HEADER    RNA                                     12-APR-21   7ELR              
TITLE     CRYSTAL STRUCTURE OF XANTHINE RIBOSWITCH WITH XANTHINE                
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: NMT1 (46-MER);                                             
COMPND   3 CHAIN: A, B;                                                         
COMPND   4 ENGINEERED: YES                                                      
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 ORGANISM_SCIENTIFIC: IDEONELLA SP. B508-1;                           
SOURCE   3 ORGANISM_TAXID: 137716;                                              
SOURCE   4 EXPRESSION_SYSTEM: IN VITRO TRANSCRIPTION VECTOR PT7-TP(DELTAI);     
SOURCE   5 EXPRESSION_SYSTEM_TAXID: 905931                                      
KEYWDS    RIBOSWITCH, XANTHINE, RNA                                             
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    X.C.XU,A.M.REN                                                        
REVDAT   3   29-NOV-23 7ELR    1       REMARK                                   
REVDAT   2   21-JUL-21 7ELR    1       JRNL                                     
REVDAT   1   30-JUN-21 7ELR    0                                                
JRNL        AUTH   X.XU,M.EGGER,H.CHEN,K.BARTOSIK,R.MICURA,A.REN                
JRNL        TITL   INSIGHTS INTO XANTHINE RIBOSWITCH STRUCTURE AND METAL        
JRNL        TITL 2 ION-MEDIATED LIGAND RECOGNITION.                             
JRNL        REF    NUCLEIC ACIDS RES.            V.  49  7139 2021              
JRNL        REFN                   ESSN 1362-4962                               
JRNL        PMID   34125892                                                     
JRNL        DOI    10.1093/NAR/GKAB486                                          
REMARK   2                                                                      
REMARK   2 RESOLUTION.    2.66 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : PHENIX 1.18.2_3874                                   
REMARK   3   AUTHORS     : PAUL ADAMS,PAVEL AFONINE,VINCENT CHEN,IAN            
REMARK   3               : DAVIS,KRESHNA GOPAL,RALF GROSSE-KUNSTLEVE,           
REMARK   3               : LI-WEI HUNG,ROBERT IMMORMINO,TOM IOERGER,            
REMARK   3               : AIRLIE MCCOY,ERIK MCKEE,NIGEL MORIARTY,              
REMARK   3               : REETAL PAI,RANDY READ,JANE RICHARDSON,               
REMARK   3               : DAVID RICHARDSON,TOD ROMO,JIM SACCHETTINI,           
REMARK   3               : NICHOLAS SAUTER,JACOB SMITH,LAURENT                  
REMARK   3               : STORONI,TOM TERWILLIGER,PETER ZWART                  
REMARK   3                                                                      
REMARK   3    REFINEMENT TARGET : ML                                            
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 2.66                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 48.12                          
REMARK   3   MIN(FOBS/SIGMA_FOBS)              : 1.360                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 96.8                           
REMARK   3   NUMBER OF REFLECTIONS             : 9427                           
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT.                                     
REMARK   3   R VALUE     (WORKING + TEST SET) : 0.244                           
REMARK   3   R VALUE            (WORKING SET) : 0.243                           
REMARK   3   FREE R VALUE                     : 0.265                           
REMARK   3   FREE R VALUE TEST SET SIZE   (%) : 5.050                           
REMARK   3   FREE R VALUE TEST SET COUNT      : 476                             
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT (IN BINS).                           
