HEADER    RNA                                     07-AUG-02   1MDG              
TITLE     AN ALTERNATING ANTIPARALLEL OCTAPLEX IN AN RNA CRYSTAL STRUCTURE      
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: 5'-R(*UP*(BGM)GP*AP*GP*GP*U)-3';                           
COMPND   3 CHAIN: A;                                                            
COMPND   4 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 SYNTHETIC: YES                                                       
KEYWDS    TETRAPLEX, BASE TETRADS, BASE OCTADS, RNA                             
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    B.C.PAN,Y.XIONG,K.SHI,M.SUNDARALINGAM                                 
REVDAT   4   14-FEB-24 1MDG    1       REMARK LINK                              
REVDAT   3   28-SEP-11 1MDG    1       HETATM                                   
REVDAT   2   24-FEB-09 1MDG    1       VERSN                                    
REVDAT   1   12-AUG-03 1MDG    0                                                
JRNL        AUTH   B.C.PAN,Y.XIONG,K.SHI,M.SUNDARALINGAM                        
JRNL        TITL   AN EIGHT-STRANDED HELICAL FRAGMENT IN RNA CRYSTAL STRUCTURE: 
JRNL        TITL 2 IMPLICATIONS FOR TETRAPLEX INTERACTION                       
JRNL        REF    STRUCTURE                     V.  11   825 2003              
JRNL        REFN                   ISSN 0969-2126                               
JRNL        PMID   12842045                                                     
JRNL        DOI    10.1016/S0969-2126(03)00108-4                                
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.50 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 : ENGH & HUBER                                    
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.50                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 30.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 2.000                          
REMARK   3   DATA CUTOFF HIGH         (ABS(F)) : NULL                           
REMARK   3   DATA CUTOFF LOW          (ABS(F)) : NULL                           
REMARK   3   COMPLETENESS (WORKING+TEST)   (%) : 98.5                           
REMARK   3   NUMBER OF REFLECTIONS             : 3763                           
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : NULL                            
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE            (WORKING SET) : 0.172                           
REMARK   3   FREE R VALUE                     : 0.194                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : NULL                            
REMARK   3   FREE R VALUE TEST SET COUNT      : 381                             
REMARK   3   ESTIMATED ERROR OF FREE R VALUE  : NULL                            
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : NULL                         
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : NULL                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : NULL                         
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   REFLECTIONS IN BIN    (WORKING SET) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : NULL                         
REMARK   3   BIN FREE R VALUE                    : NULL                         
REMARK   3   BIN FREE R VALUE TEST SET SIZE  (%) : NULL                         
REMARK   3   BIN FREE R VALUE TEST SET COUNT     : NULL                         
REMARK   3   ESTIMATED ERROR OF BIN FREE R VALUE : NULL                         
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 0                                       
REMARK   3   NUCLEIC ACID ATOMS       : 128                                     
REMARK   3   HETEROGEN ATOMS          : 12                                      
REMARK   3   SOLVENT ATOMS            : 16                                      
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : NULL                           
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : NULL                                                 
REMARK   3    B22 (A**2) : NULL                                                 
REMARK   3    B33 (A**2) : NULL                                                 
REMARK   3    B12 (A**2) : NULL                                                 
REMARK   3    B13 (A**2) : NULL                                                 
REMARK   3    B23 (A**2) : NULL                                                 
REMARK   3                                                                      
REMARK   3  ESTIMATED COORDINATE ERROR.                                         
REMARK   3   ESD FROM LUZZATI PLOT        (A) : NULL                            
REMARK   3   ESD FROM SIGMAA              (A) : NULL                            
REMARK   3   LOW RESOLUTION CUTOFF        (A) : NULL                            
REMARK   3                                                                      
REMARK   3  CROSS-VALIDATED ESTIMATED COORDINATE ERROR.                         
REMARK   3   ESD FROM C-V LUZZATI PLOT    (A) : NULL                            
REMARK   3   ESD FROM C-V SIGMAA          (A) : NULL                            
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES.                                   
