HEADER TOXIN 04-APR-01 1IDG TITLE THE NMR SOLUTION STRUCTURE OF THE COMPLEX FORMED BETWEEN ALPHA- TITLE 2 BUNGAROTOXIN AND AN 18MER COGNATE PEPTIDE CAVEAT 1IDG THERE ARE SEVERAL CHIRALITY ERRORS IN CHAINS A AND B. COMPND MOL_ID: 1; COMPND 2 MOLECULE: ALPHA-BUNGAROTOXIN; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: LONG NEUROTOXIN 1; COMPND 5 MOL_ID: 2; COMPND 6 MOLECULE: ACETYLCHOLINE RECEPTOR PROTEIN, ALPHA CHAIN; COMPND 7 CHAIN: B; COMPND 8 SYNONYM: NACHR-ALPHA1-SUBUNIT; COMPND 9 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: BUNGARUS MULTICINCTUS; SOURCE 3 ORGANISM_COMMON: MANY-BANDED KRAIT; SOURCE 4 ORGANISM_TAXID: 8616; SOURCE 5 OTHER_DETAILS: PURCHASED FROM SIGMA; SOURCE 6 MOL_ID: 2; SOURCE 7 ORGANISM_SCIENTIFIC: TORPEDO CALIFORNICA; SOURCE 8 ORGANISM_COMMON: PACIFIC ELECTRIC RAY; SOURCE 9 ORGANISM_TAXID: 7787; SOURCE 10 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21(DE3); SOURCE 11 EXPRESSION_SYSTEM_TAXID: 469008; SOURCE 12 EXPRESSION_SYSTEM_STRAIN: BL21 (DE3); SOURCE 13 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 14 EXPRESSION_SYSTEM_PLASMID: PET-31B(+) KEYWDS ALPHA-BUNGAROTOXIN, NICOTINIC ACETYLCHOLINE RECEPTOR, ALPHA 1 KEYWDS 2 SUBUNIT, PROTEIN-PROTEIN INTERACTION, CATION-PI INTERACTION, TOXIN EXPDTA SOLUTION NMR MDLTYP MINIMIZED AVERAGE AUTHOR H.ZENG,L.MOISE,M.A.GRANT,E.HAWROT REVDAT 7 23-FEB-22 1IDG 1 REMARK REVDAT 6 24-FEB-09 1IDG 1 VERSN REVDAT 5 30-SEP-03 1IDG 1 JRNL DBREF REVDAT 4 21-NOV-01 1IDG 1 ATOM REVDAT 3 14-NOV-01 1IDG 1 REMARK SEQRES SEQADV REVDAT 2 27-JUN-01 1IDG 1 JRNL REVDAT 1 25-APR-01 1IDG 0 JRNL AUTH H.ZENG,L.MOISE,M.A.GRANT,E.HAWROT JRNL TITL THE SOLUTION STRUCTURE OF THE COMPLEX FORMED BETWEEN JRNL TITL 2 ALPHA-BUNGAROTOXIN AND AN 18-MER COGNATE PEPTIDE DERIVED JRNL TITL 3 FROM THE ALPHA 1 SUBUNIT OF THE NICOTINIC ACETYLCHOLINE JRNL TITL 4 RECEPTOR FROM TORPEDO CALIFORNICA. JRNL REF J.BIOL.CHEM. V. 276 22930 2001 JRNL REFN ISSN 0021-9258 JRNL PMID 11312275 JRNL DOI 10.1074/JBC.M102300200 REMARK 2 REMARK 2 RESOLUTION. NOT APPLICABLE. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : XWINNMR 2.1, CNSSOLVE 1.0 REMARK 3 AUTHORS : BRUKER (XWINNMR), BRUNGER, A.T. ET AL. (CNSSOLVE) REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1IDG COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 09-APR-01. REMARK 100 THE DEPOSITION ID IS D_1000013180. REMARK 210 REMARK 210 EXPERIMENTAL DETAILS REMARK 210 EXPERIMENT TYPE : NMR REMARK 210 TEMPERATURE (KELVIN) : 308 REMARK 210 PH : 4.0 REMARK 210 IONIC STRENGTH : NULL REMARK 210 PRESSURE : AMBIENT REMARK 210 SAMPLE CONTENTS : 2.1 MM ALPHA REMARK 210 -BUNGAROTOXIN/ALPHA18MER COMPLEX, REMARK 210 ALPHA18MER IS 15N LABELED, 50 REMARK 210 MM PERDEUTERATED POTASSIUM REMARK 210 ACETATE BUFFER (PH 4.0) WITH 5% REMARK 210 D2O AND 0.05% SODIUM AZIDE REMARK 210 REMARK 210 NMR EXPERIMENTS CONDUCTED : 3D_15N-SEPARATED_TOCSY; 3D HNHA; REMARK 210 3D_15N-SEPARATED_NOESY; 2D_TOCSY; REMARK 210 2D_NOESY; 2D 1H-15N