HEADER DNA 01-AUG-95 223D TITLE DIRECT OBSERVATION OF TWO BASE-PAIRING MODES OF A CYTOSINE-THYMINE TITLE 2 ANALOGUE WITH GUANINE IN A DNA Z-FORM DUPLEX: SIGNIFICANCE FOR BASE TITLE 3 ANALOGUE MUTAGENESIS COMPND MOL_ID: 1; COMPND 2 MOLECULE: DNA (5'-D(*CP*GP*CP*GP*(C46)P*G)-3'); COMPND 3 CHAIN: A, B; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 SYNTHETIC: YES KEYWDS Z-DNA, DOUBLE HELIX, MODIFIED, DNA EXPDTA X-RAY DIFFRACTION AUTHOR M.H.MOORE,L.VAN MEERVELT,S.A.SALISBURY,P.KONG THOO LIN,D.M.BROWN REVDAT 6 03-APR-24 223D 1 REMARK REVDAT 5 14-FEB-24 223D 1 LINK REVDAT 4 04-APR-18 223D 1 REMARK REVDAT 3 24-FEB-09 223D 1 VERSN REVDAT 2 01-APR-03 223D 1 JRNL REVDAT 1 09-DEC-95 223D 0 JRNL AUTH M.H.MOORE,L.VAN MEERVELT,S.A.SALISBURY,P.K.LIN,D.M.BROWN JRNL TITL DIRECT OBSERVATION OF TWO BASE-PAIRING MODES OF A JRNL TITL 2 CYTOSINE-THYMINE ANALOGUE WITH GUANINE IN A DNA Z-FORM JRNL TITL 3 DUPLEX: SIGNIFICANCE FOR BASE ANALOGUE MUTAGENESIS. JRNL REF J.MOL.BIOL. V. 251 665 1995 JRNL REFN ISSN 0022-2836 JRNL PMID 7666418 JRNL DOI 10.1006/JMBI.1995.0463 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH L.VAN MEERVELT,M.H.MOORE,P.KONG THOO LIN,D.M.BROWN REMARK 1 TITL TO WOBBLE OR NOT TO WOBBLE: MODIFIED BASES INCORPORATED INTO REMARK 1 TITL 2 DNA REMARK 1 REF NUCLEOSIDES AND NUCLEOTIDES V. 14 1057 1995 REMARK 1 REFN ISSN 0732-8311 REMARK 2 REMARK 2 RESOLUTION. 1.70 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : NUCLSQ REMARK 3 AUTHORS : WESTHOF,DUMAS,MORAS REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.70 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 8.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 4.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 100.0 REMARK 3 NUMBER OF REFLECTIONS : 2798 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : NULL REMARK 3 R VALUE (WORKING + TEST SET) : 0.179 REMARK 3 R VALUE (WORKING SET) : NULL REMARK 3 FREE R VALUE : NULL REMARK 3 FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 FREE R VALUE TEST SET COUNT : NULL REMARK 3 REMARK 3 FIT/AGREEMENT OF MODEL WITH ALL DATA. REMARK 3 R VALUE (WORKING + TEST SET, NO CUTOFF) : NULL REMARK 3 R VALUE (WORKING SET, NO CUTOFF) : NULL REMARK 3 FREE R VALUE (NO CUTOFF) : NULL REMARK 3 FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : NULL REMARK 3 FREE R VALUE TEST SET COUNT (NO CUTOFF) : NULL REMARK 3 TOTAL NUMBER OF REFLECTIONS (NO CUTOFF) : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 0 REMARK 3 NUCLEIC ACID ATOMS : 246 REMARK 3 HETEROGEN ATOMS : 0 REMARK 3 SOLVENT ATOMS : 51 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : NULL REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : NULL REMARK 3 B22 (A**2) : NULL REMARK 3 B33 (A**2) : NULL REMARK 3 B12 (A**2) : NULL REMARK 3 B13 (A**2) : NULL REMARK 3 B23 (A**2) : NULL REMARK 3 REMARK 3 ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM SIGMAA (A) : NULL REMARK 3 LOW RESOLUTION CUTOFF (A) : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 