HEADER    DNA/ANTIBIOTIC                          26-MAY-03   1PFE              
TITLE     ECHINOMYCIN-(GCGTACGC)2 COMPLEX                                       
COMPND    MOL_ID: 1;                                                            
COMPND   2 MOLECULE: 5'-D(*GP*CP*GP*TP*AP*CP*GP*C)-3';                          
COMPND   3 CHAIN: A;                                                            
COMPND   4 ENGINEERED: YES;                                                     
COMPND   5 MOL_ID: 2;                                                           
COMPND   6 MOLECULE: ECHINOMYCIN;                                               
COMPND   7 CHAIN: B;                                                            
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                                                      
REVDAT   6   03-APR-24 1PFE    1       REMARK SEQADV LINK                       
REVDAT   5   27-JUL-11 1PFE    1       REMARK                                   
REVDAT   4   13-JUL-11 1PFE    1       VERSN                                    
REVDAT   3   24-FEB-09 1PFE    1       VERSN                                    
REVDAT   2   05-APR-05 1PFE    1       JRNL                                     
REVDAT   1   08-JUN-04 1PFE    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.    1.10 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) : 1.10                           
REMARK   3   RESOLUTION RANGE LOW  (ANGSTROMS) : 21.00                          
REMARK   3   DATA CUTOFF            (SIGMA(F)) : 0.000                          
REMARK   3   COMPLETENESS FOR RANGE        (%) : 97.2                           
REMARK   3   CROSS-VALIDATION METHOD           : FREE R                         
REMARK   3   FREE R VALUE TEST SET SELECTION   : THIN SHELLS                    
REMARK   3                                                                      
REMARK   3  FIT TO DATA USED IN REFINEMENT (NO CUTOFF).                         
REMARK   3   R VALUE   (WORKING + TEST SET, NO CUTOFF) : 0.146                  
REMARK   3   R VALUE          (WORKING SET, NO CUTOFF) : 0.146                  
REMARK   3   FREE R VALUE                  (NO CUTOFF) : 0.168                  
REMARK   3   FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : 3.000                  
REMARK   3   FREE R VALUE TEST SET COUNT   (NO CUTOFF) : 478                    
REMARK   3   TOTAL NUMBER OF REFLECTIONS   (NO CUTOFF) : 15164                  
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)) : 0.138                  
REMARK   3   FREE R VALUE                  (F>4SIG(F)) : 0.160                  
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      : 66                                            
REMARK   3   NUCLEIC ACID ATOMS : 161                                           
REMARK   3   HETEROGEN ATOMS    : 25                                            
REMARK   3   SOLVENT ATOMS      : 80                                            
REMARK   3                                                                      
REMARK   3  MODEL REFINEMENT.                                                   
REMARK   3   OCCUPANCY SUM OF NON-HYDROGEN ATOMS      : 303.00                  
REMARK   3   OCCUPANCY SUM OF HYDROGEN ATOMS          : 149.00                  
REMARK   3   NUMBER OF DISCRETELY DISORDERED RESIDUES : 7                       
REMARK   3   NUMBER OF LEAST-SQUARES PARAMETERS       : 2979                    
REMARK   3   NUMBER OF RESTRAINTS                     : 2074                    
REMARK   3                                                                      
REMARK   3  RMS DEVIATIONS FROM RESTRAINT TARGET VALUES.                        
REMARK   3   BOND LENGTHS                         (A) : 0.022                   
REMARK   3   ANGLE DISTANCES                      (A) : 0.036                   
REMARK   3   SIMILAR DISTANCES (NO TARGET VALUES) (A) : NULL                    
REMARK   3   DISTANCES FROM RESTRAINT PLANES      (A) : 0.172                   
REMARK   3   ZERO CHIRAL VOLUMES               (A**3) : 0.068                   
REMARK   3   NON-ZERO CHIRAL VOLUMES           (A**3) : 0.059                   
REMARK   3   ANTI-BUMPING DISTANCE RESTRAINTS     (A) : 0.041                   
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 : STANDARD SHELX FOR THE DNA, ENGH    
REMARK   3                                  & HUBER FOR THE STANDARD PROTEIN    
REMARK   3                                  PARTS OF ECHINOMYCIN, BUILT FROM    
REMARK   3                                  THE CSD FOR THE REST                
REMARK   3   SPECIAL CASE: TARGETS FOR ECHINOMYCIN BUILT FROM THE CSD           
REMARK   3                                                                      
REMARK   3  OTHER REFINEMENT REMARKS: THE SKELETON OF ECHINOMYCIN IS NEARLY     
REMARK   3  SYMMETRIC (NOT MODELLED TO DO SO), THE BRIDGE IS NOT. BOTH          
REMARK   3  POSSIBLE ORIENTATIONS OF BINDING WERE OBSERVED, BUT SKELETON        
REMARK   3  POSITIONS NEARLY OVERLAP, SO ONLY THE BRIDGE WAS MODELLED AS        
REMARK   3  DISORDERED/MICROHETEROGENEITY.                                      
