HEADER    DNA/ANTIBIOTIC                          28-OCT-04   1XVR              
TITLE     ECHINOMYCIN (CGTACG)2 COMPLEX                                         
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: 5'-D(*CP*GP*TP*AP*CP*G)-3';                                
COMPND   3 CHAIN: A, C;                                                         
COMPND   4 ENGINEERED: YES;                                                     
COMPND   5 MOL_ID: 2;                                                           
COMPND   6 MOLECULE: ECHINOMYCIN;                                               
COMPND   7 CHAIN: D, E;                                                         
COMPND   8 SYNONYM: QUINOMYCIN A                                                
SOURCE    MOL_ID: 1;                                                            
SOURCE   2 SYNTHETIC: YES;                                                      
SOURCE   3 MOL_ID: 2;                                                           
SOURCE   4 ORGANISM_SCIENTIFIC: STREPTOMYCES ECHINATUS;                         
SOURCE   5 ORGANISM_TAXID: 67293                                                
KEYWDS    BISINTERCALATOR, HOOGSTEEN BASEPAIR, DEPSIPEPTIDE, QUINOXALINE,       
KEYWDS   2 THIOACETAL, ANTIBIOTIC, ANTITUMOR, DNA-ANTIBIOTIC COMPLEX            
EXPDTA    X-RAY DIFFRACTION                                                     
AUTHOR    J.A.CUESTA-SEIJO,G.M.SHELDRICK                                        
REVDAT   4   27-JUL-11 1XVR    1       REMARK                                   
REVDAT   3   13-JUL-11 1XVR    1       VERSN                                    
REVDAT   2   24-FEB-09 1XVR    1       VERSN                                    
REVDAT   1   12-APR-05 1XVR    0                                                
JRNL        AUTH   J.A.CUESTA-SEIJO,G.M.SHELDRICK                               
JRNL        TITL   STRUCTURES OF COMPLEXES BETWEEN ECHINOMYCIN AND DUPLEX DNA.  
JRNL        REF    ACTA CRYSTALLOGR.,SECT.D      V.  61   442 2005              
JRNL        REFN                   ISSN 0907-4449                               
JRNL        PMID   15805599                                                     
JRNL        DOI    10.1107/S090744490500137X                                    
REMARK   2                                                                      
REMARK   2 RESOLUTION.    1.40 ANGSTROMS.                                       
REMARK   3                                                                      
REMARK   3 REFINEMENT.                                                          
REMARK   3   PROGRAM     : SHELXL-97                                            
REMARK   3   AUTHORS     : G.M.SHELDRICK                                        
REMARK   3                                                                      
REMARK   3  DATA USED IN REFINEMENT.                                            
REMARK   3   RESOLUTION RANGE HIGH (ANGSTROMS) : 1.40                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 16.50                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 97.8                           
REMARK   3   CROSS-VALIDATION METHOD           : FREE R                         
REMARK   3   FREE R VALUE TEST SET SELECTION   : RANDOM                         
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT (NO CUTOFF).                         
REMARK   3   R VALUE   (WORKING + TEST SET, NO CUTOFF) : 0.189                  
REMARK   3   R VALUE          (WORKING SET, NO CUTOFF) : 0.189                  
REMARK   3   FREE R VALUE                  (NO CUTOFF) : 0.235                  
REMARK   3   FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : NULL                   
REMARK   3   FREE R VALUE TEST SET COUNT   (NO CUTOFF) : 1089                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (NO CUTOFF) : 10857                  
REMARK   3                                                                      
REMARK   3  FIT/AGREEMENT OF MODEL FOR DATA WITH F>4SIG(F).                     
REMARK   3   R VALUE   (WORKING + TEST SET, F>4SIG(F)) : NULL                   
REMARK   3   R VALUE          (WORKING SET, F>4SIG(F)) : NULL                   
REMARK   3   FREE R VALUE                  (F>4SIG(F)) : NULL                   
REMARK   3   FREE R VALUE TEST SET SIZE (%, F>4SIG(F)) : NULL                   
REMARK   3   FREE R VALUE TEST SET COUNT   (F>4SIG(F)) : NULL                   
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (F>4SIG(F)) : NULL                   
REMARK   3                                                                      
REMARK   3  NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT.                    
