1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 Moise, L. Piserchio, A. Basus, V.J. Hawrot, E. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 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 C5 H10 N2 O3 146.144 y GLUTAMINE L-peptide linking C5 H9 N O4 147.129 y GLUTAMIC ACID L-peptide linking C2 H5 N O2 75.067 y GLYCINE peptide linking C6 H10 N3 O2 1 156.162 y HISTIDINE L-peptide linking C4 H7 N O2 101.104 n HOMOSERINE LACTONE L-peptide linking C6 H13 N O2 131.173 y ISOLEUCINE L-peptide linking C6 H13 N O2 131.173 y LEUCINE L-peptide linking C6 H15 N2 O2 1 147.195 y LYSINE L-peptide linking C5 H11 N O2 S 149.211 y METHIONINE L-peptide linking C9 H11 N O2 165.189 y PHENYLALANINE L-peptide linking 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 C11 H12 N2 O2 204.225 y TRYPTOPHAN 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 J.Biol.Chem. JBCHA3 0071 0021-9258 277 12406 12417 10.1074/jbc.M110320200 11790782 NMR structural analysis of alpha-bungarotoxin and its complex with the principal alpha-neurotoxin-binding sequence on the alpha 7 subunit of a neuronal nicotinic acetylcholine receptor. 2002 US J.Biol.Chem. JBCHA3 0071 0021-9258 274 26113 26119 10.1074/jbc.274.37.26113 Chimeric analysis of a neuronal nicotinic acetylcholine receptor reveals amino acids conferring sensitivity to alpha-bungarotoxin. 1999 US J.Biol.Chem. JBCHA3 0071 0021-9258 266 15230 15239 Identification of sequence segments forming the alpha-bungarotoxin binding sites on two nicotinic acetylcholine receptor alpha subunits from the avian brain. 1991 US Biochemistry BICHAW 0033 0006-2960 27 2763 2771 Structural studies of alpha-bungarotoxin. 1. Sequence-specific 1H NMR resonance assignments. 1988 10.2210/pdb1kc4/pdb pdb_00001kc4 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 1 SINGLE WAVELENGTH M 1 1.0 8005.281 alpha-bungarotoxin 1 nat polymer 2348.629 neuronal acetylcholine receptor protein, alpha-7 chain alpha-neurotoxin binding site 1 man polymer long neurotoxin 1 no no IVCHTTATSPISAVTCPPGENLCYRKMWCDAFCSSRGKVVELGCAATCPSKKPYEEVTCCSTDKCNPHPKQRPG IVCHTTATSPISAVTCPPGENLCYRKMWCDAFCSSRGKVVELGCAATCPSKKPYEEVTCCSTDKCNPHPKQRPG A polypeptide(L) no yes IPGKRTESFYECCKEPYPD(HSL) IPGKRTESFYECCKEPYPDS B polypeptide(L) n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n chicken Gallus Escherichia sample 9031 Gallus gallus 562 Escherichia coli BLR(DE3)pLysS plasmid pET31b(+) many-banded krait Bungarus sample 8616 Bungarus multicinctus