HEADER NEUROTOXIN 25-JUN-97 3ERA TITLE RECOMBINANT ERABUTOXIN A (S8T MUTANT) COMPND MOL_ID: 1; COMPND 2 MOLECULE: ERABUTOXIN A; COMPND 3 CHAIN: A, B; COMPND 4 ENGINEERED: YES; COMPND 5 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: LATICAUDA SEMIFASCIATA; SOURCE 3 ORGANISM_COMMON: BROAD-BANDED BLUE SEA KRAIT; SOURCE 4 ORGANISM_TAXID: 8631; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 7 EXPRESSION_SYSTEM_STRAIN: HB 101; SOURCE 8 EXPRESSION_SYSTEM_PLASMID: PEZZ 18 KEYWDS SNAKE NEUROTOXIN, VENOM, POSTSYNAPTIC NEUROTOXIN, NEUROTOXIN EXPDTA X-RAY DIFFRACTION AUTHOR J.F.GAUCHER,R.MENEZ,B.ARNOUX,A.MENEZ,A.DUCRUIX REVDAT 5 03-APR-24 3ERA 1 REMARK REVDAT 4 03-NOV-21 3ERA 1 REMARK SEQADV REVDAT 3 24-FEB-09 3ERA 1 VERSN REVDAT 2 01-APR-03 3ERA 1 JRNL REVDAT 1 31-DEC-97 3ERA 0 JRNL AUTH J.F.GAUCHER,R.MENEZ,B.ARNOUX,A.MENEZ,A.DUCRUIX JRNL TITL HIGH RESOLUTION X-RAY ANALYSIS OF TWO MUTANTS OF A JRNL TITL 2 CURAREMIMETIC SNAKE TOXIN JRNL REF EUR.J.BIOCHEM. V. 267 1323 2000 JRNL REFN ISSN 0014-2956 JRNL PMID 10691969 JRNL DOI 10.1046/J.1432-1327.2000.01099.X REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH O.TREMEAU,C.LEMAIRE,P.DREVET,S.PINKASFELD,F.DUCANCEL, REMARK 1 AUTH 2 J.C.BOULAIN,A.MENEZ REMARK 1 TITL GENETIC ENGINEERING OF SNAKE TOXINS. THE FUNCTIONAL SITE OF REMARK 1 TITL 2 ERABUTOXIN A, AS DELINEATED BY SITE-DIRECTED MUTAGENESIS, REMARK 1 TITL 3 INCLUDES VARIANT RESIDUES REMARK 1 REF J.BIOL.CHEM. V. 270 9362 1995 REMARK 1 REFN ISSN 0021-9258 REMARK 1 REFERENCE 2 REMARK 1 AUTH L.PILLET,O.TREMEAU,F.DUCANCEL,P.DREVET,S.ZINN-JUSTIN, REMARK 1 AUTH 2 S.PINKASFELD,J.C.BOULAIN,A.MENEZ REMARK 1 TITL GENETIC ENGINEERING OF SNAKE TOXINS. ROLE OF INVARIANT REMARK 1 TITL 2 RESIDUES IN THE STRUCTURAL AND FUNCTIONAL PROPERTIES OF A REMARK 1 TITL 3 CURAREMIMETIC TOXIN, AS PROBED BY SITE-DIRECTED MUTAGENESIS REMARK 1 REF J.BIOL.CHEM. V. 268 909 1993 REMARK 1 REFN ISSN 0021-9258 REMARK 1 REFERENCE 3 REMARK 1 AUTH P.SALUDJIAN,T.PRANGE,J.NAVAZA,R.MENEZ,J.P.GUILLOTEAU, REMARK 1 AUTH 2 M.RIES-KAUTT,A.DUCRUIX REMARK 1 TITL STRUCTURE DETERMINATION OF A DIMERIC FORM OF ERABUTOXIN-B, REMARK 1 TITL 2 CRYSTALLIZED FROM THIOCYANATE SOLUTION REMARK 1 REF ACTA CRYSTALLOGR.,SECT.B V. 48 520 1992 REMARK 1 REFN ISSN 0108-7681 REMARK 1 REFERENCE 4 REMARK 1 AUTH P.W.CORFIELD,T.J.LEE,B.W.LOW REMARK 1 TITL THE CRYSTAL STRUCTURE OF ERABUTOXIN A AT 2.0-A RESOLUTION REMARK 1 REF J.BIOL.CHEM. V. 264 9239 1989 REMARK 1 REFN ISSN 0021-9258 REMARK 1 REFERENCE 5 REMARK 1 AUTH J.L.SMITH,P.W.R.CORFIELD,W.A.HENDRICKSON,B.W.LOW REMARK 1 TITL REFINEMENT AT 1.4 A RESOLUTION OF A MODEL OF ERABUTOXIN B: REMARK 1 TITL 2 TREATMENT OF ORDERED SOLVENT AND DISCRETE DISORDER REMARK 1 REF ACTA CRYSTALLOGR.,SECT.A V. 44 357 1988 REMARK 1 REFN ISSN 0108-7673 REMARK 2 REMARK 2 RESOLUTION. 1.70 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR 3.1 REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.70 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 10.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 2.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 100000.000 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 96.9 REMARK 3 NUMBER OF REFLECTIONS : 12566 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 SET) : 0.179 REMARK 3 FREE R VALUE : 0.224 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 9.900 REMARK 3 FREE R VALUE TEST SET COUNT : 1243 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : 0.006 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 8 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 1.70 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.78 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 97.80 