HEADER RNA 20-NOV-04 1Y27 TITLE G-RIBOSWITCH-GUANINE COMPLEX COMPND MOL_ID: 1; COMPND 2 MOLECULE: BACILLUS SUBTILIS XPT; COMPND 3 CHAIN: X; COMPND 4 FRAGMENT: SEQUENCE DATABASE RESIDUES 185-252; COMPND 5 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: BACILLUS SUBTILIS; SOURCE 3 ORGANISM_TAXID: 1423; SOURCE 4 GENE: XPT; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 7 OTHER_DETAILS: IN VITRO TRANSCRIPTION KEYWDS G-RIBOSWITCH GUANINE RECOGNITION, RNA EXPDTA X-RAY DIFFRACTION AUTHOR A.SERGANOV,Y.R.YUAN,D.J.PATEL REVDAT 6 23-AUG-23 1Y27 1 REMARK REVDAT 5 27-FEB-19 1Y27 1 COMPND SOURCE REMARK DBREF REVDAT 5 2 1 SEQRES HET HETNAM FORMUL REVDAT 5 3 1 LINK SITE ATOM REVDAT 4 11-OCT-17 1Y27 1 REMARK REVDAT 3 13-JUL-11 1Y27 1 VERSN REVDAT 2 24-FEB-09 1Y27 1 VERSN REVDAT 1 28-DEC-04 1Y27 0 JRNL AUTH A.SERGANOV,Y.R.YUAN,O.PIKOVSKAYA,A.POLONSKAIA,L.MALININA, JRNL AUTH 2 A.T.PHAN,C.HOBARTNER,R.MICURA,R.R.BREAKER,D.J.PATEL JRNL TITL STRUCTURAL BASIS FOR DISCRIMINATIVE REGULATION OF GENE JRNL TITL 2 EXPRESSION BY ADENINE- AND GUANINE-SENSING MRNAS JRNL REF CHEM.BIOL. V. 11 1729 2004 JRNL REFN ISSN 1074-5521 JRNL PMID 15610857 JRNL DOI 10.1016/J.CHEMBIOL.2004.11.018 REMARK 2 REMARK 2 RESOLUTION. 2.40 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.2.0005 REMARK 3 AUTHORS : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER, REMARK 3 : NICHOLLS,WINN,LONG,VAGIN REMARK 3 REMARK 3 REFINEMENT TARGET : MAXIMUM LIKELIHOOD REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.40 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 20.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 1.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 97.6 REMARK 3 NUMBER OF REFLECTIONS : 8791 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : THROUGHOUT REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 R VALUE (WORKING + TEST SET) : 0.233 REMARK 3 R VALUE (WORKING SET) : 0.232 REMARK 3 FREE R VALUE : 0.264 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 4.900 REMARK 3 FREE R VALUE TEST SET COUNT : 450 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) : 2.40 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 2.46 REMARK 3 REFLECTION IN BIN (WORKING SET) : 605 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 95.91 REMARK 3 BIN R VALUE (WORKING SET) : 0.3750 REMARK 3 BIN FREE R VALUE SET COUNT : 28 REMARK 3 BIN FREE R VALUE : 0.4650 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 0 REMARK 3 NUCLEIC ACID ATOMS : 1456 REMARK 3 HETEROGEN ATOMS : 11 REMARK 3 SOLVENT ATOMS : 18 REMARK 3 REMARK 3 B VALUES. REMARK 3 B VALUE TYPE : LIKELY RESIDUAL REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 51.30 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 0.80000 REMARK 3 B22 (A**2) : 3.75000 REMARK 3 B33 (A**2) : -4.55000 REMARK 3 B12 (A**2) : 0.00000 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): 0.411 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.267 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.240 