database_2 pdbx_nmr_software pdbx_nmr_spectrometer pdbx_struct_assembly pdbx_struct_oper_list struct_ref_seq_dif repository Initial release Version format compliance Version format compliance Data collection Database references Derived calculations 1 0 2002-03-13 1 1 2008-04-27 1 2 2011-07-13 1 3 2021-10-27 _database_2.pdbx_DOI _database_2.pdbx_database_accession _pdbx_nmr_software.name _pdbx_nmr_spectrometer.model _struct_ref_seq_dif.details 1abt is alpha-Bungarotoxin Complexed With The 185 - 196 Fragment Of The -Subunit Of The Torpedo Nicotinic Acetylcholine Receptor (NMR, 4 Structures) 1idh is The NMR Solution Structure Of The Complex Formed Between alpha-Bungarotoxin and An 18Mer Cognate Peptide 1abx is The crystal structure of alpha-bungarotoxin at 2.5 A resolution: relation to solution structure and binding to acetylcholine receptor. 1i9b is the X-Ray Structure Of Acetylcholine Binding Protein (Achbp) 1HAJ IS A BETA-Hairpin Structure In A 13-Mer Peptide That Binds A-Bungarotoxin With High Affinity and Neutralizes Its Toxicity. 1HC9 IS A-Bungarotoxin Complexed With High Affinity Peptide. 1BXP IS THE Solution NMR Structure Of The Complex Of alpha-Bungarotoxin With A Library Derived Peptide, 20 Structures. 1JBD IS THE NMR Structure Of The Complex Between alpha-Bungarotoxin and A Mimotope Of The Nicotinic Acetilcholine Receptor. 1IKC IS THE NMR Structure Of alpha-Bungarotoxin. 1KFH IS THE SOLUTION STRUCTURE OF ALPHA-BUNGAROTOXIN BY NMR SPECTROSCOPY. 1KL8 IS the NMR STRUCTURAL ANALYSIS OF THE COMPLEX FORMED BETWEEN ALPHA-BUNGAROTOXIN AND THE PRINCIPAL ALPHA-NEUROTOXIN BINDING SEQUENCE ON THE ALPHA7 SUBUNIT OF A NEURONAL NICOTINIC ACETYLCHOLINE RECEPTOR RCSB Y RCSB 2001-11-07 REL REL THE WELL-DEFINED REGIONS IN THE COMPLEX, EXHIBITING EXTENSIVE LONG RANGE NOES, ARE: BGTX: 1-16, 22-28, 39-48, AND 54-68 ALPHA 7 19MER: 185-194 The submitted conformer models are the 10 with the lowest energy from a pool of over 100 accepted structures that had no restraint violations. 10 2D NOESY 2D TOCSY 3D_15N-separated_NOESY 3D_15N-separated_TOCSY 2D 1H-15N HSQC HNHA 5.5 ambient 308 K RMS DEVIATIONS FROM IDEAL VALUES: BOND LENGTH(A) 0.0039, ANGLES(DEG) 0.61, IMPROPERS(DEG) 0.53 distance geometry dynamical simulated annealing 1 determined by nmrclust 1.2 1.6 mM alpha-bungarotoxin/[U-15N]-alpha 7 19mer complex 30 mM sodium phosphate, pH 5.5 50 micromolar sodium azide 50 micromolar TMSP 95% H2O/5% D2O 1.6 mM alpha-bungarotoxin/[U-15N]-alpha 