REMARK   4                                                                      
REMARK   4 1PFE COMPLIES WITH FORMAT V. 3.30, 13-JUL-11                         
REMARK 100                                                                      
REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 27-MAY-03.                  
REMARK 100 THE DEPOSITION ID IS D_1000019291.                                   
REMARK 200                                                                      
REMARK 200 EXPERIMENTAL DETAILS                                                 
REMARK 200  EXPERIMENT TYPE                : X-RAY DIFFRACTION                  
REMARK 200  DATE OF DATA COLLECTION        : 19-NOV-02                          
REMARK 200  TEMPERATURE           (KELVIN) : 100                                
REMARK 200  PH                             : 4.5                                
REMARK 200  NUMBER OF CRYSTALS USED        : 1                                  
REMARK 200                                                                      
REMARK 200  SYNCHROTRON              (Y/N) : Y                                  
REMARK 200  RADIATION SOURCE               : EMBL/DESY, HAMBURG                 
REMARK 200  BEAMLINE                       : X11                                
REMARK 200  X-RAY GENERATOR MODEL          : NULL                               
REMARK 200  MONOCHROMATIC OR LAUE    (M/L) : M                                  
REMARK 200  WAVELENGTH OR RANGE        (A) : 0.8162                             
REMARK 200  MONOCHROMATOR                  : TRIANGULAR MONOCHROMATOR           
REMARK 200  OPTICS                         : NULL                               
REMARK 200                                                                      
REMARK 200  DETECTOR TYPE                  : CCD                                
REMARK 200  DETECTOR MANUFACTURER          : MARRESEARCH                        
REMARK 200  INTENSITY-INTEGRATION SOFTWARE : DENZO                              
REMARK 200  DATA SCALING SOFTWARE          : SCALEPACK                          
REMARK 200                                                                      
REMARK 200  NUMBER OF UNIQUE REFLECTIONS   : 15164                              
REMARK 200  RESOLUTION RANGE HIGH      (A) : 1.100                              
REMARK 200  RESOLUTION RANGE LOW       (A) : 21.000                             
REMARK 200  REJECTION CRITERIA  (SIGMA(I)) : 0.000                              
REMARK 200                                                                      
REMARK 200 OVERALL.                                                             
REMARK 200  COMPLETENESS FOR RANGE     (%) : 97.2                               
REMARK 200  DATA REDUNDANCY                : 14.91                              
REMARK 200  R MERGE                    (I) : 0.04900                            
REMARK 200  R SYM                      (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR THE DATA SET  : 30.0100                            
REMARK 200                                                                      
REMARK 200 IN THE HIGHEST RESOLUTION SHELL.                                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.10                     
REMARK 200  HIGHEST RESOLUTION SHELL, RANGE LOW  (A) : 1.20                     
REMARK 200  COMPLETENESS FOR SHELL     (%) : 95.7                               
REMARK 200  DATA REDUNDANCY IN SHELL       : 13.05                              
REMARK 200  R MERGE FOR SHELL          (I) : 0.24200                            
REMARK 200  R SYM FOR SHELL            (I) : NULL                               
REMARK 200  <I/SIGMA(I)> FOR SHELL         : 11.48                              
REMARK 200                                                                      
REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH                              
REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT        
REMARK 200 SOFTWARE USED: EPMR                                                  
REMARK 200 STARTING MODEL: TROSTIN A - (GCGTACGC)2 COMPLEX                      
REMARK 200                                                                      
REMARK 200 REMARK: NULL                                                         
REMARK 280                                                                      
REMARK 280 CRYSTAL                                                              
REMARK 280 SOLVENT CONTENT, VS   (%): 64.98                                     
REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.51                     
REMARK 280                                                                      
REMARK 280 CRYSTALLIZATION CONDITIONS: LI2SO4, MGCL2, METHANOL, NAAC,           
REMARK 280  SPERMINE, PH 4.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 293K   
REMARK 290                                                                      
REMARK 290 CRYSTALLOGRAPHIC SYMMETRY                                            
REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 63 2 2                         
REMARK 290                                                                      
REMARK 290      SYMOP   SYMMETRY                                                
REMARK 290     NNNMMM   OPERATOR                                                
REMARK 290       1555   X,Y,Z                                                   
REMARK 290       2555   -Y,X-Y,Z                                                