DISTANCE RESTRAINTS. RMS SIGMA REMARK 3 SUGAR-BASE BOND DISTANCE (A) : 0.041 ; 0.025 REMARK 3 SUGAR-BASE BOND ANGLE DISTANCE (A) : 0.076 ; 0.050 REMARK 3 PHOSPHATE BONDS DISTANCE (A) : 0.071 ; 0.025 REMARK 3 PHOSPHATE BOND ANGLE, H-BOND (A) : 0.048 ; 0.025 REMARK 3 REMARK 3 PLANE RESTRAINT (A) : 0.044 ; 0.030 REMARK 3 CHIRAL-CENTER RESTRAINT (A**3) : 0.138 ; 0.100 REMARK 3 REMARK 3 NON-BONDED CONTACT RESTRAINTS. REMARK 3 SINGLE TORSION CONTACT (A) : 0.145 ; 0.063 REMARK 3 MULTIPLE TORSION CONTACT (A) : 0.278 ; 0.063 REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 SUGAR-BASE BONDS (A**2) : 4.790 ; 7.500 REMARK 3 SUGAR-BASE ANGLES (A**2) : 5.740 ; 7.500 REMARK 3 PHOSPHATE BONDS (A**2) : 10.380; 7.500 REMARK 3 PHOSPHATE BOND ANGLE, H-BOND (A**2) : 7.710 ; 7.500 REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 223D COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY NDB. REMARK 100 THE DEPOSITION ID IS D_1000177596. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : NULL REMARK 200 TEMPERATURE (KELVIN) : 292.00 REMARK 200 PH : 6.50 REMARK 200 NUMBER OF CRYSTALS USED : NULL REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : N REMARK 200 RADIATION SOURCE : ROTATING ANODE REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : RIGAKU RU200 REMARK 200 MONOCHROMATIC OR LAUE (M/L) : NULL REMARK 200 WAVELENGTH OR RANGE (A) : NULL REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : DIFFRACTOMETER REMARK 200 DETECTOR MANUFACTURER : RIGAKU AFC-5R REMARK 200 INTENSITY-INTEGRATION SOFTWARE : NULL REMARK 200 DATA SCALING SOFTWARE : NULL REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : NULL REMARK 200 RESOLUTION RANGE HIGH (A) : NULL REMARK 200 RESOLUTION RANGE LOW (A) : NULL REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : NULL REMARK 200 DATA REDUNDANCY : NULL REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : NULL REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : NULL REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : NULL REMARK 200 COMPLETENESS FOR SHELL (%) : NULL REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: MERLOT REMARK 200 STARTING MODEL: ZDF002 REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 25.44 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.65 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PH 6.50, VAPOR DIFFUSION, TEMPERATURE REMARK 280 277.00K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 21 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X+1/2,-Y,Z+1/2 REMARK 290 3555 -X,Y+1/2,-Z+1/2 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 9.11500 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 21.89000 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 15.31500 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 21.89000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 9.11500 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 15.31500 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 AUTHOR DETERMINED BIOLOGICAL