HEADER    RNA                                     29-JAN-03   1NTA              
TITLE     2.9 A CRYSTAL STRUCTURE OF STREPTOMYCIN RNA-APTAMER                   
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: 5'-R(*GP*GP*AP*UP*CP*GP*CP*AP*UP*UP*UP*GP*GP*AP*CP*UP*UP*CP
COMPND   3 *UP*GP*CP*C)-3';                                                     
COMPND   4 CHAIN: A;                                                            
COMPND   5 ENGINEERED: YES;                                                     
COMPND   6 MOL_ID: 2;                                                           
COMPND   7 MOLECULE: 5'-R(*CP*GP*GP*CP*AP*CP*CP*AP*CP*GP*GP*UP*CP*GP*GP*AP*UP*C)
COMPND   8 -3';                                                                 
COMPND   9 CHAIN: B;                                                            
COMPND  10 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 SYNTHETIC: YES;                                                      
SOURCE   3 MOL_ID: 2;                                                           
SOURCE   4 SYNTHETIC: YES                                                       
KEYWDS    STREPTOMYCIN RNA-APTAMER, BARIUM FORM, RNA                            
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    V.TERESHKO,E.SKRIPKIN,D.J.PATEL                                       
REVDAT   4   14-FEB-24 1NTA    1       REMARK LINK                              
REVDAT   3   10-MAY-17 1NTA    1       REMARK                                   
REVDAT   2   24-FEB-09 1NTA    1       VERSN                                    
REVDAT   1   13-MAY-03 1NTA    0                                                
JRNL        AUTH   V.TERESHKO,E.SKRIPKIN,D.J.PATEL                              
JRNL        TITL   ENCAPSULATING STREPTOMYCIN WITHIN A SMALL 40-MER RNA         
JRNL        REF    CHEM.BIOL.                    V.  10   175 2003              
JRNL        REFN                   ISSN 1074-5521                               
JRNL        PMID   12618190                                                     
JRNL        DOI    10.1016/S1074-5521(03)00024-3                                
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.90 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : REFMAC 5.1.13                                        
REMARK   3   AUTHORS     : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER,              
REMARK   3               : NICHOLLS,WINN,LONG,VAGIN                             
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : MAXIMUM LIKELIHOOD                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.90                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 20.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : NULL                           
REMARK   3   COMPLETENESS FOR RANGE        (%) : 99.2                           
REMARK   3   NUMBER OF REFLECTIONS             : 3423                           
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   CROSS-VALIDATION METHOD          : THROUGHOUT                      
REMARK   3   FREE R VALUE TEST SET SELECTION  : RANDOM                          
REMARK   3   R VALUE     (WORKING + TEST SET) : 0.228                           
REMARK   3   R VALUE            (WORKING SET) : 0.222                           
REMARK   3   FREE R VALUE                     : 0.282                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 9.400                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 356                             
REMARK   3                                                                      
REMARK   3  FIT IN THE HIGHEST RESOLUTION BIN.                                  
REMARK   3   TOTAL NUMBER OF BINS USED           : 20                           
REMARK   3   BIN RESOLUTION RANGE HIGH       (A) : 2.90                         
REMARK   3   BIN RESOLUTION RANGE LOW        (A) : 2.98                         
REMARK   3   REFLECTION IN BIN     (WORKING SET) : 235                          
REMARK   3   BIN COMPLETENESS (WORKING+TEST) (%) : NULL                         
REMARK   3   BIN R VALUE           (WORKING SET) : 0.3410                       
REMARK   3   BIN FREE R VALUE SET COUNT          : 25                           
REMARK   3   BIN FREE R VALUE                    : 0.3750                       
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS            : 0                                       
REMARK   3   NUCLEIC ACID ATOMS       : 842                                     
REMARK   3   HETEROGEN ATOMS          : 45                                      
REMARK   3   SOLVENT ATOMS            : 0                                       
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   B VALUE TYPE : UNVERIFIED                                          
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 44.59                          
REMARK   3   OVERALL ANISOTROPIC B VALUE.                                       
REMARK   3    B11 (A**2) : 0.39000                                              
REMARK   3    B22 (A**2) : 0.39000                                              
REMARK   3    B33 (A**2) : -0.79000                                             
REMARK   3    B12 (A**2) : 0.00000                                              
REMARK   3    B13 (A**2) : 0.00000                                              
REMARK   3    B23 (A**2) : 0.00000                                              
REMARK   3                                                                      
REMARK   3  ESTIMATED OVERALL COORDINATE ERROR.                                 