REMARK   3   BOND LENGTHS                 (A) : NULL                            
REMARK   3   BOND ANGLES            (DEGREES) : NULL                            
REMARK   3   DIHEDRAL ANGLES        (DEGREES) : NULL                            
REMARK   3   IMPROPER ANGLES        (DEGREES) : NULL                            
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL MODEL : ISOTROPIC                                 
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 : NULL                                                 
REMARK   3   KSOL        : NULL                                                 
REMARK   3   BSOL        : NULL                                                 
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  : NULL                                           
REMARK   3  TOPOLOGY FILE  1   : NULL                                           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1MDG COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 12-AUG-02.                  
REMARK 100 THE DEPOSITION ID IS D_1000016835.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 31-MAY-01                          
REMARK 200  TEMPERATURE           (KELVIN) : 105                                
REMARK 200  PH                             : 6.6                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : APS                                
REMARK 200  BEAMLINE                       : 14-BM-D                            
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.9195, 0.9192, 0.800              
REMARK 200  MONOCHROMATOR                  : GRAPHITE                           
REMARK 200  OPTICS                         : MIRRORS                            
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : ENRAF-NONIUS                       
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 3800                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.500                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 30.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 2.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.8                               
REMARK 200  DATA REDUNDANCY                : 41.70                              
REMARK 200  R MERGE                    (I) : NULL                               
REMARK 200  R SYM                      (I) : 0.05600                            
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) : 1.50                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.55                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 98.6                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : NULL                               
REMARK 200  R SYM FOR SHELL            (I) : 0.30900                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: MAD                                            
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MAD                          
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   (%): 20.17                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.54                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: MPD, MGCL2, COBALT(III)HEXAMMINE,        
REMARK 280  ETHIDINE BROMIDE, SODIUM CACODYLATE, PH 6.6, VAPOR DIFFUSION,       
REMARK 280  HANGING DROP, TEMPERATURE 293K                                      
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: I 4 2 2                          
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   -Y,X,Z                                                  
REMARK 290       4555   Y,-X,Z                                                  
REMARK 290       5555   -X,Y,-Z                                                 
REMARK 290       6555   X,-Y,-Z                                                 
REMARK 290       7555   Y,X,-Z                                                  
REMARK 290       8555   -Y,-X,-Z                                                
REMARK 290       9555   X+1/2,Y+1/2,Z+1/2                                       
REMARK 290      10555   -X+1/2,-Y+1/2,Z+1/2                                     
REMARK 290      11555   -Y+1/2,X+1/2,Z+1/2                                      
REMARK 290      12555   Y+1/2,-X+1/2,Z+1/2                                      
REMARK 290      13555   -X+1/2,Y+1/2,-Z+1/2                                     
REMARK 290      14555   X+1/2,-Y+1/2,-Z+1/2                                     
REMARK 290      15555   Y+1/2,X+1/2,-Z+1/2                                      
