1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 Chi, S.-W. Kim, D.-H. Olivera, B.M. McIntosh, J.M. Han, K.-H. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic C3 H7 N O2 89.093 y ALANINE L-peptide linking C3 H7 N O2 S 121.158 y CYSTEINE L-peptide linking C2 H5 N O2 75.067 y GLYCINE peptide linking C6 H13 N O2 131.173 y LEUCINE L-peptide linking H2 N 16.023 AMINO GROUP non-polymer C5 H9 N O2 115.130 y PROLINE L-peptide linking C3 H7 N O3 105.093 y SERINE L-peptide linking C4 H9 N O3 119.119 y THREONINE L-peptide linking C9 H11 N O3 181.189 y TYROSINE L-peptide linking C5 H11 N O2 117.146 y VALINE L-peptide linking US Biochem.Biophys.Res.Commun. BBRCA9 0146 0006-291X 349 1228 1234 10.1016/j.bbrc.2006.08.164 16979596 NMR structure determination of alpha-conotoxin BuIA, a novel neuronal nicotinic acetylcholine receptor antagonist with an unusual 4/4 disulfide scaffold 2006 10.2210/pdb2i28/pdb pdb_00002i28 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 1314.597 Alpha-conotoxin BuIA Alpha-conotoxin BuIA 1 syn polymer no yes GCCSTPPCAVLYC(NH2) GCCSTPPCAVLYCX A polypeptide(L) n n n n n n n n n n n n n n database_2 pdbx_struct_assembly pdbx_struct_oper_list struct_conn struct_site repository Initial release Version format compliance Version format compliance Database references Derived calculations 1 0 2006-10-31 1 1 2008-05-01 1 2 2011-07-13 1 3 2022-03-09 _database_2.pdbx_DOI _database_2.pdbx_database_accession _struct_conn.pdbx_leaving_atom_flag _struct_site.pdbx_auth_asym_id _struct_site.pdbx_auth_comp_id _struct_site.pdbx_auth_seq_id RCSB Y PDBJ 2006-08-16 REL This sequence occurs naturally in Conus bullatus. sample structures with the lowest energy 50 20 2D NOESY 2D TOCSY DQF-COSY 2D NOESY 2D TOCSY DQF-COSY 0 3.04 1 atm 278 K 0 3.04 1 atm 288 K simulated annealing 1 fewest violations 5mM alpha-conotoxin BuIA; 90% H2O, 10% D2O 90% H2O/10% D2O collection VNMR processing NMRPipe refinement CNS 600 Varian INOVA GLY 1 n 1 GLY 1 A CYS 2 n 2 CYS 2 A CYS 3 n 3 CYS 3 A SER 4 n 4 SER 4 A THR 5 n 5 THR 5 A PRO 6 n 6 PRO 6 A PRO 7 n 7 PRO 7 A CYS 8 n 8 CYS 8 A ALA 9 n 9 ALA 9 A VAL 10 n 10 VAL 10 A LEU 11 n 11 LEU 11 A TYR 12 n 12 TYR 12 A CYS 13 n 13 CYS 13 A NH2 14 n 14 NH2 14 A author_defined_assembly 1 monomeric 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 1_555 x,y,z identity operation 0.0000000000 0.0000000000 0.0000000000 3 A A O HN2 CYS NH2 8 14 1.59 7 A A O HN1 CYS NH2 8 14 1.58 9 A A O HN1 CYS NH2 8 14 1.54 11 A A O HN2 CYS NH2 8 14 1.57 12 A A O HN2 CYS NH2 8 14 1.60 13 A A O HN2 CYS NH2 8 14 1.59 14 A A O HN1 CYS NH2 8 14 1.51 17 A A O HN2 CYS NH2 8 14 1.57 1 A TYR 12 167.50 51.15 2 A TYR 12 162.56 51.23 3 A TYR 12 169.04 52.06 4 A TYR 12 160.60 58.54 5 A TYR 12 166.97 59.27 6 A TYR 12 173.42 45.02 7 A TYR 12 170.21 52.08 8 A TYR 12 168.11 51.48 9 A TYR 12 -177.65 50.84 10 A TYR 12 172.24 55.57 11 A TYR 12 172.50 53.71 12 A TYR 12 165.57 52.52 13 A TYR 12 169.38 55.15 14 A LEU 11 -70.08 -70.48 14 A TYR 12 178.05 57.63 15 A TYR 12 163.58 50.20 16 A TYR 12 163.93 45.78 17 A TYR 12 163.24 51.27 18 A TYR 12 168.92 50.27 19 A TYR 12 179.69 41.54 20 A TYR 12 168.71 51.09 Solution Structure of alpha-Conotoxin BuIA 1 N N A THR 5 A THR 5 HELX_P A VAL 10 A VAL 10 1 1 6 disulf 2.029 A CYS 2 A SG CYS 2 1_555 A CYS 8 A SG CYS 8 1_555 disulf 2.029 A CYS 3 A SG CYS 3 1_555 A CYS 13 A SG CYS 13 1_555 covale 1.333 both A CYS 13 A C CYS 13 1_555 A NH2 14 A N NH2 14 1_555 TOXIN alpha-helix, beta-turn, two disulfide bonds, C-terminal amidation, TOXIN CXA1_CONBU UNP 1 44 P69657 44 56 2I28 1 13 P69657 A 1 1 13 BINDING SITE FOR RESIDUE NH2 A 14 A NH2 14 Software 3 A CYS 8 A CYS 8 3 1_555 A TYR 12 A TYR 12 3 1_555 A CYS 13 A CYS 13 3 1_555