PDB Short entry for 1HCB HEADER LYASE(OXO-ACID) 07-JAN-94 1HCB TITLE ENZYME-SUBSTRATE INTERACTIONS: STRUCTURE OF HUMAN CARBONIC ANHYDRASE I TITLE 2 COMPLEXED WITH BICARBONATE COMPND MOL_ID: 1; COMPND 2 MOLECULE: CARBONIC ANHYDRASE I; COMPND 3 CHAIN: A; COMPND 4 EC: 4.2.1.1; COMPND 5 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606 KEYWDS LYASE(OXO-ACID) EXPDTA X-RAY DIFFRACTION AUTHOR V.KUMAR,K.K.KANNAN REVDAT 4 07-FEB-24 1HCB 1 REMARK LINK REVDAT 3 29-NOV-17 1HCB 1 HELIX REVDAT 2 24-FEB-09 1HCB 1 VERSN REVDAT 1 30-APR-94 1HCB 0 JRNL AUTH V.KUMAR,K.K.KANNAN JRNL TITL ENZYME-SUBSTRATE INTERACTIONS. STRUCTURE OF HUMAN CARBONIC JRNL TITL 2 ANHYDRASE I COMPLEXED WITH BICARBONATE. JRNL REF J.MOL.BIOL. V. 241 226 1994 JRNL REFN ISSN 0022-2836 JRNL PMID 8057362 JRNL DOI 10.1006/JMBI.1994.1491 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH V.KUMAR,K.K.KANNAN REMARK 1 TITL STRUCTURE OF HUMAN CARBONIC ANHYDRASE I COMPLEXED WITH GOLD REMARK 1 TITL 2 CYANIDE INHIBITOR: INHIBITION MECHANISM REMARK 1 REF ACTA CRYSTALLOGR.,SECT.A V. 49 92 1993 REMARK 1 REFN ISSN 0108-7673 REMARK 1 REFERENCE 2 REMARK 1 AUTH V.KUMAR,P.SATYAMURTHY,K.K.KANNAN REMARK 1 TITL HUMAN CARBONIC ANHYDRASE I-IODIDE COMPLEX: STRUCTURE AND REMARK 1 TITL 2 INHIBITION MECHANISM REMARK 1 REF ACTA CRYSTALLOGR.,SECT.A V. 43 C-23 1987 REMARK 1 REFN ISSN 0108-7673 REMARK 2 REMARK 2 RESOLUTION. 1.60 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : PROLSQ REMARK 3 AUTHORS : KONNERT,HENDRICKSON REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.60 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 10.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 COMPLETENESS FOR RANGE (%) : NULL REMARK 3 NUMBER OF REFLECTIONS : 24976 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : NULL REMARK 3 R VALUE (WORKING + TEST SET) : 0.177 REMARK 3 R VALUE (WORKING SET) : NULL REMARK 3 FREE R VALUE : NULL REMARK 3 FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 FREE R VALUE TEST SET COUNT : NULL REMARK 3 REMARK 3 FIT/AGREEMENT OF MODEL WITH ALL DATA. REMARK 3 R VALUE (WORKING + TEST SET, NO CUTOFF) : NULL REMARK 3 R VALUE (WORKING SET, NO CUTOFF) : NULL REMARK 3 FREE R VALUE (NO CUTOFF) : NULL REMARK 3 FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : NULL REMARK 3 FREE R VALUE TEST SET COUNT (NO CUTOFF) : NULL REMARK 3 TOTAL NUMBER OF REFLECTIONS (NO CUTOFF) : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2023 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 5 REMARK 3 SOLVENT ATOMS : 254 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 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 DISTANCE RESTRAINTS. RMS SIGMA REMARK 3 BOND LENGTH (A) : 0.020 ; NULL REMARK 3 ANGLE DISTANCE (A) : NULL ; NULL REMARK 3 INTRAPLANAR 1-4 DISTANCE (A) : NULL ; NULL REMARK 3 H-BOND OR METAL COORDINATION (A) : NULL ; NULL REMARK 3 REMARK 3 PLANE RESTRAINT (A) : NULL ; NULL REMARK 3 CHIRAL-CENTER RESTRAINT (A**3) : NULL ; NULL REMARK 3 REMARK 3 NON-BONDED CONTACT RESTRAINTS. REMARK 3 SINGLE TORSION (A) : NULL ; NULL REMARK 3 MULTIPLE TORSION (A) : NULL ; NULL REMARK 3 H-BOND (X...Y) (A) : NULL ; NULL REMARK 3 H-BOND (X-H...Y) (A) : NULL ; NULL