REMARK 290      16555   -Y+1/2,-X+1/2,-Z+1/2                                    
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  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   3  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   4 -1.000000  0.000000  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  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   6  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   7  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   7  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   8  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY2   8 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY3   8  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   9  1.000000  0.000000  0.000000       17.97800            
REMARK 290   SMTRY2   9  0.000000  1.000000  0.000000       17.97800            
REMARK 290   SMTRY3   9  0.000000  0.000000  1.000000       19.02250            
REMARK 290   SMTRY1  10 -1.000000  0.000000  0.000000       17.97800            
REMARK 290   SMTRY2  10  0.000000 -1.000000  0.000000       17.97800            
REMARK 290   SMTRY3  10  0.000000  0.000000  1.000000       19.02250            
REMARK 290   SMTRY1  11  0.000000 -1.000000  0.000000       17.97800            
REMARK 290   SMTRY2  11  1.000000  0.000000  0.000000       17.97800            
REMARK 290   SMTRY3  11  0.000000  0.000000  1.000000       19.02250            
REMARK 290   SMTRY1  12  0.000000  1.000000  0.000000       17.97800            
REMARK 290   SMTRY2  12 -1.000000  0.000000  0.000000       17.97800            
REMARK 290   SMTRY3  12  0.000000  0.000000  1.000000       19.02250            
REMARK 290   SMTRY1  13 -1.000000  0.000000  0.000000       17.97800            
REMARK 290   SMTRY2  13  0.000000  1.000000  0.000000       17.97800            
REMARK 290   SMTRY3  13  0.000000  0.000000 -1.000000       19.02250            
REMARK 290   SMTRY1  14  1.000000  0.000000  0.000000       17.97800            
REMARK 290   SMTRY2  14  0.000000 -1.000000  0.000000       17.97800            
REMARK 290   SMTRY3  14  0.000000  0.000000 -1.000000       19.02250            
REMARK 290   SMTRY1  15  0.000000  1.000000  0.000000       17.97800            
REMARK 290   SMTRY2  15  1.000000  0.000000  0.000000       17.97800            
REMARK 290   SMTRY3  15  0.000000  0.000000 -1.000000       19.02250            
REMARK 290   SMTRY1  16  0.000000 -1.000000  0.000000       17.97800            
REMARK 290   SMTRY2  16 -1.000000  0.000000  0.000000       17.97800            
REMARK 290   SMTRY3  16  0.000000  0.000000 -1.000000       19.02250            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 300 REMARK: THE THREE STRANDS OF THE TETRAPLEX IS GENERATED BY THE FOUR  
REMARK 300 FOLD AXIS                                                            
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: TETRAMERIC                        
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 350   BIOMT1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 350   BIOMT1   3  0.000000 -1.000000  0.000000        0.00000            
REMARK 350   BIOMT2   3  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 350   BIOMT1   4  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT2   4 -1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT3   4  0.000000  0.000000  1.000000        0.00000            
REMARK 375                                                                      
REMARK 375 SPECIAL POSITION                                                     
REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS            
REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL          
REMARK 375 POSITIONS.                                                           
REMARK 375                                                                      
REMARK 375 ATOM RES CSSEQI                                                      
REMARK 375 NA    NA A 101  LIES ON A SPECIAL POSITION.                          
REMARK 375 NA    NA A 102  LIES ON A SPECIAL POSITION.                          
REMARK 375 NA    NA A 103  LIES ON A SPECIAL POSITION.                          
REMARK 375 NA    NA A 104  LIES ON A SPECIAL POSITION.                          
REMARK 375 NA    NA A 105  LIES ON A SPECIAL POSITION.                          
REMARK 375 CO   NCO A 201  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A 305  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A 315  LIES ON A SPECIAL POSITION.                          
