1VKQ - Header Asymmetric Unit

HEADER HYDROLASE 12-JUN-04 1VKQ

TITLE A RE-DETERMINATION OF THE STRUCTURE OF THE TRIPLE MUTANT TITLE 2 (K53,56,120M) OF PHOSPHOLIPASE A2 AT 1.6A RESOLUTION USING TITLE 3 SULPHUR-SAS AT 1.54A WAVELENGTH

COMPND MOL_ID: 1; COMPND 2 MOLECULE: PHOSPHOLIPASE A2; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: PHOSPHATIDYLCHOLINE 2-ACYLHYDROLASE, GROUP IB COMPND 5 PHOSPHOLIPASE A2; COMPND 6 EC: 3.1.1.4; COMPND 7 ENGINEERED: YES; COMPND 8 MUTATION: YES

SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: BOS TAURUS; SOURCE 3 ORGANISM_COMMON: CATTLE; SOURCE 4 ORGANISM_TAXID: 9913; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 7 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 8 EXPRESSION_SYSTEM_PLASMID: PTO-A2MBL21

KEYWDS ALPHA HELIX, BETA SHEET, TRIPLE MUTANT, CALCIUM ION, KEYWDS 2 HYDROLASE

EXPDTA X-RAY DIFFRACTION

AUTHOR K.SEKAR,D.VELMURUGAN,V.RAJAKANNAN,T.YAMANE,M.DAUTER,Z.DAUTER

REVDAT 2 24-FEB-09 1VKQ 1 VERSN REVDAT 1 31-AUG-04 1VKQ 0

JRNL AUTH K.SEKAR,V.RAJAKANNAN,D.VELMURUGAN,T.YAMANE, JRNL AUTH 2 R.THIRUMURUGAN,M.DAUTER,Z.DAUTER JRNL TITL A REDETERMINATION OF THE STRUCTURE OF THE TRIPLE JRNL TITL 2 MUTANT (K53,56,120M) OF PHOSPHOLIPASE A2 AT 1.6 A JRNL TITL 3 RESOLUTION USING SULFUR-SAS AT 1.54 A WAVELENGTH. JRNL REF ACTA CRYSTALLOGR.,SECT.D V. 60 1586 2004 JRNL REFN ISSN 0907-4449 JRNL PMID 15333929 JRNL DOI 10.1107/S090744490401697X

REMARK 1

REMARK 2 REMARK 2 RESOLUTION. 1.60 ANGSTROMS.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.1.24 REMARK 3 AUTHORS : MURSHUDOV,VAGIN,DODSON REMARK 3 REMARK 3 REFINEMENT TARGET : MAXIMUM LIKELIHOOD REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.60 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 19.96 REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 COMPLETENESS FOR RANGE (%) : 99.7 REMARK 3 NUMBER OF REFLECTIONS : 16184 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) : 0.179 REMARK 3 R VALUE (WORKING SET) : 0.177 REMARK 3 FREE R VALUE : 0.217 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.000 REMARK 3 FREE R VALUE TEST SET COUNT : 860 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) : 1.60 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.64 REMARK 3 REFLECTION IN BIN (WORKING SET) : 1171 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 BIN R VALUE (WORKING SET) : 0.2990 REMARK 3 BIN FREE R VALUE SET COUNT : 56 REMARK 3 BIN FREE R VALUE : 0.3130 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 954 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 2 REMARK 3 SOLVENT ATOMS : 189 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 24.46 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : -0.02000 REMARK 3 B22 (A**2) : -0.02000 REMARK 3 B33 (A**2) : 0.03000 REMARK 3 B12 (A**2) : -0.01000 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): 0.091 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.094 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.049 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 1.360 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.963 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.943 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 1001 ; 0.011 ; 0.021 REMARK 3 BOND LENGTHS OTHERS (A): NULL ; NULL ; NULL REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 1359 ; 1.536 ; 1.975 REMARK 3 BOND ANGLES OTHERS (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 1 (DEGREES): 122 ; 5.620 ; 5.000 REMARK 3 TORSION ANGLES, PERIOD 2 (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 3 (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 4 (DEGREES): NULL ; NULL ; NULL REMARK 3 CHIRAL-CENTER RESTRAINTS (A**3): 141 ; 0.097 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 760 ; 0.006 ; 0.020 REMARK 3 GENERAL PLANES OTHERS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED CONTACTS REFINED ATOMS (A): 475 ; 0.203 ; 0.200 REMARK 3 NON-BONDED CONTACTS OTHERS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED TORSION REFINED ATOMS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED TORSION OTHERS (A): NULL ; NULL ; NULL REMARK 3 H-BOND (X...Y) REFINED ATOMS (A): 121 ; 0.173 ; 0.200 REMARK 3 H-BOND (X...Y) OTHERS (A): NULL ; NULL ; NULL REMARK 3 POTENTIAL METAL-ION REFINED ATOMS (A): 3 ; 0.087 ; 0.200 REMARK 3 POTENTIAL METAL-ION OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY VDW REFINED ATOMS (A): 47 ; 0.227 ; 0.200 REMARK 3 SYMMETRY VDW OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY H-BOND REFINED ATOMS (A): 23 ; 0.123 ; 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): 614 ; 0.880 ; 1.500 REMARK 3 MAIN-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE REFINED ATOMS (A**2): 986 ; 1.671 ; 2.000 REMARK 3 SIDE-CHAIN BOND REFINED ATOMS (A**2): 387 ; 2.569 ; 3.000 REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): 373 ; 4.071 ; 4.500 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 : BABINET MODEL WITH MASK REMARK 3 PARAMETERS FOR MASK CALCULATION REMARK 3 VDW PROBE RADIUS : 1.40 REMARK 3 ION PROBE RADIUS : 0.80 REMARK 3 SHRINKAGE RADIUS : 0.80 REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL

