1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 Rogers, J.P. Luginbuhl, P. Pemberton, K. Harty, P. Wemmer, D.E. Stevens, R.C. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 1 90.00 90.00 90.00 1.000 1.000 1.000 C3 H7 N O2 89.093 y ALANINE L-peptide linking C6 H15 N4 O2 1 175.209 y ARGININE L-peptide linking C4 H8 N2 O3 132.118 y ASPARAGINE L-peptide linking C4 H7 N O4 133.103 y ASPARTIC ACID 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 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 C11 H12 N2 O2 204.225 y TRYPTOPHAN L-peptide linking UK J.Mol.Biol. JMOBAK 0070 0022-2836 304 911 10.1006/JMBI.2000.4247 11124036 Structure-Activity Relationships in a Peptidic Alpha7 Nicotinic Acetylcholine Receptor Antagonist 2000 US Biochemistry BICHAW 0033 0006-2960 38 3874 10.1021/BI9826254 10194298 NMR Solution Structure of Alpha-Conotoxin Imi and Comparison to Other Conotoxins Specific for Neuronal Nicotinic Acetylcholine Receptors 1999 US Mol.Pharmacol. MOPMA3 0197 0026-895X 48 194 7651351 Alpha-Conotoxin Imi Exhibits Subtype-Specific Nicotinic Acetylcholine Receptor Blockade: Preferential Inhibition of Homomeric Alpha7 and Alpha9 Receptors 1995 US J.Biol.Chem. JBCHA3 0071 0021-9258 269 16733 8206995 A Nicotinic Acetylcholine Receptor Ligand of Unique Specificity, Alpha-Conotoxin Imi 1994 10.2210/pdb1e76/pdb pdb_00001e76 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 1355.616 ALPHA-CONOTOXIN IM1(D5N) YES 1 syn polymer no yes GCCSNPRCAWRC(NH2) GCCSNPRCAWRCX A polypeptide(L) n n n n n n n n n n n n n pdbx_nmr_representative pdbx_database_status struct_conn database_2 pdbx_database_status repository Initial release Version format compliance Version format compliance Structure summary Derived calculations Other Database references Other 1 0 2000-12-27 1 1 2011-05-08 1 2 2011-07-13 1 3 2017-06-14 1 4 2020-01-15 1 5 2023-06-14 _pdbx_nmr_representative.conformer_id _pdbx_nmr_representative.selection_criteria _pdbx_database_status.status_code_cs _pdbx_database_status.status_code_mr _struct_conn.pdbx_leaving_atom_flag _database_2.pdbx_DOI _database_2.pdbx_database_accession _pdbx_database_status.status_code_nmr_data NMR SOLUTION STRUCTURE OF ALPHA-CONOTOXIN IM1 POINT MUTATION VARIANT R11E (20 STRUCTURES) NMR SOLUTION STRUCTURE OF ALPHA-CONOTOXIN IM1 POINT MUTATION VARIANT R7L (20 STRUCTURES) NMR SOLUTION STRUCTURE OF ALPHA-CONOTOXIN IM1, (20 STRUCTURES) SOLUTION STRUCTURE OF ALPHA-CONOTOXIN IM1 ALPHA-CONOTOXIN IMI (10 STRUCTURES) PDBE Y PDBE 2000-08-24 REL REL REL REL SYNTHESIZED USING STANDARD FMOC CHEMISTRY. IM1 SEQUENCE FOUND NATURALLY IN CONUS IMPERIALIS VENOM 35631 CONUS IMPERIALIS sample DATA CONSIST OF 70 UPPER LIMITS ON DISTANCES OBTAINED FROM NOE MEASUREMENTS AND 34 ANGLE CONSTRAINTS OBTAINED FROM NOE MEASUREMENTS AND COUPLING CONSTANT MEASUREMENTS. THESE INPUT DATA ARE ALSO AVAILABLE FROM THE PROTEIN DATA BANK. FIVE STEREOSPECIFIC RESONANCE ASSIGNMENTS HAVE BEEN MADE. TORSION ANGLE DYNAMICS CALCULATIONS WERE PERFORMED WITH THE PROGRAM DYANA (P. GUNTERT, C. MUMENTHALER, K. WUTHRICH, J. MOL. BIOL. (1997) VOL. 273, 283-298). FOR THE RESTRAINED ENERGY MINIMIZATION THE PROGRAM OPAL (P. LUGINBUHL, P. GUNTERT, M. BILLETER, K. WUTHRICH, J. BIOMOL. NMR (1996) VOL. 8, 136-146) WAS USED. DEPOSITED COORDINATES ARE THOSE OF CONFORMERS 1-20 IN