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      U A   6   C2' -  C3' -  O3' ANGL. DEV. =  29.1 DEGREES          
REMARK 500      U A   6   O4' -  C1' -  C2' ANGL. DEV. = -10.4 DEGREES          
REMARK 500      U A   6   N1  -  C1' -  C2' ANGL. DEV. = -31.9 DEGREES          
REMARK 500      U A   6   C1' -  C2' -  O2' ANGL. DEV. =  22.7 DEGREES          
REMARK 500      U A   6   C3' -  C2' -  O2' ANGL. DEV. = -30.9 DEGREES          
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      G A   4         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                              NA A 104  NA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   G A   4   O6                                                     
REMARK 620 2   G A   5   O6   71.8                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              NA A 105  NA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   G A   5   O6                                                     
REMARK 620 2   U A   6   O4   69.7                                              
REMARK 620 N                    1                                               
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA A 101                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA A 102                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA A 103                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA A 104                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA A 105                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NCO A 201                 
DBREF  1MDG A    1     6  PDB    1MDG     1MDG             1      6             
SEQRES   1 A    6    U BGM   A   G   G   U                                      
MODRES 1MDG BGM A    2   DG                                                     
HET    BGM  A   2      23                                                       
HET     NA  A 101       1                                                       
HET     NA  A 102       1                                                       
HET     NA  A 103       1                                                       
HET     NA  A 104       1                                                       
HET     NA  A 105       1                                                       
HET    NCO  A 201       7                                                       
HETNAM     BGM 8-BROMO-2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE                       
HETNAM      NA SODIUM ION                                                       
HETNAM     NCO COBALT HEXAMMINE(III)                                            
FORMUL   1  BGM    C10 H13 BR N5 O7 P                                           
FORMUL   2   NA    5(NA 1+)                                                     
FORMUL   7  NCO    CO H18 N6 3+                                                 
FORMUL   8  HOH   *16(H2 O)                                                     
LINK         O3'   U A   1                 P   BGM A   2     1555   1555  1.59  
LINK         O3' BGM A   2                 P     A A   3     1555   1555  1.63  
LINK         O6  BGM A   2                NA    NA A 101     1555   1555  2.87  
LINK         O6  BGM A   2                NA    NA A 102     1555   1555  2.82  
LINK         O6    G A   4                NA    NA A 103     1555   1555  3.00  
LINK         O6    G A   4                NA    NA A 104     1555   1555  2.75  
LINK         O6    G A   5                NA    NA A 104     1555   1555  2.75  
LINK         O6    G A   5                NA    NA A 105     1555   1555  2.83  
LINK         O4    U A   6                NA    NA A 105     1555   1555  2.70  
SITE     1 AC1  2 BGM A   2   NA A 102                                          
SITE     1 AC2  4 BGM A   2    A A   3   NA A 101   NA A 103                    
SITE     1 AC3  4   A A   3    G A   4   NA A 102   NA A 104                    
SITE     1 AC4  4   G A   4    G A   5   NA A 103   NA A 105                    
SITE     1 AC5  3   G A   5    U A   6   NA A 104                               
