PDB Short entry for 3BSU HEADER HYDROLASE/RNA/DNA 26-DEC-07 3BSU TITLE HYBRID-BINDING DOMAIN OF HUMAN RNASE H1 IN COMPLEX WITH 12-MER RNA/DNA COMPND MOL_ID: 1; COMPND 2 MOLECULE: RNA (5'-R(*GP*AP*CP*AP*CP*CP*UP*GP*AP*UP*UP*C)-3'); COMPND 3 CHAIN: D, I; COMPND 4 ENGINEERED: YES; COMPND 5 MOL_ID: 2; COMPND 6 MOLECULE: DNA (5'-D(*DGP*DAP*DAP*DTP*DCP*DAP*DGP*DGP*(5IU) COMPND 7 P*DGP*DTP*DC)-3'); COMPND 8 CHAIN: E, J; COMPND 9 ENGINEERED: YES; COMPND 10 MOL_ID: 3; COMPND 11 MOLECULE: RIBONUCLEASE H1; COMPND 12 CHAIN: A, B, C, F, G, H; COMPND 13 FRAGMENT: CATALYTIC DOMAIN; COMPND 14 SYNONYM: RNASE H1; RIBONUCLEASE H TYPE II; COMPND 15 EC: 3.1.26.4; COMPND 16 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 SYNTHETIC: YES; SOURCE 3 MOL_ID: 2; SOURCE 4 SYNTHETIC: YES; SOURCE 5 MOL_ID: 3; SOURCE 6 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 7 ORGANISM_COMMON: HUMAN; SOURCE 8 ORGANISM_TAXID: 9606; SOURCE 9 GENE: RNASEH1, RNH1; SOURCE 10 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 11 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 12 EXPRESSION_SYSTEM_STRAIN: BL21 ROSETTA; SOURCE 13 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 14 EXPRESSION_SYSTEM_PLASMID: PET15 KEYWDS RNASE H, RNA/DNA HYBRID, DSRNA, HYDROLASE-RNA-DNA COMPLEX EXPDTA X-RAY DIFFRACTION AUTHOR M.NOWOTNY,S.M.CERRITELLI,R.GHIRLANDO,S.A.GAIDAMAKOV,R.J.CROUCH,W.YANG REVDAT 4 21-FEB-24 3BSU 1 REMARK SEQADV LINK REVDAT 3 24-FEB-09 3BSU 1 VERSN REVDAT 2 22-JUL-08 3BSU 1 JRNL REMARK REVDAT 1 25-MAR-08 3BSU 0 JRNL AUTH M.NOWOTNY,S.M.CERRITELLI,R.GHIRLANDO,S.A.GAIDAMAKOV, JRNL AUTH 2 R.J.CROUCH,W.YANG JRNL TITL SPECIFIC RECOGNITION OF RNA/DNA HYBRID AND ENHANCEMENT OF JRNL TITL 2 HUMAN RNASE H1 ACTIVITY BY HBD. JRNL REF EMBO J. V. 27 1172 2008 JRNL REFN ISSN 0261-4189 JRNL PMID 18337749 JRNL DOI 10.1038/EMBOJ.2008.44 REMARK 2 REMARK 2 RESOLUTION. 2.10 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS 1.1 REMARK 3 AUTHORS : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE- REMARK 3 : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU, REMARK 3 : READ,RICE,SIMONSON,WARREN REMARK 3 REMARK 3 REFINEMENT TARGET : ENGH & HUBER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.10 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 50.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 DATA CUTOFF HIGH (ABS(F)) : NULL REMARK 3 DATA CUTOFF LOW (ABS(F)) : NULL REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 96.3 REMARK 3 NUMBER OF REFLECTIONS : 23892 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 R VALUE (WORKING SET) : 0.220 REMARK 3 FREE R VALUE : 0.290 REMARK 3 FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 FREE R VALUE TEST SET COUNT : 2360 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : NULL REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : NULL REMARK 3 BIN RESOLUTION RANGE HIGH (A) : NULL REMARK 3 BIN RESOLUTION RANGE LOW (A) : NULL REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 REFLECTIONS IN BIN (WORKING SET) : NULL REMARK 3 BIN R VALUE (WORKING SET) : NULL REMARK 3 BIN FREE R VALUE : NULL REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 BIN FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2456 REMARK 3 NUCLEIC ACID ATOMS : 990 REMARK 3 HETEROGEN ATOMS : 2 REMARK 3 SOLVENT ATOMS : 252 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 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM C-V SIGMAA (A) : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.010 REMARK 3 BOND ANGLES (DEGREES) : 1.270 REMARK 3 DIHEDRAL ANGLES (DEGREES) : NULL REMARK 3 IMPROPER ANGLES (DEGREES) : NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : 1.427 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 2.293 ; 2.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 1.942 ; 2.000 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 2.793 ; 2.500 REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : NULL REMARK 3 KSOL : NULL REMARK 3 BSOL : NULL REMARK 3 REMARK 3 NCS MODEL : NULL REMARK 3 REMARK 3 NCS RESTRAINTS. RMS SIGMA/WEIGHT REMARK 3 GROUP 1 POSITIONAL (A) : NULL ; NULL REMARK 3 GROUP 1 B-FACTOR (A**2) : NULL ; NULL REMARK 3 REMARK 3 PARAMETER FILE 1 : NULL REMARK 3 TOPOLOGY FILE 1 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 3BSU COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 03-JAN-08. REMARK 100 THE DEPOSITION ID IS D_1000045925. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 03-AUG-06 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 7.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : APS REMARK 200 BEAMLINE : 22-ID REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.97928 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : MARMOSAIC 300 MM CCD REMARK 200 INTENSITY-INTEGRATION SOFTWARE : XDS REMARK 200 DATA SCALING SOFTWARE : XDS REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 23892 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.100 REMARK 200 RESOLUTION RANGE LOW (A) : 50.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 96.3 REMARK 200 DATA REDUNDANCY : 3.600 REMARK 200 R MERGE (I) : 0.06100 REMARK 200 R SYM (I) : NULL REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : NULL REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.10 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.20 REMARK 200 COMPLETENESS FOR SHELL (%) : 95.6 REMARK 200 DATA REDUNDANCY IN SHELL : 3.60 REMARK 200 R MERGE FOR SHELL (I) : 0.39600 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : 3.900 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 (%): 37.21 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.96 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 1.2 M NACL, 0.1 M HEPES (PH 7.5), REMARK 280 VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 294K 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 22.74600 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 70.16100 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 32.13100 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 70.16100 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 22.74600 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 32.13100 REMARK 290 SMTRY3 4 0.000000 0.000000 -1.000000 0.00000 REMARK 290 REMARK 290 REMARK: NULL REMARK 300 REMARK 300 BIOMOLECULE: 1, 2 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: PENTAMERIC REMARK 350 APPLY THE FOLLOWING TO CHAINS: D, E, A, B, C 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 REMARK 350 BIOMOLECULE: 2 REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: PENTAMERIC REMARK 350 APPLY THE FOLLOWING TO CHAINS: I, J, F, G, H 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 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 GLY A 24 REMARK 465 SER A 25 REMARK 465 SER A 74 REMARK 465 ALA A 75 REMARK 465 SER A 76 REMARK 465 GLY B 24 REMARK 465 SER B 25 REMARK 465 SER B 74 REMARK 465 ALA B 75 REMARK 465 SER B 76 REMARK 465 GLY C 24 REMARK 465 SER C 25 REMARK 465 HIS C 26 REMARK 465 ALA C 75 REMARK 465 SER C 76 REMARK 465 GLY F 24 REMARK 465 SER F 74 REMARK 465 ALA F 75 REMARK 465 SER F 76 REMARK 465 SER G 74 REMARK 465 ALA G 75 REMARK 465 SER G 76 REMARK 465 GLY H 24 REMARK 465 SER H 25 REMARK 465 LYS H 73 REMARK 465 SER H 74 REMARK 465 ALA H 75 REMARK 465 SER H 76 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 SER C 74 OG REMARK 470 SER F 25 OG REMARK 470 HIS H 26 CG ND1 CD2 CE1 NE2 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 HIS G 26 57.60 -140.77 REMARK 500 ARG H 52 19.54 58.06 REMARK 500 LYS H 59 144.84 -173.65 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 MG C 502 DBREF 3BSU A 24 76 UNP O60930 RNH1_HUMAN 24 76 DBREF 3BSU B 24 76 UNP O60930 RNH1_HUMAN 24 76 DBREF 3BSU C 24 76 UNP O60930 RNH1_HUMAN 24 76 DBREF 3BSU F 24 76 UNP O60930 RNH1_HUMAN 24 76 DBREF 3BSU G 24 76 UNP O60930 RNH1_HUMAN 24 76 DBREF 3BSU H 24 76 UNP O60930 RNH1_HUMAN 24 76 DBREF 3BSU D 1 12 PDB 3BSU 3BSU 1 12 DBREF 3BSU E 1 12 PDB 3BSU 3BSU 1 12 DBREF 3BSU I 1 12 PDB 3BSU 3BSU 1 12 DBREF 3BSU J 1 12 PDB 3BSU 3BSU 1 12 SEQADV 3BSU SER A 25 UNP O60930 PHE 25 CLONING ARTIFACT SEQADV 3BSU HIS A 26 UNP O60930 GLY 26 CLONING ARTIFACT SEQADV 3BSU SER B 25 UNP O60930 PHE 25 CLONING ARTIFACT SEQADV 3BSU HIS B 26 UNP O60930 GLY 26 CLONING ARTIFACT SEQADV 3BSU SER C 25 UNP O60930 PHE 25 CLONING ARTIFACT SEQADV 3BSU HIS C 26 UNP O60930 GLY 26 CLONING ARTIFACT SEQADV 3BSU SER F 25 UNP O60930 PHE 25 CLONING ARTIFACT SEQADV 3BSU HIS F 26 UNP O60930 GLY 26 CLONING ARTIFACT SEQADV 3BSU SER G 25 UNP O60930 PHE 25 CLONING ARTIFACT SEQADV 3BSU HIS G 26 UNP O60930 GLY 26 CLONING ARTIFACT SEQADV 3BSU SER H 25 UNP O60930 PHE 25 CLONING ARTIFACT SEQADV 3BSU HIS H 26 UNP O60930 GLY 26 CLONING ARTIFACT SEQRES 1 D 12 G A C A C C U G A U U C SEQRES 1 E 12 DG DA DA DT DC DA DG DG 5IU DG DT DC SEQRES 1 I 12 G A C A C C U G A U U C SEQRES 1 J 12 DG DA DA DT DC DA DG DG 5IU DG DT DC SEQRES 1 A 53 GLY SER HIS MET PHE TYR ALA VAL ARG ARG GLY ARG LYS SEQRES 2 A 53 THR GLY VAL PHE LEU THR TRP ASN GLU CYS ARG ALA GLN SEQRES 3 A 53 VAL ASP ARG PHE PRO ALA ALA ARG PHE LYS LYS PHE ALA SEQRES 4 A 53 THR GLU ASP GLU ALA TRP ALA PHE VAL ARG LYS SER ALA SEQRES 5 A 53 SER SEQRES 1 B 53 GLY SER HIS MET PHE TYR ALA VAL ARG ARG GLY ARG LYS SEQRES 2 B 53 THR GLY VAL PHE LEU THR TRP ASN GLU CYS ARG ALA GLN SEQRES 3 B 53 VAL ASP ARG PHE PRO ALA ALA ARG PHE LYS LYS PHE ALA SEQRES 4 B 53 THR GLU ASP GLU ALA TRP ALA PHE VAL ARG LYS SER ALA SEQRES 5 B 53 SER SEQRES 1 C 53 GLY SER HIS MET PHE TYR ALA VAL ARG ARG GLY ARG LYS SEQRES 2 