THE PAPER CITED ON *JRNL* RECORDS ABOVE. NO VIOLATIONS OF DISTANCE CONSTRAINTS FROM NOES EXCEED 0.10 ANGSTROMS, AND NO VIOLATIONS OF ANGLE CONSTRAINTS EXCEED 2.0 DEGREES. REPRESENTATIVE CONFORMER HAS THE SMALLEST RMSD TO THE MEAN STRUCTURE UPON SUPERPOSITION OF THE BACKBONE ATOMS N, CA, AND C' OF RESIDUES 2-11. LOWEST RESIDUAL TARGET FUNCTION 40 20 TOCSY ROESY DQF-COSY 4.1 pH 298 K FOR THE PRESENT STRUCTURES THE NMR DISTANCE CONSTRAINTS WERE WEIGHTED SUCH THAT A VIOLATION OF AN UPPER DISTANCE LIMIT OF 0.1 ANGSTROM CORRESPONDS TO AN ENERGY OF KT/2. THE CONSTRAINTS ON DIHEDRAL ANGLES RESULTING FROM MEASUREMENTS OF VICINAL COUPLING CONSTANTS WERE WEIGHTED SUCH THAT A VIOLATION OF 2.5 DEGREES CORRESPONDS TO AN ENERGY OF KT/2. TORSION ANGLE DYNAMICS, RESTRAINED ENERGY MINIMISATION 7 closest to the average LUGINBUHL,GUNTERT,BILLETER,WUTHRICH refinement OPAL structure solution DYANA structure solution OPAL 400 Bruker DRX 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 ASN 5 n 5 ASN 5 A PRO 6 n 6 PRO 6 A ARG 7 n 7 ARG 7 A CYS 8 n 8 CYS 8 A ALA 9 n 9 ALA 9 A TRP 10 n 10 TRP 10 A ARG 11 n 11 ARG 11 A CYS 12 n 12 CYS 12 A NH2 13 n 13 NH2 13 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 4 A ARG 7 0.090 SIDE CHAIN 9 A ARG 11 0.076 SIDE CHAIN 1 A CYS 2 -133.82 -40.08 1 A SER 4 -63.51 0.21 2 A ALA 9 -66.01 1.85 2 A ARG 11 -173.56 51.44 3 A CYS 2 33.94 -69.53 3 A PRO 6 -74.40 29.54 3 A TRP 10 -55.32 -79.88 3 A ARG 11 -66.40 85.82 4 A CYS 2 73.55 -39.73 4 A CYS 8 -141.73 19.81 5 A CYS 2 67.59 -44.04 5 A PRO 6 -66.87 6.33 5 A ARG 11 -173.08 25.35 6 A CYS 2 -152.06 -19.21 6 A PRO 6 -74.55 38.35 6 A ARG 11 -173.09 115.75 7 A CYS 2 -151.93 -39.23 7 A ARG 11 -173.47 9.91 8 A CYS 2 -151.11 -54.09 8 A ALA 9 -65.14 2.85 8 A ARG 11 171.68 24.10 9 A CYS 2 -138.68 -34.74 9 A SER 4 -64.21 0.07 9 A CYS 8 -146.43 19.53 9 A ARG 11 -66.33 24.81 10 A CYS 2 -136.27 -34.05 10 A SER 4 -63.63 1.50 10 A ARG 7 -158.34 -7.65 10 A TRP 10 -71.81 -106.48 10 A ARG 11 -66.66 99.92 11 A CYS 2 34.07 -70.27 11 A ARG 7 -146.02 -24.50 11 A ARG 11 -173.32 72.68 12 A CYS 2 64.50 -24.13 12 A ALA 9 -66.08 7.76 13 A PRO 6 -75.61 24.19 13 A CYS 8 -141.65 16.05 13 A TRP 10 -53.88 -90.20 13 A ARG 11 -66.56 8.68 14 A CYS 2 43.90 -80.99 14 A SER 4 -77.50 21.89 14 A ARG 7 -90.79 -68.81 15 A CYS 2 -130.41 -50.84 15 A ARG 7 -143.56 13.22 15 A CYS 8 -140.32 10.43 15 A ARG 11 163.60 120.97 16 A CYS 2 -136.82 -51.69 16 A ARG 7 -149.80 -30.12 16 A ARG 11 -173.41 138.30 17 A SER 4 -67.71 0.03 17 A ARG 11 -66.66 -147.27 18 A CYS 2 62.10 -30.65 18 A ALA 9 -48.01 -75.43 18 A ARG 11 -66.78 -151.24 19 A CYS 2 60.50 -46.41 19 A ARG 7 -146.27 -22.28 19 A ARG 11 -66.26 -162.60 20 A CYS 2 -124.52 -51.67 20 A SER 4 -73.84 25.40 20 A ARG 7 -144.83 -79.70 20 A TRP 10 -54.35 -70.81 20 A ARG 11 -66.90 14.76 NMR SOLUTION STRUCTURE OF ALPHA-CONOTOXIN IM1 POINT MUTATION VARIANT D5N 1 N N disulf 2.038 A CYS 2 A SG CYS 2 1_555 A CYS 8 A SG CYS 8 1_555 disulf 2.033 A CYS 3 A SG CYS 3 1_555 A CYS 12 A SG CYS 12 1_555 covale 1.321 both A CYS 12 A C CYS 12 1_555 A NH2 13 A N NH2 13 1_555 PEPTIDE TOXIN PEPTIDE TOXIN, NEUROTOXIN, NEURONAL NICOTINIC ACETYLCHOLINE RECEPTOR ANTAGONIST, ALPHA-CONOTOXIN, NMR SOLUTION STRUCTURE CXA1_CONIM UNP 1 P50983 1 12 1E76 1 12 P50983 A 1 1 12 1 ASP engineered mutation ASN 5 1E76 A P50983 UNP 5 5 1 P 1