HEADER TOXIN 03-SEP-85 2EBX OBSLTE 16-APR-88 2EBX 3EBX TITLE ERABUTOXIN $B. INITIAL PROTEIN REFINEMENT AND SEQUENCE TITLE 2 ANALYSIS AT 0.140-NM RESOLUTION COMPND MOL_ID: 1; COMPND 2 MOLECULE:; COMPND 3 CHAIN: NULL; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1 KEYWDS TOXIN EXPDTA X-RAY DIFFRACTION AUTHOR P.E.BOURNE,A.SATO,P.W.R.CORFIELD,L.S.ROSEN,B.W.LOW REVDAT 4 16-APR-88 2EBX 3 OBSLTE REVDAT 3 16-JUL-87 2EBX 1 REMARK REVDAT 2 25-APR-86 2EBX 1 JRNL REVDAT 1 08-NOV-85 2EBX 0 JRNL AUTH P.E.BOURNE,A.SATO,P.W.R.CORFIELD,L.S.ROSEN, JRNL AUTH 2 S.BIRKEN,B.W.LOW JRNL TITL ERABUTOXIN B. INITIAL PROTEIN REFINEMENT AND JRNL TITL 2 SEQUENCE ANALYSIS AT 0.140-NM RESOLUTION JRNL REF EUR.J.BIOCHEM. V. 153 521 1985 JRNL REFN ASTM EJBCAI IX ISSN 0014-2956 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH B.W.LOW,P.W.R.CORFIELD REMARK 1 TITL ERABUTOXIN B. STRUCTURE(SLASH)FUNCTION REMARK 1 TITL 2 RELATIONSHIPS FOLLOWING INITIAL PROTEIN REFINEMENT REMARK 1 TITL 3 AT 0.140-NM RESOLUTION REMARK 1 REF EUR.J.BIOCHEM. V. 161 579 1986 REMARK 1 REFN ASTM EJBCAI IX ISSN 0014-2956 REMARK 1 REFERENCE 2 REMARK 1 AUTH J.DRENTH,B.W.LOW,J.S.RICHARDSON,C.S.WRIGHT REMARK 1 TITL THE TOXIN-AGGLUTININ FOLD. A NEW GROUP OF SMALL REMARK 1 TITL 2 PROTEIN STRUCTURES ORGANIZED AROUND A REMARK 1 TITL 3 FOUR-DISULFIDE CORE REMARK 1 REF J.BIOL.CHEM. V. 255 2652 1980 REMARK 1 REFN ASTM JBCHA3 US ISSN 0021-9258 REMARK 1 REFERENCE 3 REMARK 1 AUTH M.R.KIMBALL,A.SATO,J.S.RICHARDSON,L.S.ROSEN,B.W.LOW REMARK 1 TITL MOLECULAR CONFORMATION OF ERABUTOXIN B. ATOMIC REMARK 1 TITL 2 COORDINATES AT 2.5 ANGSTROMS RESOLUTION REMARK 1 REF BIOCHEM.BIOPHYS.RES.COMM. V. 88 950 1979 REMARK 1 REFN ASTM BBRCA9 US ISSN 0006-291X REMARK 1 REFERENCE 4 REMARK 1 AUTH B.W.LOW REMARK 1 TITL THE THREE-DIMENSIONAL STRUCTURE OF POSTSYNAPTIC REMARK 1 TITL 2 SNAKE NEUROTOXINS. CONSIDERATION OF STRUCTURE AND REMARK 1 TITL 3 FUNCTION REMARK 1 REF HANDB.EXP.PHARMACOL. V. 52 213 1979 REMARK 1 REFN ASTM HEPHD2 GW ISSN 0171-2004 REMARK 1 REFERENCE 5 REMARK 1 AUTH B.W.LOW,H.S.PRESTON,A.SATO,L.S.ROSEN,J.E.SEARL, REMARK 1 AUTH 2 A.D.RUDKO,J.S.RICHARDSON REMARK 1 TITL THREE DIMENSIONAL STRUCTURE OF ERABUTOXIN B REMARK 1 TITL 2 NEUROTOXIC PROTEIN. INHIBITOR OF ACETYLCHOLINE REMARK 1 TITL 3 RECEPTOR REMARK 1 REF PROC.NATL.ACAD.SCI.USA V. 73 2991 1976 REMARK 1 REFN ASTM PNASA6 US ISSN 0027-8424 REMARK 1 REFERENCE 6 REMARK 1 AUTH B.W.LOW,R.POTTER,R.B.JACKSON,N.TAMIYA,S.SATO REMARK 1 TITL X-RAY CRYSTALLOGRAPHIC STUDY OF THE ERABUTOXINS REMARK 1 TITL 2 AND OF A DIIODO DERIVATIVE REMARK 1 REF J.BIOL.CHEM. V. 246 4366 1971 REMARK 1 REFN ASTM JBCHA3 US ISSN 0021-9258 REMARK 2 REMARK 2 RESOLUTION. NULL ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : NULL REMARK 3 AUTHORS : NULL REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : NULL REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : NULL REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 DATA CUTOFF HIGH (ABS(F)) : NULL REMARK 3 DATA CUTOFF LOW (ABS(F)) : NULL REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 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 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 ESTIMATED ERROR OF FREE R VALUE : NULL REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : NULL REMARK 3 BIN RESOLUTION RANGE HIGH (A) : NULL REMARK 3 BIN RESOLUTION RANGE LOW (A) : NULL REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 REFLECTIONS IN BIN (WORKING SET) : NULL REMARK 3 BIN R VALUE (WORKING SET) : NULL REMARK 3 BIN FREE R VALUE : NULL REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 BIN FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 475 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 2 REMARK 3 SOLVENT ATOMS : 51 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 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM C-V SIGMAA (A) : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : NULL REMARK 3 BOND ANGLES (DEGREES) : NULL REMARK 3 DIHEDRAL ANGLES (DEGREES) : NULL REMARK 3 IMPROPER ANGLES (DEGREES) : NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : 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 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 : NULL REMARK 3 TOPOLOGY FILE 1 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 2EBX COMPLIES WITH FORMAT V. 2.3, 09-JULY-1998 REMARK 5 REMARK 5 2EBX ONE SEQUENCE ERROR IN BOTH ERABUTOXIN B AND THE REMARK 5 REFINED 2EBX NEUROTOXIN B STRUCTURES WAS DISCOVERED DURING REMARK 5 REFINEMENT. 2EBX THE CORRECT SEQUENCE IS HIS 6, GLN 7. A REMARK 5 FURTHER SEQUENCE 2EBX ERROR IN ERABUTOXIN B WAS CORRECTED REMARK 5 TO SER 18, PRO 19. 2EBX RESIDUE 59, ONCE CONSIDERED AS ARG REMARK 5 IN NEUROTOXIN B, WAS 2EBX SHOWN UNAMBIGUOUSLY TO HAVE THE REMARK 5 ORIGINAL ASSIGNMENT OF THE 2EBX ERABUTOXIN B CHEMICAL REMARK 5 SEQUENCE, THAT IS VAL 59. 2EBX REMARK 6 REMARK 6 2EBX REFINEMENT IS CONTINUING AND MODIFICATION TO THE REMARK 6 CURRENT 2EBX COORDINATE SET IS TO BE EXPECTED, PARTICULARLY REMARK 6 IN THE 2EBX SEGMENT OF RESIDUES 44 TO 49 AND IN SIDE-CHAIN REMARK 6 POSITIONS 2EBX WITH HIGHER THAN AVERAGE B VALUES. 