REMARK   3   BIN  RESOLUTION RANGE  COMPL.    NWORK NFREE   RWORK  RFREE        
REMARK   3     1 48.1200 -  3.8400    0.99     3180   162  0.2216 0.2432        
REMARK   3     2  3.8400 -  3.0500    0.99     3018   164  0.2714 0.2870        
REMARK   3     3  3.0500 -  2.6600    0.92     2753   150  0.3584 0.3735        
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELLING.                                             
REMARK   3   METHOD USED        : FLAT BULK SOLVENT MODEL                       
REMARK   3   SOLVENT RADIUS     : 1.11                                          
REMARK   3   SHRINKAGE RADIUS   : 0.90                                          
REMARK   3   K_SOL              : NULL                                          
REMARK   3   B_SOL              : NULL                                          
REMARK   3                                                                      
REMARK   3  ERROR ESTIMATES.                                                    
REMARK   3   COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED)     : 0.370            
REMARK   3   PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : 41.990           
REMARK   3                                                                      
REMARK   3  B VALUES.                                                           
REMARK   3   FROM WILSON PLOT           (A**2) : NULL                           
REMARK   3   MEAN B VALUE      (OVERALL, A**2) : 100.0                          
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  TWINNING INFORMATION.                                               
REMARK   3   FRACTION: NULL                                                     
REMARK   3   OPERATOR: NULL                                                     
REMARK   3                                                                      
REMARK   3  DEVIATIONS FROM IDEAL VALUES.                                       
REMARK   3                 RMSD          COUNT                                  
REMARK   3   BOND      :   NULL           NULL                                  
REMARK   3   ANGLE     :   NULL           NULL                                  
REMARK   3   CHIRALITY :   NULL           NULL                                  
REMARK   3   PLANARITY :   NULL           NULL                                  
REMARK   3   DIHEDRAL  :   NULL           NULL                                  
REMARK   3                                                                      
REMARK   3  TLS DETAILS                                                         
REMARK   3   NUMBER OF TLS GROUPS  : NULL                                       
REMARK   3                                                                      
REMARK   3  NCS DETAILS                                                         
REMARK   3   NUMBER OF NCS GROUPS : NULL                                        
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 7ELR COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 13-APR-21.                  
REMARK 100 THE DEPOSITION ID IS D_1300021250.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 23-OCT-20                          
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               : SSRF                               
REMARK 200  BEAMLINE                       : BL19U1                             
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 1.102                              
REMARK 200  MONOCHROMATOR                  : NULL                               
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : PIXEL                              
REMARK 200  DETECTOR MANUFACTURER          : DECTRIS PILATUS 6M                 
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : HKL-3000                           
REMARK 200  DATA SCALING SOFTWARE          : HKL-3000                           
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 9559                               
REMARK 200  RESOLUTION RANGE HIGH      (A) : 2.660                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 50.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : NULL                               
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 98.0                               
REMARK 200  DATA REDUNDANCY                : 12.00                              
REMARK 200  R MERGE                    (I) : 0.10000                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 4.2000                             
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.66                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 2.76                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 84.9                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 9.60                               
REMARK 200  R MERGE FOR SHELL          (I) : 1.04700                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : NULL                               
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: PHASER                                                
REMARK 200 STARTING MODEL: 7ELP                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 55.39                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.76                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: 0.1 M MES, PH 6.0, 0.2 M CALCIUM         
REMARK 280  ACETATE, 10% (V/V) ISOPROPANOL, VAPOR DIFFUSION, SITTING DROP,      
REMARK 280  TEMPERATURE 289K                                                    
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 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   -X+1/2,Y+1/2,-Z                                         
REMARK 290       4555   X+1/2,-Y+1/2,-Z                                         
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   3 -1.000000  0.000000  0.000000       40.21950            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       48.12350            
REMARK 290   SMTRY3   3  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   4  1.000000  0.000000  0.000000       40.21950            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000       48.12350            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1, 2                                                    
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC                  
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 430 ANGSTROM**2                           
REMARK 350 SURFACE AREA OF THE COMPLEX: 8040 ANGSTROM**2                        
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -8.0 KCAL/MOL                         
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                                                                      
REMARK 350 BIOMOLECULE: 2                                                       
REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC                         
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC                  
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 420 ANGSTROM**2                           
REMARK 350 SURFACE AREA OF THE COMPLEX: 8000 ANGSTROM**2                        
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -7.0 KCAL/MOL                         
REMARK 350 APPLY THE FOLLOWING TO CHAINS: 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: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT                     
REMARK 500                                                                      
REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT.                            
