HEADER RNA 11-MAY-25 9OL1 TITLE 16MER SELF-COMPLEMENTARY DUPLEX RNA WITH DI:S(2)C PAIR SEQUENCE 2 COMPND MOL_ID: 1; COMPND 2 MOLECULE: DNA/RNA (5'-R(*AP*GP*AP*GP*AP*A)-D(P*I)-R(P*AP*UP*(RSP) COMPND 3 P*UP*UP*CP*UP*CP*U)-3'); COMPND 4 CHAIN: A; COMPND 5 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 SYNTHETIC: YES; SOURCE 3 ORGANISM_SCIENTIFIC: SYNTHETIC CONSTRUCT; SOURCE 4 ORGANISM_TAXID: 32630 KEYWDS DEOXYRIBO-PURINE, 2-THIOCYTIDINE, DEOXYINOSINE, RNA DUPLEX, ORIGIN OF KEYWDS 2 LIFE, RNA EXPDTA X-RAY DIFFRACTION AUTHOR Z.FANG,J.W.SZOSTAK REVDAT 2 26-NOV-25 9OL1 1 JRNL REVDAT 1 22-OCT-25 9OL1 0 JRNL AUTH Z.FANG,O.ACIKGOZ,X.JIA,J.ESSEX,R.WEN,J.W.SZOSTAK JRNL TITL IMPACT OF 2'-DEOXYRIBO-PURINE SUBSTRATES ON NONENZYMATIC RNA JRNL TITL 2 TEMPLATE-DIRECTED PRIMER EXTENSION. JRNL REF NUCLEIC ACIDS RES. V. 53 2025 JRNL REFN ESSN 1362-4962 JRNL PMID 41261857 JRNL DOI 10.1093/NAR/GKAF1228 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH Z.FANG,O.ACIKGOZ,X.JIA,J.ESSEX,R.WEN,J.W.SZOSTAK REMARK 1 TITL IMPACT OF 2'-DEOXYRIBO-PURINE SUBSTRATES ON NONENZYMATIC RNA REMARK 1 TITL 2 TEMPLATE-DIRECTED PRIMER EXTENSION. REMARK 1 REF BIORXIV 2025 REMARK 1 REFN ISSN 2692-8205 REMARK 1 PMID 40909494 REMARK 1 DOI 10.1101/2025.08.29.673048 REMARK 2 REMARK 2 RESOLUTION. 1.24 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.8.0425 REMARK 3 AUTHORS : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER, REMARK 3 : NICHOLLS,WINN,LONG,VAGIN REMARK 3 REMARK 3 REFINEMENT TARGET : NULL REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.24 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 34.08 REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 COMPLETENESS FOR RANGE (%) : 100.0 REMARK 3 NUMBER OF REFLECTIONS : 11724 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : THROUGHOUT REMARK 3 FREE R VALUE TEST SET SELECTION : NULL REMARK 3 R VALUE (WORKING + TEST SET) : NULL REMARK 3 R VALUE (WORKING SET) : 0.186 REMARK 3 FREE R VALUE : 0.229 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 10.005 REMARK 3 FREE R VALUE TEST SET COUNT : 1173 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 20 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 1.24 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.28 REMARK 3 REFLECTION IN BIN (WORKING SET) : 763 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 100.0 REMARK 3 BIN R VALUE (WORKING SET) : 0.3130 REMARK 3 BIN FREE R VALUE SET COUNT : 85 REMARK 3 BIN FREE R VALUE : 0.2920 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 0 REMARK 3 NUCLEIC ACID ATOMS : 334 REMARK 3 HETEROGEN ATOMS : 1 REMARK 3 SOLVENT ATOMS : 80 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 12.62 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 0.00200 REMARK 3 B22 (A**2) : 0.00200 REMARK 3 B33 (A**2) : -0.00700 REMARK 3 B12 (A**2) : 0.00100 REMARK 3 B13 (A**2) : 0.00000 REMARK 3 B23 (A**2) : 0.00000 REMARK 3 REMARK 3 ESTIMATED OVERALL COORDINATE ERROR. REMARK 3 ESU BASED ON R VALUE (A): 0.052 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.058 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.040 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 0.949 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.975 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.959 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 373 ; 0.012 ; 0.011 REMARK 3 BOND LENGTHS OTHERS (A): 155 ; 0.002 ; 0.019 REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 578 ; 2.079 ; 1.968 REMARK 3 BOND ANGLES OTHERS (DEGREES): 380 ; 0.768 ; 1.820 REMARK 3 TORSION ANGLES, PERIOD 1 (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 2 (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 3 (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 4 (DEGREES): NULL ; NULL ; NULL REMARK 3 CHIRAL-CENTER RESTRAINTS (A**3): 78 ; 0.076 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 180 ; 0.029 ; 0.020 REMARK 3 GENERAL PLANES OTHERS (A): 58 ; 0.001 ; 0.020 REMARK 3 NON-BONDED CONTACTS REFINED ATOMS (A): 31 ; 0.086 ; 0.200 REMARK 3 NON-BONDED CONTACTS OTHERS (A): 73 ; 0.147 ; 0.200 REMARK 3 NON-BONDED TORSION REFINED ATOMS (A): 142 ; 0.239 ; 0.200 REMARK 3 NON-BONDED TORSION OTHERS (A): NULL ; NULL ; NULL REMARK 3 H-BOND (X...Y) REFINED ATOMS (A): 75 ; 0.294 ; 0.200 REMARK 3 H-BOND (X...Y) OTHERS (A): NULL ; NULL ; NULL REMARK 3 POTENTIAL METAL-ION REFINED ATOMS (A): 6 ; 0.199 ; 0.200 REMARK 3 POTENTIAL METAL-ION OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY VDW REFINED ATOMS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY VDW OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY H-BOND REFINED ATOMS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY H-BOND OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY METAL-ION REFINED ATOMS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY METAL-ION OTHERS (A): NULL ; NULL ; NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. COUNT RMS WEIGHT REMARK 3 MAIN-CHAIN BOND REFINED ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 MAIN-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE REFINED ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN BOND REFINED ATOMS (A**2): 373 ; 1.256 ; 1.468 REMARK 3 SIDE-CHAIN BOND OTHER ATOMS (A**2): 374 ; 1.254 ; 1.467 REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): 578 ; 1.802 ; 2.684 REMARK 3 SIDE-CHAIN ANGLE OTHER ATOMS (A**2): 579 ; 1.801 ; 2.683 REMARK 3 LONG RANGE B REFINED ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 LONG RANGE B OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 REMARK 3 ANISOTROPIC THERMAL FACTOR RESTRAINTS. COUNT RMS WEIGHT REMARK 3 RIGID-BOND RESTRAINTS (A**2): NULL ; NULL ; NULL REMARK 3 SPHERICITY; FREE ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SPHERICITY; BONDED ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 REMARK 3 NCS RESTRAINTS STATISTICS REMARK 3 NUMBER OF DIFFERENT NCS GROUPS : NULL REMARK 3 REMARK 3 TLS DETAILS REMARK 3 NUMBER OF TLS GROUPS : NULL REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : MASK BULK SOLVENT REMARK 3 PARAMETERS FOR MASK CALCULATION REMARK 3 VDW PROBE RADIUS : 1.20 REMARK 3 ION PROBE RADIUS : 0.80 REMARK 3 SHRINKAGE RADIUS : 0.80 REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN ADDED IN THEIR REMARK 3 RIDING POSITIONS REMARK 4 REMARK 4 9OL1 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 13-MAY-25. REMARK 100 THE DEPOSITION ID IS D_1000295004. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 04-MAR-25 REMARK 200 TEMPERATURE (KELVIN) : 99 REMARK 200 PH : 7.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : NSLS-II REMARK 200 BEAMLINE : 17-ID-2 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.97933 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : PIXEL REMARK 200 DETECTOR MANUFACTURER : DECTRIS EIGER X 16M REMARK 200 INTENSITY-INTEGRATION SOFTWARE : XDS REMARK 200 DATA SCALING SOFTWARE : AIMLESS REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 11727 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.243 REMARK 200 RESOLUTION RANGE LOW (A) : 34.077 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 100.0 REMARK 200 DATA REDUNDANCY : 17.60 REMARK 200 R MERGE (I) : 0.12800 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 12.5000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.24 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.27 REMARK 200 COMPLETENESS FOR