HEADER TOXIN 10-SEP-15 5DO6 TITLE CRYSTAL STRUCTURE OF DENDROASPIS POLYLEPIS VENOM MAMBALGIN-1 T23A TITLE 2 MUTANT COMPND MOL_ID: 1; COMPND 2 MOLECULE: MAMBALGIN-1; COMPND 3 CHAIN: A, B; COMPND 4 FRAGMENT: UNP RESIDUES 22-78; COMPND 5 SYNONYM: MAMB-1,PI-DP1; COMPND 6 ENGINEERED: YES; COMPND 7 MUTATION: YES; COMPND 8 OTHER_DETAILS: MAMBALGIN-1 T23A MUTANT SOURCE MOL_ID: 1; SOURCE 2 SYNTHETIC: YES; SOURCE 3 ORGANISM_SCIENTIFIC: DENDROASPIS POLYLEPIS POLYLEPIS; SOURCE 4 ORGANISM_COMMON: BLACK MAMBA; SOURCE 5 ORGANISM_TAXID: 8620; SOURCE 6 OTHER_DETAILS: T23A MUTANT KEYWDS TOXIN, ACID SENSING ION CHANNELS, PAIN SUPPRESSION DRUG, ELAPID VENOM KEYWDS 2 POLYPEPTIDE EXPDTA X-RAY DIFFRACTION AUTHOR E.A.STURA,L.TEPSHI,P.KESSLER,M.GILLES,D.SERVENT REVDAT 4 23-OCT-24 5DO6 1 REMARK REVDAT 3 25-JAN-17 5DO6 1 JRNL REVDAT 2 17-FEB-16 5DO6 1 JRNL REVDAT 1 30-DEC-15 5DO6 0 JRNL AUTH G.MOURIER,M.SALINAS,P.KESSLER,E.A.STURA,M.LEBLANC,L.TEPSHI, JRNL AUTH 2 T.BESSON,S.DIOCHOT,A.BARON,D.DOUGUET,E.LINGUEGLIA,D.SERVENT JRNL TITL MAMBALGIN-1 PAIN-RELIEVING PEPTIDE, STEPWISE SOLID-PHASE JRNL TITL 2 SYNTHESIS, CRYSTAL STRUCTURE, AND FUNCTIONAL DOMAIN FOR JRNL TITL 3 ACID-SENSING ION CHANNEL 1A INHIBITION. JRNL REF J.BIOL.CHEM. V. 291 2616 2016 JRNL REFN ESSN 1083-351X JRNL PMID 26680001 JRNL DOI 10.1074/JBC.M115.702373 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH I.POLSINELLI,M.SAVKO,C.ROUANET-MEHOUAS,L.CICCONE,S.NENCETTI, REMARK 1 AUTH 2 E.ORLANDINI,E.A.STURA,W.SHEPARD REMARK 1 TITL COMPARISON OF HELICAL SCAN AND STANDARD ROTATION METHODS IN REMARK 1 TITL 2 SINGLE-CRYSTAL X-RAY DATA COLLECTION STRATEGIES. REMARK 1 REF J SYNCHROTRON RADIAT V. 24 42 2017 REMARK 1 REFN ESSN 1600-5775 REMARK 1 PMID 28009545 REMARK 1 DOI 10.1107/S1600577516018488 REMARK 2 REMARK 2 RESOLUTION. 1.70 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : PHENIX 1.9_1692 REMARK 3 AUTHORS : PAUL ADAMS,PAVEL AFONINE,VINCENT CHEN,IAN REMARK 3 : DAVIS,KRESHNA GOPAL,RALF GROSSE-KUNSTLEVE, REMARK 3 : LI-WEI HUNG,ROBERT IMMORMINO,TOM IOERGER, REMARK 3 : AIRLIE MCCOY,ERIK MCKEE,NIGEL MORIARTY, REMARK 3 : REETAL PAI,RANDY READ,JANE RICHARDSON, REMARK 3 : DAVID RICHARDSON,TOD ROMO,JIM SACCHETTINI, REMARK 3 : NICHOLAS SAUTER,JACOB SMITH,LAURENT REMARK 3 : STORONI,TOM TERWILLIGER,PETER ZWART REMARK 3 REMARK 3 REFINEMENT TARGET : ML REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.70 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 27.95 REMARK 3 MIN(FOBS/SIGMA_FOBS) : 1.380 REMARK 3 COMPLETENESS FOR RANGE (%) : 97.7 REMARK 3 NUMBER OF REFLECTIONS : 16719 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 R VALUE (WORKING + TEST SET) : 0.173 REMARK 3 R VALUE (WORKING SET) : 0.172 REMARK 3 FREE R VALUE : 0.205 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.010 REMARK 3 FREE R VALUE TEST SET COUNT : 837 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT (IN BINS). REMARK 3 BIN RESOLUTION RANGE COMPL. NWORK