REMARK 500                                                                      
REMARK 500  ATM1  RES C  SSEQI   ATM2  RES C  SSEQI           DISTANCE          
REMARK 500   OP1    G B     2     O3'  GTP B   101              1.94            
REMARK 500   O5'    G A     2     O3'  GTP A   101              1.96            
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                              MG A 104  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   A A   6   O2'                                                    
REMARK 620 2   G A   7   OP1  82.9                                              
REMARK 620 3   C A  33   OP1 127.9 105.4                                        
REMARK 620 4 HOH A 209   O    77.0 158.4  93.3                                  
REMARK 620 5 HOH A 212   O    72.0  98.7  56.0  82.7                            
REMARK 620 6 HOH A 219   O   161.6  97.4  34.2 104.2  89.8                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG A 106  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   G A   7   OP2                                                    
REMARK 620 2 XAN A 102   O6   83.9                                              
REMARK 620 3 HOH A 210   O    72.2 155.4                                        
REMARK 620 4 HOH A 213   O    88.2  80.9  92.7                                  
REMARK 620 5 HOH A 216   O    88.6  94.9  90.0 174.9                            
REMARK 620 6 HOH A 217   O   167.8 108.3  95.7  93.7  90.3                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG A 109  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   C A  33   O3'                                                    
REMARK 620 2   C A  34   OP1  43.7                                              
REMARK 620 3   C A  34   OP2  60.3  44.3                                        
REMARK 620 4   G A  35   OP1  61.8  18.9  40.8                                  
REMARK 620 5   G A  36   OP1  76.0  38.6  73.3  32.6                            
REMARK 620 6 HOH A 205   O    65.7  34.5  75.6  35.8  13.0                      
REMARK 620 7 HOH A 208   O    52.4  16.3  59.1  23.1  24.3  18.2                
REMARK 620 N                    1     2     3     4     5     6                 
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG A 105  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   A A  38   OP2                                                    
REMARK 620 2 HOH A 206   O   102.5                                              
REMARK 620 3 HOH A 211   O    86.9 170.0                                        
REMARK 620 4 HOH A 214   O    87.1  67.5 116.9                                  
REMARK 620 5 HOH A 222   O   148.1  98.2  74.8  78.6                            
REMARK 620 6 HOH A 227   O   105.1 108.6  65.0 167.8  90.7                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG A 103  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH A 201   O                                                      
REMARK 620 2 HOH A 207   O   103.2                                              
REMARK 620 3 HOH A 223   O    95.1  88.0                                        
REMARK 620 4 HOH A 225   O    93.7 163.1  89.2                                  
REMARK 620 5 HOH A 230   O    56.5 110.1 148.5  80.3                            
REMARK 620 6 HOH A 233   O   162.6  60.5  90.5 102.9 120.8                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG A 107  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH A 202   O                                                      
REMARK 620 2 HOH A 204   O   119.4                                              
REMARK 620 3 HOH A 218   O    87.7 125.2                                        
REMARK 620 4 HOH A 226   O    57.9  87.7 142.5                                  
REMARK 620 N                    1     2     3                                   
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG A 108  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH A 220   O                                                      
REMARK 620 2 HOH A 221   O   114.4                                              
REMARK 620 3 HOH A 224   O   144.7  62.5                                        
REMARK 620 4 HOH A 228   O   104.9 102.0 110.1                                  
REMARK 620 5 HOH A 229   O    57.9  81.4  87.8 161.4                            
REMARK 620 6 HOH A 234   O    74.2 166.4 104.3  85.0  95.7                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG B 109  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   G B   2   OP2                                                    
REMARK 620 2 GTP B 101   O2A 134.5                                              
REMARK 620 3 HOH B 207   O   130.7  56.6                                        
REMARK 620 4 HOH B 209   O    86.7  67.3  50.4                                  
REMARK 620 5 HOH B 217   O    91.5 111.9  55.3  70.2                            
REMARK 620 6 HOH B 218   O   143.4  77.0  78.9 128.2  91.1                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG B 103  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   A B   6   O3'                                                    
REMARK 620 2   A B   6   O2'  57.4                                              
