HEADER LYASE 13-OCT-04 1XQP TITLE CRYSTAL STRUCTURE OF 8-OXOGUANOSINE COMPLEXED PA-AGOG, 8-OXOGUANINE TITLE 2 DNA GLYCOSYLASE FROM PYROBACULUM AEROPHILUM COMPND MOL_ID: 1; COMPND 2 MOLECULE: 8-OXOGUANINE DNA GLYCOSYLASE; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: PYROBACULUM AEROPHILUM; SOURCE 3 ORGANISM_TAXID: 13773; SOURCE 4 GENE: PA-AGOG; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 7 EXPRESSION_SYSTEM_STRAIN: B834(DE3); SOURCE 8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 9 EXPRESSION_SYSTEM_PLASMID: PET28C(+) KEYWDS HELIX-HAIRPIN-HELIX, 8-OXOGUANINE DNA GLYCOSYLASE, ARCHAEA, KEYWDS 2 P.AEROPHILUM, PA-AGOG-8-OXOGUANOSINE COMPLEX, DNA REPAIR, LYASE EXPDTA X-RAY DIFFRACTION AUTHOR G.M.LINGARAJU,A.A.SARTORI,D.KOSTREWA,A.E.PROTA,J.JIRICNY,F.K.WINKLER REVDAT 5 11-OCT-17 1XQP 1 REMARK REVDAT 4 16-APR-14 1XQP 1 REMARK VERSN REVDAT 3 24-FEB-09 1XQP 1 VERSN REVDAT 2 01-MAR-05 1XQP 1 JRNL REVDAT 1 16-NOV-04 1XQP 0 JRNL AUTH G.M.LINGARAJU,A.A.SARTORI,D.KOSTREWA,A.E.PROTA,J.JIRICNY, JRNL AUTH 2 F.K.WINKLER JRNL TITL A DNA GLYCOSYLASE FROM PYROBACULUM AEROPHILUM WITH AN JRNL TITL 2 8-OXOGUANINE BINDING MODE AND A NONCANONICAL JRNL TITL 3 HELIX-HAIRPIN-HELIX STRUCTURE JRNL REF STRUCTURE V. 13 87 2005 JRNL REFN ISSN 0969-2126 JRNL PMID 15642264 JRNL DOI 10.1016/J.STR.2004.10.011 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH A.A.SARTORI,G.M.LINGARAJU,P.HUNZIKER,F.K.WINKLER,J.JIRICNY REMARK 1 TITL A NOVEL HIGHLY THERMOSTABLE 8-OXOGUANINE DNA GLYCOSYLASE REMARK 1 TITL 2 FROM PYROBACULUM AEROPHILUM REMARK 1 REF TO BE PUBLISHED REMARK 1 REFN REMARK 2 REMARK 2 RESOLUTION. 1.69 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.1.9999 REMARK 3 AUTHORS : MURSHUDOV,VAGIN,DODSON REMARK 3 REMARK 3 REFINEMENT TARGET : ENGH & HUBER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.69 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 40.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 96.7 REMARK 3 NUMBER OF REFLECTIONS : 27180 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) : 0.185 REMARK 3 R VALUE (WORKING SET) : 0.183 REMARK 3 FREE R VALUE : 0.225 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.100 REMARK 3 FREE R VALUE TEST SET COUNT : 1452 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) : 1.69 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.73 REMARK 3 REFLECTION IN BIN (WORKING SET) : 1830 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 BIN R VALUE (WORKING SET) : 0.3040 REMARK 3 BIN FREE R VALUE SET COUNT : 104 REMARK 3 BIN FREE R VALUE : 0.3880 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2049 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 40 REMARK 3 SOLVENT ATOMS : 227 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 32.60 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 28.83 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : -0.16000 REMARK 3 B22 (A**2) : -0.40000 REMARK 3 B33 (A**2) : 0.56000 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): 0.115 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.114 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.084 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 4.829 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.966 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.942 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 2153 ; 0.016 ; 0.022 REMARK 3 BOND LENGTHS OTHERS (A): 2037 ; 0.001 ; 0.020 REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 2925 ; 1.609 ; 1.987 REMARK 3 BOND ANGLES OTHERS (DEGREES): 4706 ; 1.428 ; 3.000 REMARK 3 TORSION ANGLES, PERIOD 1 (DEGREES): 252 ; 5.036 ; 5.000 REMARK 3 TORSION ANGLES, PERIOD 2 (DEGREES): 97 ;29.615 ;21.856 REMARK 3 TORSION ANGLES, PERIOD 3 (DEGREES): 378 ;13.171 ;15.000 REMARK 3 TORSION ANGLES, PERIOD 4 (DEGREES): 25 ;14.831 ;15.000 