SITE     1 AC6  6 BGM A   2    A A   3    G A   5    U A   6                    
SITE     2 AC6  6 HOH A 308  HOH A 314                                          
CRYST1   35.956   35.956   38.045  90.00  90.00  90.00 I 4 2 2      16          
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      0.027812  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.027812  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.026285        0.00000                         
ATOM      1  O5'   U A   1     -13.803   2.639  24.658  1.00 27.14           O  
ATOM      2  C5'   U A   1     -13.007   3.811  24.477  1.00 23.39           C  
ATOM      3  C4'   U A   1     -11.860   3.465  23.558  1.00 19.89           C  
ATOM      4  O4'   U A   1     -11.136   2.347  24.049  1.00 18.63           O  
ATOM      5  C3'   U A   1     -12.222   3.170  22.103  1.00 19.80           C  
ATOM      6  O3'   U A   1     -11.455   4.177  21.446  1.00 18.56           O  
ATOM      7  C2'   U A   1     -11.564   1.819  21.792  1.00 20.15           C  
ATOM      8  O2'   U A   1     -10.924   1.647  20.547  1.00 23.56           O  
ATOM      9  C1'   U A   1     -10.597   1.641  22.964  1.00 19.03           C  
ATOM     10  N1    U A   1     -10.339   0.271  23.391  1.00 16.96           N  
ATOM     11  C2    U A   1      -9.007  -0.143  23.445  1.00 15.52           C  
ATOM     12  O2    U A   1      -8.065   0.602  23.187  1.00 13.87           O  
ATOM     13  N3    U A   1      -8.826  -1.446  23.820  1.00 13.87           N  
ATOM     14  C4    U A   1      -9.809  -2.357  24.169  1.00 14.59           C  
ATOM     15  O4    U A   1      -9.484  -3.465  24.564  1.00 14.68           O  
ATOM     16  C5    U A   1     -11.146  -1.857  24.091  1.00 16.18           C  
ATOM     17  C6    U A   1     -11.361  -0.587  23.734  1.00 16.65           C  
HETATM   18  P   BGM A   2     -11.990   4.917  20.142  1.00 16.06           P  
HETATM   19  OP1 BGM A   2     -12.839   6.056  20.601  1.00 19.02           O  
HETATM   20  OP2 BGM A   2     -12.531   3.927  19.182  1.00 19.84           O  
HETATM   21  O5' BGM A   2     -10.662   5.571  19.596  1.00 13.78           O  
HETATM   22  C5' BGM A   2      -9.590   4.725  19.191  1.00 12.14           C  
HETATM   23  C4' BGM A   2      -8.471   5.567  18.629  1.00 10.79           C  
HETATM   24  O4' BGM A   2      -7.252   4.823  18.694  1.00 12.76           O  
HETATM   25  C1' BGM A   2      -6.544   4.883  17.479  1.00 10.90           C  
HETATM   26  N9  BGM A   2      -5.706   3.690  17.391  1.00  9.93           N  
HETATM   27  C8  BGM A   2      -6.079   2.363  17.415  1.00  9.73           C  
HETATM   28  N7  BGM A   2      -5.063   1.548  17.368  1.00 10.90           N  
HETATM   29  C5  BGM A   2      -3.955   2.375  17.307  1.00  9.36           C  
HETATM   30  C4  BGM A   2      -4.325   3.698  17.318  1.00  8.77           C  
HETATM   31  N3  BGM A   2      -3.546   4.790  17.321  1.00 10.08           N  
HETATM   32  C2  BGM A   2      -2.272   4.495  17.294  1.00  9.28           C  
HETATM   33  N2  BGM A   2      -1.386   5.490  17.245  1.00  9.61           N  
HETATM   34  N1  BGM A   2      -1.781   3.212  17.286  1.00  9.79           N  
HETATM   35  C6  BGM A   2      -2.584   2.054  17.292  1.00 10.15           C  
HETATM   36  O6  BGM A   2      -2.079   0.942  17.286  1.00 10.04           O  
HETATM   37  C2' BGM A   2      -7.643   5.042  16.457  1.00 10.32           C  
HETATM   38  C3' BGM A   2      -8.590   5.997  17.168  1.00  9.64           C  
HETATM   39  O3' BGM A   2      -8.150   7.358  17.070  1.00 11.42           O  
HETATM   40 BR   BGM A   2      -7.838   1.766  17.673  1.00  4.99          BR  
ATOM     41  P     A A   3      -8.373   8.194  15.685  1.00 12.90           P  
ATOM     42  OP1   A A   3      -8.386   9.640  16.013  1.00 15.91           O  
ATOM     43  OP2   A A   3      -9.501   7.568  14.958  1.00 13.39           O  
ATOM     44  O5'   A A   3      -7.035   7.914  14.848  1.00 13.04           O  
ATOM     45  C5'   A A   3      -5.730   8.391  15.242  1.00 12.88           C  