REMARK 290       3555   -X+Y,-X,Z                                               
REMARK 290       4555   -X,-Y,Z+1/2                                             
REMARK 290       5555   Y,-X+Y,Z+1/2                                            
REMARK 290       6555   X-Y,X,Z+1/2                                             
REMARK 290       7555   Y,X,-Z                                                  
REMARK 290       8555   X-Y,-Y,-Z                                               
REMARK 290       9555   -X,-X+Y,-Z                                              
REMARK 290      10555   -Y,-X,-Z+1/2                                            
REMARK 290      11555   -X+Y,Y,-Z+1/2                                           
REMARK 290      12555   X,X-Y,-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 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   2  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   2  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   3 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   3 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   3  0.000000  0.000000  1.000000        0.00000            
REMARK 290   SMTRY1   4 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   4  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   4  0.000000  0.000000  1.000000       39.86700            
REMARK 290   SMTRY1   5  0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   5 -0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   5  0.000000  0.000000  1.000000       39.86700            
REMARK 290   SMTRY1   6  0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   6  0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   6  0.000000  0.000000  1.000000       39.86700            
REMARK 290   SMTRY1   7 -0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   7  0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   7  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   8  1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2   8  0.000000 -1.000000  0.000000        0.00000            
REMARK 290   SMTRY3   8  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1   9 -0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2   9 -0.866025  0.500000  0.000000        0.00000            
REMARK 290   SMTRY3   9  0.000000  0.000000 -1.000000        0.00000            
REMARK 290   SMTRY1  10  0.500000 -0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  10 -0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3  10  0.000000  0.000000 -1.000000       39.86700            
REMARK 290   SMTRY1  11 -1.000000  0.000000  0.000000        0.00000            
REMARK 290   SMTRY2  11  0.000000  1.000000  0.000000        0.00000            
REMARK 290   SMTRY3  11  0.000000  0.000000 -1.000000       39.86700            
REMARK 290   SMTRY1  12  0.500000  0.866025  0.000000        0.00000            
REMARK 290   SMTRY2  12  0.866025 -0.500000  0.000000        0.00000            
REMARK 290   SMTRY3  12  0.000000  0.000000 -1.000000       39.86700            
REMARK 290                                                                      
REMARK 290 REMARK: NULL                                                         
REMARK 300                                                                      
REMARK 300 BIOMOLECULE: 1                                                       
REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM                
REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN                  
REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON               
REMARK 300 BURIED SURFACE AREA.                                                 
REMARK 300 REMARK: THE SECOND PART OF THE BIOLOGICAL ASSEMBLY IS GENERATED BY:  
REMARK 300 -X, -X+Y, -Z                                                         
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: 730 ANGSTROM**2                           
REMARK 350 SURFACE AREA OF THE COMPLEX: 3960 ANGSTROM**2                        
REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -6.4 KCAL/MOL                         
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 350   BIOMT1   2 -0.500000 -0.866025  0.000000        0.00000            
REMARK 350   BIOMT2   2 -0.866025  0.500000  0.000000        0.00000            
REMARK 350   BIOMT3   2  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 A2002  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A2013  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A2019  LIES ON A SPECIAL POSITION.                          
REMARK 375      HOH A2024  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  HERE, ECHINOMYCIN IS REPRESENTED BY GROUPING TOGETHER THE           
REMARK 400  SEQUENCE (SEQRES) AND TWO LIGANDS (HET) QUI.                        
REMARK 400                                                                      
REMARK 400 THE ECHINOMYCIN IS CYCLIC DEPSIPEPTIDE, A MEMBER OF ANTIBIOTIC       
REMARK 400 CLASS.                                                               
REMARK 400                                                                      
REMARK 400  GROUP: 1                                                            
REMARK 400   NAME: ECHINOMYCIN                                                  
REMARK 400   CHAIN: B                                                           
REMARK 400   COMPONENT_1: PEPTIDE LIKE POLYMER                                  
REMARK 400   COMPONENT_2: RESIDUE QUI, 2 COPIES                                 
REMARK 400   DESCRIPTION: ECHINOMYCIN IS A BICYCLIC OCTADEPSIPEPTIDE.           