REMARK 3 CHIRAL-CENTER RESTRAINTS (A**3): 323 ; 0.156 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 2324 ; 0.006 ; 0.020 REMARK 3 GENERAL PLANES OTHERS (A): 464 ; 0.001 ; 0.020 REMARK 3 NON-BONDED CONTACTS REFINED ATOMS (A): 409 ; 0.208 ; 0.200 REMARK 3 NON-BONDED CONTACTS OTHERS (A): 1813 ; 0.175 ; 0.200 REMARK 3 NON-BONDED TORSION REFINED ATOMS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED TORSION OTHERS (A): 1051 ; 0.083 ; 0.200 REMARK 3 H-BOND (X...Y) REFINED ATOMS (A): 117 ; 0.153 ; 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): 17 ; 0.135 ; 0.200 REMARK 3 SYMMETRY VDW OTHERS (A): 49 ; 0.280 ; 0.200 REMARK 3 SYMMETRY H-BOND REFINED ATOMS (A): 6 ; 0.127 ; 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): 1643 ; 1.010 ; 1.500 REMARK 3 MAIN-CHAIN BOND OTHER ATOMS (A**2): 511 ; 0.204 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE REFINED ATOMS (A**2): 2040 ; 1.128 ; 2.000 REMARK 3 MAIN-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN BOND REFINED ATOMS (A**2): 1098 ; 1.937 ; 3.000 REMARK 3 SIDE-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): 885 ; 2.738 ; 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 : NULL REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : 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 1XQP COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 19-OCT-04. REMARK 100 THE DEPOSITION ID IS D_1000030655. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 14-NOV-03 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 7.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : N REMARK 200 RADIATION SOURCE : ROTATING ANODE REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : ENRAF-NONIUS FR591 REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.5418 REMARK 200 MONOCHROMATOR : OSMIC MIRROS REMARK 200 OPTICS : OSMIC MIRRORS REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : MAR SCANNER 345 MM PLATE REMARK 200 INTENSITY-INTEGRATION SOFTWARE : MAR REMARK 200 DATA SCALING SOFTWARE : XDS REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 28623 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.690 REMARK 200 RESOLUTION RANGE LOW (A) : 57.740 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : -3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 96.7 REMARK 200 DATA REDUNDANCY : 6.800 REMARK 200 R MERGE (I) : 0.06200 REMARK 200 R SYM (I) : 0.05400 REMARK 200 FOR THE DATA SET : 17.0000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.69 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.80 REMARK 200 COMPLETENESS FOR SHELL (%) : 90.5 REMARK 200 DATA REDUNDANCY IN SHELL : 6.12 REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : 0.57800 REMARK 200 FOR SHELL : 3.470 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS REMARK 200 SOFTWARE USED: PHASES REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 43.00 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.20 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 4000, HEPES-NAOH, NACL, DITHIO REMARK 280 THREITOL, DIMETHYL SULFOXIDE, PH 7.5, VAPOR DIFFUSION, SITTING REMARK 280 DROP, TEMPERATURE 295K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 2 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 36.11000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 49.05500 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 36.11000 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 49.05500 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 300 REMARK: THE BIOLOGICALLY ACTIVE UNIT IS A MONOMER. 