REMARK   3   ESU BASED ON R VALUE                            (A): NULL          
REMARK   3   ESU BASED ON FREE R VALUE                       (A): 0.434         
REMARK   3   ESU BASED ON MAXIMUM LIKELIHOOD                 (A): 0.403         
REMARK   3   ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 22.380        
REMARK   3                                                                      
REMARK   3 CORRELATION COEFFICIENTS.                                            
REMARK   3   CORRELATION COEFFICIENT FO-FC      : 0.943                         
REMARK   3   CORRELATION COEFFICIENT FO-FC FREE : 0.905                         
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM IDEAL VALUES        COUNT    RMS    WEIGHT      
REMARK   3   BOND LENGTHS REFINED ATOMS        (A):   985 ; 0.012 ; 0.021       
REMARK   3   BOND LENGTHS OTHERS               (A):   332 ; 0.002 ; 0.020       
REMARK   3   BOND ANGLES REFINED ATOMS   (DEGREES):  1521 ; 1.782 ; 2.141       
REMARK   3   BOND ANGLES OTHERS          (DEGREES):   865 ; 0.913 ; 2.008       
REMARK   3   TORSION ANGLES, PERIOD 1    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 2    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 3    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   TORSION ANGLES, PERIOD 4    (DEGREES):  NULL ;  NULL ;  NULL       
REMARK   3   CHIRAL-CENTER RESTRAINTS       (A**3):   175 ; 0.119 ; 0.200       
REMARK   3   GENERAL PLANES REFINED ATOMS      (A):   416 ; 0.009 ; 0.020       
REMARK   3   GENERAL PLANES OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED CONTACTS REFINED ATOMS (A):   284 ; 0.190 ; 0.200       
REMARK   3   NON-BONDED CONTACTS OTHERS        (A):   462 ; 0.246 ; 0.200       
REMARK   3   NON-BONDED TORSION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   NON-BONDED TORSION OTHERS         (A):   206 ; 0.092 ; 0.200       
REMARK   3   H-BOND (X...Y) REFINED ATOMS      (A):    22 ; 0.208 ; 0.200       
REMARK   3   H-BOND (X...Y) OTHERS             (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION REFINED ATOMS (A):  NULL ;  NULL ;  NULL       
REMARK   3   POTENTIAL METAL-ION OTHERS        (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY VDW REFINED ATOMS        (A):    20 ; 0.154 ; 0.200       
REMARK   3   SYMMETRY VDW OTHERS               (A):    16 ; 0.297 ; 0.200       
REMARK   3   SYMMETRY H-BOND REFINED ATOMS     (A):     3 ; 0.124 ; 0.200       
REMARK   3   SYMMETRY H-BOND OTHERS            (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION REFINED ATOMS  (A):  NULL ;  NULL ;  NULL       
REMARK   3   SYMMETRY METAL-ION OTHERS         (A):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  ISOTROPIC THERMAL FACTOR RESTRAINTS.     COUNT   RMS    WEIGHT      
REMARK   3   MAIN-CHAIN BOND REFINED ATOMS  (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE REFINED ATOMS (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   MAIN-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN BOND REFINED ATOMS  (A**2):   985 ; 1.406 ; 3.000       
REMARK   3   SIDE-CHAIN BOND OTHER ATOMS    (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SIDE-CHAIN ANGLE REFINED ATOMS (A**2):  1521 ; 2.181 ; 4.500       
REMARK   3   SIDE-CHAIN ANGLE OTHER ATOMS   (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B REFINED ATOMS     (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   LONG RANGE B OTHER ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3 ANISOTROPIC THERMAL FACTOR RESTRAINTS.    COUNT   RMS   WEIGHT       
REMARK   3   RIGID-BOND RESTRAINTS          (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; FREE ATOMS         (A**2):  NULL ;  NULL ;  NULL       
REMARK   3   SPHERICITY; BONDED ATOMS       (A**2):  NULL ;  NULL ;  NULL       
REMARK   3                                                                      
REMARK   3  NCS RESTRAINTS STATISTICS                                           
REMARK   3   NUMBER OF DIFFERENT NCS GROUPS : NULL                              
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : 3                                          
REMARK   3                                                                      
REMARK   3   TLS GROUP : 1                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 1                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   A     1        A    22                          
