O   HOH B 920     1555   1555  2.00  
LINK        MG    MG B 704                 O   HOH B 947     1555   1555  1.98  
LINK        MG    MG B 704                 O   HOH B1011     1555   1555  2.12  
LINK        MG    MG B 705                 O   HOH B 805     1555   1555  2.03  
LINK        MG    MG B 705                 O   HOH B 889     1555   1555  2.16  
LINK        MG    MG B 705                 O   HOH B 963     1555   1555  1.94  
LINK        MG    MG B 705                 O   HOH B 982     1555   1555  2.26  
LINK        MG    MG B 705                 O   HOH B 996     1555   1555  2.54  
LINK        MG    MG B 706                 O   HOH B 812     1555   1555  2.17  
LINK        MG    MG B 706                 O   HOH B 842     1555   1555  2.13  
LINK        MG    MG B 706                 O   HOH B 908     1555   1555  2.18  
LINK        MG    MG B 706                 O   HOH B 948     1555   1555  2.26  
LINK        MG    MG B 706                 O   HOH B1005     1555   1555  2.12  
LINK        MG    MG B 707                 O   HOH B 821     1555   1555  1.92  
LINK        MG    MG B 707                 O   HOH B 864     1555   1555  2.08  
LINK        MG    MG B 707                 O   HOH B 875     1555   1555  2.62  
LINK        MG    MG B 707                 O   HOH B1035     1555   1555  2.81  
LINK        MG    MG B 707                 O   HOH B1046     1555   1555  2.14  
LINK        MG    MG B 707                 O   HOH B1047     1555   1555  2.13  
SITE     1 AC1  6   U B 146    C B 147    A B 164    G B 165                    
SITE     2 AC1  6 HOH B 945  HOH B 929                                          
SITE     1 AC2  8   U B 135    G B 136    U B 137  HOH B 957                    
SITE     2 AC2  8 HOH B 934  HOH B1028  HOH B 991  HOH B1024                    
SITE     1 AC3  5 GLY A  57    G B 149    G B 150    G B 162                    
SITE     2 AC3  5   C B 163                                                     
SITE     1 AC4  6 HOH B 920  HOH B 947  HOH B 896  HOH B 814                    
SITE     2 AC4  6 HOH B1011  HOH B 909                                          
SITE     1 AC5  6   C B 141  HOH B 963  HOH B 805  HOH B 889                    
SITE     2 AC5  6 HOH B 996  HOH B 982                                          
SITE     1 AC6  6   G B 149  HOH B 908  HOH B 842  HOH B1005                    
SITE     2 AC6  6 HOH B 812  HOH B 948                                          
SITE     1 AC7  6 HOH B 875  HOH B 864  HOH B 821  HOH B1047                    
SITE     2 AC7  6 HOH B1035  HOH B1046                                          
CRYST1  136.567   78.291   32.849  90.00  96.14  90.00 C 1 2 1       4          
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      0.007322  0.000000  0.000788        0.00000                         
SCALE2      0.000000  0.012773  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.030618        0.00000