ATOM     46  C4'   A A   3      -4.710   7.770  14.307  1.00 12.95           C  
ATOM     47  O4'   A A   3      -4.585   6.362  14.576  1.00 12.14           O  
ATOM     48  C3'   A A   3      -5.188   7.901  12.853  1.00 11.96           C  
ATOM     49  O3'   A A   3      -4.040   8.318  12.105  1.00 12.93           O  
ATOM     50  C2'   A A   3      -5.592   6.492  12.457  1.00 10.33           C  
ATOM     51  O2'   A A   3      -5.535   6.104  11.093  1.00 13.94           O  
ATOM     52  C1'   A A   3      -4.661   5.672  13.339  1.00 11.59           C  
ATOM     53  N9    A A   3      -5.092   4.313  13.573  1.00  9.12           N  
ATOM     54  C8    A A   3      -6.341   3.792  13.648  1.00  9.33           C  
ATOM     55  N7    A A   3      -6.353   2.517  13.874  1.00  9.91           N  
ATOM     56  C5    A A   3      -5.015   2.171  13.917  1.00  9.78           C  
ATOM     57  C6    A A   3      -4.382   0.946  14.044  1.00 12.03           C  
ATOM     58  N6    A A   3      -5.049  -0.209  14.192  1.00 11.88           N  
ATOM     59  N1    A A   3      -3.031   0.935  14.023  1.00 10.48           N  
ATOM     60  C2    A A   3      -2.378   2.113  13.875  1.00  8.22           C  
ATOM     61  N3    A A   3      -2.879   3.320  13.753  1.00 11.14           N  
ATOM     62  C4    A A   3      -4.223   3.273  13.769  1.00 10.21           C  
ATOM     63  P     G A   4      -4.199   9.169  10.755  1.00 14.09           P  
ATOM     64  OP1   G A   4      -4.870  10.471  11.057  1.00 15.20           O  
ATOM     65  OP2   G A   4      -4.790   8.276   9.721  1.00 14.17           O  
ATOM     66  O5'   G A   4      -2.695   9.420  10.288  1.00 12.57           O  
ATOM     67  C5'   G A   4      -1.901  10.461  10.848  1.00 12.73           C  
ATOM     68  C4'   G A   4      -0.434  10.097  10.777  1.00 11.24           C  
ATOM     69  O4'   G A   4      -0.142   8.974  11.652  1.00 13.50           O  
ATOM     70  C3'   G A   4       0.028   9.616   9.418  1.00 12.41           C  
ATOM     71  O3'   G A   4       0.229  10.730   8.577  1.00 12.76           O  
ATOM     72  C2'   G A   4       1.296   8.854   9.777  1.00 10.27           C  
ATOM     73  O2'   G A   4       2.388   9.710  10.102  1.00 12.31           O  
ATOM     74  C1'   G A   4       0.835   8.132  11.053  1.00  9.93           C  
ATOM     75  N9    G A   4       0.227   6.825  10.840  1.00  9.26           N  
ATOM     76  C8    G A   4      -1.112   6.508  10.824  1.00 11.42           C  
ATOM     77  N7    G A   4      -1.327   5.225  10.726  1.00 10.86           N  
ATOM     78  C5    G A   4      -0.058   4.671  10.640  1.00 10.25           C  
ATOM     79  C6    G A   4       0.342   3.320  10.590  1.00 10.31           C  
ATOM     80  O6    G A   4      -0.379   2.315  10.605  1.00  9.85           O  
ATOM     81  N1    G A   4       1.729   3.194  10.531  1.00 11.27           N  
ATOM     82  C2    G A   4       2.618   4.257  10.505  1.00  8.01           C  
ATOM     83  N2    G A   4       3.928   3.912  10.401  1.00 10.53           N  
ATOM     84  N3    G A   4       2.252   5.520  10.568  1.00 11.05           N  
ATOM     85  C4    G A   4       0.907   5.652  10.662  1.00  8.38           C  
ATOM     86  P     G A   5      -0.032  10.580   6.994  1.00 14.17           P  
ATOM     87  OP1   G A   5       0.110  11.998   6.602  1.00 16.98           O  
ATOM     88  OP2   G A   5      -1.274   9.842   6.735  1.00 16.51           O  
ATOM     89  O5'   G A   5       1.180   9.730   6.491  1.00 12.32           O  
ATOM     90  C5'   G A   5       2.458  10.327   6.408  1.00 14.68           C  
ATOM     91  C4'   G A   5       3.479   9.289   6.067  1.00 13.26           C  
ATOM     92  O4'   G A   5       3.531   8.310   7.145  1.00 12.54           O  
ATOM     93  C3'   G A   5       3.174   8.416   4.859  1.00 15.65           C  
ATOM     94  O3'   G A   5       3.481   9.131   3.691  1.00 15.73           O  
ATOM     95  C2'   G A   5       4.105   7.239   5.104  1.00 12.32           C  
ATOM     96  O2'   G A   5       5.467   7.565   4.830  1.00 12.92           O  
ATOM     97  C1'   G A   5       3.908   7.045   6.613  1.00 11.63           C  