REMARK 400                BICYCLIZATION IS ACHIEVED BY LINKING THE N- AND THE   
REMARK 400                C- TERMINI, AND A THIOACETAL BOND BETWEEN RESIDUES 3  
REMARK 400                AND 7. THE TWO QUINOXALINE CHROMOPHORES ARE LINKED    
REMARK 400                TO THE D-SERINE RESIDUES, RESIDUES 1 AND 5.           
REMARK 470                                                                      
REMARK 470 MISSING ATOM                                                         
REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER;           
REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER;          
REMARK 470 I=INSERTION CODE):                                                   
REMARK 470   M RES CSSEQI  ATOMS                                                
REMARK 470     N2C B   3    CD                                                  
REMARK 470     NCY B   7   CD                                                   
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     DG A   1   C2'    DG A   1   C1'    -0.077                       
REMARK 500     DG A   1   O4'    DG A   1   C1'     0.111                       
REMARK 500     DC A   2   O4'    DC A   2   C1'     0.086                       
REMARK 500     DG A   3   C2'    DG A   3   C1'     0.078                       
REMARK 500     DG A   3   O4'    DG A   3   C1'    -0.086                       
REMARK 500     DT A   4   O4'    DT A   4   C1'     0.079                       
REMARK 500     DG A   7   C2'    DG A   7   C1'     0.076                       
REMARK 500     DG A   7   O4'    DG A   7   C1'    -0.079                       
REMARK 500     DC A   8   O4'    DC A   8   C1'     0.085                       
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     DG A   1   O4' -  C1' -  N9  ANGL. DEV. =  -8.7 DEGREES          
REMARK 500     DC A   2   C5' -  C4' -  O4' ANGL. DEV. =   9.4 DEGREES          
REMARK 500     DC A   2   O4' -  C1' -  N1  ANGL. DEV. =  -5.5 DEGREES          
REMARK 500     DG A   3   O4' -  C1' -  N9  ANGL. DEV. =   6.9 DEGREES          
REMARK 500     DT A   4   O4' -  C1' -  N1  ANGL. DEV. =  -6.3 DEGREES          
REMARK 500     DA A   5   C1' -  O4' -  C4' ANGL. DEV. =  -6.7 DEGREES          
REMARK 500     DC A   6   O4' -  C1' -  N1  ANGL. DEV. =  -5.7 DEGREES          
REMARK 500     DG A   7   O4' -  C1' -  N9  ANGL. DEV. =   6.2 DEGREES          
REMARK 500     DC A   8   O4' -  C1' -  N1  ANGL. DEV. =  -5.2 DEGREES          
REMARK 500     DC A   8   N3  -  C4  -  C5  ANGL. DEV. =  -3.3 DEGREES          
REMARK 500     DC A   8   N1  -  C2  -  O2  ANGL. DEV. =   4.8 DEGREES          
REMARK 500                                                                      
REMARK 500 REMARK: NULL                                                         
REMARK 800                                                                      
REMARK 800 SITE                                                                 
REMARK 800 SITE_IDENTIFIER: AC1                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CL A 20                   
REMARK 800                                                                      
REMARK 800 SITE_IDENTIFIER: AC2                                                 
REMARK 800 EVIDENCE_CODE: SOFTWARE                                              
REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR CHAIN B 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 UK-6305  
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 - SPACE  
REMARK 900 GROUP P632                                                           
REMARK 900 RELATED ID: 1XVN   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF D(ACGTACGT) COMPLEXED WITH ECHINOMYCIN - SPACE  
REMARK 900 GROUP P632                                                           
REMARK 900 RELATED ID: 1XVR   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF D(CGTACG) COMPLEXED WITH ECHINOMYCIN - SPACE    
REMARK 900 GROUP C21                                                            
REMARK 900 RELATED ID: 2ADW   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF D(ACGTACGT) COMPLEXED WITH ECHINOMYCIN - SPACE  
REMARK 900 GROUP P42212                                                         
REMARK 900 RELATED ID: 2DA8   RELATED DB: PDB                                   
REMARK 900 SOLUTION STRUCTURE OF D(GATATC) COMPLEXED WITH A MODIFIED TRIOSTIN   
REMARK 900 A AT POSITIONS 4 AND 8                                               
REMARK 900 RELATED ID: 3GO3   RELATED DB: PDB                                   