REMARK   3    ORIGIN FOR THE GROUP (A):  13.0799  30.8119  -1.2924              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.1813 T22:   0.6532                                     
REMARK   3      T33:   0.5584 T12:   0.2295                                     
REMARK   3      T13:   0.1883 T23:  -0.1245                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   7.7466 L22:  10.0380                                     
REMARK   3      L33:   7.8579 L12:   0.4408                                     
REMARK   3      L13:   1.6534 L23:  -3.5847                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.1307 S12:   0.7432 S13:  -0.2222                       
REMARK   3      S21:   0.2338 S22:  -0.0302 S23:  -0.2004                       
REMARK   3      S31:   0.3579 S32:  -0.1869 S33:  -0.1004                       
REMARK   3                                                                      
REMARK   3   TLS GROUP : 2                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 1                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   B   101        B   118                          
REMARK   3    ORIGIN FOR THE GROUP (A):  13.1693  29.2666   3.9548              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.3564 T22:   0.6083                                     
REMARK   3      T33:   0.6156 T12:   0.3076                                     
REMARK   3      T13:   0.1414 T23:  -0.1490                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:   3.6816 L22:   3.0885                                     
REMARK   3      L33:   5.7218 L12:   2.4372                                     
REMARK   3      L13:  -0.9068 L23:  -4.6121                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:   0.0911 S12:   0.3214 S13:  -0.7150                       
REMARK   3      S21:   0.5537 S22:  -0.4629 S23:  -0.4368                       
REMARK   3      S31:  -0.7292 S32:  -0.3669 S33:   0.3718                       
REMARK   3                                                                      
REMARK   3   TLS GROUP : 3                                                      
REMARK   3    NUMBER OF COMPONENTS GROUP : 2                                    
REMARK   3    COMPONENTS        C SSSEQI   TO  C SSSEQI                         
REMARK   3    RESIDUE RANGE :   A    23        A    26                          
REMARK   3    RESIDUE RANGE :   B     1        B     3                          
REMARK   3    ORIGIN FOR THE GROUP (A):   2.9837  35.7721  -1.4981              
REMARK   3    T TENSOR                                                          
REMARK   3      T11:   0.6686 T22:   1.0763                                     
REMARK   3      T33:   0.8350 T12:   0.2757                                     
REMARK   3      T13:  -0.0835 T23:   0.2795                                     
REMARK   3    L TENSOR                                                          
REMARK   3      L11:  -8.5416 L22:  12.0907                                     
REMARK   3      L33:   9.2626 L12:   1.2429                                     
REMARK   3      L13:  -0.7425 L23:   3.3035                                     
REMARK   3    S TENSOR                                                          
REMARK   3      S11:  -0.7625 S12:   0.1488 S13:   0.4682                       
REMARK   3      S21:   0.2028 S22:   0.6698 S23:   0.7633                       
REMARK   3      S31:  -0.8524 S32:  -1.2747 S33:   0.0927                       
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED : BABINET MODEL WITH MASK                              
REMARK   3   PARAMETERS FOR MASK CALCULATION                                    
REMARK   3   VDW PROBE RADIUS   : 1.40                                          
REMARK   3   ION PROBE RADIUS   : 0.80                                          
REMARK   3   SHRINKAGE RADIUS   : 0.80                                          
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN ADDED IN THE RIDING   
REMARK   3  POSITIONS                                                           
REMARK   4                                                                      
REMARK   4 1NTA COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 03-MAR-03.                  