REMARK   3   PROTEIN ATOMS      : 106                                           
REMARK   3   NUCLEIC ACID ATOMS : 240                                           
REMARK   3   HETEROGEN ATOMS    : 50                                            
REMARK   3   SOLVENT ATOMS      : 43                                            
REMARK   3                                                                      
REMARK   3  MODEL REFINEMENT.                                                   
REMARK   3   OCCUPANCY SUM OF NON-HYDROGEN ATOMS      : NULL                    
REMARK   3   OCCUPANCY SUM OF HYDROGEN ATOMS          : NULL                    
REMARK   3   NUMBER OF DISCRETELY DISORDERED RESIDUES : 4                       
REMARK   3   NUMBER OF LEAST-SQUARES PARAMETERS       : NULL                    
REMARK   3   NUMBER OF RESTRAINTS                     : NULL                    
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM RESTRAINT TARGET VALUES.                        
REMARK   3   BOND LENGTHS                         (A) : NULL                    
REMARK   3   ANGLE DISTANCES                      (A) : NULL                    
REMARK   3   SIMILAR DISTANCES (NO TARGET VALUES) (A) : NULL                    
REMARK   3   DISTANCES FROM RESTRAINT PLANES      (A) : NULL                    
REMARK   3   ZERO CHIRAL VOLUMES               (A**3) : NULL                    
REMARK   3   NON-ZERO CHIRAL VOLUMES           (A**3) : NULL                    
REMARK   3   ANTI-BUMPING DISTANCE RESTRAINTS     (A) : NULL                    
REMARK   3   RIGID-BOND ADP COMPONENTS         (A**2) : NULL                    
REMARK   3   SIMILAR ADP COMPONENTS            (A**2) : NULL                    
REMARK   3   APPROXIMATELY ISOTROPIC ADPS      (A**2) : NULL                    
REMARK   3                                                                      
REMARK   3  BULK SOLVENT MODELING.                                              
REMARK   3   METHOD USED: NULL                                                  
REMARK   3                                                                      
REMARK   3  STEREOCHEMISTRY TARGET VALUES : ENGH AND HUBER                      
REMARK   3   SPECIAL CASE: NULL                                                 
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: NULL                                      
REMARK   4                                                                      
REMARK   4 1XVR COMPLIES WITH FORMAT V. 3.15, 01-DEC-08                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 12-NOV-04.                  
REMARK 100 THE RCSB ID CODE IS RCSB030820.                                      
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 11-DEC-03                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 6                                  
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : BESSY                              
REMARK 200  BEAMLINE                       : 14.1                               
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.9                                
REMARK 200  MONOCHROMATOR                  : SI-111 CRYSTAL                     
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : MAR CCD 165 MM                     
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : HKL-2000                           
REMARK 200  DATA SCALING SOFTWARE          : XDS                                
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 10857                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.400                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 16.500                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 97.8                               
REMARK 200  DATA REDUNDANCY                : 3.820                              
REMARK 200  R MERGE                    (I) : 0.05460                            
REMARK 200  R SYM                      (I) : 0.05460                            
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 12.7200                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.40                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.50                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 94.3                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 3.53                               
REMARK 200  R MERGE FOR SHELL          (I) : 0.27500                            
REMARK 200  R SYM FOR SHELL            (I) : 0.27500                            
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 4.870                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MR                           
REMARK 200 SOFTWARE USED: EPMR                                                  
REMARK 200 STARTING MODEL: NULL                                                 
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 47.32                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.35                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: MPD, MGCL2, MES, SPERMINE-HCL, PH 6,     
REMARK 280  VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 285K                     
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 1 2 1                          
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -X,Y,-Z                                                 
REMARK 290       3555   X+1/2,Y+1/2,Z                                           
REMARK 290       4555   -X+1/2,Y+1/2,-Z                                         
REMARK 290                                                                      
REMARK 290     WHERE NNN -> OPERATOR NUMBER                                     
REMARK 290           MMM -> TRANSLATION VECTOR                                  
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS                            
REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM             
REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY                
REMARK 290 RELATED MOLECULES.                                                   
REMARK 290   SMTRY1   1  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   1  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   1  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   2 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   3  1.000000  0.000000  0.000000       14.75600            
REMARK 290   SMTRY2   3  0.000000  1.000000  0.000000       31.30800            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4 -1.000000  0.000000  0.000000       14.75600            
REMARK 290   SMTRY2   4  0.000000  1.000000  0.000000       31.30800            
REMARK 290   SMTRY3   4  0.000000  0.000000 -1.000000        0.00000            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 350                                                                      
REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN           
REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE                
REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS          
REMARK 350 GIVEN BELOW.  BOTH NON-CRYSTALLOGRAPHIC AND                          
REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN.                               
