1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 Zeng, H. 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 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 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 37439 37445 10.1074/jbc.M205483200 12133834 NMR-based Binding Screen and Structural Analysis of the Complex Formed between alpha-Cobratoxin and an 18-mer Cognate Peptide Derived from the alpha1 Subunit of the Nicotinic Acetylcholine Receptor from Torpedo californica 2002 10.2210/pdb1lxg/pdb pdb_00001lxg 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 7842.094 Long neurotoxin 1 1 nat polymer 2424.732 Acetylcholine receptor protein, alpha chain 1 man polymer Neurotoxin 3, Alpha-cobratoxin no no IRCFITPDITSKDCPNGHVCYTKTWCDAFCSIRGKRVDLGCAATCPTVKTGVDIQCCSTDNCNPFPTRKRP IRCFITPDITSKDCPNGHVCYTKTWCDAFCSIRGKRVDLGCAATCPTVKTGVDIQCCSTDNCNPFPTRKRP A polypeptide(L) no yes YRGWKHWVYYTCCPDTPY(HSL) YRGWKHWVYYTCCPDTPYS 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 Pacific electric ray Torpedo Escherichia Escherichia coli sample 7787 Torpedo californica 469008 Escherichia coli BL21(DE3) BL21 (DE3) plasmid PET-31B(+) monocled cobra Naja sample 8649 Naja kaouthia 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 2002-11-20 1 1 2008-04-28 1 2 2011-07-13 1 3 2022-02-23 _database_2.pdbx_DOI _database_2.pdbx_database_accession _pdbx_nmr_software.name _pdbx_nmr_spectrometer.model _struct_ref_seq_dif.details 1lxh is the minimized average structure. RCSB Y RCSB 2002-06-05 REL structures with the lowest energy 100 10 HSQC 3D TOCSY-HSQC 3D NOESY-HSQC HNHA 2D TOCSY 2D NOESY 4.0 AMBIENT 308 K distance geometry and simulated annealing 5 lowest energy 1.6 mM alpha-cobratoxin/alpha18-mer complex, alpha18-mer is U-15N, 50 mM perdeuterated potassium acetate buffer (pH 4.0) with 5% D2O and 0.05% sodium azide 95% H2O/5% D2O Bruker collection XwinNMR 3.0 Delaglio, F. et al. processing NMRPipe 1.8 Goddard, T.D. et al. data analysis Sparky 3.95 Brunger, A.T. et al. refinement CNS 1.1 600 Bruker AVANCE ILE 1 n 1 ILE 1 A ARG 2 n 2 ARG 2 A CYS 3 n 3 CYS 3 A PHE 4 n 4 PHE 4 A ILE 5 n 5 ILE 5 A THR 6 n 6 THR 6 A PRO 7 n 7 PRO 7 A ASP 8 n 8 ASP 8 A ILE 9 n 9 ILE 9 A THR 10 n 10 THR 10 A SER 11 n 11 SER 11 A LYS 12 n 12 LYS 12 A ASP 13 n 13 ASP 13 A CYS 14 n 14 CYS 14 A PRO 15 n 15 PRO 15 A ASN 16 n 16 ASN 16 A GLY 17 n 17 GLY 17 A HIS 18 n 18 HIS 18 A VAL 19 n 19 VAL 19 A CYS 20 n 20 CYS 20 A TYR 21 n 21 TYR 21 A THR 22 n 22 THR 22 A LYS 23 n 23 LYS 23 A THR 24 n 24 THR 24 A TRP 25 n 25 TRP 25 A CYS 26 n 26 CYS 26 A ASP 27 n 27 ASP 27 A ALA 28 n 28 ALA 28 A PHE 29 n 29 PHE 29 A CYS 30 n 30 CYS 30 A SER 31 n 31 SER 31 A ILE 32 n 32 ILE 32 A ARG 33 n 33 ARG 33 A GLY 34 n 34 GLY 34 A LYS 35 n 35 LYS 35 A ARG 36 n 36 ARG 36 A VAL 37 n 37 VAL 37 A ASP 38 n 38 ASP 38 A LEU 39 n 39 LEU 39 A GLY 40 n 40 GLY 40 A CYS 41 n 41 CYS 41 A ALA 42 n 42 ALA 42 A ALA 43 n 43 ALA 43 A THR 44 n 44 THR 44 A CYS 45 n 45 CYS 45 A PRO 46 n 46 PRO 46 A THR 47 n 47 THR 47 A VAL 48 n 48 