C 53 THR GLY VAL PHE LEU THR TRP ASN GLU CYS ARG ALA GLN SEQRES 3 C 53 VAL ASP ARG PHE PRO ALA ALA ARG PHE LYS LYS PHE ALA SEQRES 4 C 53 THR GLU ASP GLU ALA TRP ALA PHE VAL ARG LYS SER ALA SEQRES 5 C 53 SER SEQRES 1 F 53 GLY SER HIS MET PHE TYR ALA VAL ARG ARG GLY ARG LYS SEQRES 2 F 53 THR GLY VAL PHE LEU THR TRP ASN GLU CYS ARG ALA GLN SEQRES 3 F 53 VAL ASP ARG PHE PRO ALA ALA ARG PHE LYS LYS PHE ALA SEQRES 4 F 53 THR GLU ASP GLU ALA TRP ALA PHE VAL ARG LYS SER ALA SEQRES 5 F 53 SER SEQRES 1 G 53 GLY SER HIS MET PHE TYR ALA VAL ARG ARG GLY ARG LYS SEQRES 2 G 53 THR GLY VAL PHE LEU THR TRP ASN GLU CYS ARG ALA GLN SEQRES 3 G 53 VAL ASP ARG PHE PRO ALA ALA ARG PHE LYS LYS PHE ALA SEQRES 4 G 53 THR GLU ASP GLU ALA TRP ALA PHE VAL ARG LYS SER ALA SEQRES 5 G 53 SER SEQRES 1 H 53 GLY SER HIS MET PHE TYR ALA VAL ARG ARG GLY ARG LYS SEQRES 2 H 53 THR GLY VAL PHE LEU THR TRP ASN GLU CYS ARG ALA GLN SEQRES 3 H 53 VAL ASP ARG PHE PRO ALA ALA ARG PHE LYS LYS PHE ALA SEQRES 4 H 53 THR GLU ASP GLU ALA TRP ALA PHE VAL ARG LYS SER ALA SEQRES 5 H 53 SER MODRES 3BSU 5IU E 9 DU 5-IODO-2'-DEOXYURIDINE-5'-MONOPHOSPHATE MODRES 3BSU 5IU J 9 DU 5-IODO-2'-DEOXYURIDINE-5'-MONOPHOSPHATE HET 5IU E 9 20 HET 5IU J 9 20 HET MG A 501 1 HET MG C 502 1 HETNAM 5IU 5-IODO-2'-DEOXYURIDINE-5'-MONOPHOSPHATE HETNAM MG MAGNESIUM ION FORMUL 2 5IU 2(C9 H12 I N2 O8 P) FORMUL 11 MG 2(MG 2+) FORMUL 13 HOH *252(H2 O) HELIX 1 1 THR A 42 ASP A 51 1 10 HELIX 2 2 THR A 63 LYS A 73 1 11 HELIX 3 3 THR B 42 ASP B 51 1 10 HELIX 4 4 THR B 63 ARG B 72 1 10 HELIX 5 5 THR C 42 ASP C 51 1 10 HELIX 6 6 THR C 63 LYS C 73 1 11 HELIX 7 7 THR F 42 ASP F 51 1 10 HELIX 8 8 THR F 63 LYS F 73 1 11 HELIX 9 9 THR G 42 ASP G 51 1 10 HELIX 10 10 THR G 63 ARG G 72 1 10 HELIX 11 11 THR H 42 ASP H 51 1 10 HELIX 12 12 THR H 63 ARG H 72 1 10 SHEET 1 A 3 GLY A 38 PHE A 40 0 SHEET 2 A 3 PHE A 28 ARG A 33 -1 N TYR A 29 O PHE A 40 SHEET 3 A 3 ARG A 57 PHE A 61 -1 O PHE A 61 N PHE A 28 SHEET 1 B 3 GLY B 38 PHE B 40 0 SHEET 2 B 3 PHE B 28 ARG B 33 -1 N TYR B 29 O PHE B 40 SHEET 3 B 3 ARG B 57 PHE B 61 -1 O PHE B 61 N PHE B 28 SHEET 1 C 3 GLY C 38 PHE C 40 0 SHEET 2 C 3 PHE C 28 ARG C 33 -1 N TYR C 29 O PHE C 40 SHEET 3 C 3 ARG C 57 PHE C 61 -1 O PHE C 61 N PHE C 28 SHEET 1 D 3 GLY F 38 PHE F 40 0 SHEET 2 D 3 PHE F 28 ARG F 33 -1 N TYR F 29 O PHE F 40 SHEET 3 D 3 ARG F 57 PHE F 61 -1 O PHE F 61 N PHE F 28 SHEET 1 E 3 GLY G 38 PHE G 40 0 SHEET 2 E 3 PHE G 28 ARG G 33 -1 N TYR G 29 O PHE G 40 SHEET 3 E 3 ARG G 57 PHE G 61 -1 O PHE G 61 N PHE G 28 SHEET 1 F 3 GLY H 38 PHE H 40 0 SHEET 2 F 3 PHE H 28 ARG H 33 -1 N TYR H 29 O PHE H 40 SHEET 3 F 3 ARG H 57 PHE H 61 -1 O PHE H 61 N PHE H 28 LINK O3' DG E 8 P 5IU E 9 1555 1555 1.62 LINK O3' 5IU E 9 P DG E 10 1555 1555 1.60 LINK O3' DG J 8 P 5IU J 9 1555 1555 1.61 LINK O3' 5IU J 9 P DG J 10 1555 1555 1.60 LINK OE1 GLU A 45 MG MG A 501 1555 1555 1.96 LINK OE2 GLU C 45 MG MG C 502 1555 1555 2.12 SITE 1 AC1 3 PHE C 40 LEU C 41 GLU C 45 CRYST1 45.492 64.262 140.322 90.00 90.00 90.00 P 21 21 21 24 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 0.021982 0.000000 0.000000 0.00000 SCALE2 0.000000 0.015561 0.000000 0.00000 SCALE3 0.000000 0.000000 0.007126 0.00000