REMARK 350                                                                      
REMARK 350 BIOMOLECULE: 1                                                       
REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC                 
REMARK 350 SOFTWARE USED: PISA                                                  
REMARK 350 TOTAL BURIED SURFACE AREA: 560 ANGSTROM**2                           
REMARK 350 SURFACE AREA OF THE COMPLEX: 2840 ANGSTROM**2                        
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -3.8 KCAL/MOL                         
REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, C, D, E                            
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 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      HOH E2005  LIES ON A SPECIAL POSITION.                          
REMARK 375 MG    MG A 201  LIES ON A SPECIAL POSITION.                          
REMARK 375 MG    MG C 211  LIES ON A SPECIAL POSITION.                          
REMARK 400                                                                      
REMARK 400 COMPOUND                                                             
REMARK 400 THE ECHINOMYCIN IS A BICYCLIC OCTADEPSIPEPTIDE, A MEMBER             
REMARK 400 OF THE QUINOXALINE CLASS OF ANTIBIOTICS.                             
REMARK 400                                                                      
REMARK 400 HERE, ECHINOMYCIN IS REPRESENTED BY GROUPING TOGETHER THE            
REMARK 400 SEQUENCE (SEQRES) AND TWO LIGANDS (HET) QUI.                         
REMARK 400                                                                      
REMARK 400  GROUP: 1                                                            
REMARK 400   NAME: ECHINOMYCIN                                                  
REMARK 400   CHAIN: D, E                                                        
REMARK 400   COMPONENT_1: PEPTIDE LIKE SEQUENCE RESIDUES 1 TO 8                 
REMARK 400   COMPONENT_2: QUINOXALINE CHROMOPHORE RESIDUES 0, 9                 
REMARK 400   DESCRIPTION: ECHINOMYCIN IS A BICYCLIC OCTADEPSIPEPTIDE.           
REMARK 400                BICYCLIZATION IS ACHIEVED BY LINKING THE N- AND       
REMARK 400                THE C- TERMINI, AND A THE THIOACETAL BOND BETWEEN     
REMARK 400                RESIDUES 3 AND 7.                                     
REMARK 400                THE TWO QUINOXALINE CHROMOPHORES ARE LINKED           
REMARK 400                TO THE D-SERINE RESIDUES, RESIDUES 1 AND 5.           
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     DC A   2   O4' -  C4' -  C3' ANGL. DEV. =  -3.7 DEGREES          
REMARK 500     DC A   2   C1' -  O4' -  C4' ANGL. DEV. =  -7.1 DEGREES          
REMARK 500     DC A   2   O4' -  C1' -  N1  ANGL. DEV. =   3.8 DEGREES          
REMARK 500     DG A   3   P   -  O5' -  C5' ANGL. DEV. =  10.0 DEGREES          
REMARK 500     DT A   4   O4' -  C1' -  N1  ANGL. DEV. =  -7.8 DEGREES          
REMARK 500     DA A   5   O4' -  C1' -  N9  ANGL. DEV. =  -4.7 DEGREES          
REMARK 500     DC A   6   O4' -  C1' -  N1  ANGL. DEV. =  -6.5 DEGREES          
REMARK 500     DG A   7   O5' -  C5' -  C4' ANGL. DEV. =  -5.7 DEGREES          
REMARK 500     DG A   7   O4' -  C1' -  N9  ANGL. DEV. =   2.8 DEGREES          
REMARK 500     DT C 104   O4' -  C1' -  N1  ANGL. DEV. =  -6.4 DEGREES          
REMARK 500     DT C 104   C6  -  N1  -  C2  ANGL. DEV. =  -3.9 DEGREES          
REMARK 500     DT C 104   C5  -  C6  -  N1  ANGL. DEV. =   4.2 DEGREES          
REMARK 500     DT C 104   N3  -  C2  -  O2  ANGL. DEV. =  -4.3 DEGREES          
REMARK 500     DT C 104   N3  -  C4  -  O4  ANGL. DEV. =   4.4 DEGREES          
REMARK 500     DT C 104   C4  -  C5  -  C7  ANGL. DEV. =  -3.8 DEGREES          
REMARK 500     DT C 104   C6  -  C5  -  C7  ANGL. DEV. =   5.5 DEGREES          
REMARK 500     DA C 105   N1  -  C6  -  N6  ANGL. DEV. =   4.2 DEGREES          
REMARK 500     DC C 106   O4' -  C1' -  N1  ANGL. DEV. =  -5.0 DEGREES          
REMARK 500     DG C 107   O4' -  C1' -  N9  ANGL. DEV. =   4.2 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                              MG A 201  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH A2005   O                                                      
REMARK 620 2 HOH A2006   O    91.9                                              
REMARK 620 3 HOH D2001   O    88.0  88.9                                        
REMARK 620 N                    1     2                                         
REMARK 620                                                                      
REMARK 620 COORDINATION ANGLES FOR:  M RES CSSEQI METAL                         
REMARK 620                              MG C 211  MG                            
REMARK 620 N RES CSSEQI ATOM                                                    