ATOM     98  N9    G A   5       2.836   6.081   6.892  1.00 11.06           N  
ATOM     99  C8    G A   5       1.479   6.321   7.007  1.00 10.71           C  
ATOM    100  N7    G A   5       0.777   5.222   7.180  1.00  9.09           N  
ATOM    101  C5    G A   5       1.731   4.212   7.197  1.00  9.83           C  
ATOM    102  C6    G A   5       1.597   2.804   7.363  1.00 10.18           C  
ATOM    103  O6    G A   5       0.570   2.130   7.527  1.00 10.81           O  
ATOM    104  N1    G A   5       2.838   2.164   7.331  1.00 10.61           N  
ATOM    105  C2    G A   5       4.038   2.795   7.162  1.00 10.96           C  
ATOM    106  N2    G A   5       5.121   2.023   7.145  1.00 13.01           N  
ATOM    107  N3    G A   5       4.182   4.097   7.011  1.00 10.81           N  
ATOM    108  C4    G A   5       3.005   4.738   7.033  1.00  9.37           C  
ATOM    109  P     U A   6       2.766   8.721   2.312  1.00 18.59           P  
ATOM    110  OP1   U A   6       3.136   7.289   2.040  1.00 19.98           O  
ATOM    111  OP2   U A   6       3.164   9.813   1.347  1.00 20.74           O  
ATOM    112  O5'   U A   6       1.219   8.711   2.681  1.00 19.22           O  
ATOM    113  C5'   U A   6       0.233   9.483   2.037  1.00 19.32           C  
ATOM    114  C4'   U A   6      -1.106   8.875   2.343  1.00 21.40           C  
ATOM    115  O4'   U A   6      -1.029   7.479   1.935  1.00 20.02           O  
ATOM    116  C3'   U A   6      -1.416   8.777   3.835  1.00 21.77           C  
ATOM    117  O3'   U A   6      -2.073   9.954   4.321  1.00 25.29           O  
ATOM    118  C2'   U A   6      -1.248   7.283   4.098  1.00 23.48           C  
ATOM    119  O2'   U A   6      -1.826   7.630   5.352  1.00 28.13           O  
ATOM    120  C1'   U A   6      -1.816   6.685   2.811  1.00 18.43           C  
ATOM    121  N1    U A   6      -1.026   5.537   3.298  1.00 16.07           N  
ATOM    122  C2    U A   6      -1.755   4.409   3.668  1.00 14.21           C  
ATOM    123  O2    U A   6      -2.962   4.382   3.653  1.00 14.60           O  
ATOM    124  N3    U A   6      -1.006   3.318   4.040  1.00 12.18           N  
ATOM    125  C4    U A   6       0.365   3.239   4.110  1.00 14.43           C  
ATOM    126  O4    U A   6       0.877   2.156   4.379  1.00 12.82           O  
ATOM    127  C5    U A   6       1.069   4.446   3.734  1.00 13.69           C  
ATOM    128  C6    U A   6       0.362   5.535   3.351  1.00 15.24           C  
TER     129        U A   6                                                      
HETATM  130 NA    NA A 101       0.001   0.000  19.017  0.25 15.69          NA  
HETATM  131 NA    NA A 102      -0.013  -0.001  15.610  0.25 17.84          NA  
HETATM  132 NA    NA A 103       0.018   0.005  12.469  0.25 21.01          NA  
HETATM  133 NA    NA A 104       0.004  -0.001   9.168  0.25  8.23          NA  
HETATM  134 NA    NA A 105      -0.004   0.001   5.753  0.25  8.46          NA  
HETATM  135 CO   NCO A 201     -10.723  10.726  19.019  0.25 20.28          CO  
HETATM  136  N1  NCO A 201     -10.311  11.179  21.083  0.50 18.90           N  
HETATM  137  N2  NCO A 201     -11.179  10.293  16.958  0.50 18.95           N  
HETATM  138  N3  NCO A 201     -10.661  12.810  18.528  0.50 21.20           N  
HETATM  139  N4  NCO A 201     -12.810  10.659  19.517  0.50 21.20           N  
HETATM  140  N5  NCO A 201     -10.420   8.590  19.177  0.50 20.87           N  
HETATM  141  N6  NCO A 201      -8.581  10.417  18.877  0.50 20.89           N  
HETATM  142  O   HOH A 301      -7.645   4.226  10.213  1.00 20.11           O  
HETATM  143  O   HOH A 302      -3.100   7.913   7.414  1.00 20.16           O  
HETATM  144  O   HOH A 303      -8.954   6.023  12.727  1.00 25.80           O  
HETATM  145  O   HOH A 304      -8.271   8.350   8.034  1.00 32.76           O  
HETATM  146  O   HOH A 305      -5.207  12.773   9.515  0.25 29.23           O  
HETATM  147  O   HOH A 306     -11.723   7.739  23.225  1.00 33.44           O  
HETATM  148  O   HOH A 307     -13.454   9.372  24.035  1.00 25.12           O  