2EBX REMARK 7 REMARK 7 2EBX FURTHER EXTENSIVE CRYSTALLOGRAPHIC REFINEMENT REMARK 7 INDICATES THE 2EBX PRESENCE OF MORE ORDERED WATER MOLECULES REMARK 7 THAN ARE GIVEN IN 2EBX THIS ENTRY. FIVE OF THE 51 WATER REMARK 7 MOLECULE SITES 2EBX PRESENTED IN THIS ENTRY (NUMBERS 19, REMARK 7 32, 46, 49, 51) ARE 2EBX LESS THAN 2.2 ANGSTROMS FROM REMARK 7 ANOTHER ATOM. OF THE 2EBX REMAINING 46 WATER MOLECULE REMARK 7 SITES, ALL BUT TWO (NUMBERS 50, 2EBX 52) FORM PART OF THE REMARK 7 FIRST PROTEIN SURFACE SHELL. 2EBX REMARK 8 REMARK 8 2EBX THE POSTSYNAPTIC NEUROTOXINS OF SEA SNAKE VENOM ARE REMARK 8 2EBX ANTAGONISTS OF THE ACETYLCHOLINE RECEPTOR. THE REMARK 8 HOMOLOGY 2EBX BETWEEN ALL THESE VENOM NEUROTOXINS OF BOTH REMARK 8 SHORT AND LONG 2EBX SERIES IS ACKNOWLEDGED IN SOME REMARK 8 PUBLICATIONS BY SEQUENCE 2EBX NUMBER CHANGES (SEE REFERENCE REMARK 8 3 ABOVE FOR DETAILS). 2EBX REMARK 9 REMARK 9 2EBX THE FEATURES OF THE REACTIVE SITE OF ERABUTOXIN B REMARK 9 ESTABLISH 2EBX IT AS A VALID PROTOTYPE FOR ALL THE REMARK 9 POSTSYNAPTIC 2EBX NEUROTOXINS OF THIS SNAKE VENOM SERIES. REMARK 9 SITE *RCT* BELOW 2EBX PRESENTS THE SERIES INVARIANT REMARK 9 RESIDUES OF THE REACTIVE 2EBX SITE. FIVE OF THESE RESIDUES REMARK 9 (PHE 32, ILE 36, GLU 38, ILE 2EBX 50, LEU 52) ARE TYPE- REMARK 9 CONSERVED THROUGHOUT THE SERIES. THE 2EBX ENUMERATION IS REMARK 9 FOR A 62-RESIDUE TOXIN. SITE *FNR* BELOW 2EBX PRESENTS THE REMARK 9 RESIDUES IN THE REACTIVE SITE SHOWN CHEMICALLY 2EBX TO BIND REMARK 9 DIRECTLY TO RECEPTOR. SITE *CMR* PRESENTS THE 2EBX REMARK 9 RESIDUES, INCLUDING FOUR CYSTINE LINKAGES, WHICH ARE 2EBX REMARK 9 CONFORMATION MAINTAINING. ALL RESIDUES PRESENTED ON *SITE* REMARK 9 2EBX RECORDS BELOW ARE COMMON-INVARIANT OR TYPE-CONSERVED REMARK 9 2EBX HOMOLOGOUS SERIES RESIDUES, EXCEPT GLY 42. (IN THE REMARK 9 LONG 2EBX SERIES, INVARIANT GLY 42 IS SUBSTITUTED BY REMARK 9 INVARIANT ALA, 2EBX ALA, THR.) 2EBX REMARK 10 REMARK 10 2EBX ONLY MAIN-CHAIN TO MAIN-CHAIN HYDROGEN BONDS ARE REMARK 10 PRESENTED 2EBX ON THE *CONECT* RECORDS BELOW. SALT BRIDGES, REMARK 10 MAIN-CHAIN TO 2EBX SIDE-CHAIN, SIDE-CHAIN TO SIDE-CHAIN AND REMARK 10 HYDROGEN BONDS 2EBX INVOLVING WATER MOLECULES ARE NOT REMARK 10 INCLUDED. 2EBX THE RANGE OF N-H...O DISTANCES IS 1.7 TO 3.3 REMARK 10 ANGSTROMS. 2EBX THE MEAN OF N-H...O IN BETA TURNS IS 3.15 REMARK 10 ANGSTROMS. 2EBX THE MEAN OF N-H...O NOT IN TURNS IS 2.88 REMARK 10 ANGSTROMS. 2EBX REMARK 11 REMARK 11 2EBX CORRECTION. UPDATE JRNL REFERENCE TO REFLECT REMARK 11 PUBLICATION. 2EBX 25-APR-86. 2EBX REMARK 12 REMARK 12 2EBX CORRECTION. INSERT NEW PUBLICATION AS REFERENCE 1 AND REMARK 12 2EBX RENUMBER THE OTHERS. 16-JUL-87. 2EBX REMARK 13 REMARK 13 2EBX CORRECTION. THIS ENTRY IS OBSOLETE. 16-APR-88. 