REMARK 620 1 HOH E2001   O                                                      
REMARK 620 2 HOH C2002   O    89.1                                              
REMARK 620 3 HOH C2003   O    88.4  89.8                                        
REMARK 620 N                    1     2                                         
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG A 201                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG C 211                  
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC3                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR CHAIN D OF ECHINOMYCIN            
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC4                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR CHAIN E OF ECHINOMYCIN            
REMARK 900                                                                      
REMARK 900 RELATED ENTRIES                                                      
REMARK 900 RELATED ID: 185D   RELATED DB: PDB                                   
REMARK 900 SOLUTION STRUCTURE OF D(GACGTC) COMPLEXED WITH TRIOSTIN A            
REMARK 900 RELATED ID: 193D   RELATED DB: PDB                                   
REMARK 900 SOLUTION STRUCTURE OF D(ACACGTGT) COMPLEXED WITH QUINOMYCIN          
REMARK 900 UK-6305                                                              
REMARK 900 RELATED ID: 1PFE   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF D(GCGTACG) COMPLEXED WITH ECHINOMYCIN           
REMARK 900 - SPACE GROUP P6322                                                  
REMARK 900 RELATED ID: 1VS2   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF D(GCGTACGC) COMPLEXED WITH TRIOSIN A            
REMARK 900 RELATED ID: 1XVK   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF D(GCGTACGC) COMPLEXED WITH ECHINOMYCIN          
REMARK 900 - SPACE GROUP P632                                                   
REMARK 900 RELATED ID: 1XVN   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF D(ACGTACGT) COMPLEXED WITH ECHINOMYCIN          
REMARK 900 - SPACE GROUP P632                                                   
REMARK 900 RELATED ID: 2ADW   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF D(ACGTACGT) COMPLEXED WITH ECHINOMYCIN          
REMARK 900 - SPACE GROUP P42212                                                 
REMARK 900 RELATED ID: 2DA8   RELATED DB: PDB                                   
REMARK 900 SOLUTION STRUCTURE OF D(GATATC) COMPLEXED WITH A MODIFIED            
REMARK 900 TRIOSTIN A AT POSITIONS 4 AND 8                                      
REMARK 900 RELATED ID: 3GO3   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF D(ACGTACGT) COMPLEXED WITH ECHINOMYCIN          
REMARK 900 - SPACE GROUP P41212                                                 
DBREF  1XVR A    2     7  PDB    1XVR     1XVR             2      7             
DBREF  1XVR C  102   107  PDB    1XVR     1XVR           102    107             
DBREF  1XVR D    1     8  NOR    NOR01126 NOR01126         1      8             
DBREF  1XVR E    1     8  NOR    NOR01126 NOR01126         1      8             
SEQRES   1 A    6   DC  DG  DT  DA  DC  DG                                      
SEQRES   1 C    6   DC  DG  DT  DA  DC  DG                                      
SEQRES   1 D    8  DSN ALA N2C MVA DSN ALA NCY MVA                              
SEQRES   1 E    8  DSN ALA N2C MVA DSN ALA NCY MVA                              
HET    DSN  D   1       6                                                       
HET    N2C  D   3       8                                                       
HET    MVA  D   4       8                                                       
HET    DSN  D   5       6                                                       
HET    NCY  D   7       7                                                       
HET    MVA  D   8       8                                                       
HET    DSN  E   1       6                                                       
HET    N2C  E   3       8                                                       
HET    MVA  E   4       8                                                       
HET    DSN  E   5       6                                                       
HET    NCY  E   7       7                                                       
HET    MVA  E   8       8                                                       
HET    QUI  D   0      12                                                       
HET    QUI  D   9      12                                                       
HET    QUI  E   0      12                                                       
HET    QUI  E   9      12                                                       
HET     MG  A 201       1                                                       
HET     MG  C 211       1                                                       