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 1248 REMARK 3 BIN R VALUE (WORKING SET) : 0.2400 REMARK 3 BIN FREE R VALUE : 0.2510 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 9.10 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 125 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.020 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 948 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 9 REMARK 3 SOLVENT ATOMS : 116 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 12.60 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 15.60 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) : 0.18 REMARK 3 ESD FROM SIGMAA (A) : 0.17 REMARK 3 LOW RESOLUTION CUTOFF (A) : 10.0 REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : 0.25 REMARK 3 ESD FROM C-V SIGMAA (A) : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.006 REMARK 3 BOND ANGLES (DEGREES) : 1.590 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 25.95 REMARK 3 IMPROPER ANGLES (DEGREES) : 1.290 REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : RESTRAINED REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : 1.500 ; NULL REMARK 3 MAIN-CHAIN ANGLE (A**2) : 2.000 ; NULL REMARK 3 SIDE-CHAIN BOND (A**2) : 2.000 ; NULL REMARK 3 SIDE-CHAIN ANGLE (A**2) : 2.500 ; NULL REMARK 3 REMARK 3 NCS MODEL : NULL REMARK 3 REMARK 3 NCS RESTRAINTS. RMS SIGMA/WEIGHT REMARK 3 GROUP 1 POSITIONAL (A) : NULL ; NULL REMARK 3 GROUP 1 B-FACTOR (A**2) : NULL ; NULL REMARK 3 REMARK 3 PARAMETER FILE 1 : PARHCSDX.PRO REMARK 3 PARAMETER FILE 2 : PARAM11.WAT REMARK 3 PARAMETER FILE 3 : NULL REMARK 3 TOPOLOGY FILE 1 : TOPHCSDX.PRO REMARK 3 TOPOLOGY FILE 2 : TOPH11.WAT REMARK 3 TOPOLOGY FILE 3 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: AT THE END OF REFINEMENT RFREE DATA SET REMARK 3 WAS COMBINED WITH OTHER DATA FOR THE LAST STEP OF REFINEMENT. REMARK 4 REMARK 4 3ERA 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_1000178953. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : JUL-95 REMARK 200 TEMPERATURE (KELVIN) : 278 REMARK 200 PH : 4.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : LURE REMARK 200 BEAMLINE : DW32 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.901 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : MIRRORS REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : MARRESEARCH REMARK 200 INTENSITY-INTEGRATION SOFTWARE : MOSFLM, ROTAVATA AGROVATA REMARK 200 DATA SCALING SOFTWARE : CCP4 (AGROVATA, ROTAVATA REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 13459 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.700 REMARK 200 RESOLUTION RANGE LOW (A) : 13.900 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.4 REMARK 200 DATA REDUNDANCY : 3.400 REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : 0.06900 REMARK 200 FOR THE DATA SET : 9.7000 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) : 1.79 REMARK 200 COMPLETENESS FOR SHELL (%) : 99.7 REMARK 200 DATA REDUNDANCY IN SHELL : 3.20 REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : 0.29000 REMARK 200 FOR SHELL : 2.500 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REMARK 200 SOFTWARE USED: X-PLOR 3.1 REMARK 200 STARTING MODEL: STRUCTURE OF RECOMBINANT ERABUTOXIN A (S8G MUTANT) REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 47.00 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.20 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: CRYSTALLIZATION WERE PERFORMED AT 291K REMARK 280 BY THE HANGING DROP METHOD. DROPS OF 2 MICROLITRE OF 0.007M REMARK 280 PROTEIN AND 2 MICROLITRE OF RESERVOIR WERE EQUILIBRATED AGAINST REMARK 280 0.32M NASCN, 0.05M NAOAC BUFFER SOLUTION (PH 4.5), VAPOR REMARK 280 DIFFUSION - HANGING DROP, VAPOR DIFFUSION, HANGING