HSQC REMARK 210 SPECTROMETER FIELD STRENGTH : 600 MHZ REMARK 210 SPECTROMETER MODEL : AVANCE REMARK 210 SPECTROMETER MANUFACTURER : BRUKER REMARK 210 REMARK 210 STRUCTURE DETERMINATION. REMARK 210 SOFTWARE USED : NMRPIPE 1.8, SPARKY 3.95 REMARK 210 METHOD USED : DISTANCE GEOMETRY AND SIMULATED REMARK 210 ANNEALING REMARK 210 REMARK 210 CONFORMERS, NUMBER CALCULATED : 1 REMARK 210 CONFORMERS, NUMBER SUBMITTED : 1 REMARK 210 CONFORMERS, SELECTION CRITERIA : NULL REMARK 210 REMARK 210 BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE : NULL REMARK 210 REMARK 210 REMARK: THE CHIRALITY ERROR IS IN THR 6 CB, OG1; ILE 11 CB, CG2; REMARK 210 AND THR 196 CB, OG1. THERE IS NO CHIRALITY ERROR IF MOLMOL IS REMARK 210 USED TO VIEW THE STRUCTURE. REMARK 215 REMARK 215 NMR STUDY REMARK 215 THE COORDINATES IN THIS ENTRY WERE GENERATED FROM SOLUTION REMARK 215 NMR DATA. PROTEIN DATA BANK CONVENTIONS REQUIRE THAT REMARK 215 CRYST1 AND SCALE RECORDS BE INCLUDED, BUT THE VALUES ON REMARK 215 THESE RECORDS ARE MEANINGLESS. 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 465 REMARK 465 MISSING RESIDUES REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE REMARK 465 EXPERIMENT. (RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 465 SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.) REMARK 465 RES C SSSEQI REMARK 465 HSL B 199 REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS 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 C ALA A 31 C PHE A 32 1.43 REMARK 500 N PRO A 73 N GLY A 74 1.52 REMARK 500 C GLY A 19 H GLU A 20 1.57 REMARK 500 REMARK 500 REMARK: NULL 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 4 CG HIS A 4 CD2 0.057 REMARK 500 HIS A 68 CG HIS A 68 CD2 0.056 REMARK 500 ARG A 72 C PRO A 73 N 0.147 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 HIS A 4 ND1 - CE1 - NE2 ANGL. DEV. = 7.8 DEGREES REMARK 500 GLU A 20 N - CA - C ANGL. DEV. = -63.1 DEGREES REMARK 500 GLU A 20 CA - C - N ANGL. DEV. = -18.0 DEGREES REMARK 500 ARG A 25 NE - CZ - NH1 ANGL. DEV. = 4.1 DEGREES REMARK 500 PHE A 32 CB - CA - C ANGL. DEV. = 16.5 DEGREES REMARK 500 PHE A 32 N - CA - C ANGL. DEV. = -57.7 DEGREES REMARK 500 PHE A 32 CA - C - O ANGL. DEV. = -15.8 DEGREES REMARK 500 PHE A 32 CA - C - N ANGL. DEV. = -14.2 DEGREES REMARK 500 PHE A 32 O - C - N ANGL. DEV. = -9.8 DEGREES REMARK 500 ARG A 36 NE - CZ - NH1 ANGL. DEV. = 3.9 DEGREES REMARK 500 HIS A 68 ND1 - CE1 - NE2 ANGL. DEV. = 8.0 DEGREES REMARK 500 ARG A 72 N - CA - CB ANGL. DEV. = 16.5 DEGREES REMARK 500 ARG A 72 NE - CZ - NH1 ANGL. DEV. = 3.3 DEGREES REMARK 500 ARG A 72 N - CA - C ANGL. DEV. = -61.1 DEGREES REMARK 500 PRO A 73 CA - N - CD ANGL. DEV. = -23.1 DEGREES REMARK 500 PRO A 73 N - CA - CB ANGL. DEV. = 18.0 DEGREES REMARK 500 PRO A 73 N - CD - CG ANGL. DEV. = 14.3 DEGREES REMARK 500 PRO A 73 N - CA - C ANGL. DEV. = -60.6 DEGREES REMARK 500 PRO A 73 O - C - N ANGL. DEV. = -12.0 DEGREES REMARK 500 ARG B 182 NE - CZ - NH1 ANGL. DEV. = 