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 22.385 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.940 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.926 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 1639 ; 0.009 ; 0.021 REMARK 3 BOND LENGTHS OTHERS (A): NULL ; NULL ; NULL REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 2561 ; 2.477 ; 3.000 REMARK 3 BOND ANGLES OTHERS (DEGREES): NULL ; NULL ; NULL 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): 338 ; 0.063 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 714 ; 0.004 ; 0.020 REMARK 3 GENERAL PLANES OTHERS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED CONTACTS REFINED ATOMS (A): 590 ; 0.192 ; 0.200 REMARK 3 NON-BONDED CONTACTS OTHERS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED TORSION REFINED ATOMS (A): 996 ; 0.270 ; 0.200 REMARK 3 NON-BONDED TORSION OTHERS (A): NULL ; NULL ; NULL REMARK 3 H-BOND (X...Y) REFINED ATOMS (A): 59 ; 0.118 ; 0.200 REMARK 3 H-BOND (X...Y) OTHERS (A): NULL ; NULL ; NULL REMARK 3 POTENTIAL METAL-ION REFINED ATOMS (A): NULL ; NULL ; NULL REMARK 3 POTENTIAL METAL-ION OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY VDW REFINED ATOMS (A): 21 ; 0.176 ; 0.200 REMARK 3 SYMMETRY VDW OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY H-BOND REFINED ATOMS (A): 3 ; 0.129 ; 0.200 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): 2304 ; 0.662 ; 3.000 REMARK 3 SIDE-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): 2550 ; 1.069 ; 4.500 REMARK 3 SIDE-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL 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 : 1 REMARK 3 REMARK 3 TLS GROUP : 1 REMARK 3 NUMBER OF COMPONENTS GROUP : 1 REMARK 3 COMPONENTS C SSSEQI TO C SSSEQI REMARK 3 RESIDUE RANGE : X 14 X 80 REMARK 3 ORIGIN FOR THE GROUP (A): 8.7340 -8.8404 26.8173 REMARK 3 T TENSOR REMARK 3 T11: -0.0140 T22: -0.0559 REMARK 3 T33: -0.0308 T12: 0.0033 REMARK 3 T13: -0.0592 T23: -0.0464 REMARK 3 L TENSOR REMARK 3 L11: 1.7597 L22: 1.0192 REMARK 3 L33: 5.7438 L12: 0.4311 REMARK 3 L13: 0.9346 L23: 0.8252 REMARK 3 S TENSOR REMARK 3 S11: 0.1103 S12: -0.6463 S13: -0.0996 REMARK 3 S21: 0.5141 S22: -0.0790 S23: -0.1423 REMARK 3 S31: 0.0872 S32: -0.4880 S33: -0.0312 REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : BABINET MODEL WITH MASK 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 THE RIDING REMARK 3 POSITIONS REMARK 4 REMARK 4 1Y27 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 15-DEC-04. REMARK 100 THE DEPOSITION ID IS D_1000031022. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 06-OCT-04 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 7 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : NSLS REMARK 200 BEAMLINE : X25 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.14 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : MARRESEARCH REMARK 200 INTENSITY-INTEGRATION SOFTWARE : MAR REMARK 200 DATA SCALING SOFTWARE : HKL-2000 REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 9278 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.400 REMARK 200 RESOLUTION RANGE LOW (A) : 20.