REMARK 620 3   G B   7   OP2  56.6  80.4                                        
REMARK 620 4 XAN B 102   O6  129.6  73.7 129.8                                  
REMARK 620 5 HOH B 201   O    94.6 151.7  79.9 134.6                            
REMARK 620 6 HOH B 206   O   124.1 107.9  68.2  79.9  83.2                      
REMARK 620 7 HOH B 210   O    74.6  97.0 123.5 102.0  77.4 154.4                
REMARK 620 8 HOH B 213   O   148.1 138.2 138.2  68.0  68.0  81.6  75.7          
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 105  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   G B  20   O6                                                     
REMARK 620 2 HOH B 208   O    95.1                                              
REMARK 620 N                    1                                               
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG B 104  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1   A B  38   OP2                                                    
REMARK 620 2 HOH B 205   O    70.0                                              
REMARK 620 3 HOH B 212   O   157.6  89.7                                        
REMARK 620 4 HOH B 214   O    89.1  79.7  77.6                                  
REMARK 620 5 HOH B 216   O   115.3  89.7  72.6 148.3                            
REMARK 620 6 HOH B 219   O   120.8 161.8  76.6  85.7  97.4                      
REMARK 620 N                    1     2     3     4     5                       
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG B 107  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH B 202   O                                                      
REMARK 620 2 HOH B 204   O   103.0                                              
REMARK 620 N                    1                                               
DBREF  7ELR A    2    46  PDB    7ELR     7ELR             2     46             
DBREF  7ELR B    2    46  PDB    7ELR     7ELR             2     46             
SEQRES   1 A   45    G   A   G   U   A   G   A   A   G   C   G   U   U          
SEQRES   2 A   45    C   A   G   C   G   G   C   C   G   A   A   A   G          
SEQRES   3 A   45    G   C   C   G   C   C   C   G   G   A   A   A   U          
SEQRES   4 A   45    U   G   C   U   C   C                                      
SEQRES   1 B   45    G   A   G   U   A   G   A   A   G   C   G   U   U          
SEQRES   2 B   45    C   A   G   C   G   G   C   C   G   A   A   A   G          
SEQRES   3 B   45    G   C   C   G   C   C   C   G   G   A   A   A   U          
SEQRES   4 B   45    U   G   C   U   C   C                                      
HET    GTP  A 101      32                                                       
HET    XAN  A 102      11                                                       
HET     MG  A 103       1                                                       
HET     MG  A 104       1                                                       
HET     MG  A 105       1                                                       
HET     MG  A 106       1                                                       
HET     MG  A 107       1                                                       
HET     MG  A 108       1                                                       
HET     MG  A 109       1                                                       
HET     MG  A 110       1                                                       
HET    GTP  B 101      32                                                       
HET    XAN  B 102      11                                                       
HET     MG  B 103       1                                                       
HET     MG  B 104       1                                                       
HET     MG  B 105       1                                                       
HET     MG  B 106       1                                                       
HET     MG  B 107       1                                                       
HET     MG  B 108       1                                                       
HET     MG  B 109       1                                                       
HETNAM     GTP GUANOSINE-5'-TRIPHOSPHATE                                        
HETNAM     XAN XANTHINE                                                         
HETNAM      MG MAGNESIUM ION                                                    
FORMUL   3  GTP    2(C10 H16 N5 O14 P3)                                         
FORMUL   4  XAN    2(C5 H4 N4 O2)                                               
FORMUL   5   MG    15(MG 2+)                                                    
FORMUL  22  HOH   *54(H2 O)                                                     
LINK         P     G A   2                 O3' GTP A 101     1555   1555  1.59  
LINK         P     G B   2                 O3' GTP B 101     1555   1555  1.58  
LINK         O2'   A A   6                MG    MG A 104     1555   1555  2.67  
LINK         OP1   G A   7                MG    MG A 104     1555   1555  1.98  
LINK         OP2   G A   7                MG    MG A 106     1555   1555  2.56  
LINK         OP1   C A  33                MG    MG A 104     1555   2655  1.99  
LINK         O3'   C A  33                MG    MG A 109     1555   2655  2.81  