REMARK 100 THE DEPOSITION ID IS D_1000018182.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 17-MAY-02                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 5.6                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : N                                  
REMARK 200  RADIATION SOURCE               : ROTATING ANODE                     
REMARK 200  BEAMLINE                       : NULL                               
REMARK 200  X-RAY GENERATOR MODEL          : RIGAKU RUH3R                       
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.5418                             
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : MIRRORS                            
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : IMAGE PLATE                        
REMARK 200  DETECTOR MANUFACTURER          : RIGAKU RAXIS IV++                  
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 4018                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.900                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 30.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : NULL                               
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 99.7                               
REMARK 200  DATA REDUNDANCY                : 9.500                              
REMARK 200  R MERGE                    (I) : 0.05400                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : NULL                               
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.85                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.95                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 99.0                               
REMARK 200  DATA REDUNDANCY IN SHELL       : NULL                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.65000                            
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: SAD                          
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   (%): 63.27                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.35                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: MES BUFFER, BARIUM CLORIDE, MAGNESIUM    
REMARK 280  CLORIDE, SODIUM CLORIDE, MPD, PH 5.6, VAPOR DIFFUSION, HANGING      
REMARK 280  DROP, TEMPERATURE 298K                                              
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: I 4                              
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+1/2,Y+1/2,Z+1/2                                       
REMARK 290       6555   -X+1/2,-Y+1/2,Z+1/2                                     
REMARK 290       7555   -Y+1/2,X+1/2,Z+1/2                                      
REMARK 290       8555   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       41.54850            
REMARK 290   SMTRY2   5  0.000000  1.000000  0.000000       41.54850            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000       24.73600            
REMARK 290   SMTRY1   6 -1.000000  0.000000  0.000000       41.54850            
REMARK 290   SMTRY2   6  0.000000 -1.000000  0.000000       41.54850            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       24.73600            
REMARK 290   SMTRY1   7  0.000000 -1.000000  0.000000       41.54850            
REMARK 290   SMTRY2   7  1.000000  0.000000  0.000000       41.54850            
REMARK 290   SMTRY3   7  0.000000  0.000000  1.000000       24.73600            
REMARK 290   SMTRY1   8  0.000000  1.000000  0.000000       41.54850            
REMARK 290   SMTRY2   8 -1.000000  0.000000  0.000000       41.54850            
REMARK 290   SMTRY3   8  0.000000  0.000000  1.000000       24.73600            
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: A, B                                  
REMARK 350   BIOMT1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 350   BIOMT2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 350   BIOMT3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS                                      
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3)               
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   RES CSSEQI ATM2   DEVIATION                     
REMARK 500      U A   9   O5'     U A   9   C5'    -0.059                       
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 500                                                                      
REMARK 500 GEOMETRY AND STEREOCHEMISTRY                                         
REMARK 500 SUBTOPIC: COVALENT BOND ANGLES                                       
REMARK 500                                                                      
REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES              
REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE               
REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN               
REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE).                 
REMARK 500                                                                      
REMARK 500 STANDARD TABLE:                                                      
REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1)              
REMARK 500                                                                      
REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999                        
REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996                     
REMARK 500                                                                      
REMARK 500  M RES CSSEQI ATM1   ATM2   ATM3                                     
REMARK 500      A A   8   C1' -  O4' -  C4' ANGL. DEV. =  -6.1 DEGREES          
REMARK 500      A A   8   O4' -  C1' -  N9  ANGL. DEV. =   5.4 DEGREES          
REMARK 500      C B 107   C3' -  O3' -  P   ANGL. DEV. =   7.5 DEGREES          
REMARK 500      G B 110   C3' -  O3' -  P   ANGL. DEV. =  -7.9 DEGREES          
REMARK 500      U B 117   C3' -  O3' -  P   ANGL. DEV. =  -7.5 DEGREES          
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                              BA A  23  BA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   G A   6   N7                                                     