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 1.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 1.0 REMARK 200 DATA REDUNDANCY : 7.700 REMARK 200 R MERGE (I) : 0.09200 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) : 2.40 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.49 REMARK 200 COMPLETENESS FOR SHELL (%) : 1.0 REMARK 200 DATA REDUNDANCY IN SHELL : 8.00 REMARK 200 R MERGE FOR SHELL (I) : 0.45600 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: CCP4 REMARK 200 STARTING MODEL: PDB ENTRY 1Y26 REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 54.00 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.70 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: MG, PEG, PH 7, VAPOR DIFFUSION, REMARK 280 HANGING DROP, TEMPERATURE 277K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 2 2 21 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,-Y,Z+1/2 REMARK 290 3555 -X,Y,-Z+1/2 REMARK 290 4555 X,-Y,-Z REMARK 290 5555 X+1/2,Y+1/2,Z REMARK 290 6555 -X+1/2,-Y+1/2,Z+1/2 REMARK 290 7555 -X+1/2,Y+1/2,-Z+1/2 REMARK 290 8555 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 108.71950 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 108.71950 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 0.00000 REMARK 290 SMTRY1 5 1.000000 0.000000 0.000000 20.81600 REMARK 290 SMTRY2 5 0.000000 1.000000 0.000000 25.43900 REMARK 290 SMTRY3 5 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 6 -1.000000 0.000000 0.000000 20.81600 REMARK 290 SMTRY2 6 0.000000 -1.000000 0.000000 25.43900 REMARK 290 SMTRY3 6 0.000000 0.000000 1.000000 108.71950 REMARK 290 SMTRY1 7 -1.000000 0.000000 0.000000 20.81600 REMARK 290 SMTRY2 7 0.000000 1.000000 0.000000 25.43900 REMARK 290 SMTRY3 7 0.000000 0.000000 -1.000000 108.71950 REMARK 290 SMTRY1 8 1.000000 0.000000 0.000000 20.81600 REMARK 290 SMTRY2 8 0.000000 -1.000000 0.000000 25.43900 REMARK 290 SMTRY3 8 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: MONOMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 APPLY THE FOLLOWING TO CHAINS: X 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 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 GDP X 14 C3' - O3' - P ANGL. DEV. = -49.1 DEGREES REMARK 500 G X 15 O3' - P - OP2 ANGL. DEV. = 29.1 DEGREES REMARK 500 G X 15 O3' - P - OP1 ANGL. DEV. = -46.2 DEGREES REMARK 500 C X 50 C5' - C4' - C3' ANGL. DEV. = -8.5 DEGREES REMARK 500 G X 62 C3' - O3' - P ANGL. DEV. = 7.7 DEGREES REMARK 500 CCC X 81 O3' - P - O5' ANGL. DEV. = 17.3 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 GUN X 101 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1Y26 RELATED DB: PDB REMARK 900 A-RIBOSWITCH-ADENINE COMPLEX REMARK 999 REMARK 999 SEQUENCE REMARK 999 THE G-RIBOSWITCH SEQUENCE WAS DERIVED FROM THE REMARK 999 SEQUENCE LOCATED UPSTREAM OF THE XPT GENE REMARK 999 (XPT-PBUX OPERON) ENCODING FOR THE XANTHINE REMARK 999 PHOPHORIBOSYLTRANSFERASE