UNIT: DIMERIC REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B REMARK 350 BIOMT1 1 1.000000 0.000000 0.000000 0.00000 REMARK 350 BIOMT2 1 0.000000 1.000000 0.000000 0.00000 REMARK 350 BIOMT3 1 0.000000 0.000000 1.000000 0.00000 REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS REMARK 500 REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 STANDARD TABLE: REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3) REMARK 500 REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999 REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996 REMARK 500 REMARK 500 M RES CSSEQI ATM1 RES CSSEQI ATM2 DEVIATION REMARK 500 DC A 1 O4' DC A 1 C4' -0.101 REMARK 500 DC A 1 N3 DC A 1 C4 0.065 REMARK 500 DC A 1 O3' DG A 2 P 0.073 REMARK 500 DG A 2 P DG A 2 O5' 0.100 REMARK 500 DG A 2 C4' DG A 2 C3' 0.068 REMARK 500 DG A 2 O4' DG A 2 C4' -0.095 REMARK 500 DG A 2 C2 DG A 2 N2 0.073 REMARK 500 DC A 3 C3' DC A 3 C2' 0.081 REMARK 500 DC A 3 C4 DC A 3 C5 -0.049 REMARK 500 DG A 4 P DG A 4 O5' 0.067 REMARK 500 DG A 4 O3' DG A 4 C3' -0.036 REMARK 500 DG A 4 C2 DG A 4 N3 0.067 REMARK 500 DG A 4 N9 DG A 4 C4 0.052 REMARK 500 DG A 6 P DG A 6 O5' 0.070 REMARK 500 DC B 7 C3' DC B 7 C2' 0.172 REMARK 500 DC B 7 O3' DC B 7 C3' -0.048 REMARK 500 DC B 7 C4 DC B 7 C5 0.055 REMARK 500 DC B 7 O3' DG B 8 P 0.110 REMARK 500 DG B 8 P DG B 8 OP2 -0.120 REMARK 500 DG B 8 P DG B 8 O5' 0.117 REMARK 500 DG B 8 C4' DG B 8 C3' 0.062 REMARK 500 DG B 8 C3' DG B 8 C2' -0.094 REMARK 500 DG B 8 C2' DG B 8 C1' -0.077 REMARK 500 DG B 8 O4' DG B 8 C4' -0.111 REMARK 500 DG B 8 C2 DG B 8 N3 0.068 REMARK 500 DG B 8 C6 DG B 8 N1 -0.061 REMARK 500 DG B 8 C5 DG B 8 N7 0.040 REMARK 500 DG B 8 C8 DG B 8 N9 -0.045 REMARK 500 DG B 8 N9 DG B 8 C4 0.061 REMARK 500 DC B 9 P DC B 9 O5' 0.083 REMARK 500 DC B 9 O4' DC B 9 C4' -0.084 REMARK 500 DC B 9 C2 DC B 9 N3 -0.073 REMARK 500 DG B 10 P DG B 10 O5' 0.070 REMARK 500 DG B 10 O4' DG B 10 C4' -0.086 REMARK 500 DG B 10 O3' DG B 10 C3' -0.065 REMARK 500 DG B 10 N3 DG B 10 C4 0.050 REMARK 500 DG B 10 N7 DG B 10 C8 0.043 REMARK 500 DG B 10 C6 DG B 10 O6 0.063 REMARK 500 DG B 12 O4' DG B 12 C4' -0.095 REMARK 500 DG B 12 N9 DG B 12 C4 0.055 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 DC A 1 O5' - C5' - C4' ANGL. DEV. = -11.3 DEGREES REMARK 500 DC A 1 O4' - C4' - C3' ANGL. DEV. = -5.1 DEGREES REMARK 500 DC A 1 C5' - C4' - O4' ANGL. DEV. = 18.6 DEGREES REMARK 500 DC A 1 C1' - O4' - C4' ANGL. DEV. = 8.3 DEGREES REMARK 500 DC A 1 C3' - C2' - C1' ANGL. DEV. = -7.1 DEGREES REMARK 500 DC A 1 N3 - C4 - C5 ANGL. DEV. = -3.2 DEGREES REMARK 500 DC A 1 C5 - C6 - N1 ANGL. DEV. = 3.1 DEGREES REMARK 500 DC A 1 C5 - C4 - N4 ANGL. DEV. = 6.4 DEGREES REMARK 500 DG A 2 OP1 - P - OP2 ANGL. DEV. = 9.8 DEGREES REMARK 500 DG A 2 O5' - C5' - C4' ANGL. DEV. = -9.9 DEGREES REMARK 500 DG A 2 C5' - C4' - O4' ANGL. DEV. = 6.8 DEGREES REMARK 500 DG A 2 O4' - C1' - C2' ANGL. DEV. = 4.5 DEGREES REMARK 500 DG A 2 C6 - N1 - C2 ANGL. DEV. = -4.7 DEGREES REMARK 500 DG A 2 N1 - C2 - N3 ANGL. DEV. = 4.6 DEGREES REMARK 500 DG A 2 C2 - N3 - C4 ANGL. DEV. = -3.1 DEGREES REMARK 500 DG A 2 N3 - C4 - C5 ANGL. DEV. = 3.2 DEGREES REMARK 500 DG A 2 C4 - C5 - C6 ANGL. DEV. = -5.1 DEGREES REMARK 500 DG A 2 C5 - C6 - N1 ANGL. DEV. = 4.8 DEGREES REMARK 500 DG A 2 C4 - C5 - N7 ANGL. DEV. = 2.6 DEGREES REMARK 500 DG A 2 N1 - C2 - N2 ANGL. DEV. = -12.6 DEGREES REMARK 500 DG A 2 N3 - C2 - N2 ANGL. DEV. = 7.6 DEGREES REMARK 500 DG A 2 C5 - C6 - O6 ANGL. DEV. = -5.5 DEGREES REMARK 500 DC A 3 O4' - C4' - C3' ANGL. DEV. = -6.6 DEGREES REMARK 500 DC A 3 C5' - C4' - O4' ANGL. DEV. = 18.2 DEGREES REMARK 500 DC A 3 C1' - O4' - C4' ANGL. DEV. = 9.0 DEGREES REMARK 500 DC A 3 C3' - C2' - C1' ANGL. DEV. = -6.6 DEGREES REMARK 500 DC A 3 N1 - C2 - N3 ANGL. DEV. = -4.6 DEGREES REMARK 500 DG A 4 O5' - C5' - C4' ANGL. DEV. = -10.8 DEGREES REMARK 500 DG A 4 O4' - C4' - C3' ANGL. DEV. = 5.2 DEGREES REMARK 500 DG A 4 C1' - O4' - C4' ANGL. DEV. = -9.1 DEGREES REMARK 500 DG A 4 O4' - C1' - C2' ANGL. DEV. = 4.3 DEGREES REMARK 500 DG A 4 O4' - C1' - N9 ANGL. DEV. = -6.1 DEGREES REMARK 500 DG A 4 C6 - N1 - C2 ANGL. DEV. = -4.5 DEGREES REMARK 500 DG A 4 C5 - C6 - N1 ANGL. DEV. = 4.3 DEGREES REMARK 500 DG A 4 C3' - O3' - P ANGL. DEV. = 18.0 DEGREES REMARK 500 DG A 6 C3' - C2' - C1' ANGL. DEV. = -4.9 DEGREES REMARK 500 DG A 6 C5 - C6 - N1 ANGL. DEV. = 3.6 DEGREES REMARK 500 DG A 6 N7 - C8 - N9 ANGL. DEV. = 3.4 DEGREES REMARK 500 DG A 6 C8 - N9 - C4 ANGL. DEV. = -2.7 DEGREES REMARK 500 DG A 6 N3 - C2 - N2 ANGL. DEV. = -5.2 DEGREES REMARK 500 DG A 6 C5 - C6 - O6 ANGL. DEV. = -5.0 DEGREES REMARK 500 DC B 7 O4' - C4' - C3' ANGL. DEV. = -8.4 DEGREES REMARK 500 DC B 7 C5' - C4' - C3' ANGL. DEV. = -11.0 DEGREES REMARK 500 DC B 7 C5' - C4' - O4' ANGL. DEV. = 18.3 DEGREES REMARK 500 DC B 7 C1' - O4' - C4' ANGL. DEV. = 13.8 DEGREES REMARK 500 DC B 7 C4' - C3' - O3' ANGL. DEV. = 14.3 DEGREES REMARK 500 DC B 7 C4' - C3' - C2' ANGL. DEV. = -5.8 DEGREES REMARK 500 DC B 7 O4' - C1' - C2' ANGL. DEV. = -10.6 DEGREES REMARK 500 DC B 7 O4' - C1' - N1 ANGL. DEV. = 2.6 DEGREES REMARK 500 DC B 7 C4 - C5 - C6 ANGL. DEV. = -4.9 DEGREES REMARK 500 REMARK 500 THIS ENTRY HAS 98 ANGLE DEVIATIONS. REMARK 500 REMARK 500 REMARK: NULL DBREF 223D A 1 6 PDB 223D 223D 1 6 DBREF 223D B 7 12 PDB 223D 223D 7 12 SEQRES 1 A 6 DC DG DC DG C46 DG SEQRES 1 B 6 DC DG DC DG C46 DG MODRES 223D C46 A 5 DC MODRES 223D C46 B 11 DC HET C46 A 5 22 HET C46 B 11 22 HETNAM C46 6H,8H-3,4-DIHYDROPYRIMIDO[4,5-C][1,2]OXAZIN-7- HETNAM 2 C46 0NE(CYTIDINE)-5'-MONOPHOSPHATE FORMUL 1 C46 2(C11 H16 N3 O8 P) FORMUL 3 HOH *51(H2 O) LINK O3' DG A 4 P C46 A 5 1555 1555 1.58 LINK O3' C46 A 5 P DG A 6 1555 1555 1.59 LINK O3' DG B 10 P C46 B 11 1555 1555 1.60 LINK O3' C46 B 11 P DG B 12 1555 1555 1.58 CRYST1 18.230 30.630 43.780 90.00 90.00 90.00 P 21 21 21 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 0.054855 0.000000 0.000000 0.00000 SCALE2 0.000000 0.032648 0.000000 0.00000 SCALE3 0.000000 0.000000 0.022841 0.00000