REMARK 620 2   G A   6   O6   62.2                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              NA A  24  NA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   C A   7   OP2                                                    
REMARK 620 2   U A  10   OP2 162.5                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              BA B   1  BA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   U A  10   O2                                                     
REMARK 620 2   U A  11   O4   76.5                                              
REMARK 620 3   C B 109   O5' 103.8  76.6                                        
REMARK 620 4   C B 109   O4'  56.3  56.2  49.4                                  
REMARK 620 5   C B 109   OP2 149.3 102.0  47.5  96.9                            
REMARK 620 N                    1     2     3     4                             
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              NA A  25  NA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   C A  15   OP2                                                    
REMARK 620 2   U A  16   O4   72.4                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              BA B   3  BA                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   G B 114   O6                                                     
REMARK 620 2   G B 115   O6   58.7                                              
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 BA B 1                    
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BA A 23                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BA B 3                    
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA A 24                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC5                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA A 25                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC6                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SRY A 26                  
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 1NTB   RELATED DB: PDB                                   
REMARK 900 2.9 A CRYSTAL STRUCTURE OF STREPTOMYCIN RNA-APTAMER COMPLEX          
REMARK 900 (MAGNESIUM FORM)                                                     
DBREF  1NTA A    1    22  PDB    1NTA     1NTA             1     22             
DBREF  1NTA B  101   118  PDB    1NTA     1NTA           101    118             
SEQRES   1 A   22    G   G   A   U   C   G   C   A   U   U   U   G   G          
SEQRES   2 A   22    A   C   U   U   C   U   G   C   C                          
SEQRES   1 B   18    C   G   G   C   A   C   C   A   C   G   G   U   C          
SEQRES   2 B   18    G   G   A   U   C                                          
HET     BA  A  23       1                                                       
HET     NA  A  24       1                                                       
HET     NA  A  25       1                                                       
HET    SRY  A  26      40                                                       
HET     BA  B   1       1                                                       
HET     BA  B   3       1                                                       
HETNAM      BA BARIUM ION                                                       
HETNAM      NA SODIUM ION                                                       
HETNAM     SRY STREPTOMYCIN                                                     
HETSYN     SRY STREPTOMYCIN A                                                   
FORMUL   3   BA    3(BA 2+)                                                     
FORMUL   4   NA    2(NA 1+)                                                     
FORMUL   6  SRY    C21 H39 N7 O12                                               
LINK         N7    G A   6                BA    BA A  23     1555   1555  3.14  
LINK         O6    G A   6                BA    BA A  23     1555   1555  2.74  
LINK         OP2   C A   7                NA    NA A  24     1555   1555  2.19  
LINK         OP2   U A  10                NA    NA A  24     1555   1555  2.18  
LINK         O2    U A  10                BA    BA B   1     1555   1555  2.96  
LINK         O4    U A  11                BA    BA B   1     1555   1555  2.71  
LINK         OP2   C A  15                NA    NA A  25     1555   1555  2.18  
LINK         O4    U A  16                NA    NA A  25     1555   1555  2.59  
LINK        BA    BA B   1                 O5'   C B 109     1555   1555  2.97  
LINK        BA    BA B   1                 O4'   C B 109     1555   1555  3.46  
LINK        BA    BA B   1                 OP2   C B 109     1555   1555  3.26  
LINK        BA    BA B   3                 O6    G B 114     1555   1555  3.32  
LINK        BA    BA B   3                 O6    G B 115     1555   1555  2.99  
SITE     1 AC1  3   U A  10    U A  11    C B 109                               
SITE     1 AC2  1   G A   6                                                     
SITE     1 AC3  2   G B 114    G B 115                                          
SITE     1 AC4  3   C A   7    A A   8    U A  10                               
SITE     1 AC5  3   G A  12    C A  15    U A  16                               
SITE     1 AC6 12   U A  11    G A  12    C A  15    U A  16                    
SITE     2 AC6 12   U A  17    A B 105    C B 106    C B 107                    
SITE     3 AC6 12   A B 108    C B 109    G B 110    G B 111                    
CRYST1   83.097   83.097   49.472  90.00  90.00  90.00 I 4           8          
ORIGX1      1.000000  0.000000  0.000000        0.00000                         
ORIGX2      0.000000  1.000000  0.000000        0.00000                         
ORIGX3      0.000000  0.000000  1.000000        0.00000                         
SCALE1      0.012034  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.012034  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.020213        0.00000