REMARK 3 REMARK 3 CONFORMATIONAL TORSION ANGLE RESTRAINTS. REMARK 3 SPECIFIED (DEGREES) : NULL ; NULL REMARK 3 PLANAR (DEGREES) : NULL ; NULL REMARK 3 STAGGERED (DEGREES) : NULL ; NULL REMARK 3 TRANSVERSE (DEGREES) : NULL ; NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: REMARK 3 THE SIDE CHAINS OF RESIDUES ASP 4, ASP 9, LYS 10, LEU 19 REMARK 3 AND LYS149 SHOW VERY POOR ELECTRON DENSITY IN THE REMARK 3 FOURIER MAPS. REMARK 4 REMARK 4 1HCB COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY BNL. REMARK 100 THE DEPOSITION ID IS D_1000173772. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : NULL REMARK 200 TEMPERATURE (KELVIN) : NULL REMARK 200 PH : NULL REMARK 200 NUMBER OF CRYSTALS USED : NULL REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : NULL REMARK 200 RADIATION SOURCE : NULL REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : NULL REMARK 200 WAVELENGTH OR RANGE (A) : NULL REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : NULL REMARK 200 DETECTOR MANUFACTURER : NULL REMARK 200 INTENSITY-INTEGRATION SOFTWARE : NULL REMARK 200 DATA SCALING SOFTWARE : NULL REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : NULL REMARK 200 RESOLUTION RANGE HIGH (A) : NULL REMARK 200 RESOLUTION RANGE LOW (A) : NULL REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : NULL REMARK 200 DATA REDUNDANCY : NULL REMARK 200 R MERGE (I) : NULL 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) : NULL REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : NULL REMARK 200 COMPLETENESS FOR SHELL (%) : NULL REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL REMARK 200 SOFTWARE USED: NULL REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 39.14 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.02 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: NULL 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 40.92500 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 18.88000 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 37.65500 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 18.88000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 40.92500 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 37.65500 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 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 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 ALA A 1 REMARK 465 SER A 2 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 ASP A 9 CB - CG - OD1 ANGL. DEV. = 6.0 DEGREES REMARK 500 LYS A 39 CA - CB - CG ANGL. DEV. = 15.4 DEGREES REMARK 500 ASP A 41 CB - CG - OD1 ANGL. DEV. = 10.3 DEGREES REMARK 500 ASP A 41 CB - CG - OD2 ANGL. DEV. = -5.7 DEGREES REMARK 500 ASP A 86 CB - CG - OD2 ANGL. DEV. = -9.4 DEGREES REMARK 500 ARG A 89 NE - CZ - NH1 ANGL. DEV. = 3.1 DEGREES REMARK 500 GLU A 102 OE1 - CD - OE2 ANGL. DEV. = 7.5 DEGREES REMARK 500 ASP A 110 CB - CG - OD2 ANGL. DEV. = -9.5 DEGREES REMARK 500 TYR A 114 CB - CG - CD2 ANGL. DEV. = -5.4 DEGREES REMARK 500 TYR A 114 CB - CG - CD1 ANGL. DEV. = 5.0 DEGREES REMARK 500 ASP A 139 CB - CG - OD1 ANGL. DEV. = 6.8 DEGREES REMARK 500 ASP A 162 CB - CG - OD2 ANGL. DEV. = -8.7 DEGREES REMARK 500 ASP A 180 CB - CG - OD2 ANGL. DEV. = -7.3 DEGREES REMARK 500 ASP A 190 OD1 - CG - OD2 ANGL. DEV. = -14.4 DEGREES REMARK 500 ASP A 190 CB - CG - OD1 ANGL. DEV. = 6.3 DEGREES REMARK 500 ASP A 190 CB - CG - OD2 ANGL. DEV. = 8.0 DEGREES REMARK 500 ARG A 227 NE - CZ - NH1 ANGL. DEV. = 5.0 DEGREES REMARK 500 ARG A 227 NE - CZ - NH2 ANGL. DEV. = -10.2 DEGREES REMARK 500 ARG A 254 NE - CZ - NH1 ANGL. DEV. = 3.9 DEGREES REMARK 500 ARG A 254 NE - CZ - NH2 ANGL. DEV. = -4.9 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 LYS A 57 -61.83 -120.34 REMARK 500 ASN A 75 32.98 -99.96 REMARK 500 GLU A 106 -66.09 -91.94 REMARK 500 ASN A 244 33.48 -153.87 REMARK 500 REMARK 500 REMARK: NULL REMARK 600 REMARK 600 HETEROGEN REMARK 600 REMARK 600 ATOM O HOH 520 (PARTIAL OCCUPANCY) MAKES SHORT CONTACT WITH REMARK 600 522 HCO GROUP AND MAY BE THE PARTIALLY OVERLAPPING BINDING REMARK 600 SITE OF THE HET 522 HCO GROUP. REMARK 600 REMARK 600 HOH 521 O ATOM IS PARTIALLY OCCUPIED SOLVENT, OVERLAPPING REMARK 600 WITH O1 ATOM OF 522 HCO GROUP. REMARK 600 REMARK 600 HET ATOM ZN2 IS ESSENTIAL METAL ION. REMARK 600 REMARK 600 HET RESIDUE HCO IS BICARBONATE ANION, SUBSTRATE FOR THE REMARK 600 REVERSE REACTION CATALYZED BY CARBONIC ANHYDRASE REMARK 600 ISOENZYMES. 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 261 ZN REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS A 94 NE2 REMARK 620 2 HIS A 96 NE2 106.6 REMARK 620 3 HIS A 119 ND1 108.3 95.8 REMARK 620 4 HOH A 520 O 62.0 168.5 89.1 REMARK 620 5 HOH A 521 O 116.6 96.6 127.2 88.6 REMARK 620 6 BCT A 522 O1 117.7 112.2 113.9 74.9 18.3 REMARK 620 N 1 2 3 4 5 REMARK 700 REMARK 700 SHEET REMARK 700 THIS STRUCTURE CONTAINS A BIFURCATED SHEET. THIS IS REMARK 700 REPRESENTED BY PRESENTING TWO SHEETS ON *SHEET* RECORDS REMARK 700 BELOW. STRAND 5 IS DIFFERENT IN SHEETS S1A AND S1B. REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: CAT REMARK 800 EVIDENCE_CODE: AUTHOR REMARK 800 SITE_DESCRIPTION: CATALYTIC ACTIVE SITE OF THE ENZYME. SUBSTRATE REMARK 800 BICARBONATE ANION BINDS IN THE POCKET DEFINED BY THESE RESIDUES REMARK 800 AND IS A DONOR OF A H-BOND TO OG1 THR 199 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ZN A 261 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BCT A 522 REMARK 999 REMARK 999 SEQUENCE REMARK 999 ON THE BASIS OF THE PRESENT COMPLEX STRUCTURE THE REMARK 999 FOLLOWING SEQUENCE MODIFICATION IN THE NATIVE HUMAN REMARK 999 CARBONIC ANHYDRASE ATOMIC MODEL (PDB IDENT CODE 2CAB, REMARK 999 VERSION OF 10/84) HAVE BEEN MADE IN THE SUBMITTED ATOMIC REMARK 999 MODEL. REMARK 999 REMARK 999 SEQUENCE NUMBER 74 75 REMARK 999 RESIDUE TYPE ASP ASN REMARK 999 REMARK 999 THESE CHANGES ARE CONSISTENT WITH THE KNOWN CHEMICAL REMARK 999 SEQUENCE OF HUMAN CARBONIC ANHYDRASE I ENZYME. DBREF 1HCB A 1 260 UNP P00915 CAH1_HUMAN 1 260 SEQRES 1 A 260 ALA SER PRO ASP TRP GLY TYR ASP ASP LYS ASN GLY PRO SEQRES 2 A 260 GLU GLN TRP SER LYS LEU TYR PRO ILE ALA ASN GLY ASN SEQRES 3 A 260 ASN GLN SER PRO VAL ASP ILE LYS THR SER GLU THR LYS SEQRES 4 A 260 HIS ASP THR SER LEU LYS PRO ILE SER VAL SER TYR ASN SEQRES 5 A 260 PRO ALA THR ALA LYS GLU ILE ILE ASN VAL GLY HIS SER SEQRES 6 A 260 PHE HIS VAL ASN PHE GLU ASP