HEADER HYDROLASE 29-JUN-99 1QTW TITLE HIGH-RESOLUTION CRYSTAL STRUCTURE OF THE ESCHERICHIA COLI DNA REPAIR TITLE 2 ENZYME ENDONUCLEASE IV COMPND MOL_ID: 1; COMPND 2 MOLECULE: ENDONUCLEASE IV; COMPND 3 CHAIN: A; COMPND 4 EC: 3.1.21.2; COMPND 5 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI; SOURCE 3 ORGANISM_TAXID: 562; SOURCE 4 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 5 EXPRESSION_SYSTEM_TAXID: 562 KEYWDS DNA REPAIR ENZYME, TIM BARREL, TRINUCLEAR ZN CLUSTER, HYDROLASE EXPDTA X-RAY DIFFRACTION AUTHOR D.J.HOSFIELD,Y.GUAN,B.J.HAAS,R.P.CUNNINGHAM,J.A.TAINER REVDAT 7 14-FEB-24 1QTW 1 REMARK LINK REVDAT 6 04-OCT-17 1QTW 1 REMARK REVDAT 5 24-FEB-09 1QTW 1 VERSN REVDAT 4 24-JAN-01 1QTW 1 REMARK REVDAT 3 02-APR-00 1QTW 3 ATOM REMARK REVDAT 2 05-NOV-99 1QTW 3 ATOM REVDAT 1 31-AUG-99 1QTW 0 JRNL AUTH D.J.HOSFIELD,Y.GUAN,B.J.HAAS,R.P.CUNNINGHAM,J.A.TAINER JRNL TITL STRUCTURE OF THE DNA REPAIR ENZYME ENDONUCLEASE IV AND ITS JRNL TITL 2 DNA COMPLEX: DOUBLE-NUCLEOTIDE FLIPPING AT ABASIC SITES AND JRNL TITL 3 THREE-METAL-ION CATALYSIS. JRNL REF CELL(CAMBRIDGE,MASS.) V. 98 397 1999 JRNL REFN ISSN 0092-8674 JRNL PMID 10458614 JRNL DOI 10.1016/S0092-8674(00)81968-6 REMARK 2 REMARK 2 RESOLUTION. 1.02 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : SHELXL-97 REMARK 3 AUTHORS : G.M.SHELDRICK REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.02 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 20.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : NULL REMARK 3 CROSS-VALIDATION METHOD : THROUGHOUT REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT (NO CUTOFF). REMARK 3 R VALUE (WORKING + TEST SET, NO CUTOFF) : 0.124 REMARK 3 R VALUE (WORKING SET, NO CUTOFF) : 0.124 REMARK 3 FREE R VALUE (NO CUTOFF) : 0.148 REMARK 3 FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : 10.000 REMARK 3 FREE R VALUE TEST SET COUNT (NO CUTOFF) : 13710 REMARK 3 TOTAL NUMBER OF REFLECTIONS (NO CUTOFF) : 136221 REMARK 3 REMARK 3 FIT/AGREEMENT OF MODEL FOR DATA WITH F>4SIG(F). REMARK 3 R VALUE (WORKING + TEST SET, F>4SIG(F)) : NULL REMARK 3 R VALUE (WORKING SET, F>4SIG(F)) : 0.119 REMARK 3 FREE R VALUE (F>4SIG(F)) : 0.131 REMARK 3 FREE R VALUE TEST SET SIZE (%, F>4SIG(F)) : 10.000 REMARK 3 FREE R VALUE TEST SET COUNT (F>4SIG(F)) : 11240 REMARK 3 TOTAL NUMBER OF REFLECTIONS (F>4SIG(F)) : 111787 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2216 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 3 REMARK 3 SOLVENT ATOMS : 367 REMARK 3 REMARK 3 MODEL REFINEMENT. REMARK 3 OCCUPANCY SUM OF NON-HYDROGEN ATOMS : NULL REMARK 3 OCCUPANCY SUM OF HYDROGEN ATOMS : NULL REMARK 3 NUMBER OF DISCRETELY DISORDERED RESIDUES : NULL REMARK 3 NUMBER OF LEAST-SQUARES PARAMETERS : NULL REMARK 3 NUMBER OF RESTRAINTS : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM RESTRAINT TARGET VALUES. REMARK 3 BOND LENGTHS (A) : 0.016 REMARK 3 ANGLE DISTANCES (A) : 2.500 REMARK 3 