HEADER HYDROLASE(PHOSPHORIC DIESTER) 14-FEB-94 1ENA TITLE CRYSTAL STRUCTURES OF THE BINARY CA2+ AND PDTP COMPLEXES AND THE TITLE 2 TERNARY COMPLEX OF THE ASP 21->GLU MUTANT OF STAPHYLOCOCCAL NUCLEASE. TITLE 3 IMPLICATIONS FOR CATALYSIS AND LIGAND BINDING COMPND MOL_ID: 1; COMPND 2 MOLECULE: STAPHYLOCOCCAL NUCLEASE; COMPND 3 CHAIN: A; COMPND 4 EC: 3.1.31.1; COMPND 5 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: STAPHYLOCOCCUS AUREUS; SOURCE 3 ORGANISM_TAXID: 1280 KEYWDS HYDROLASE(PHOSPHORIC DIESTER) EXPDTA X-RAY DIFFRACTION AUTHOR A.LIBSON,A.GITTIS,E.E.LATTMAN REVDAT 6 07-FEB-24 1ENA 1 REMARK SEQADV LINK REVDAT 5 14-AUG-19 1ENA 1 REMARK REVDAT 4 17-JUL-19 1ENA 1 REMARK REVDAT 3 29-NOV-17 1ENA 1 HELIX REVDAT 2 24-FEB-09 1ENA 1 VERSN REVDAT 1 31-MAY-94 1ENA 0 JRNL AUTH A.M.LIBSON,A.G.GITTIS,E.E.LATTMAN JRNL TITL CRYSTAL STRUCTURES OF THE BINARY CA2+ AND PDTP COMPLEXES AND JRNL TITL 2 THE TERNARY COMPLEX OF THE ASP21-->GLU MUTANT OF JRNL TITL 3 STAPHYLOCOCCAL NUCLEASE. IMPLICATIONS FOR CATALYSIS AND JRNL TITL 4 LIGAND BINDING. JRNL REF BIOCHEMISTRY V. 33 8007 1994 JRNL REFN ISSN 0006-2960 JRNL PMID 8025105 JRNL DOI 10.1021/BI00192A004 REMARK 2 REMARK 2 RESOLUTION. 2.15 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) : 2.15 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : NULL REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 COMPLETENESS FOR RANGE (%) : NULL REMARK 3 NUMBER OF REFLECTIONS : NULL 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) : 0.225 REMARK 3 R VALUE (WORKING SET) : 0.225 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 : 1084 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 1 REMARK 3 SOLVENT ATOMS : 34 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) : NULL ; 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: NULL REMARK 4 REMARK 4 1ENA 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_1000173088. 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 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 FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL REMARK 200 SOFTWARE USED: X-PLOR REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 46.46 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.30 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: NULL REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 41 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 -Y,X,Z+1/4 REMARK 290 4555 Y,-X,Z+3/4 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 31.70000 REMARK 290 SMTRY1 3 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 15.85000 REMARK 290 SMTRY1 4 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY2 4 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 4 0.000000 0.000000 1.000000 47.55000 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 400 REMARK 400 COMPOUND REMARK 400 ASP 21 IS LIGAND OF ACTIVE SITE CA2+ IN THE WILD TYPE REMARK 400 STRUCTURE. THE D21E MUTANT STILL BINDS CA2+, BUT MOVES REMARK 400 THE METAL ION 1.5 ANGSTROMS OUT OF THE ACTIVE SITE POCKET. REMARK 400 IN THE BINARY METAL COMPLEX, CA2+ IS 0.5 ANGSTROMS LOWER REMARK 400 IN THE POCKET (TOWARD THR 41). GLU 43 IS AN INNER SPHERE REMARK 400 LIGAND OF CA2+. ARG 35 IS FOUND IN A DIFFERENT ORIENTATION REMARK 400 THAN FOUND IN MOST NUCLEASE STRUCTURES. 