NFREE RWORK RFREE REMARK 3 1 27.9538 - 3.0833 1.00 2822 149 0.1686 0.1788 REMARK 3 2 3.0833 - 2.4478 1.00 2725 144 0.1741 0.2270 REMARK 3 3 2.4478 - 2.1385 1.00 2683 141 0.1651 0.1961 REMARK 3 4 2.1385 - 1.9430 1.00 2700 142 0.1611 0.2185 REMARK 3 5 1.9430 - 1.8038 1.00 2650 139 0.1829 0.2376 REMARK 3 6 1.8038 - 1.6974 0.87 2302 122 0.2042 0.2524 REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : FLAT BULK SOLVENT MODEL REMARK 3 SOLVENT RADIUS : 1.11 REMARK 3 SHRINKAGE RADIUS : 0.90 REMARK 3 K_SOL : NULL REMARK 3 B_SOL : NULL REMARK 3 REMARK 3 ERROR ESTIMATES. REMARK 3 COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED) : 0.160 REMARK 3 PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : 21.250 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 TWINNING INFORMATION. REMARK 3 FRACTION: NULL REMARK 3 OPERATOR: NULL REMARK 3 REMARK 3 DEVIATIONS FROM IDEAL VALUES. REMARK 3 RMSD COUNT REMARK 3 BOND : 0.006 1033 REMARK 3 ANGLE : 1.017 1382 REMARK 3 CHIRALITY : 0.043 142 REMARK 3 PLANARITY : 0.005 187 REMARK 3 DIHEDRAL : 12.350 406 REMARK 3 REMARK 3 TLS DETAILS REMARK 3 NUMBER OF TLS GROUPS : NULL REMARK 3 REMARK 3 NCS DETAILS REMARK 3 NUMBER OF NCS GROUPS : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 5DO6 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 10-SEP-15. REMARK 100 THE DEPOSITION ID IS D_1000213518. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 03-JUN-15 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 5.5 - 7.6 REMARK 200 NUMBER OF CRYSTALS USED : NULL REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : SOLEIL REMARK 200 BEAMLINE : PROXIMA 2 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.9801 REMARK 200 MONOCHROMATOR : [111] SI CUT MONOCHROMATOR REMARK 200 OPTICS : X-RAY CENTERING - HELICAL SCAN REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 315 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : XDS REMARK 200 DATA SCALING SOFTWARE : XSCALE REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 31543 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.697 REMARK 200 RESOLUTION RANGE LOW (A) : 37.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : -3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 97.5 REMARK 200 DATA REDUNDANCY : 7.100 REMARK 200 R MERGE (I) : 0.06100 REMARK 200 R SYM (I) : 0.05700 REMARK 200 FOR THE DATA SET : 21.8300 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.70 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.74 REMARK 200 COMPLETENESS FOR SHELL (%) : 78.7 REMARK 200 DATA REDUNDANCY IN SHELL : 4.80 REMARK 200 R MERGE FOR SHELL (I) : 0.40800 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : 4.640 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: SAD REMARK 200 SOFTWARE USED: PHENIX AUTOSOL REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: PRISMATIC CRYSTALS REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 57.34 