SIMILAR DISTANCES (NO TARGET VALUES) (A) : NULL REMARK 3 DISTANCES FROM RESTRAINT PLANES (A) : NULL REMARK 3 ZERO CHIRAL VOLUMES (A**3) : NULL REMARK 3 NON-ZERO CHIRAL VOLUMES (A**3) : NULL REMARK 3 ANTI-BUMPING DISTANCE RESTRAINTS (A) : NULL REMARK 3 RIGID-BOND ADP COMPONENTS (A**2) : NULL REMARK 3 SIMILAR ADP COMPONENTS (A**2) : NULL REMARK 3 APPROXIMATELY ISOTROPIC ADPS (A**2) : NULL REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED: NULL REMARK 3 REMARK 3 STEREOCHEMISTRY TARGET VALUES : ENGH & HUBER REMARK 3 SPECIAL CASE: NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1QTW COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 01-JUL-99. REMARK 100 THE DEPOSITION ID IS D_1000009261. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 19-MAR-98 REMARK 200 TEMPERATURE (KELVIN) : 100.0 REMARK 200 PH : 6.0 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : SSRL REMARK 200 BEAMLINE : BL9-1 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.9800 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : MARRESEARCH REMARK 200 INTENSITY-INTEGRATION SOFTWARE : SOFTWARE AT SYNCHROTRON REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 142898 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.020 REMARK 200 RESOLUTION RANGE LOW (A) : 30.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : -3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 96.0 REMARK 200 DATA REDUNDANCY : 3.260 REMARK 200 R MERGE (I) : 0.04200 REMARK 200 R SYM (I) : NULL REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 13.2000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.02 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.04 REMARK 200 COMPLETENESS FOR SHELL (%) : 83.2 REMARK 200 DATA REDUNDANCY IN SHELL : 2.20 REMARK 200 R MERGE FOR SHELL (I) : 0.43600 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : 2.500 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL REMARK 200 SOFTWARE USED: SOLVE REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 44.89 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.23 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 400, HEPES, ZNCL2, PH 6.0, VAPOR REMARK 280 DIFFUSION, SITTING DROP AT 298 K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,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 29.78000 REMARK 290 SMTRY3 2 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 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 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 HD1 HIS A 216 ZN ZN A 303 1.24 REMARK 500 REMARK 500 REMARK: NULL 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 HIS A 78 CG HIS A 78 ND1 -0.093 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 TYR A 3 CG - CD2 - CE2 ANGL. DEV. = -5.5 DEGREES REMARK 500 ASP A 25 CB - CG - OD2 ANGL. DEV. = -6.2 DEGREES REMARK 500 TYR A 72 CB - CG - CD2 ANGL. DEV. = 4.3 DEGREES REMARK 500 HIS A 78 CG - ND1 - CE1 ANGL. DEV. = 