7 19mer complex 30 mM sodium phosphate, pH 5.5 50 micromolar sodium azide 50 micromolar TMSP 99.9% D2O collection XwinNMR 2.1 Delaglio, F., et al. processing NMRPipe 1.8 Goddard, T.D. and Kneller, D.G. data analysis Sparky 3.87 Brunger, A.T., et al. refinement CNS 1.0 600 Bruker AVANCE 400 Bruker AVANCE ILE 1 n 1 ILE 1 A VAL 2 n 2 VAL 2 A CYS 3 n 3 CYS 3 A HIS 4 n 4 HIS 4 A THR 5 n 5 THR 5 A THR 6 n 6 THR 6 A ALA 7 n 7 ALA 7 A THR 8 n 8 THR 8 A SER 9 n 9 SER 9 A PRO 10 n 10 PRO 10 A ILE 11 n 11 ILE 11 A SER 12 n 12 SER 12 A ALA 13 n 13 ALA 13 A VAL 14 n 14 VAL 14 A THR 15 n 15 THR 15 A CYS 16 n 16 CYS 16 A PRO 17 n 17 PRO 17 A PRO 18 n 18 PRO 18 A GLY 19 n 19 GLY 19 A GLU 20 n 20 GLU 20 A ASN 21 n 21 ASN 21 A LEU 22 n 22 LEU 22 A CYS 23 n 23 CYS 23 A TYR 24 n 24 TYR 24 A ARG 25 n 25 ARG 25 A LYS 26 n 26 LYS 26 A MET 27 n 27 MET 27 A TRP 28 n 28 TRP 28 A CYS 29 n 29 CYS 29 A ASP 30 n 30 ASP 30 A ALA 31 n 31 ALA 31 A PHE 32 n 32 PHE 32 A CYS 33 n 33 CYS 33 A SER 34 n 34 SER 34 A SER 35 n 35 SER 35 A ARG 36 n 36 ARG 36 A GLY 37 n 37 GLY 37 A LYS 38 n 38 LYS 38 A VAL 39 n 39 VAL 39 A VAL 40 n 40 VAL 40 A GLU 41 n 41 GLU 41 A LEU 42 n 42 LEU 42 A GLY 43 n 43 GLY 43 A CYS 44 n 44 CYS 44 A ALA 45 n 45 ALA 45 A ALA 46 n 46 ALA 46 A THR 47 n 47 THR 47 A CYS 48 n 48 CYS 48 A PRO 49 n 49 PRO 49 A SER 50 n 50 SER 50 A LYS 51 n 51 LYS 51 A LYS 52 n 52 LYS 52 A PRO 53 n 53 PRO 53 A TYR 54 n 54 TYR 54 A GLU 55 n 55 GLU 55 A GLU 56 n 56 GLU 56 A VAL 57 n 57 VAL 57 A THR 58 n 58 THR 58 A CYS 59 n 59 CYS 59 A CYS 60 n 60 CYS 60 A SER 61 n 61 SER 61 A THR 62 n 62 THR 62 A ASP 63 n 63 ASP 63 A LYS 64 n 64 LYS 64 A CYS 65 n 65 CYS 65 A ASN 66 n 66 ASN 66 A PRO 67 n 67 PRO 67 A HIS 68 n 68 HIS 68 A PRO 69 n 69 PRO 69 A LYS 70 n 70 LYS 70 A GLN 71 n 71 GLN 71 A ARG 72 n 72 ARG 72 A PRO 73 n 73 PRO 73 A GLY 74 n 74 GLY 74 A ILE 178 n 1 ILE 178 B PRO 179 n 2 PRO 179 B GLY 180 n 3 GLY 180 B LYS 181 n 4 LYS 181 B ARG 182 n 5 ARG 182 B THR 183 n 6 THR 183 B GLU 184 n 7 GLU 184 B SER 185 n 8 SER 185 B PHE 186 n 9 PHE 186 B TYR 187 n 10 TYR 187 B GLU 188 n 11 GLU 188 B CYS 189 n 12 CYS 189 B CYS 190 n 13 CYS 190 B LYS 191 n 14 LYS 191 B GLU 192 n 15 GLU 192 B PRO 193 n 16 PRO 193 B TYR 194 n 17 TYR 194 B PRO 195 n 18 PRO 195 B ASP 196 n 19 ASP 196 B n 20 197 B author_defined_assembly 2 dimeric 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 1_555 identity operation 0.0000000000 0.0000000000 0.0000000000 A O ALA 45 A O ALA 45 A N LEU 22 A N