HETATM  149  O   HOH A 308     -13.210  12.780  16.839  1.00 24.99           O  
HETATM  150  O   HOH A 309     -10.810   1.127  17.967  1.00 27.12           O  
HETATM  151  O   HOH A 310      -8.988   6.300   8.532  1.00 27.66           O  
HETATM  152  O   HOH A 312       1.767  13.748   7.726  1.00 30.24           O  
HETATM  153  O   HOH A 313      -5.502   6.618   5.790  1.00 38.69           O  
HETATM  154  O   HOH A 314       5.983  10.149   2.526  1.00 42.83           O  
HETATM  155  O   HOH A 315       1.493  16.489   9.503  0.25 41.84           O  
HETATM  156  O   HOH A 316     -11.800   3.386  16.692  1.00 35.75           O  
HETATM  157  O   HOH A 411       2.672  12.387  10.252  1.00 30.07           O  
CONECT    6   18                                                                
CONECT   18    6   19   20   21                                                 
CONECT   19   18                                                                
CONECT   20   18                                                                
CONECT   21   18   22                                                           
CONECT   22   21   23                                                           
CONECT   23   22   24   38                                                      
CONECT   24   23   25                                                           
CONECT   25   24   26   37                                                      
CONECT   26   25   27   30                                                      
CONECT   27   26   28   40                                                      
CONECT   28   27   29                                                           
CONECT   29   28   30   35                                                      
CONECT   30   26   29   31                                                      
CONECT   31   30   32                                                           
CONECT   32   31   33   34                                                      
CONECT   33   32                                                                
CONECT   34   32   35                                                           
CONECT   35   29   34   36                                                      
CONECT   36   35  130  131                                                      
CONECT   37   25   38                                                           
CONECT   38   23   37   39                                                      
CONECT   39   38   41                                                           
CONECT   40   27                                                                
CONECT   41   39                                                                
CONECT   80  132  133                                                           
CONECT  103  133  134                                                           
CONECT  126  134                                                                
CONECT  130   36                                                                
CONECT  131   36                                                                
CONECT  132   80                                                                
CONECT  133   80  103                                                           
CONECT  134  103  126                                                           
CONECT  135  136  137  138  139                                                 
CONECT  135  140  141                                                           
CONECT  136  135                                                                
CONECT  137  135                                                                
CONECT  138  135                                                                
CONECT  139  135                                                                
CONECT  140  135                                                                
CONECT  141  135                                                                
MASTER      365    0    7    0    0    0    7    6  156    1   41    1          
END