8.4 DEGREES REMARK 500 GLU A 85 CB - CG - CD ANGL. DEV. = 18.4 DEGREES REMARK 500 GLU A 85 OE1 - CD - OE2 ANGL. DEV. = -8.3 DEGREES REMARK 500 ARG A 97 NE - CZ - NH1 ANGL. DEV. = -5.2 DEGREES REMARK 500 LEU A 114 O - C - N ANGL. DEV. = -9.6 DEGREES REMARK 500 ARG A 125 NE - CZ - NH2 ANGL. DEV. = -4.2 DEGREES REMARK 500 ARG A 213 NE - CZ - NH2 ANGL. DEV. = -3.8 DEGREES REMARK 500 ARG A 230 NE - CZ - NH1 ANGL. DEV. = 5.1 DEGREES REMARK 500 ARG A 230 NE - CZ - NH2 ANGL. DEV. = -3.3 DEGREES REMARK 500 ARG A 245 NE - CZ - NH2 ANGL. DEV. = -5.0 DEGREES REMARK 500 ASP A 251 CB - CG - OD1 ANGL. DEV. = 5.9 DEGREES REMARK 500 ILE A 263 CB - CG1 - CD1 ANGL. DEV. = 20.2 DEGREES REMARK 500 GLU A 270 OE1 - CD - OE2 ANGL. DEV. = -9.3 DEGREES REMARK 500 ALA A 283 O - C - N ANGL. DEV. = -9.8 DEGREES 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 ZN A 301 ZN REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS A 69 NE2 REMARK 620 2 HIS A 109 NE2 110.3 REMARK 620 3 GLU A 145 OE2 98.8 91.9 REMARK 620 4 HOH A1001 O 120.9 123.5 101.6 REMARK 620 N 1 2 3 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 ZN A 303 ZN REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLU A 145 OE1 REMARK 620 2 ASP A 179 OD1 93.9 REMARK 620 3 HIS A 216 ND1 93.7 119.3 REMARK 620 4 GLU A 261 OE1 178.1 86.7 87.6 REMARK 620 5 HOH A1001 O 89.4 126.6 113.6 88.7 REMARK 620 N 1 2 3 4 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 ZN A 302 ZN REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS A 182 NE2 REMARK 620 2 ASP A 229 OD1 93.4 REMARK 620 3 ASP A 229 OD2 88.3 57.5 REMARK 620 4 HIS A 231 NE2 118.9 135.0 90.9 REMARK 620 5 HOH A1002 O 98.6 98.6 155.7 105.7 REMARK 620 6 HOH A1246 O 158.9 69.2 91.9 82.3 73.3 REMARK 620 N 1 2 3 4 5 REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 301 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 302 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 303 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1QUM RELATED DB: PDB REMARK 900 CONTAINS THE HIGH RESOLUTION CRYSTAL STRUCTURE OF ENDOIV WITH BOUND REMARK 900 DNA DBREF 1QTW A 1 285 UNP P0A6C1 END4_ECOLI 1 285 SEQRES 1 A 285 MET LYS TYR ILE GLY ALA HIS VAL SER ALA ALA GLY GLY SEQRES 2 A 285 LEU ALA ASN ALA ALA ILE ARG ALA ALA GLU ILE ASP ALA SEQRES 3 A 285 THR ALA PHE ALA LEU PHE THR LYS ASN GLN ARG GLN TRP SEQRES 4 A 285 ARG ALA ALA PRO LEU THR THR GLN THR ILE ASP GLU PHE SEQRES 5 A 285 LYS ALA ALA CYS GLU LYS TYR HIS TYR THR SER ALA GLN SEQRES 6 A 285 ILE LEU PRO HIS ASP SER TYR LEU ILE ASN LEU GLY HIS SEQRES 7 A 285 PRO VAL THR GLU ALA LEU GLU LYS SER ARG ASP ALA PHE SEQRES 8 A 285 ILE ASP GLU MET GLN ARG CYS GLU GLN LEU GLY LEU SER SEQRES 9 A 285 LEU LEU ASN PHE HIS PRO GLY SER HIS LEU MET GLN ILE SEQRES 10 A 285 SER GLU GLU ASP CYS LEU ALA ARG ILE ALA GLU SER ILE SEQRES 11 A 285 ASN ILE ALA LEU ASP LYS THR GLN GLY VAL THR ALA VAL SEQRES 12 A 285 ILE GLU ASN THR ALA GLY GLN