LEU 22 A N ARG 25 A N ARG 25 A O THR 58 A O THR 58 1 B HSL 197 B HSL 20 1 Y 2 B HSL 197 B HSL 20 1 Y 3 B HSL 197 B HSL 20 1 Y 4 B HSL 197 B HSL 20 1 Y 5 B HSL 197 B HSL 20 1 Y 6 B HSL 197 B HSL 20 1 Y 7 B HSL 197 B HSL 20 1 Y 8 B HSL 197 B HSL 20 1 Y 9 B HSL 197 B HSL 20 1 Y 10 B HSL 197 B HSL 20 1 Y 1 B B O H LYS TYR 191 194 1.52 2 A A O H ASP CYS 63 65 1.51 2 A A O H LEU ALA 22 45 1.59 3 A A O H ASP CYS 63 65 1.55 3 A A O N ASP CYS 63 65 2.13 4 A A O H ASP CYS 63 65 1.48 4 A A O N ASP CYS 63 65 2.16 5 A A O H ASP CYS 63 65 1.57 5 A A O N ASP CYS 63 65 2.09 6 A A O H ASP CYS 63 65 1.51 7 A A O H ASP CYS 63 65 1.49 7 A A O N ASP CYS 63 65 2.07 8 A A H O ASN ALA 21 45 1.55 10 A A O H ASP CYS 63 65 1.42 1 A HIS 4 -45.45 166.57 1 A ALA 7 76.08 45.14 1 A SER 9 -177.47 -61.05 1 A ILE 11 -53.71 106.98 1 A ALA 13 82.82 125.54 1 A CYS 16 -160.23 65.23 1 A PRO 17 -105.14 49.10 1 A ASN 21 -159.81 67.02 1 A LEU 22 -66.90 -174.40 1 A CYS 29 -144.38 -55.64 1 A ASP 30 62.43 149.95 1 A ALA 31 75.78 68.80 1 A PHE 32 53.04 88.87 1 A CYS 33 -143.98 21.42 1 A SER 34 179.47 -99.33 1 A SER 35 -141.45 -56.44 1 A ARG 36 -92.11 51.85 1 A VAL 40 -161.56 50.86 1 A GLU 41 -62.74 85.67 1 A LEU 42 -58.04 178.69 1 A CYS 48 -112.98 60.46 1 A PRO 49 -49.36 -170.64 1 A SER 50 -176.60 131.98 1 A LYS 51 -176.14 -159.80 1 A LYS 52 -105.24 75.37 1 A TYR 54 66.85 -0.06 1 A GLU 55 154.90 86.82 1 A GLU 56 -161.16 -150.80 1 A CYS 60 175.32 102.36 1 A SER 61 -78.87 -143.13 1 A THR 62 81.82 -88.85 1 A ASP 63 175.09 136.93 1 A HIS 68 104.71 -57.62 1 B LYS 181 -157.66 85.52 1 B THR 183 -160.13 71.19 1 B GLU 184 -107.93 -72.24 1 B TYR 187 -126.34 -147.20 1 B CYS 189 170.62 -25.86 1 B CYS 190 -146.63 20.67 1 B TYR 194 15.15 -77.56 1 B PRO 195 -55.40 99.16 2 A HIS 4 -49.98 166.74 2 A THR 5 -164.94 -55.24 2 A THR 6 -35.08 75.24 2 A SER 9 -173.11 -63.72 2 A SER 12 -123.61 -152.37 2 A PRO 17 -42.92 164.08 2 A CYS 29 138.41 -58.95 2 A ASP 30 46.23 -169.85 2 A ALA 31 68.37 -72.10 2 A PHE 32 -179.27 91.99 2 A SER 34 80.80 116.68 2 A SER 35 75.47 -78.88 2 A ARG 36 -93.78 41.04 2 A LYS 38 -88.26 -89.78 2 A VAL 39 169.77 -39.76 2 A VAL 40 45.78 178.85 2 A GLU 41 172.02 79.31 2 A CYS 48 82.59 86.93 2 A PRO 49 -83.49 -154.82 2 A SER 50 99.22 154.25 2 A LYS 52 36.82 51.55 2 A GLU 55 -119.41 -113.72 2 A GLU 56 136.30 131.22 2 A SER 61 -64.84 98.18 2 A THR 62 60.22 143.02 2 A ASP 63 100.12 145.41 2 A LYS 64 -65.89 54.35 2 A CYS 65 -89.80 35.87 2 A PRO 69 -72.89 -168.06 2 A LYS 70 -177.71 128.21 2 A GLN 71 -58.38 87.37 2 B GLU 184 30.97 96.95 2 B SER 185 -102.04 -153.26 2 B TYR 187 -119.99 -147.54 2 B CYS 189 169.02 -38.00 2 B CYS 190 -154.65 23.89 2 B LYS 191 -91.28 47.96 2 B GLU 192 62.43 160.51 2 B PRO 193 -60.08 78.12 2 B TYR 194 -8.61 99.23 2 B PRO 195 -50.83 178.91 3 A THR 5 -61.64 -154.68 3 A SER 9 178.91 -61.32 3 A ILE 11 -55.18 94.82 3 A ALA 13 -53.06 108.72 3 A VAL 14 -89.41 -156.17 3 A PRO 17 -102.63 48.45 3 A GLU 20 -60.61 -101.02 3 A ASN 21 -165.86 -32.46 3 A TRP 28 179.93 86.95 3 A CYS 29 167.27 -26.21 3 A ASP 30 -36.86 163.32 3 A ALA 31 98.30 -41.41 3 A PHE 32 177.41 81.36 3 A SER 34 147.20 -81.49 3 A SER 35 -155.84 -44.76 3 A VAL 40 -10.15 130.25 3 A LEU 42 -33.92 148.34 3 A PRO 49 -51.52 -169.37 3 A LYS 51 174.58 58.65 3 A LYS 52 34.02 71.38 3 A GLU 55 -176.46 112.59 3 A GLU 56 -154.08 -147.52 3 A CYS 59 -171.36 -173.32 3 A SER 61 -62.46 86.82 3 A THR 62 -177.14 -147.35 3 A ASP 63 -102.39 -139.41 3 A LYS 64 -44.89 68.36 3 A HIS 68 -142.15 54.57 3 A PRO 69 -89.66 -74.86 3 B PRO 179 -56.49 -179.53 3 B LYS 181 60.86 128.82 3 B ARG 182 -57.98 100.66 3 B THR 183 -152.88 67.51 3 B SER 185 -129.11 -151.36 3 B TYR 187 -118.63 -143.33 3 B CYS 189 168.82 -42.72 3 B CYS 190 -153.93 26.47 3 B LYS 191 -91.45 36.36 3 B GLU 192 63.85 157.33 3 B PRO 193 -54.81 77.68 3 B TYR 194 60.39 -169.66 4 A CYS 3 -173.95 135.64 4 A HIS 4 -44.36 163.93 4 A THR 6 -51.63 -73.03 4 A ALA 7 166.59 45.81 4 A SER 9 -179.33 -52.06 4 A PRO 10 -87.01 32.02 4 A ILE 11 20.64 92.31 4 A VAL 14 -115.41 -151.57 4 A THR 15 -107.75 -165.22 4 A GLU 20 61.05 133.65 4 A CYS 29 -102.45 -64.14 4 A ASP 30 55.28 177.22 4 A ALA 31 78.12 -58.54 4 A PHE 32 -158.52 -85.45 4 A CYS 33 40.54 93.39 4 A SER 34 35.82 40.74 4 A SER 35 63.59 -78.86 4 A VAL 39 -142.58 -14.56 4 A VAL 40 11.01 101.63 4 A LEU 42 -47.22 174.59 4 A THR 47 -135.29 -30.14 4 A CYS 48 61.54 110.03 4 A SER 50 -29.83 137.10 4 A LYS 51 167.32 85.20 4 A LYS 52 50.93 77.41 4 A TYR 54 46.38 29.06 4 A GLU 55 125.96 88.74 4 A GLU 56 -169.87 -140.36 4 A SER 61 -46.43 81.33 4 A THR 62 170.17 -168.17 4 A ASP 63 -83.95 -143.98 4 A LYS 64 -47.19 65.17 4 A ASN 66 -158.28 41.60 4 A PRO 67 -61.44 -94.17 4 A HIS 68 161.27 -65.03 4 A ARG 72 32.58 94.25 4 A PRO 73 -61.42 81.48 4 B PRO 179 -58.05 -165.59 4 B LYS 181 46.99 28.61 4 B ARG 182 59.83 145.30 4 B GLU 184 -59.36 -165.05 4 B SER 185 -157.47 -148.21 4 B GLU 188 115.51 -1.51 4 B CYS 189 -151.80 -55.42 4 B CYS 190 -160.31 -165.21 5 A THR 5 