2EBX 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: NULL REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 32.62 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.83 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 1/2-X,-Y,1/2+Z REMARK 290 3555 -X,1/2+Y,1/2-Z REMARK 290 4555 1/2+X,1/2-Y,-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 24.97004 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 10.65008 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 23.29048 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 10.65008 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 24.97004 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 23.29048 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 THIS ENTRY CONTAINS THE CRYSTALLOGRAPHIC ASYMMETRIC UNIT REMARK 300 WHICH CONSISTS OF 1 CHAIN(S). SEE REMARK 350 FOR REMARK 300 INFORMATION ON GENERATING THE BIOLOGICAL MOLECULE(S). REMARK 350 REMARK 350 GENERATING THE BIOMOLECULE 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 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 REMARK 500 O HOH 46 O HOH 47 1.16 REMARK 500 O HOH 18 O HOH 19 1.63 REMARK 500 O HOH 25 O HOH 51 1.66 REMARK 500 O HOH 31 O HOH 32 1.81 REMARK 500 O HOH 28 O HOH 49 1.82 REMARK 500 O ASN 62 O HOH 46 1.99 REMARK 500 CE1 PHE 4 CG2 VAL 59 2.18 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: ENGH AND HUBER, 1991 REMARK 500 REMARK 500 M RES CSSEQI ATM1 ATM2 ATM3 REMARK 500 ARG 1 CD - NE - CZ ANGL. DEV. = 42.5 DEGREES SEQRES 1 62 ARG ILE CYS PHE ASN HIS GLN SER SER GLN PRO GLN THR SEQRES 2 62 THR LYS THR CYS SER PRO GLY GLU SER SER CYS TYR HIS SEQRES 3 62 LYS GLN TRP SER ASP PHE ARG GLY THR ILE ILE GLU ARG SEQRES 4 62 GLY CYS GLY CYS PRO THR VAL LYS PRO GLY ILE LYS LEU SEQRES 5 62 SER CYS CYS GLU SER GLU VAL CYS ASN ASN HET SO4 1 2 HETNAM SO4 SULFATE ION FORMUL 2 SO4 O4 S 2- FORMUL 3 HOH *51(H2 O1) SHEET 1 AB 2 ARG 1 ASN 5 0 SHEET 2 AB 2 GLN 12 CYS 17 -1 O LYS 15 N CYS 3 TURN 1 T1 GLN 7 GLN 10 TYPE II(PRIME) BEND TURN 2 T2 SER 18 GLU 21 TYPE II BEND TURN 3 T3 ASP 31 GLY 34 TYPE I/III BEND TURN 4 T4 LYS 47 ILE 50 TYPE II BEND TURN 5 T5 SER 57 CYS 60 TYPE II BEND SSBOND 1 CYS 3 CYS 24 SSBOND 2 CYS 17 CYS 41 SSBOND 3 CYS 43 CYS 54 SSBOND 4 CYS 55 CYS 60 SITE 1 RCT 20 TYR 25 LYS 27 TRP 29 ASP 31 SITE 2 RCT 20 PHE 32 ARG 33 GLY 34 ILE 36 SITE 3 RCT 20 GLU 38 GLY 40 CYS 41 GLY 42 SITE 4 RCT 20 CYS 43 PRO 44 VAL 46 LYS 47 SITE 5 RCT 20 GLY 49 ILE 50 LEU 52 CYS 54 SITE 1 FNR 4 LYS 27 TRP 29 ARG 33 LYS 47 SITE 1 CMR 13 CYS 3 CYS 17 CYS 24 TYR 25 SITE 2 CMR 13 GLY 34 CYS 41 GLY 42 CYS 43 SITE 3 CMR 13 PRO 44 CYS 54 CYS 55 CYS 60 SITE 4 CMR 13 ASN 61 CRYST1 49.940 46.580 21.590 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 0.020024 0.000000 0.000000 0.00000 SCALE2 0.000000 0.021468 0.000000 0.00000 SCALE3 0.000000 0.000000 0.046948 0.00000