REMARK 4 REMARK 4 1VKQ COMPLIES WITH FORMAT V. 3.15, 01-DEC-08

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 10-JUL-04. REMARK 100 THE RCSB ID CODE IS RCSB001959.

REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : NULL REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 7.2 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : NSLS REMARK 200 BEAMLINE : X9A REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.54 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : MARRESEARCH REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 17048 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.600 REMARK 200 RESOLUTION RANGE LOW (A) : 19.960 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : NULL REMARK 200 DATA REDUNDANCY : 12.100 REMARK 200 R MERGE (I) : 0.05900 REMARK 200 R SYM (I) : NULL REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 50.1000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.60 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.66 REMARK 200 COMPLETENESS FOR SHELL (%) : 3188.0 REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : 0.28400 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: SULPHUR-SAS 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 (%): 45.32 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.25 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 50 MM TRIS BUFFER, 70% MPD REMARK 280 RESERVOIR,17-20MG/ML PROT,5 MM CACL2 AND 60% MPD IN THE REMARK 280 DROPLET, PH 7.2, VAPOR DIFFUSION METHOD, TEMPERATURE 293.0K

REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 31 2 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -Y,X-Y,Z+1/3 REMARK 290 3555 -X+Y,-X,Z+2/3 REMARK 290 4555 Y,X,-Z REMARK 290 5555 X-Y,-Y,-Z+2/3 REMARK 290 6555 -X,-X+Y,-Z+1/3 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 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 2 0.866025 -0.500000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 33.86000 REMARK 290 SMTRY1 3 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 3 -0.866025 -0.500000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 67.72000 REMARK 290 SMTRY1 4 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 4 0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 4 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 5 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 5 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 5 0.000000 0.000000 -1.000000 67.72000 REMARK 290 SMTRY1 6 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 6 -0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 6 0.000000 0.000000 -1.000000 33.86000 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 O4 MPD A 228 O HOH A 265 2.16 REMARK 500 O HOH A 352 O HOH A 390 2.19 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 ASP A 66 CB - CG - OD2 ANGL. DEV. = 5.6 DEGREES REMARK 500 ASP A 99 CB - CG - OD2 ANGL. DEV. = 5.8 DEGREES REMARK 500 LYS A 108 CG - CD - CE ANGL. DEV. = 24.7 DEGREES REMARK 500 REMARK 500 REMARK: NULL

REMARK 525 REMARK 525 SOLVENT REMARK 525 REMARK 525 THE SOLVENT MOLECULES HAVE CHAIN IDENTIFIERS THAT REMARK 525 INDICATE THE POLYMER CHAIN WITH WHICH THEY ARE MOST REMARK 525 CLOSELY ASSOCIATED. THE REMARK LISTS ALL THE SOLVENT REMARK 525 MOLECULES WHICH ARE MORE THAN 5A AWAY FROM THE REMARK 525 NEAREST POLYMER CHAIN (M = MODEL NUMBER; REMARK 525 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE REMARK 525 NUMBER; I=INSERTION CODE): REMARK 525 REMARK 525 M RES CSSEQI REMARK 525 HOH A 381 DISTANCE = 7.44 ANGSTROMS REMARK 525 HOH A 387 DISTANCE = 9.37 ANGSTROMS

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 224 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP A 49 OD1 REMARK 620 2 ASP A 49 OD2 52.1 REMARK 620 3 HOH A 245 O 76.0 125.0 REMARK 620 4 TYR A 28 O 105.6 94.9 81.4 REMARK 620 5 HOH A 248 O 77.6 89.0 97.2 176.0 REMARK 620 6 GLY A 32 O 131.2 82.6 152.2 93.9 85.5 REMARK 620 7 GLY A 30 O 142.1 161.4 73.3 91.2 84.8 79.5 REMARK 620 N 1 2 3 4 5 6

REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA A 224 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CL A 225 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MPD A 226 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MPD A 227 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MPD A 228

DBREF 1VKQ A 1 123 UNP P00593 PA21B_BOVIN 23 145

SEQADV 1VKQ MET A 53 UNP P00593 LYS 75 ENGINEERED SEQADV 1VKQ MET A 56 UNP P00593 LYS 78 ENGINEERED SEQADV 1VKQ MET A 120 UNP P00593 LYS 142 ENGINEERED

SEQRES 1 A 123 ALA LEU TRP GLN PHE ASN GLY MET ILE LYS CYS LYS ILE SEQRES 2 A 123 PRO SER SER GLU PRO LEU LEU ASP PHE ASN ASN TYR GLY SEQRES 3 A 123 CYS TYR CYS GLY LEU GLY GLY SER GLY THR PRO VAL ASP SEQRES 4 A 123 ASP LEU ASP ARG CYS CYS GLN THR HIS ASP ASN CYS TYR SEQRES 5 A 123 MET GLN ALA MET LYS LEU ASP SER CYS LYS VAL LEU VAL SEQRES 6 A 123 ASP ASN PRO TYR THR ASN ASN TYR SER TYR SER CYS SER SEQRES 7 A 123 ASN ASN GLU ILE THR CYS SER SER GLU ASN ASN ALA CYS SEQRES 8 A 123 GLU ALA PHE ILE CYS ASN CYS ASP ARG ASN ALA ALA ILE SEQRES 9 A 123 CYS PHE SER LYS VAL PRO TYR ASN LYS GLU HIS LYS ASN SEQRES 10 A 123 LEU ASP MET LYS ASN CYS

HET CA A 224 1 HET CL A 225 1 HET MPD A 226 8 HET MPD A 227 8 HET MPD A 228 8

HETNAM CA CALCIUM ION HETNAM CL CHLORIDE ION HETNAM MPD (4S)-2-METHYL-2,4-PENTANEDIOL

FORMUL 2 CA CA 2+ FORMUL 3 CL CL 1- FORMUL 4 MPD 3(C6 H14 O2) FORMUL 7 HOH *165(H2 O)

HELIX 1 1 ALA A 1 ILE A 13 1 13 HELIX 2 2 GLU A 17 PHE A 22 1 6 HELIX 3 3 ASP A 39 LEU A 58 1 20 HELIX 4 4 ASN A 89 LYS A 108 1 20 HELIX 5 5 ASN A 112 LYS A 116 5 5 HELIX 6 6 ASP A 119 CYS A 123 5 5

SHEET 1 A 2 TYR A 75 SER A 78 0 SHEET 2 A 2 GLU A 81 CYS A 84 -1 O THR A 83 N SER A 76

SSBOND 1 CYS A 11 CYS A 77 1555 1555 2.04 SSBOND 2 CYS A 27 CYS A 123 1555 1555 2.04 SSBOND 3 CYS A 29 CYS A 45 1555 1555 2.05 SSBOND 4 CYS A 44 CYS A 105 1555 1555 2.03 SSBOND 5 CYS A 51 CYS A 98 1555 1555 2.04 SSBOND 6 CYS A 61 CYS A 91 1555 1555 2.04 SSBOND 7 CYS A 84 CYS A 96 1555 1555 2.03

LINK CA CA A 224 OD1 ASP A 49 1555 1555 2.49 LINK CA CA A 224 OD2 ASP A 49 1555 1555 2.44 LINK CA CA A 224 O HOH A 245 1555 1555 2.52 LINK CA CA A 224 O TYR A 28 1555 1555 2.33 LINK CA CA A 224 O HOH A 248 1555 1555 2.55 LINK CA CA A 224 O GLY A 32 1555 1555 2.32 LINK CA CA A 224 O GLY A 30 1555 1555 2.35

SITE 1 AC1 6 TYR A 28 GLY A 30 GLY A 32 ASP A 49 SITE 2 AC1 6 HOH A 245 HOH A 248 SITE 1 AC2 4 LYS A 12 ILE A 82 ILE A 104 HOH A 332 SITE 1 AC3 4 PHE A 5 PHE A 22 GLY A 30 HOH A 245 SITE 1 AC4 2 LEU A 19 LYS A 108 SITE 1 AC5 5 SER A 15 ASP A 21 GLN A 54 PHE A 94 SITE 2 AC5 5 HOH A 265

CRYST1 46.050 46.050 101.580 90.00 90.00 120.00 P 31 2 1 6

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 0.021716 0.012537 0.000000 0.00000

SCALE2 0.000000 0.025075 0.000000 0.00000

SCALE3 0.000000 0.000000 0.009844 0.00000