DROP 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 27.70900 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 20.23350 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 26.50650 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 20.23350 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 27.70900 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 26.50650 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: DIMERIC 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 480 REMARK 480 ZERO OCCUPANCY ATOM REMARK 480 THE FOLLOWING RESIDUES HAVE ATOMS MODELED WITH ZERO REMARK 480 OCCUPANCY. THE LOCATION AND PROPERTIES OF THESE ATOMS REMARK 480 MAY NOT BE RELIABLE. (M=MODEL NUMBER; RES=RESIDUE NAME; REMARK 480 C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE): REMARK 480 M RES C SSEQI ATOMS REMARK 480 LYS A 47 CE NZ REMARK 480 LYS A 51 CE NZ REMARK 480 LYS B 15 CE NZ 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 THR A 8 -112.25 37.18 REMARK 500 VAL A 59 48.35 37.33 REMARK 500 ASN A 61 39.10 -97.51 REMARK 500 THR B 8 -117.89 39.28 REMARK 500 ASP B 31 -155.69 -147.06 REMARK 500 VAL B 59 47.42 36.33 REMARK 500 ASN B 61 33.12 -95.17 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 SCN B 101 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SCN B 102 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SCN A 103 DBREF 3ERA A 1 62 UNP P60775 NXSA_LATSE 22 83 DBREF 3ERA B 1 62 UNP P60775 NXSA_LATSE 22 83 SEQADV 3ERA THR A 8 UNP P60775 SER 29 ENGINEERED MUTATION SEQADV 3ERA THR B 8 UNP P60775 SER 29 ENGINEERED MUTATION SEQRES 1 A 62 ARG ILE CYS PHE ASN HIS GLN THR SER GLN PRO GLN THR SEQRES 2 A 62 THR LYS THR CYS SER PRO GLY GLU SER SER CYS TYR ASN SEQRES 3 A 62 LYS GLN TRP SER ASP PHE ARG GLY THR ILE ILE GLU ARG SEQRES 4 A 62 GLY CYS GLY CYS PRO THR VAL LYS PRO GLY ILE LYS LEU SEQRES 5 A 62 SER CYS CYS GLU SER GLU VAL CYS ASN ASN SEQRES 1 B 62 ARG ILE CYS PHE ASN HIS GLN THR SER GLN PRO GLN THR SEQRES 2 B 62 THR LYS THR CYS SER PRO GLY GLU SER SER CYS TYR ASN SEQRES 3 B 62 LYS GLN TRP SER ASP PHE ARG GLY THR ILE ILE GLU ARG SEQRES 4 B 62 GLY CYS GLY CYS PRO THR VAL LYS PRO GLY ILE LYS LEU SEQRES 5 B 62 SER CYS CYS GLU SER GLU VAL CYS ASN ASN HET SCN A 103 3 HET SCN B 101 3 HET SCN B 102 3 HETNAM SCN THIOCYANATE ION FORMUL 3 SCN 3(C N S 1-) FORMUL 6 HOH *116(H2 O) SHEET 1 A 2 ARG A 1 ASN A 5 0 SHEET 2 A 2 THR A 13 CYS A 17 -1 N LYS A 15 O CYS A 3 SHEET 1 B 3 GLY A 34 CYS A 41 0 SHEET 2 B 3 SER A 23 ASP A 31 -1 N ASP A 31 O GLY A 34 SHEET 3 B 3 ILE A 50 CYS A 55 -1 N CYS A 55 O CYS A 24 SHEET 1 C 2 ARG B 1 ASN B 5 0 SHEET 2 C 2 THR B 13 CYS B 17 -1 N LYS B 15 O CYS B 3 SHEET 1 D 3 GLY B 34 CYS B 41 0 SHEET 2 D 3 SER B 23 ASP B 31 -1 N ASP B 31 O GLY B 34 SHEET 3 D 3 ILE B 50 CYS B 55 -1 N CYS B 55 O CYS B 24 SSBOND 1 CYS A 3 CYS A 24 1555 1555 2.02 SSBOND 2 CYS A 17 CYS A 41 1555 1555 2.02 SSBOND 3 CYS A 43 CYS A 54 1555 1555 2.02 SSBOND 4 CYS A 55 CYS A 60 1555 1555 2.04 SSBOND 5 CYS B 3 CYS B 24 1555 1555 2.02 SSBOND 6 CYS B 17 CYS B 41 1555 1555 2.02 SSBOND 7 CYS B 43 CYS B 54 1555 1555 2.02 SSBOND 8 CYS B 55 CYS B 60 1555 1555 2.03 SITE 1 AC1 4 ARG A 33 CYS A 54 SER B 23 CYS B 54 SITE 1 AC2 6 SER A 18 PRO A 19 GLY A 20 ARG B 33 SITE 2 AC2 6 THR B 45 LYS B 47 SITE 1 AC3 5 ASN A 26 SER A 53 CYS A 55 HOH A 246 SITE 2 AC3 5 SER B 53 CRYST1 55.418 53.013 40.467 90.00 90.00 90.00 P 21 21 21 8 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 0.018045 0.000000 0.000000 0.00000 SCALE2 0.000000 0.018863 0.000000 0.00000 SCALE3 0.000000 0.000000 0.024711 0.00000 MTRIX1 1 -0.999750 -0.003670 0.022040 47.12906 1 MTRIX2 1 0.019520 0.336210 0.941580 25.64156 1 MTRIX3 1 -0.010870 0.941780 -0.336060 -36.72058 1