GLY SER ASN LEU GLY PHE SEQRES 13 A 285 LYS PHE GLU HIS LEU ALA ALA ILE ILE ASP GLY VAL GLU SEQRES 14 A 285 ASP LYS SER ARG VAL GLY VAL CYS ILE ASP THR CYS HIS SEQRES 15 A 285 ALA PHE ALA ALA GLY TYR ASP LEU ARG THR PRO ALA GLU SEQRES 16 A 285 CYS GLU LYS THR PHE ALA ASP PHE ALA ARG THR VAL GLY SEQRES 17 A 285 PHE LYS TYR LEU ARG GLY MET HIS LEU ASN ASP ALA LYS SEQRES 18 A 285 SER THR PHE GLY SER ARG VAL ASP ARG HIS HIS SER LEU SEQRES 19 A 285 GLY GLU GLY ASN ILE GLY HIS ASP ALA PHE ARG TRP ILE SEQRES 20 A 285 MET GLN ASP ASP ARG PHE ASP GLY ILE PRO LEU ILE LEU SEQRES 21 A 285 GLU THR ILE ASN PRO ASP ILE TRP ALA GLU GLU ILE ALA SEQRES 22 A 285 TRP LEU LYS ALA GLN GLN THR GLU LYS ALA VAL ALA HET ZN A 301 1 HET ZN A 302 1 HET ZN A 303 1 HETNAM ZN ZINC ION FORMUL 2 ZN 3(ZN 2+) FORMUL 5 HOH *367(H2 O) HELIX 1 1 GLY A 13 ILE A 24 1 12 HELIX 2 2 THR A 45 TYR A 59 1 15 HELIX 3 3 THR A 62 GLN A 65 5 4 HELIX 4 4 VAL A 80 LEU A 101 1 22 HELIX 5 5 SER A 118 THR A 137 1 20 HELIX 6 6 LYS A 157 VAL A 168 1 12 HELIX 7 7 ASP A 170 SER A 172 5 3 HELIX 8 8 THR A 180 GLY A 187 1 8 HELIX 9 9 THR A 192 VAL A 207 1 16 HELIX 10 10 GLY A 208 LYS A 210 5 3 HELIX 11 11 HIS A 241 GLN A 249 1 9 HELIX 12 12 ASP A 250 ASP A 254 5 5 HELIX 13 13 ASN A 264 ASP A 266 5 3 HELIX 14 14 ILE A 267 GLN A 279 1 13 SHEET 1 A 7 ALA A 28 ALA A 30 0 SHEET 2 A 7 TYR A 3 HIS A 7 1 O ILE A 4 N ALA A 28 SHEET 3 A 7 PRO A 257 LEU A 260 1 O LEU A 258 N GLY A 5 SHEET 4 A 7 LEU A 212 LEU A 217 1 O MET A 215 N ILE A 259 SHEET 5 A 7 VAL A 174 ASP A 179 1 O VAL A 176 N ARG A 213 SHEET 6 A 7 THR A 141 GLU A 145 1 O ALA A 142 N GLY A 175 SHEET 7 A 7 LEU A 105 PHE A 108 1 O LEU A 106 N VAL A 143 SHEET 1 B 2 ASP A 219 ALA A 220 0 SHEET 2 B 2 HIS A 231 HIS A 232 -1 O HIS A 232 N ASP A 219 LINK NE2 HIS A 69 ZN ZN A 301 1555 1555 2.01 LINK NE2 HIS A 109 ZN ZN A 301 1555 1555 1.98 LINK OE2 GLU A 145 ZN ZN A 301 1555 1555 2.07 LINK OE1 GLU A 145 ZN ZN A 303 1555 1555 2.11 LINK OD1 ASP A 179 ZN ZN A 303 1555 1555 1.98 LINK NE2 HIS A 182 ZN ZN A 302 1555 1555 2.00 LINK ND1 HIS A 216 ZN ZN A 303 1555 1555 2.07 LINK OD1 ASP A 229 ZN ZN A 302 1555 1555 2.19 LINK OD2 ASP A 229 ZN ZN A 302 1555 1555 2.34 LINK NE2 HIS A 231 ZN ZN A 302 1555 1555 1.98 LINK OE1 GLU A 261 ZN ZN A 303 1555 1555 2.21 LINK ZN ZN A 301 O HOH A1001 1555 1555 1.92 LINK ZN ZN A 302 O HOH A1002 1555 1555 2.01 LINK ZN ZN A 302 O HOH A1246 1555 1555 2.39 LINK ZN ZN A 303 O HOH A1001 1555 1555 2.00 SITE 1 AC1 5 HIS A 69 HIS A 109 GLU A 145 ZN A 303 SITE 2 AC1 5 HOH A1001 SITE 1 AC2 5 HIS A 182 ASP A 229 HIS A 231 HOH A1002 SITE 2 AC2 5 HOH A1246 SITE 1 AC3 7 GLU A 145 ASP A 179 HIS A 182 HIS A 216 SITE 2 AC3 7 GLU A 261 ZN A 301 HOH A1001 CRYST1 49.620 59.560 50.980 90.00 110.94 90.00 P 1 21 1 2 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 0.020153 0.000000 0.007712 0.00000 SCALE2 0.000000 0.016790 0.000000 0.00000 SCALE3 0.000000 0.000000 0.021003 0.00000