171.13 -98.71 5 A THR 6 72.87 -5.95 5 A ALA 7 27.76 36.82 5 A THR 8 -98.36 -65.80 5 A SER 9 175.42 -58.21 5 A ILE 11 44.89 142.57 5 A SER 12 -131.93 -144.71 5 A THR 15 -46.92 157.70 5 A ASN 21 -134.31 -40.11 5 A TRP 28 -155.45 55.99 5 A CYS 29 -172.00 -40.85 5 A ASP 30 -5.86 82.25 5 A ALA 31 -171.81 -62.88 5 A PHE 32 -178.92 61.33 5 A CYS 33 -58.06 -168.49 5 A SER 35 -178.52 -136.00 5 A VAL 39 152.11 103.01 5 A GLU 41 -164.37 86.53 5 A ALA 46 -89.21 44.09 5 A THR 47 91.42 175.70 5 A CYS 48 -170.71 98.38 5 A SER 50 51.57 101.33 5 A LYS 51 168.04 20.83 5 A LYS 52 164.48 63.86 5 A GLU 55 54.09 95.85 5 A GLU 56 165.57 -17.20 5 A THR 62 170.30 160.58 5 A ASP 63 -62.22 -139.67 5 A LYS 64 -38.52 65.79 5 A ASN 66 -144.94 39.32 5 A HIS 68 96.56 -70.24 5 A PRO 69 -60.43 -167.61 5 A LYS 70 78.14 -54.96 5 A ARG 72 54.67 95.70 5 A PRO 73 -75.21 -167.74 5 B PRO 179 -72.89 -167.17 5 B THR 183 -148.76 57.91 5 B GLU 188 -153.57 19.21 5 B CYS 189 -167.89 -63.01 5 B GLU 192 -142.25 -63.25 5 B PRO 195 -29.41 106.83 6 A CYS 3 -175.32 132.15 6 A HIS 4 -62.01 -179.84 6 A THR 6 15.97 -83.46 6 A ALA 7 158.49 33.24 6 A PRO 10 -86.13 38.11 6 A ILE 11 -26.16 141.82 6 A SER 12 -171.88 -66.48 6 A ALA 13 64.25 -155.99 6 A VAL 14 -158.61 -152.03 6 A THR 15 -49.70 -176.88 6 A GLU 20 -115.74 -168.61 6 A ASN 21 -159.56 20.03 6 A TRP 28 -86.31 -90.51 6 A ALA 31 -163.12 48.21 6 A PHE 32 58.50 111.12 6 A CYS 33 -158.97 28.17 6 A SER 34 -179.03 -166.70 6 A SER 35 -81.09 -79.16 6 A VAL 39 -24.96 -52.01 6 A VAL 40 48.20 171.36 6 A GLU 41 -170.73 77.11 6 A LEU 42 -44.71 162.19 6 A PRO 49 -72.09 -166.96 6 A SER 50 162.83 159.24 6 A LYS 51 170.74 65.63 6 A GLU 55 -172.27 108.73 6 A GLU 56 -160.29 -145.03 6 A CYS 59 -166.99 -163.88 6 A SER 61 -69.41 83.30 6 A THR 62 -167.68 -154.56 6 A ASP 63 -90.20 -139.39 6 A LYS 64 -66.34 60.20 6 A PRO 67 -52.41 91.47 6 A LYS 70 63.46 130.90 6 A GLN 71 -129.80 -168.61 6 B PRO 179 -63.86 -173.48 6 B THR 183 -109.58 -74.82 6 B GLU 184 9.45 67.09 6 B SER 185 -162.89 -156.43 6 B TYR 187 -129.29 -141.57 6 B CYS 189 168.79 -37.24 6 B CYS 190 -152.44 30.31 6 B LYS 191 -90.69 52.60 6 B GLU 192 55.22 -164.63 6 B PRO 193 -69.53 58.22 6 B TYR 194 99.15 -66.56 7 A HIS 4 -45.59 154.03 7 A THR 5 -56.97 -160.64 7 A SER 9 -177.22 -63.56 7 A ILE 11 -49.46 104.49 7 A SER 12 -109.45 -107.73 7 A ALA 13 170.84 101.20 7 A VAL 14 -106.50 -165.06 7 A PRO 17 -48.18 177.94 7 A ASN 21 173.84 83.10 7 A ASP 30 32.65 38.04 7 A ALA 31 -143.84 -74.30 7 A PHE 32 -130.19 -79.29 7 A CYS 33 53.94 -168.20 7 A SER 35 72.12 -83.93 7 A ARG 36 -108.06 46.08 7 A VAL 40 32.07 60.41 7 A GLU 41 -67.39 87.67 7 A CYS 48 171.62 66.57 7 A PRO 49 -64.69 -165.02 7 A LYS 51 -170.08 -160.16 7 A LYS 52 -107.18 75.40 7 A GLU 55 108.62 84.82 7 A GLU 56 -158.35 -138.58 7 A SER 61 -67.52 81.17 7 A THR 62 -167.63 -158.43 7 A ASP 63 -100.01 -148.21 7 A LYS 64 -43.20 66.69 7 A PRO 69 -45.22 97.14 7 B LYS 181 -140.37 -145.99 7 B ARG 182 -50.42 -179.83 7 B GLU 184 -45.64 -112.94 7 B SER 185 -167.61 -145.41 7 B TYR 187 -127.50 -143.53 7 B CYS 189 171.60 -38.33 7 B CYS 190 -157.95 40.48 7 B GLU 192 61.46 -144.05 7 B TYR 194 95.75 -81.18 8 A HIS 4 -36.05 153.41 8 A THR 5 -68.73 -167.48 8 A ALA 7 78.99 65.45 8 A SER 9 -171.47 -59.11 8 A SER 12 -124.81 -142.68 8 A ALA 13 -169.06 113.66 8 A ASN 21 -136.41 -57.11 8 A LEU 22 -58.30 179.09 8 A TRP 28 -161.99 68.65 8 A CYS 29 175.04 -31.22 8 A ASP 30 -34.73 103.39 8 A ALA 31 179.72 -45.59 8 A PHE 32 178.07 41.62 8 A SER 35 59.54 101.11 8 A ARG 36 82.64 -45.00 8 A LYS 38 -172.22 -77.32 8 A VAL 39 163.21 118.02 8 A THR 47 175.28 170.62 8 A CYS 48 -103.50 59.83 8 A PRO 49 -50.17 -163.99 8 A SER 50 177.12 138.24 8 A LYS 51 -178.59 40.37 8 A LYS 52 35.04 66.73 8 A GLU 55 -173.45 102.10 8 A GLU 56 -163.93 -147.11 8 A CYS 60 -174.24 110.79 8 A SER 61 5.82 -112.82 8 A THR 62 -148.71 -149.88 8 A ASP 63 47.28 105.72 8 A LYS 64 18.61 41.98 8 A LYS 70 -117.95 75.83 8 A GLN 71 -96.19 -159.96 8 A ARG 72 66.48 94.85 8 A PRO 73 -56.83 -161.83 8 B PRO 179 -56.34 -165.84 8 B ARG 182 -49.84 167.88 8 B GLU 184 -43.94 -72.71 8 B SER 185 -147.44 -152.99 8 B TYR 187 -79.49 -124.16 8 B CYS 189 167.14 -58.09 8 B CYS 190 -159.94 32.78 8 B GLU 192 89.68 160.18 8 B PRO 193 -38.89 112.41 8 B TYR 194 -49.81 102.48 8 B PRO 195 -92.23 -73.44 9 A CYS 3 -170.85 134.18 9 A THR 5 -67.98 -155.25 9 A SER 9 -175.66 -64.83 9 A SER 12 -140.18 -101.35 9 A ALA 13 171.59 107.63 9 A VAL 14 -78.74 -161.78 9 A CYS 16 -8.76 121.71 9 A PRO 17 -31.98 148.45 9 A GLU 20 -46.34 105.02 9 A ASN 21 -175.74 80.81 9 A TRP 28 177.47 74.61 9 A CYS 29 174.73 -36.74 9 A ASP 30 -20.41 107.56 9 A ALA 31 169.85 -69.89 9 A PHE 32 178.35 43.35 9 A CYS 33 -63.04 -167.72 9 A SER 35 168.83 151.76 9 A ARG 36 104.46 -1.48 9 A VAL 40 -151.35 73.02 9 A GLU 41 -69.28 77.94 9 A LEU 42 -46.83 170.47 9 A CYS 48 -103.23 75.81 9 A SER 50 -58.31 103.68 9 A TYR 54 76.03 -8.38 9 A GLU 55 163.27 95.76 9 A GLU 56 -166.06 -142.66 9 A SER 61 -46.63 89.61 