SHELL (%) : 100.0 REMARK 200 DATA REDUNDANCY IN SHELL : 14.70 REMARK 200 R MERGE FOR SHELL (I) : 2.00000 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : 2.000 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: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 37.82 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.98 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 0.2 M CALCIUM CHLORIDE DIHYDRATE, 0.05 REMARK 280 M HEPES SODIUM PH 7.5, 28% V/V POLYETHYLENE GLYCOL 400, 0.002 M REMARK 280 SPERMINE, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 293K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: H 3 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 Y,X,-Z REMARK 290 5555 X-Y,-Y,-Z REMARK 290 6555 -X,-X+Y,-Z REMARK 290 7555 X+2/3,Y+1/3,Z+1/3 REMARK 290 8555 -Y+2/3,X-Y+1/3,Z+1/3 REMARK 290 9555 -X+Y+2/3,-X+1/3,Z+1/3 REMARK 290 10555 Y+2/3,X+1/3,-Z+1/3 REMARK 290 11555 X-Y+2/3,-Y+1/3,-Z+1/3 REMARK 290 12555 -X+2/3,-X+Y+1/3,-Z+1/3 REMARK 290 13555 X+1/3,Y+2/3,Z+2/3 REMARK 290 14555 -Y+1/3,X-Y+2/3,Z+2/3 REMARK 290 15555 -X+Y+1/3,-X+2/3,Z+2/3 REMARK 290 16555 Y+1/3,X+2/3,-Z+2/3 REMARK 290 17555 X-Y+1/3,-Y+2/3,-Z+2/3 REMARK 290 18555 -X+1/3,-X+Y+2/3,-Z+2/3 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 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 4 0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 4 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 5 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 5 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 5 0.000000 0.000000 -1.000000 0.00000 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 0.00000 REMARK 290 SMTRY1 7 1.000000 0.000000 0.000000 20.44900 REMARK 290 SMTRY2 7 0.000000 1.000000 0.000000 11.80624 REMARK 290 SMTRY3 7 0.000000 0.000000 1.000000 41.65967 REMARK 290 SMTRY1 8 -0.500000 -0.866025 0.000000 20.44900 REMARK 290 SMTRY2 8 0.866025 -0.500000 0.000000 11.80624 REMARK 290 SMTRY3 8 0.000000 0.000000 1.000000 41.65967 REMARK 290 SMTRY1 9 -0.500000 0.866025 0.000000 20.44900 REMARK 290 SMTRY2 9 -0.866025 -0.500000 0.000000 11.80624 REMARK 290 SMTRY3 9 0.000000 0.000000 1.000000 41.65967 REMARK 290 SMTRY1 10 -0.500000 0.866025 0.000000 20.44900 REMARK 290 SMTRY2 10 0.866025 0.500000 0.000000 11.80624 REMARK 290 SMTRY3 10 0.000000 0.000000 -1.000000 41.65967 REMARK 290 SMTRY1 11 1.000000 0.000000 0.000000 20.44900 REMARK 290 SMTRY2 11 0.000000 -1.000000 0.000000 11.80624 REMARK 290 SMTRY3 11 0.000000 0.000000 -1.000000 41.65967 REMARK 290 SMTRY1 12 -0.500000 -0.866025 0.000000 20.44900 REMARK 290 SMTRY2 12 -0.866025 0.500000 0.000000 11.80624 REMARK 290 SMTRY3 12 0.000000 0.000000 -1.000000 41.65967 REMARK 290 SMTRY1 13 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 13 0.000000 1.000000 0.000000 23.61247 REMARK 290 SMTRY3 13 0.000000 0.000000 1.000000 83.31933 REMARK 290 SMTRY1 14 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 14 0.866025 -0.500000 0.000000 23.61247 REMARK 290 SMTRY3 14 0.000000 0.000000 1.000000 83.31933 REMARK 290 SMTRY1 15 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 15 -0.866025 -0.500000 0.000000 23.61247 REMARK 290 SMTRY3 15 0.000000 0.000000 1.000000 83.31933 REMARK 290 SMTRY1 16 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 16 0.866025 0.500000 0.000000 23.61247 REMARK 290 SMTRY3 16 0.000000 0.000000 -1.000000 83.31933 REMARK 290 SMTRY1 17 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 17 0.000000 -1.000000 0.000000 23.61247 REMARK 290 SMTRY3 17 0.000000 0.000000 -1.000000 83.31933 REMARK 290 SMTRY1 18 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 18 -0.866025 0.500000 0.000000 23.61247 REMARK 290 SMTRY3 18 0.000000 0.000000 -1.000000 83.31933 