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.88 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PROTEIN: REDISSOLVED FROM LYOPHILIZED REMARK 280 AT 5MG/ML MAMB-1-T23A IN 50MM NA ACETATE, PH 5.5. PRECIPITANT: REMARK 280 21.6% PEG600, 3.6% PEG 20K 0.18M MIXED L-MALIC ACID, MES, TRIS REMARK 280 (PH4) AND MIXED SODIUM MALONATE, IMIDAZOLE, BORIC ACID(PH10) IN REMARK 280 THE RATIO 40:60. CRYOPROTECTANT: 30% MPEG 550, 40% CRYOPROTX REMARK 280 CRYOMIX9, 10% NAAC PH 6.5, 0.1M POTASSIUM IODIDE SOAKED FOR 1 REMARK 280 MIN., PH 7.6, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 293K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 2 2 21 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 -X,Y,-Z+1/2 REMARK 290 4555 X,-Y,-Z REMARK 290 5555 X+1/2,Y+1/2,Z REMARK 290 6555 -X+1/2,-Y+1/2,Z+1/2 REMARK 290 7555 -X+1/2,Y+1/2,-Z+1/2 REMARK 290 8555 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 0.00000 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 26.74000 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 26.74000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 4 0.000000 -1.000000 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 27.95000 REMARK 290 SMTRY2 5 0.000000 1.000000 0.000000 50.49500 REMARK 290 SMTRY3 5 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 6 -1.000000 0.000000 0.000000 27.95000 REMARK 290 SMTRY2 6 0.000000 -1.000000 0.000000 50.49500 REMARK 290 SMTRY3 6 0.000000 0.000000 1.000000 26.74000 REMARK 290 SMTRY1 7 -1.000000 0.000000 0.000000 27.95000 REMARK 290 SMTRY2 7 0.000000 1.000000 0.000000 50.49500 REMARK 290 SMTRY3 7 0.000000 0.000000 -1.000000 26.74000 REMARK 290 SMTRY1 8 1.000000 0.000000 0.000000 27.95000 REMARK 290 SMTRY2 8 0.000000 -1.000000 0.000000 50.49500 REMARK 290 SMTRY3 8 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: TETRAMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 6410 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 12520 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -27.0 KCAL/MOL REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B 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 BIOMT1 2 -1.000000 0.000000 0.000000 55.90000 REMARK 350 BIOMT2 2 0.000000 1.000000 0.000000 0.00000 REMARK 350 BIOMT3 2 0.000000 0.000000 -1.000000 26.74000 REMARK 375 REMARK 375 SPECIAL POSITION REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL REMARK 375 POSITIONS. REMARK 375 REMARK 375 ATOM RES CSSEQI REMARK 375 HOH A 266 LIES ON A SPECIAL POSITION. REMARK 375 HOH B 239 LIES ON A SPECIAL POSITION. 