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 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 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 C5 8HG A 258 LIES ON A SPECIAL POSITION. REMARK 465 REMARK 465 MISSING RESIDUES REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.) REMARK 465 REMARK 465 M RES C SSSEQI REMARK 465 MET A 1 REMARK 465 ALA A 2 REMARK 465 SER A 255 REMARK 465 GLU A 256 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 GLY A 249 O HOH A 476 1.97 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 LEU A 17 CB - CG - CD1 ANGL. DEV. = 11.8 DEGREES REMARK 500 ASP A 29 CB - CG - OD1 ANGL. DEV. = 5.6 DEGREES REMARK 500 ASP A 83 CB - CG - OD2 ANGL. DEV. = 7.3 DEGREES REMARK 500 GLY A 249 N - CA - C ANGL. DEV. = 17.4 DEGREES REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: TORSION ANGLES REMARK 500 REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS: REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 STANDARD TABLE: REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2) REMARK 500 REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI- REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400 REMARK 500 REMARK 500 M RES CSSEQI PSI PHI REMARK 500 ARG A 195 45.03 -86.18 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 8HG A 257 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE 8HG A 258 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1XQO RELATED DB: PDB REMARK 900 UNCOMPLEXED NATIVE FORM OF THE SAME PROTEIN DBREF 1XQP A 1 256 UNP Q8ZVK6 Q8ZVK6_PYRAE 1 256 SEQRES 1 A 256 MET ALA ALA GLU SER GLN LEU LYS ARG VAL ILE GLU THR SEQRES 2 A 256 LEU ARG ARG LEU GLY ILE GLU GLU VAL LEU LYS LEU GLU SEQRES 3 A 256 ARG ARG ASP PRO GLN TYR ARG ALA VAL CYS ASN VAL VAL SEQRES 4 A 256 LYS ARG HIS GLY GLU THR VAL GLY SER ARG LEU ALA MET SEQRES 5 A 256 LEU ASN ALA LEU ILE SER TYR ARG LEU THR GLY LYS GLY SEQRES 6 A 256 GLU GLU HIS TRP GLU TYR PHE GLY LYS TYR PHE SER GLN SEQRES 7 A 256 LEU GLU VAL ILE ASP LEU CYS ARG ASP PHE LEU LYS TYR SEQRES 8 A 256 ILE GLU THR SER PRO PHE LEU LYS ILE GLY VAL GLU ALA SEQRES 9 A 256 ARG LYS LYS ARG ALA LEU LYS ALA CYS ASP TYR VAL PRO SEQRES 10 A 256 ASN LEU GLU ASP LEU GLY LEU THR LEU ARG GLN LEU SER SEQRES 11 A 256 HIS ILE VAL GLY ALA ARG ARG GLU GLN LYS THR LEU VAL SEQRES 12 A 256 PHE THR ILE LYS ILE LEU ASN TYR ALA TYR MET CYS SER SEQRES 13 A 256 ARG GLY VAL ASN ARG VAL LEU PRO PHE ASP ILE PRO ILE SEQRES 14 A 256 PRO VAL ASP TYR ARG VAL ALA ARG LEU THR TRP CYS ALA SEQRES 15 A 256 GLY LEU ILE ASP PHE PRO PRO GLU GLU ALA LEU ARG ARG SEQRES 16 A 256 TYR GLU ALA VAL GLN LYS ILE TRP ASP ALA VAL ALA ARG SEQRES 17 A 256 GLU THR GLY ILE PRO PRO LEU HIS LEU ASP THR LEU LEU SEQRES 18 A 256 TRP LEU ALA GLY ARG ALA VAL LEU TYR GLY GLU ASN LEU SEQRES 19 A 256 HIS GLY VAL PRO LYS GLU VAL ILE ALA LEU PHE GLN TRP SEQRES 20 A 256 ARG GLY GLY CYS ARG PRO PRO SER GLU HET 8HG A 257 20 HET 8HG A 258 20 HETNAM 8HG 2'-DEOXY-8-OXOGUANOSINE FORMUL 2 8HG 2(C10 H13 N5 O5) FORMUL 4 HOH *227(H2 O) HELIX 1 1 ALA A 3 ARG A 15 1 13 HELIX 2 2 GLY A 18 ARG A 27 1 10 HELIX 3 3 ASP A 29 GLY A 43 1 15 HELIX 4 4 GLY A 43 ILE A 57 1 15 HELIX 5 5 LYS A 64 GLN A 78 1 15 HELIX 6 6 ASP A 83 SER A 95 1 13 HELIX 7 7 GLY A 101 CYS A 113 1 13 HELIX 8 8 ASP A 121 GLY A 134 1 14 HELIX 9 9 GLN A 139 GLY A 158 1 20 HELIX 10 10 ASP A 172 ALA A 182 1 11 HELIX 11 11 PRO A 188 ARG A 195 1 8 HELIX 12 12 ARG A 195 GLY A 211 1 17 HELIX 13 13 PRO A 213 GLY A 231 1 19 HELIX 14 14 PRO A 238 PHE A 245 1 8 SSBOND 1 CYS A 36 CYS A 155 1555 1555 2.05 SSBOND 2 CYS A 85 CYS A 113 1555 1555 2.04 SSBOND 3 CYS A 181 CYS A 251 1555 1555 2.04 SITE 1 AC1 11 GLN A 31 SER A 58 TYR A 59 TRP A 69 SITE 2 AC1 11 LYS A 140 PHE A 144 PRO A 170 ASP A 172 SITE 3 AC1 11 ASP A 218 TRP A 222 HOH A 272 SITE 1 AC2 7 CYS A 85 ARG A 86 LEU A 89 LYS A 106 SITE 2 AC2 7 LEU A 110 HOH A 300 HOH A 485 CRYST1 72.220 98.110 36.170 90.00 90.00 90.00 P 21 21 2 4 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 0.013847 0.000000 0.000000 0.00000 SCALE2 0.000000 0.010193 0.000000 0.00000 SCALE3 0.000000 0.000000 0.027647 0.00000