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 8 NE2 HIS A 8 CD2 -0.067 REMARK 500 ARG A 35 CZ ARG A 35 NH1 0.098 REMARK 500 HIS A 46 NE2 HIS A 46 CD2 -0.076 REMARK 500 HIS A 121 NE2 HIS A 121 CD2 -0.079 REMARK 500 HIS A 124 NE2 HIS A 124 CD2 -0.074 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 14 CA - CB - CG ANGL. DEV. = 21.6 DEGREES REMARK 500 ARG A 35 NE - CZ - NH2 ANGL. DEV. = -7.1 DEGREES REMARK 500 LEU A 37 CA - CB - CG ANGL. DEV. = 14.0 DEGREES REMARK 500 HIS A 46 CB - CG - CD2 ANGL. DEV. = -9.6 DEGREES REMARK 500 LYS A 78 CA - C - N ANGL. DEV. = 13.3 DEGREES REMARK 500 ARG A 81 NE - CZ - NH1 ANGL. DEV. = 6.0 DEGREES REMARK 500 ARG A 81 NE - CZ - NH2 ANGL. DEV. = -6.0 DEGREES REMARK 500 ARG A 87 NE - CZ - NH1 ANGL. DEV. = 8.6 DEGREES REMARK 500 ARG A 87 NE - CZ - NH2 ANGL. DEV. = -11.0 DEGREES REMARK 500 LEU A 103 CA - CB - CG ANGL. DEV. = 17.7 DEGREES REMARK 500 TYR A 113 CB - CG - CD1 ANGL. DEV. = -3.7 DEGREES REMARK 500 ARG A 126 NE - CZ - NH1 ANGL. DEV. = 6.9 DEGREES REMARK 500 ARG A 126 NE - CZ - NH2 ANGL. DEV. = -3.2 DEGREES REMARK 500 TRP A 140 CD1 - CG - CD2 ANGL. DEV. = 6.6 DEGREES REMARK 500 TRP A 140 CG - CD1 - NE1 ANGL. DEV. = -6.6 DEGREES REMARK 500 TRP A 140 CE2 - CD2 - CG ANGL. DEV. = -5.2 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 49 -52.18 178.83 REMARK 500 TYR A 54 -4.19 85.18 REMARK 500 ASN A 119 18.76 -157.87 REMARK 500 ASN A 138 -89.55 48.61 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: PLANAR GROUPS REMARK 500 REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS REMARK 500 AN RMSD GREATER THAN THIS VALUE REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 M RES CSSEQI RMS TYPE REMARK 500 TYR A 91 0.06 SIDE CHAIN 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 CA A 142 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLU A 21 OE1 REMARK 620 2 GLU A 21 OE2 47.7 REMARK 620 3 ASP A 40 OD1 81.6 110.8 REMARK 620 4 THR A 41 O 85.2 122.3 87.8 REMARK 620 5 GLU A 43 OE2 116.4 102.7 145.2 65.9 REMARK 620 N 1 2 3 4 REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: CA REMARK 800 EVIDENCE_CODE: AUTHOR REMARK 800 SITE_DESCRIPTION: THE BINDING SITE FOR THE CALCIUM ION REMARK 800 REMARK 800 SITE_IDENTIFIER: ACT REMARK 800 EVIDENCE_CODE: AUTHOR REMARK 800 SITE_DESCRIPTION: THE ACTIVE SITE REMARK 800 REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA A 142 REMARK 999 REMARK 999 SEQUENCE REMARK 999 SEQUENCE ADVISORY NOTICE REMARK 999 SWISS-PROT PDB SEQRES COMMENT REMARK 999 CONFLICT ASP 103 GLU 21 MUTATION SITE DBREF 1ENA A 7 141 UNP P00644 NUC_STAAU 89 223 SEQADV 1ENA GLU A 21 UNP P00644 ASP 103 CONFLICT SEQRES 1 A 135 LEU HIS LYS GLU PRO ALA THR LEU ILE LYS ALA ILE ASP SEQRES 2 A 135 GLY GLU THR VAL LYS LEU MET TYR LYS GLY GLN PRO MET SEQRES 3 A 135 THR PHE ARG LEU LEU LEU VAL ASP THR PRO GLU THR LYS SEQRES 4 A 135 HIS PRO LYS LYS GLY VAL GLU LYS TYR GLY PRO GLU ALA SEQRES 5 A 135 SER ALA PHE THR LYS LYS MET VAL GLU ASN ALA LYS LYS SEQRES 6 A 135 ILE GLU VAL GLU PHE ASP LYS GLY GLN ARG THR ASP LYS SEQRES 7 A 135 TYR GLY ARG GLY LEU ALA TYR ILE TYR ALA ASP GLY LYS SEQRES 8 A 135 MET VAL ASN GLU ALA LEU VAL ARG GLN GLY LEU ALA LYS SEQRES 9 A 135 VAL ALA TYR VAL TYR LYS PRO ASN ASN THR HIS GLU GLN SEQRES 10 A 135 HIS LEU ARG LYS SER GLU ALA GLN ALA LYS LYS GLU LYS SEQRES 11 A 135 LEU ASN ILE TRP SER HET CA A 142 1 HETNAM CA CALCIUM ION FORMUL 2 CA CA 2+ FORMUL 3 HOH *34(H2 O) HELIX 1 H1 TYR A 54 ASN A 68 1 15 HELIX 2 H2 MET A 98 GLN A 106 1 9 HELIX 3 H3 HIS A 121 GLU A 135 1 15 SHEET 1 S1 3 LEU A 7 GLU A 10 0 SHEET 2 S1 3 LYS A 71 GLU A 75 -1 O VAL A 74 N GLU A 10 SHEET 3 S1 3 TYR A 91 ASP A 95 -1 O TYR A 93 N GLU A 73 SHEET 1 S2 3 THR A 13 ASP A 19 0 SHEET 2 S2 3 GLU A 21 TYR A 27 -1 O THR A 22 N ILE A 18 SHEET 3 S2 3 GLY A 29 ARG A 35 -1 O PHE A 34 N VAL A 23 LINK OE1 GLU A 21 CA CA A 142 1555 1555 2.65 LINK OE2 GLU A 21 CA CA A 142 1555 1555 2.75 LINK OD1 ASP A 40 CA CA A 142 1555 1555 2.38 LINK O THR A 41 CA CA A 142 1555 1555 2.40 LINK OE2 GLU A 43 CA CA A 142 1555 1555 2.55 CISPEP 1 LYS A 116 PRO A 117 0 -0.97 SITE 1 CA 4 GLU A 21 ASP A 40 THR A 41 GLU A 43 SITE 1 ACT 3 ARG A 35 GLU A 43 ARG A 87 SITE 1 AC1 4 GLU A 21 ASP A 40 THR A 41 GLU A 43 CRYST1 47.290 47.290 63.400 90.00 90.00 90.00 P 41 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 0.021146 0.000000 0.000000 0.00000 SCALE2 0.000000 0.021146 0.000000 0.00000 SCALE3 0.000000 0.000000 0.015773 0.00000