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 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 1550 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 5910 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -17.0 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 BIOMT1 2 1.000000 0.000000 0.000000 0.00000 REMARK 350 BIOMT2 2 0.000000 -1.000000 0.000000 23.61247 REMARK 350 BIOMT3 2 0.000000 0.000000 -1.000000 -41.65967 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 A 220 LIES ON A SPECIAL POSITION. REMARK 375 HOH A 249 LIES ON A SPECIAL POSITION. REMARK 375 HOH A 253 LIES ON A SPECIAL POSITION. REMARK 375 HOH A 255 LIES ON A SPECIAL POSITION. REMARK 375 HOH A 269 LIES ON A SPECIAL POSITION. 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 O HOH A 203 O HOH A 260 1.98 REMARK 500 O HOH A 202 O HOH A 234 2.03 REMARK 500 O HOH A 230 O HOH A 276 2.04 REMARK 500 O HOH A 227 O HOH A 279 2.06 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS REMARK 500 REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC REMARK 500 SYMMETRY ARE IN CLOSE CONTACT. AN ATOM LOCATED WITHIN 0.15 REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375 REMARK 500 INSTEAD OF REMARK 500. ATOMS WITH NON-BLANK ALTERNATE REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS. REMARK 500 REMARK 500 DISTANCE CUTOFF: REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI SSYMOP DISTANCE REMARK 500 O HOH A 208 O HOH A 212 6555 2.07 REMARK 500 O HOH A 208 O HOH A 244 5565 2.09 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: PLANAR GROUPS REMARK 500 REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS REMARK 500 AN RMSD GREATER THAN THIS VALUE REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 M RES CSSEQI RMS TYPE REMARK 500 C A 15 0.06 SIDE CHAIN 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 CA A 101 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 U A 16 OP1 REMARK 620 2 HOH A 208 O 69.5 REMARK 620 3 HOH A 215 O 171.6 112.9 REMARK 620 4 HOH A 244 O 120.5 53.2 64.3 REMARK 620 5 HOH A 259 O 83.3 65.7 90.4 86.5 REMARK 620 6 HOH A 265 O 95.9 161.9 83.1 135.6 124.9 REMARK 620 7 HOH A 267 O 94.2 98.4 93.4 81.0 163.7 71.3 REMARK 620 N 1 2 3 4 5 6 DBREF 9OL1 A 1 16 PDB 9OL1 9OL1 1 16 SEQRES 1 A 16 A G A G A A DI A U RSP U U C SEQRES 2 A 16 U C U HET RSP A 10 20 HET CA A 101 1 HETNAM RSP 4-AMINO-1-(5-O-PHOSPHONO-BETA-D-RIBOFURANOSYL) HETNAM 2 RSP PYRIMIDINE-2(1H)-THIONE HETNAM CA CALCIUM ION FORMUL 1 RSP C9 H14 N3 O7 P S FORMUL 2 CA CA 2+ FORMUL 3 HOH *80(H2 O) LINK O3' U A 9 P RSP A 10 1555 1555 1.60 LINK O3' RSP A 10 P U A 11 1555 1555 1.60 LINK OP1 U A 16 CA CA A 101 1555 1555 2.07 LINK CA CA A 101 O HOH A 208 1555 1555 2.43 LINK CA CA A 101 O HOH A 215 1555 9455 2.23 LINK CA CA A 101 O HOH A 244 1555 5565 2.22 LINK CA CA A 101 O HOH A 259 1555 1555 2.36 LINK CA CA A 101 O HOH A 265 1555 9455 2.41 LINK CA CA A 101 O HOH A 267 1555 1555 2.23 CRYST1 40.898 40.898 124.979 90.00 90.00 120.00 H 3 2 18 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 0.024451 0.014117 0.000000 0.00000 SCALE2 0.000000 0.028234 0.000000 0.00000 SCALE3 0.000000 0.000000 0.008001 0.00000 CONECT 183 195 CONECT 195 183 212 213 214 CONECT 196 197 203 204 CONECT 197 196 198 199 CONECT 198 197 CONECT 199 197 200 CONECT 200 199 201 202 CONECT 201 200 CONECT 202 200 203 CONECT 203 196 202 CONECT 204 196 205 210 CONECT 205 204 206 207 CONECT 206 205 CONECT 207 205 208 209 CONECT 208 207 215 CONECT 209 207 210 211 CONECT 210 204 209 CONECT 211 209 212 CONECT 212 195 211 CONECT 213 195 CONECT 214 195 CONECT 215 208 CONECT 316 336 CONECT 336 316 344 395 403 CONECT 344 336 CONECT 395 336 CONECT 403 336 MASTER 385 0 2 0 0 0 0 6 415 1 27 2 END