3.8 DEGREES REMARK 500 TRP B 184 N - CA - CB ANGL. DEV. = 14.1 DEGREES REMARK 500 HIS B 186 ND1 - CE1 - NE2 ANGL. DEV. = 8.1 DEGREES REMARK 500 TRP B 187 CB - CA - C ANGL. DEV. = 13.3 DEGREES REMARK 500 TRP B 187 CA - C - N ANGL. DEV. = 15.3 DEGREES REMARK 500 TRP B 187 O - C - N ANGL. DEV. = -10.3 DEGREES REMARK 500 VAL B 188 CB - CA - C ANGL. DEV. = 12.9 DEGREES REMARK 500 VAL B 188 CA - CB - CG2 ANGL. DEV. = 11.1 DEGREES REMARK 500 VAL B 188 O - C - N ANGL. DEV. = -11.1 DEGREES REMARK 500 CYS B 193 CB - CA - C ANGL. DEV. = 7.3 DEGREES REMARK 500 THR B 196 CA - CB - CG2 ANGL. DEV. = 10.6 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 THR A 6 -95.56 68.62 REMARK 500 THR A 8 -47.55 72.29 REMARK 500 SER A 12 -103.63 -165.23 REMARK 500 VAL A 14 -140.94 -111.11 REMARK 500 THR A 15 128.53 80.01 REMARK 500 PRO A 17 -62.47 -100.43 REMARK 500 PRO A 18 -72.87 -68.92 REMARK 500 GLU A 20 125.00 177.08 REMARK 500 ASN A 21 -133.25 82.88 REMARK 500 TYR A 24 86.60 -45.97 REMARK 500 CYS A 29 76.90 56.33 REMARK 500 ALA A 31 -112.78 -155.58 REMARK 500 PHE A 32 -124.31 5.09 REMARK 500 CYS A 33 94.03 50.99 REMARK 500 SER A 34 -70.01 -77.91 REMARK 500 SER A 35 74.85 -116.26 REMARK 500 LYS A 38 57.74 39.59 REMARK 500 GLU A 41 -83.71 -167.44 REMARK 500 LEU A 42 129.37 48.29 REMARK 500 CYS A 44 143.74 62.94 REMARK 500 LYS A 51 16.64 178.40 REMARK 500 LYS A 52 -168.96 -110.78 REMARK 500 PRO A 53 -70.43 -72.44 REMARK 500 GLU A 55 -138.75 -114.74 REMARK 500 GLU A 56 -75.79 157.30 REMARK 500 CYS A 59 150.56 57.27 REMARK 500 THR A 62 -65.24 86.01 REMARK 500 ASP A 63 -157.99 -132.69 REMARK 500 LYS A 64 85.32 -35.97 REMARK 500 PRO A 67 -91.11 -78.02 REMARK 500 HIS A 68 -172.04 177.40 REMARK 500 GLN A 71 21.52 31.55 REMARK 500 ARG B 182 110.17 19.15 REMARK 500 TRP B 184 108.60 94.32 REMARK 500 LYS B 185 99.87 41.82 REMARK 500 HIS B 186 -170.03 66.28 REMARK 500 TRP B 187 -101.01 -128.79 REMARK 500 VAL B 188 177.85 66.26 REMARK 500 TYR B 189 63.65 93.71 REMARK 500 THR B 191 -16.68 -32.35 REMARK 500 CYS B 193 65.85 61.95 REMARK 500 PRO B 194 -175.08 -55.42 REMARK 500 PRO B 197 -73.11 -88.79 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: NON-CIS, NON-TRANS REMARK 500 REMARK 500 THE FOLLOWING PEPTIDE BONDS DEVIATE SIGNIFICANTLY FROM BOTH REMARK 500 CIS AND TRANS CONFORMATION. CIS BONDS, IF ANY, ARE LISTED REMARK 500 ON CISPEP RECORDS. TRANS IS DEFINED AS 180 +/- 30 AND REMARK 500 CIS IS DEFINED AS 0 +/- 30 DEGREES. REMARK 500 MODEL OMEGA REMARK 500 THR A 5 THR A 6 121.19 REMARK 500 THR A 6 ALA A 7 -139.48 REMARK 500 THR A 8 SER A 9 -140.04 REMARK 500 ALA A 13 VAL A 14 -143.04 REMARK 500 CYS A 16 PRO A 17 -146.43 REMARK 500 PRO A 18 GLY A 19 129.62 REMARK 500 GLU A 20 ASN A 21 114.94 REMARK 500 ASN A 21 LEU A 22 -134.56 REMARK 500 ALA A 31 PHE A 32 121.98 REMARK 500 PHE A 32 CYS A 33 -112.60 REMARK 500 GLU A 55 GLU A 56 -135.05 REMARK 500 ASP A 63 LYS A 64 122.88 REMARK 500 HIS A 68 PRO A 69 130.69 REMARK 500 LYS A 70 GLN A 71 