ASN ASP ASN ARG SER VAL SEQRES 7 A 260 LEU LYS GLY GLY PRO PHE SER ASP SER TYR ARG LEU PHE SEQRES 8 A 260 GLN PHE HIS PHE HIS TRP GLY SER THR ASN GLU HIS GLY SEQRES 9 A 260 SER GLU HIS THR VAL ASP GLY VAL LYS TYR SER ALA GLU SEQRES 10 A 260 LEU HIS VAL ALA HIS TRP ASN SER ALA LYS TYR SER SER SEQRES 11 A 260 LEU ALA GLU ALA ALA SER LYS ALA ASP GLY LEU ALA VAL SEQRES 12 A 260 ILE GLY VAL LEU MET LYS VAL GLY GLU ALA ASN PRO LYS SEQRES 13 A 260 LEU GLN LYS VAL LEU ASP ALA LEU GLN ALA ILE LYS THR SEQRES 14 A 260 LYS GLY LYS ARG ALA PRO PHE THR ASN PHE ASP PRO SER SEQRES 15 A 260 THR LEU LEU PRO SER SER LEU ASP PHE TRP THR TYR PRO SEQRES 16 A 260 GLY SER LEU THR HIS PRO PRO LEU TYR GLU SER VAL THR SEQRES 17 A 260 TRP ILE ILE CYS LYS GLU SER ILE SER VAL SER SER GLU SEQRES 18 A 260 GLN LEU ALA GLN PHE ARG SER LEU LEU SER ASN VAL GLU SEQRES 19 A 260 GLY ASP ASN ALA VAL PRO MET GLN HIS ASN ASN ARG PRO SEQRES 20 A 260 THR GLN PRO LEU LYS GLY ARG THR VAL ARG ALA SER PHE HET ZN A 261 1 HET BCT A 522 4 HETNAM ZN ZINC ION HETNAM BCT BICARBONATE ION FORMUL 2 ZN ZN 2+ FORMUL 3 BCT C H O3 1- FORMUL 4 HOH *254(H2 O) HELIX 1 HA PRO A 13 LYS A 18 5 6 HELIX 2 HB PRO A 21 ASN A 24 5 4 HELIX 3 HC PRO A 53 THR A 55 5 3 HELIX 4 HD LEU A 131 ALA A 134 1 4 HELIX 5 HE PRO A 155 LEU A 157 5 3 HELIX 6 HF GLN A 158 ASP A 162 1 5 HELIX 7 HG ALA A 163 ILE A 167 5 5 HELIX 8 HH PRO A 181 LEU A 184 5 4 HELIX 9 HI SER A 219 ARG A 227 1 9 SHEET 1 S1A10 LYS A 39 HIS A 40 0 SHEET 2 S1A10 ARG A 257 ALA A 258 1 SHEET 3 S1A10 PHE A 191 GLY A 196 -1 SHEET 4 S1A10 VAL A 207 CYS A 212 -1 SHEET 5 S1A10 LEU A 141 VAL A 150 1 SHEET 6 S1A10 ALA A 116 TRP A 123 -1 SHEET 7 S1A10 TYR A 88 TRP A 97 -1 SHEET 8 S1A10 PHE A 66 PHE A 70 -1 SHEET 9 S1A10 ALA A 56 ASN A 61 -1 SHEET 10 S1A10 ARG A 173 PRO A 175 -1 SHEET 1 S1B10 LYS A 39 HIS A 40 0 SHEET 2 S1B10 ARG A 257 ALA A 258 1 SHEET 3 S1B10 PHE A 191 GLY A 196 -1 SHEET 4 S1B10 ILE A 216 VAL A 218 -1 SHEET 5 S1B10 LEU A 141 VAL A 150 1 SHEET 6 S1B10 ALA A 116 TRP A 123 -1 SHEET 7 S1B10 TYR A 88 TRP A 97 -1 SHEET 8 S1B10 PHE A 66 PHE A 70 -1 SHEET 9 S1B10 ALA A 56 ASN A 61 -1 SHEET 10 S1B10 ARG A 173 PRO A 175 -1 SHEET 1 SH2 3 ILE A 47 SER A 50 0 SHEET 2 SH2 3 VAL A 78 GLY A 81 -1 SHEET 3 SH2 3 TYR A 88 TRP A 97 -1 LINK NE2 HIS A 94 ZN ZN A 261 1555 1555 2.02 LINK NE2 HIS A 96 ZN ZN A 261 1555 1555 2.13 LINK ND1 HIS A 119 ZN ZN A 261 1555 1555 1.94 LINK ZN ZN A 261 O HOH A 520 1555 1555 2.76 LINK ZN ZN A 261 O HOH A 521 1555 1555 1.80 LINK ZN ZN A 261 O1 BCT A 522 1555 1555 1.78 CISPEP 1 SER A 29 PRO A 30 0 -1.89 CISPEP 2 PRO A 201 PRO A 202 0 9.60 SITE 1 CAT 10 HIS A 94 HIS A 96 HIS A 119 ALA A 121 SITE 2 CAT 10 VAL A 143 LEU A 198 THR A 199 VAL A 207 SITE 3 CAT 10 TRP A 209 ZN A 261 SITE 1 AC1 6 HIS A 94 HIS A 96 HIS A 119 HOH A 520 SITE 2 AC1 6 HOH A 521 BCT A 522 SITE 1 AC2 10 HIS A 94 HIS A 96 HIS A 119 LEU A 198 SITE 2 AC2 10 THR A 199 TRP A 209 ZN A 261 HOH A 361 SITE 3 AC2 10 HOH A 520 HOH A 521 CRYST1 81.850 75.310 37.760 90.00 90.00 90.00 P 21 21 21 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 0.012217 0.000000 0.000000 0.00000 SCALE2 0.000000 0.013278 0.000000 0.00000 SCALE3 0.000000 0.000000 0.026483 0.00000