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 OG1 THR B 44 O HOH B 201 2.16 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 ASN B 56 33.38 -96.69 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 IOD A 101 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue IOD A 103 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue IOD A 104 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue EDO A 105 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue IOD B 101 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC6 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: binding site for residue PGO B 102 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 2MJY RELATED DB: PDB REMARK 900 NMR STRUCTURE OF THE WILD-TYPE MAMBALGIN-1 REMARK 900 RELATED ID: 2MFA RELATED DB: PDB REMARK 900 NMR STRUCTURE OF MAMBALGIN-2. RELATED TO MAMBALGIN 1 (Y4F). DBREF 5DO6 A 1 57 UNP P0DKR6 3SX1_DENPO 22 78 DBREF 5DO6 B 1 57 UNP P0DKR6 3SX1_DENPO 22 78 SEQADV 5DO6 ALA A 23 UNP P0DKR6 THR 44 ENGINEERED MUTATION SEQADV 5DO6 ALA B 23 UNP P0DKR6 THR 44 ENGINEERED MUTATION SEQRES 1 A 57 LEU LYS CYS TYR GLN HIS GLY LYS VAL VAL THR CYS HIS SEQRES 2 A 57 ARG ASP MET LYS PHE CYS TYR HIS ASN ALA GLY MET PRO SEQRES 3 A 57 PHE ARG ASN LEU LYS LEU ILE LEU GLN GLY CYS SER SER SEQRES 4 A 57 SER CYS SER GLU THR GLU ASN ASN LYS CYS CYS SER THR SEQRES 5 A 57 ASP ARG CYS ASN LYS SEQRES 1 B 57 LEU LYS CYS TYR GLN HIS GLY LYS VAL VAL THR CYS HIS SEQRES 2 B 57 ARG ASP MET LYS PHE CYS TYR HIS ASN ALA GLY MET PRO SEQRES 3 B 57 PHE ARG ASN LEU LYS LEU ILE LEU GLN GLY CYS SER SER SEQRES 4 B 57 SER CYS SER GLU THR GLU ASN ASN LYS CYS CYS SER THR SEQRES 5 B 57 ASP ARG CYS ASN LYS HET IOD A 101 1 HET IOD A 102 1 HET IOD A 103 1 HET IOD A 104 1 HET EDO A 105 4 HET IOD B 101 1 HET PGO B 102 5 HETNAM IOD IODIDE ION HETNAM EDO 1,2-ETHANEDIOL HETNAM PGO S-1,2-PROPANEDIOL HETSYN EDO ETHYLENE GLYCOL FORMUL 3 IOD 5(I 1-) FORMUL 7 EDO C2 H6 O2 FORMUL 9 PGO C3 H8 O2 FORMUL 10 HOH *165(H2 O) HELIX 1 AA1 SER A 42 ASN A 47 5 6 HELIX 2 AA2 SER B 42 ASN B 46 5 5 SHEET 1 AA1 2 LYS A 2 GLN A 5 0 SHEET 2 AA1 2 LYS A 8 THR A 11 -1 O VAL A 10 N CYS A 3 SHEET 1 AA2 6 CYS A 49 CYS A 50 0 SHEET 2 AA2 6 PHE A 18 PHE A 27 -1 N CYS A 19 O CYS A 50 SHEET 3 AA2 6 LEU A 30 SER A 38 -1 O LEU A 32 N GLY A 24 SHEET 4 AA2 6 LEU B 30 SER B 38 -1 O LYS B 31 N ILE A 33 SHEET 5 AA2 6 PHE B 18 PHE B 27 -1 N GLY B 24 O LEU B 32 SHEET 6 AA2 6 CYS B 49 CYS B 50 -1 O CYS B 50 N CYS B 19 SHEET 1 AA3 2 LYS B 2 GLN B 5 0 SHEET 2 AA3 2 LYS B 8 THR B 11 -1 O VAL B 10 N CYS B 3 SSBOND 1 CYS A 3 CYS A 19 1555 1555 2.02 SSBOND 2 CYS A 12 CYS A 37 1555 1555 2.04 SSBOND 3 CYS A 41 CYS A 49 1555 1555 2.04 SSBOND 4 CYS A 50 CYS A 55 1555 1555 2.02 SSBOND 5 CYS B 3 CYS B 19 1555 1555 2.03 SSBOND 6 CYS B 12 CYS B 37 1555 1555 2.05 SSBOND 7 CYS B 41 CYS B 49 1555 1555 2.03 SSBOND 8 CYS B 50 CYS B 55 1555 1555 2.03 SITE 1 AC1 2 LEU A 1 LEU B 1 SITE 1 AC2 1 SER A 39 SITE 1 AC3 2 THR A 44 HOH B 254 SITE 1 AC4 4 HIS A 6 GLY A 7 GLN A 35 LYS A 57 SITE 1 AC5 1 MET B 25 SITE 1 AC6 4 ARG B 14 ASP B 15 LYS B 17 HOH B 239 CRYST1 55.900 100.990 53.480 90.00 90.00 90.00 C 2 2 21 16 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 0.017889 0.000000 0.000000 0.00000 SCALE2 0.000000 0.009902 0.000000 0.00000 SCALE3 0.000000 0.000000 0.018699 0.00000