149.59 REMARK 500 ARG A 72 PRO A 73 -105.65 REMARK 500 PRO A 73 GLY A 74 -104.65 REMARK 500 TYR B 181 ARG B 182 106.10 REMARK 500 TRP B 184 LYS B 185 110.90 REMARK 500 HIS B 186 TRP B 187 -146.30 REMARK 500 TYR B 190 THR B 191 139.72 REMARK 500 PRO B 194 ASP B 195 -108.61 REMARK 500 PRO B 197 TYR B 198 144.35 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 24 0.07 SIDE CHAIN REMARK 500 ARG A 36 0.08 SIDE CHAIN REMARK 500 TYR A 54 0.10 SIDE CHAIN REMARK 500 ARG A 72 0.08 SIDE CHAIN REMARK 500 TYR B 181 0.07 SIDE CHAIN REMARK 500 TYR B 189 0.08 SIDE CHAIN REMARK 500 TYR B 190 0.14 SIDE CHAIN REMARK 500 TYR B 198 0.07 SIDE CHAIN REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: MAIN CHAIN PLANARITY REMARK 500 REMARK 500 THE FOLLOWING RESIDUES HAVE A PSEUDO PLANARITY REMARK 500 TORSION ANGLE, C(I) - CA(I) - N(I+1) - O(I), GREATER REMARK 500 10.0 DEGREES. (M=MODEL NUMBER; RES=RESIDUE NAME; REMARK 500 C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; REMARK 500 I=INSERTION CODE). REMARK 500 REMARK 500 M RES CSSEQI ANGLE REMARK 500 GLU A 20 -18.24 REMARK 500 ALA A 31 29.76 REMARK 500 PHE A 32 34.60 REMARK 500 ARG A 72 -16.00 REMARK 500 PRO A 73 -24.09 REMARK 500 REMARK 500 REMARK: NULL REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1IDH RELATED DB: PDB REMARK 900 1IDH IS 20 ENSEMBLE STRUCTURES OF THE COMPLEX BETWEEN ALPHA- REMARK 900 BUNGAROTOXIN AND AN 18MER COGNATE PEPTIDE REMARK 900 RELATED ID: 1IDI RELATED DB: PDB REMARK 900 1IDI IS THE AVERAGE STRUCTURE OF ALPHA-BUNGAROTOXIN REMARK 900 RELATED ID: 1IDL RELATED DB: PDB REMARK 900 1IDL IS 20 ENSEMBLE STRUCTURES OF ALPHA-BUNGAROTOXIN DBREF 1IDG A 1 74 UNP P60615 NXL1A_BUNMU 1 74 DBREF 1IDG B 181 198 UNP P02710 ACHA_TORCA 205 222 SEQADV 1IDG HSL B 199 UNP P02710 CLONING ARTIFACT SEQRES 1 A 74 ILE VAL CYS HIS THR THR ALA THR SER PRO ILE SER ALA SEQRES 2 A 74 VAL THR CYS PRO PRO GLY GLU ASN LEU CYS TYR ARG LYS SEQRES 3 A 74 MET TRP CYS ASP ALA PHE CYS SER SER ARG GLY LYS VAL SEQRES 4 A 74 VAL GLU LEU GLY CYS ALA ALA THR CYS PRO SER LYS LYS SEQRES 5 A 74 PRO TYR GLU GLU VAL THR CYS CYS SER THR ASP LYS CYS SEQRES 6 A 74 ASN PRO HIS PRO LYS GLN ARG PRO GLY SEQRES 1 B 19 TYR ARG GLY TRP LYS HIS TRP VAL TYR TYR THR CYS CYS SEQRES 2 B 19 PRO ASP THR PRO TYR HSL SSBOND 1 CYS A 3 CYS A 23 1555 1555 2.01 SSBOND 2 CYS A 16 CYS A 44 1555 1555 2.00 SSBOND 3 CYS A 29 CYS A 33 1555 1555 2.00 SSBOND 4 CYS A 48 CYS A 59 1555 1555 2.01 SSBOND 5 CYS A 60 CYS A 65 1555 1555 2.00 SSBOND 6 CYS B 192 CYS B 193 1555 1555 2.04 CISPEP 1 GLY A 19 GLU A 20 0 23.54 CISPEP 2 GLY B 183 TRP B 184 0 -4.48 CISPEP 3 LYS B 185 HIS B 186 0 11.62 CISPEP 4 TRP B 187 VAL B 188 0 -19.73 CISPEP 5 VAL B 188 TYR B 189 0 -21.40 CISPEP 6 ASP B 195 THR B 196 0 -13.27 CRYST1 1.000 1.000 1.000 90.00 90.00 90.00 P 1 1 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 1.000000 0.000000 0.000000 0.00000 SCALE2 0.000000 1.000000 0.000000 0.00000 SCALE3 0.000000 0.000000 1.000000 0.00000