FROM BACILLUS REMARK 999 SUBTILIS. THE STRUCTURE IN THIS ENTRY REMARK 999 IS A COMPLEX BETWEEN GUANINE AND A DOMAIN REMARK 999 (APTAMER DOMAIN) OF THE RIBOSWITCH, WHICH REMARK 999 SHUTS DOWN TRANSCRIPTION OF THE XPT GENE REMARK 999 IN RESPONSE TO THE PRESENCE OF PURINES REMARK 999 IN THE CELL. REMARK 999 THIS SEQUENCE CAN BE FOUND NATURALLY REMARK 999 AND THE DATABASE MATCH IS FOUND REMARK 999 IN BACILLUS SUBTILIS GENEBANK REMARK 999 ENTRY 633168 X83878 (RESIDUES 185-252). DBREF 1Y27 X 14 81 PDB 1Y27 1Y27 14 81 SEQRES 1 X 68 GDP G A U C A U A U A A U C SEQRES 2 X 68 G C G U G G A U A U G G C SEQRES 3 X 68 A C G C A A G U U U C U A SEQRES 4 X 68 C C G G G C A C C G U A A SEQRES 5 X 68 A U G U C C G A C U A U G SEQRES 6 X 68 G U CCC MODRES 1Y27 GDP X 14 G GUANOSINE-5'-DIPHOSPHATE HET GDP X 14 28 HET CCC X 81 23 HET GUN X 101 11 HETNAM GDP GUANOSINE-5'-DIPHOSPHATE HETNAM CCC CYTIDINE-5'-PHOSPHATE-2',3'-CYCLIC PHOSPHATE HETNAM GUN GUANINE FORMUL 1 GDP C10 H15 N5 O11 P2 FORMUL 1 CCC C9 H13 N3 O10 P2 FORMUL 2 GUN C5 H5 N5 O FORMUL 3 HOH *18(H2 O) LINK O3' GDP X 14 P G X 15 1555 1555 1.59 LINK O3' U X 80 P CCC X 81 1555 1555 1.59 SITE 1 AC1 8 A X 21 U X 22 U X 47 U X 51 SITE 2 AC1 8 A X 52 A X 73 C X 74 U X 75 CRYST1 41.632 50.878 217.439 90.00 90.00 90.00 C 2 2 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 0.024020 0.000000 0.000000 0.00000 SCALE2 0.000000 0.019655 0.000000 0.00000 SCALE3 0.000000 0.000000 0.004599 0.00000 HETATM 1 PB GDP X 14 7.318 -26.283 3.101 1.00 76.47 P HETATM 2 O1B GDP X 14 7.030 -27.549 2.320 1.00 75.32 O HETATM 3 O2B GDP X 14 6.877 -26.487 4.536 1.00 76.17 O HETATM 4 O3B GDP X 14 6.573 -25.109 2.491 1.00 75.67 O HETATM 5 O3A GDP X 14 8.902 -25.971 3.065 1.00 74.31 O HETATM 6 PA GDP X 14 9.519 -24.646 3.754 1.00 72.47 P HETATM 7 O1A GDP X 14 9.561 -23.494 2.773 1.00 72.69 O HETATM 8 O2A GDP X 14 8.742 -24.245 4.988 1.00 72.78 O HETATM 9 O5' GDP X 14 11.013 -25.114 4.141 1.00 69.15 O HETATM 10 C5' GDP X 14 11.229 -26.139 5.106 1.00 63.88 C HETATM 11 C4' GDP X 14 12.694 -26.572 5.105 1.00 60.17 C HETATM 12 O4' GDP X 14 13.124 -26.925 3.778 1.00 57.84 O HETATM 13 C3' GDP X 14 13.655 -25.514 5.652 1.00 57.92 C HETATM 14 O3' GDP X 14 13.848 -25.732 7.047 1.00 58.09 O HETATM 15 C2' GDP X 14 14.905 -25.834 4.842 1.00 57.22 C HETATM 16 O2' GDP X 14 15.723 -26.807 5.505 1.00 56.40 O HETATM 17 C1' GDP X 14 14.449 -26.449 3.524 1.00 55.61 C HETATM 18 N9 GDP X 14 14.475 -25.408 2.449 1.00 55.23 N HETATM 19 C8 GDP X 14 13.389 -24.828 1.898 1.00 54.85 C HETATM 20 N7 GDP X 14 13.722 -23.913 0.952 1.00 54.52 N HETATM 21 C5 GDP X 14 15.064 -23.881 0.882 1.00 54.83 C HETATM 22 C6 GDP X 14 16.074 -23.127 0.089 1.00 54.73 C HETATM 23 O6 GDP X 14 15.727 -22.280 -0.763 1.00 54.40 O HETATM 24 N1 GDP X 14 17.372 -23.382 0.314 1.00 54.57 N HETATM 25 C2 GDP X 14 17.779 -24.287 1.224 1.00 54.55 C HETATM 26 N2 GDP X 14 19.110 -24.477 1.376 1.00 54.66 N HETATM 27 N3 GDP X 14 16.912 -25.017 1.985 1.00 54.60 N HETATM 28 C4 GDP X 14 15.563 -24.865 1.866 1.00 55.04 C