HETNAM     DSN D-SERINE                                                         
HETNAM     N2C N,S-DIMETHYLCYSTEINE                                             
HETNAM     MVA N-METHYLVALINE                                                   
HETNAM     NCY N-METHYLCYSTEINE                                                 
HETNAM     QUI 2-CARBOXYQUINOXALINE                                             
HETNAM      MG MAGNESIUM ION                                                    
FORMUL   3  DSN    4(C3 H7 N O3)                                                
FORMUL   3  N2C    2(C5 H11 N O2 S)                                             
FORMUL   3  MVA    4(C6 H13 N O2)                                               
FORMUL   3  NCY    2(C4 H9 N O2 S)                                              
FORMUL   5  QUI    4(C9 H6 N2 O2)                                               
FORMUL   9   MG    2(MG 2+)                                                     
FORMUL  11  HOH   *43(H2 O)                                                     
LINK        MG    MG A 201                 O   HOH A2005     1555   1555  2.05  
LINK        MG    MG A 201                 O   HOH A2005     1555   2657  2.05  
LINK        MG    MG A 201                 O   HOH A2006     1555   1555  1.99  
LINK        MG    MG A 201                 O   HOH A2006     1555   2657  1.98  
LINK        MG    MG A 201                 O   HOH D2001     1555   1555  2.14  
LINK        MG    MG A 201                 O   HOH D2001     1555   2657  2.14  
LINK        MG    MG C 211                 O   HOH E2001     1555   1555  2.18  
LINK        MG    MG C 211                 O   HOH E2001     1555   2657  2.18  
LINK        MG    MG C 211                 O   HOH C2002     1555   1555  2.00  
LINK        MG    MG C 211                 O   HOH C2002     1555   2657  2.00  
LINK        MG    MG C 211                 O   HOH C2003     1555   1555  2.09  
LINK        MG    MG C 211                 O   HOH C2003     1555   2657  2.10  
LINK         C   QUI D   0                 N   DSN D   1     1555   1555  1.36  
LINK         C   DSN D   1                 N   ALA D   2     1555   1555  1.33  
LINK         OG  DSN D   1                 C   MVA D   8     1555   1555  1.33  
LINK         C   ALA D   2                 N   N2C D   3     1555   1555  1.34  
LINK         C   N2C D   3                 N   MVA D   4     1555   1555  1.35  
LINK         CB  N2C D   3                 SG  NCY D   7     1555   1555  1.80  
LINK         C   MVA D   4                 OG  DSN D   5     1555   1555  1.31  
LINK         C   DSN D   5                 N   ALA D   6     1555   1555  1.32  
LINK         N   DSN D   5                 C   QUI D   9     1555   1555  1.36  
LINK         C   ALA D   6                 N   NCY D   7     1555   1555  1.33  
LINK         C   NCY D   7                 N   MVA D   8     1555   1555  1.33  
LINK         C   QUI E   0                 N   DSN E   1     1555   1555  1.37  
LINK         OG  DSN E   1                 C   MVA E   8     1555   1555  1.33  
LINK         C   DSN E   1                 N   ALA E   2     1555   1555  1.33  
LINK         C   ALA E   2                 N   N2C E   3     1555   1555  1.34  
LINK         CB  N2C E   3                 SG  NCY E   7     1555   1555  1.80  
LINK         C   N2C E   3                 N   MVA E   4     1555   1555  1.34  
LINK         C   MVA E   4                 OG  DSN E   5     1555   1555  1.31  
LINK         C   DSN E   5                 N   ALA E   6     1555   1555  1.33  
LINK         N   DSN E   5                 C   QUI E   9     1555   1555  1.38  
LINK         C   ALA E   6                 N   NCY E   7     1555   1555  1.32  
LINK         C   NCY E   7                 N   MVA E   8     1555   1555  1.33  
SITE     1 AC1  3 HOH A2005  HOH A2006  HOH D2001                               
SITE     1 AC2  3 HOH C2002  HOH C2003  HOH E2001                               
SITE     1 AC3 13  DC A   2   DG A   3   DT A   4   DG A   7                    
SITE     2 AC3 13  DA C 105   DC C 106   DG C 107  HOH D2001                    
SITE     3 AC3 13 HOH D2002  HOH D2004  HOH D2005  DSN E   5                    
SITE     4 AC3 13 QUI E   9                                                     
SITE     1 AC4 14  DA A   5   DC A   6   DG A   7   DC C 102                    
SITE     2 AC4 14  DG C 103   DT C 104   DG C 107  DSN D   5                    
SITE     3 AC4 14 QUI D   9  HOH E2001  HOH E2002  HOH E2005                    
SITE     4 AC4 14 HOH E2006  HOH E2007                                          
CRYST1   29.512   62.616   34.143  90.00 114.99  90.00 C 1 2 1       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      0.033885  0.000000  0.015793        0.00000                         
SCALE2      0.000000  0.015970  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.032314        0.00000