LINK         OP1   C A  34                MG    MG A 109     1555   1555  2.51  
LINK         OP2   C A  34                MG    MG A 109     1555   2655  2.01  
LINK         OP1   G A  35                MG    MG A 109     1555   1555  2.16  
LINK         OP1   G A  36                MG    MG A 109     1555   1555  2.56  
LINK         OP2   A A  38                MG    MG A 105     1555   1555  1.95  
LINK         O6  XAN A 102                MG    MG A 106     1555   1555  2.29  
LINK        MG    MG A 103                 O   HOH A 201     1555   1555  2.13  
LINK        MG    MG A 103                 O   HOH A 207     1555   1555  2.19  
LINK        MG    MG A 103                 O   HOH A 223     1555   1555  2.40  
LINK        MG    MG A 103                 O   HOH A 225     1555   1555  2.27  
LINK        MG    MG A 103                 O   HOH A 230     1555   1555  2.97  
LINK        MG    MG A 103                 O   HOH A 233     1555   1555  2.27  
LINK        MG    MG A 104                 O   HOH A 209     1555   1555  2.34  
LINK        MG    MG A 104                 O   HOH A 212     1555   1555  1.94  
LINK        MG    MG A 104                 O   HOH A 219     1555   2655  1.98  
LINK        MG    MG A 105                 O   HOH A 206     1555   1555  2.05  
LINK        MG    MG A 105                 O   HOH A 211     1555   1555  2.03  
LINK        MG    MG A 105                 O   HOH A 214     1555   1555  2.11  
LINK        MG    MG A 105                 O   HOH A 222     1555   1555  1.95  
LINK        MG    MG A 105                 O   HOH A 227     1555   1555  2.68  
LINK        MG    MG A 106                 O   HOH A 210     1555   1555  2.03  
LINK        MG    MG A 106                 O   HOH A 213     1555   1555  2.92  
LINK        MG    MG A 106                 O   HOH A 216     1555   1555  2.52  
LINK        MG    MG A 106                 O   HOH A 217     1555   1555  1.99  
LINK        MG    MG A 107                 O   HOH A 202     1555   1555  2.42  
LINK        MG    MG A 107                 O   HOH A 204     1555   1555  2.10  
LINK        MG    MG A 107                 O   HOH A 218     1555   1555  2.09  
LINK        MG    MG A 107                 O   HOH A 226     1555   1555  2.39  
LINK        MG    MG A 108                 O   HOH A 220     1555   1555  2.17  
LINK        MG    MG A 108                 O   HOH A 221     1555   1555  2.37  
LINK        MG    MG A 108                 O   HOH A 224     1555   1555  2.10  
LINK        MG    MG A 108                 O   HOH A 228     1555   1555  2.17  
LINK        MG    MG A 108                 O   HOH A 229     1555   1555  2.48  
LINK        MG    MG A 108                 O   HOH A 234     1555   1555  2.27  
LINK        MG    MG A 109                 O   HOH A 205     1555   1555  2.02  
LINK        MG    MG A 109                 O   HOH A 208     1555   1555  1.97  
LINK         OP2   G B   2                MG    MG B 109     1555   1555  2.11  
LINK         O3'   A B   6                MG    MG B 103     1555   1555  2.93  
LINK         O2'   A B   6                MG    MG B 103     1555   1555  2.82  
LINK         OP2   G B   7                MG    MG B 103     1555   1555  2.12  
LINK         OP2   A B  16                MG    MG B 108     1555   1555  2.56  
LINK         O6    G B  20                MG    MG B 105     1555   1555  2.81  
LINK         OP1   G B  35                MG    MG B 106     1555   1555  2.11  
LINK         OP2   A B  38                MG    MG B 104     1555   1555  2.60  
LINK         O2A GTP B 101                MG    MG B 109     1555   1555  2.99  
LINK         O6  XAN B 102                MG    MG B 103     1555   1555  2.32  
LINK        MG    MG B 103                 O   HOH B 201     1555   1555  2.19  
LINK        MG    MG B 103                 O   HOH B 206     1555   1555  2.68  
LINK        MG    MG B 103                 O   HOH B 210     1555   1555  2.47  
LINK        MG    MG B 103                 O   HOH B 213     1555   1555  2.96  
LINK        MG    MG B 104                 O   HOH B 205     1555   1555  2.05  
LINK        MG    MG B 104                 O   HOH B 212     1555   1555  2.07  
LINK        MG    MG B 104                 O   HOH B 214     1555   1555  2.41  
LINK        MG    MG B 104                 O   HOH B 216     1555   1555  2.35  
LINK        MG    MG B 104                 O   HOH B 219     1555   1555  1.97  
LINK        MG    MG B 105                 O   HOH B 208     1555   1555  2.40  
LINK        MG    MG B 107                 O   HOH B 202     1555   1555  2.40  
LINK        MG    MG B 107                 O   HOH B 204     1555   1555  2.52  
LINK        MG    MG B 109                 O   HOH B 207     1555   1555  2.87  
LINK        MG    MG B 109                 O   HOH B 209     1555   1555  2.10  
LINK        MG    MG B 109                 O   HOH B 217     1555   1555  2.36  
LINK        MG    MG B 109                 O   HOH B 218     1555   1555  2.35  
CRYST1   80.439   96.247   41.475  90.00  90.00  90.00 P 21 21 2     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      0.012432  0.000000  0.000000        0.00000                         
SCALE2      0.000000  0.010390  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.024111        0.00000