9 A THR 62 -11.80 -136.61 9 A ASP 63 37.71 96.81 9 A LYS 64 23.69 45.81 9 A GLN 71 -60.88 -79.26 9 A ARG 72 -152.21 67.61 9 A PRO 73 -59.55 87.36 9 B PRO 179 -61.79 -164.03 9 B LYS 181 57.29 109.74 9 B ARG 182 54.32 108.72 9 B GLU 184 39.47 58.56 9 B TYR 187 -117.95 -98.50 9 B CYS 189 158.64 -62.91 9 B CYS 190 -160.73 12.94 9 B GLU 192 81.02 138.56 9 B PRO 193 -48.12 151.90 10 A HIS 4 -51.14 -179.23 10 A THR 5 -95.00 -158.20 10 A ALA 7 73.96 37.53 10 A SER 9 179.48 -62.42 10 A SER 12 -134.63 -99.07 10 A ALA 13 163.87 118.22 10 A VAL 14 -113.11 -153.96 10 A PRO 17 -39.06 166.66 10 A ASN 21 -143.82 10.41 10 A CYS 29 -139.69 -72.09 10 A ALA 31 -175.75 63.84 10 A PHE 32 62.80 96.73 10 A SER 34 55.78 124.79 10 A SER 35 70.36 129.74 10 A VAL 40 30.52 64.59 10 A GLU 41 -67.62 81.70 10 A CYS 48 -176.11 83.42 10 A PRO 49 -52.55 -163.82 10 A LYS 52 -114.68 65.39 10 A GLU 55 -166.42 111.52 10 A GLU 56 -167.39 -148.33 10 A SER 61 -26.49 -35.92 10 A ASP 63 107.13 150.51 10 A LYS 64 -57.56 60.52 10 B ARG 182 30.66 41.08 10 B THR 183 -145.40 49.36 10 B GLU 184 -116.79 -82.53 10 B SER 185 -178.43 -145.77 10 B TYR 187 -110.01 -136.70 10 B CYS 189 175.31 -39.47 10 B CYS 190 -155.63 18.10 10 B GLU 192 29.94 -89.60 10 B PRO 193 -84.44 36.30 10 B TYR 194 20.40 -81.86 NMR Structural Analysis of the Complex Formed Between alpha-Bungarotoxin and the Principal alpha-Neurotoxin Binding Sequence on the alpha7 Subunit of a Neuronal Nicotinic Acetylcholine Receptor 1 N N 2 N N disulf 2.032 A CYS 3 A SG CYS 3 1_555 A CYS 23 A SG CYS 23 1_555 disulf 2.032 A CYS 16 A SG CYS 16 1_555 A CYS 44 A SG CYS 44 1_555 disulf 2.034 A CYS 29 A SG CYS 29 1_555 A CYS 33 A SG CYS 33 1_555 disulf 2.031 A CYS 48 A SG CYS 48 1_555 A CYS 59 A SG CYS 59 1_555 disulf 2.028 A CYS 60 A SG CYS 60 1_555 A CYS 65 A SG CYS 65 1_555 disulf 2.062 B CYS 189 B SG CYS 12 1_555 B CYS 190 B SG CYS 13 1_555 TOXIN alpha-bungarotoxin, nicotinic acetylcholine receptor alpha 7 subunit, alpha-neurotoxin, ligand-gated ion channels, protein-protein interactions, protein-peptide complex, TOXIN NXL1A_BUNMU UNP 1 1 P60615 IVCHTTATSPISAVTCPPGENLCYRKMWCDAFCSSRGKVVELGCAATCPSKKPYEEVTCCSTDKCNPHPKQRPG ACHA7_CHICK UNP 2 201 P22770 IPGKRTESFYECCKEPYPD 1 74 1KC4 1 74 P60615 A 1 1 74 201 219 1KC4 178 196 P22770 B 2 1 19 2 engineered mutation HSL 197 1KC4 B P22770 UNP 20 3 anti-parallel anti-parallel A GLU 41 A GLU 41 A ALA 45 A ALA 45 A LEU 22 A LEU 22 A LYS 26 A LYS 26 A VAL 57 A VAL 57 A THR 58 A THR 58