REMARK 900 CRYSTAL STRUCTURE OF D(ACGTACGT) COMPLEXED WITH ECHINOMYCIN - SPACE  
REMARK 900 GROUP P41212                                                         
DBREF  1PFE A    1     8  PDB    1PFE     1PFE             1      8             
DBREF  1PFE B    1     8  NOR    NOR01126 NOR01126         1      8             
SEQADV 1PFE N2C B    3  NOR  NOR01126  NCY     3 MICROHETEROGENEITY             
SEQADV 1PFE NCY B    7  NOR  NOR01126  N2C     7 MICROHETEROGENEITY             
SEQRES   1 A    8   DG  DC  DG  DT  DA  DC  DG  DC                              
SEQRES   1 B    8  DSN ALA N2C MVA DSN ALA NCY MVA                              
HET    DSN  B   1       6                                                       
HET    N2C  B   3       7                                                       
HET    NCY  B   3       7                                                       
HET    MVA  B   4       8                                                       
HET    DSN  B   5       6                                                       
HET    NCY  B   7       7                                                       
HET    N2C  B   7       7                                                       
HET    MVA  B   8       8                                                       
HET     CL  A  20       1                                                       
HET    QUI  B   0      12                                                       
HET    QUI  B   9      12                                                       
HETNAM     DSN D-SERINE                                                         
HETNAM     N2C N,S-DIMETHYLCYSTEINE                                             
HETNAM     NCY N-METHYLCYSTEINE                                                 
HETNAM     MVA N-METHYLVALINE                                                   
HETNAM      CL CHLORIDE ION                                                     
HETNAM     QUI 2-CARBOXYQUINOXALINE                                             
FORMUL   2  DSN    2(C3 H7 N O3)                                                
FORMUL   2  N2C    2(C5 H11 N O2 S)                                             
FORMUL   2  NCY    2(C4 H9 N O2 S)                                              
FORMUL   2  MVA    2(C6 H13 N O2)                                               
FORMUL   3   CL    CL 1-                                                        
FORMUL   4  QUI    2(C9 H6 N2 O2)                                               
FORMUL   6  HOH   *80(H2 O)                                                     
LINK         C   QUI B   0                 N   DSN B   1     1555   1555  1.35  
LINK         C   DSN B   1                 N   ALA B   2     1555   1555  1.35  
LINK         OG  DSN B   1                 C   MVA B   8     1555   1555  1.33  
LINK         C   ALA B   2                 N  AN2C B   3     1555   1555  1.36  
LINK         C   ALA B   2                 N  BNCY B   3     1555   1555  1.36  
LINK         C  BNCY B   3                 N   MVA B   4     1555   1555  1.34  
LINK         C  AN2C B   3                 N   MVA B   4     1555   1555  1.34  
LINK         CB AN2C B   3                 SG ANCY B   7     1555   1555  1.80  
LINK         SG BNCY B   3                 CB BN2C B   7     1555   1555  1.81  
LINK         C   MVA B   4                 OG  DSN B   5     1555   1555  1.33  
LINK         C   DSN B   5                 N   ALA B   6     1555   1555  1.32  
LINK         N   DSN B   5                 C   QUI B   9     1555   1555  1.37  
LINK         C   ALA B   6                 N  ANCY B   7     1555   1555  1.35  
LINK         C   ALA B   6                 N  BN2C B   7     1555   1555  1.35  
LINK         C  ANCY B   7                 N   MVA B   8     1555   1555  1.32  
LINK         C  BN2C B   7                 N   MVA B   8     1555   1555  1.32  
SITE     1 AC1  1 HOH A2069                                                     
SITE     1 AC2 16  DG A   1   DC A   2   DG A   3   DT A   4                    
SITE     2 AC2 16  DA A   5   DC A   6   DG A   7   DC A   8                    
SITE     3 AC2 16 HOH B2001  HOH B2002  HOH B2003  HOH B2005                    
SITE     4 AC2 16 HOH B2006  HOH B2007  HOH B2009  HOH B2010                    
CRYST1   39.374   39.374   79.734  90.00  90.00 120.00 P 63 2 2     12          
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      0.025397  0.014663  0.000000        0.00000                         
SCALE2      0.000000  0.029326  0.000000        0.00000                         
SCALE3      0.000000  0.000000  0.012542        0.00000