VAL 48 A LYS 49 n 49 LYS 49 A THR 50 n 50 THR 50 A GLY 51 n 51 GLY 51 A VAL 52 n 52 VAL 52 A ASP 53 n 53 ASP 53 A ILE 54 n 54 ILE 54 A GLN 55 n 55 GLN 55 A CYS 56 n 56 CYS 56 A CYS 57 n 57 CYS 57 A SER 58 n 58 SER 58 A THR 59 n 59 THR 59 A ASP 60 n 60 ASP 60 A ASN 61 n 61 ASN 61 A CYS 62 n 62 CYS 62 A ASN 63 n 63 ASN 63 A PRO 64 n 64 PRO 64 A PHE 65 n 65 PHE 65 A PRO 66 n 66 PRO 66 A THR 67 n 67 THR 67 A ARG 68 n 68 ARG 68 A LYS 69 n 69 LYS 69 A ARG 70 n 70 ARG 70 A PRO 71 n 71 PRO 71 A TYR 181 n 1 TYR 181 B ARG 182 n 2 ARG 182 B GLY 183 n 3 GLY 183 B TRP 184 n 4 TRP 184 B LYS 185 n 5 LYS 185 B HIS 186 n 6 HIS 186 B TRP 187 n 7 TRP 187 B VAL 188 n 8 VAL 188 B TYR 189 n 9 TYR 189 B TYR 190 n 10 TYR 190 B THR 191 n 11 THR 191 B CYS 192 n 12 CYS 192 B CYS 193 n 13 CYS 193 B PRO 194 n 14 PRO 194 B ASP 195 n 15 ASP 195 B THR 196 n 16 THR 196 B PRO 197 n 17 PRO 197 B TYR 198 n 18 TYR 198 B n 19 199 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 x,y,z identity operation 0.0000000000 0.0000000000 0.0000000000 A N CYS 20 A N CYS 20 A O CYS 57 A O CYS 57 1 B HSL 199 B HSL 19 1 Y 2 B HSL 199 B HSL 19 1 Y 3 B HSL 199 B HSL 19 1 Y 4 B HSL 199 B HSL 19 1 Y 5 B HSL 199 B HSL 19 1 Y 6 B HSL 199 B HSL 19 1 Y 7 B HSL 199 B HSL 19 1 Y 8 B HSL 199 B HSL 19 1 Y 9 B HSL 199 B HSL 19 1 Y 10 B HSL 199 B HSL 19 1 Y 9 A A HG1 O THR ASP 24 53 1.58 1 A ARG 2 72.68 39.08 1 A CYS 3 -60.68 -81.13 1 A PHE 4 -153.57 -85.19 1 A ILE 5 -68.38 -167.18 1 A PRO 7 -55.25 -77.69 1 A SER 11 78.90 -58.94 1 A LYS 12 -76.99 -164.00 1 A ASP 13 -158.53 52.56 1 A CYS 14 53.59 167.36 1 A TRP 25 -100.24 67.46 1 A ASP 27 47.54 -89.82 1 A CYS 30 49.44 -174.52 1 A SER 31 -110.71 -90.41 1 A ILE 32 -81.55 -154.52 1 A ARG 33 -73.32 33.59 1 A ASP 38 22.56 58.30 1 A LEU 39 -30.91 -37.98 1 A CYS 41 93.99 63.11 1 A ALA 42 -166.04 -154.85 1 A CYS 45 -43.04 97.42 1 A THR 47 156.46 -54.02 1 A VAL 48 27.35 -148.77 1 A LYS 49 67.44 -154.77 1 A THR 50 42.75 91.64 1 A CYS 57 -170.02 139.99 1 A THR 59 65.11 -153.56 1 A ASP 60 66.50 67.79 1 A ASN 61 88.21 30.09 1 A PRO 64 -43.88 94.96 1 A PRO 66 -54.79 -73.18 1 A ARG 70 -164.79 88.79 1 B ARG 182 -154.99 -89.94 1 B VAL 188 -76.65 -97.94 1 B TYR 189 60.39 158.08 1 B TYR 190 74.27 -69.94 1 B THR 191 171.44 118.41 1 B CYS 192 169.53 -40.86 1 B PRO 194 -83.81 -150.40 1 B ASP 195 -29.76 132.79 1 B THR 196 -81.95 -74.50 2 A ILE 5 46.07 78.81 2 A THR 6 62.52 139.37 2 A PRO 7 -68.72 -88.56 2 A ILE 9 179.79 -73.42 2 A THR 10 177.42 -74.81 2 A ASP 13 64.01 154.47 2 A ASN 16 -55.72 102.82 2 A HIS 18 -156.44 -66.93 2 A TRP 25 -130.02 -72.96 2 A CYS 26 33.18 38.55 2 A ASP 27 94.58 -168.76 2 A CYS 30 -58.94 -161.57 2 A SER 31 -178.43 75.35 2 A ARG 33 70.19 -66.99 2 A VAL 37 -113.87 -133.83 2 A ASP 38 70.19 119.65 2 A LEU 39 176.80 -159.42 2 A CYS 41 175.33 78.65 2 A THR 47 166.43 -108.04 2 A LYS 49 -125.29 -141.88 2 A PRO 64 -88.19 -155.11 2 A THR 67 46.47 -166.04 2 A ARG 68 -69.03 79.34 2 A LYS 69 43.01 -169.33 2 A ARG 70 77.18 148.45 2 B ARG 182 -54.49 91.68 2 B HIS 186 -160.25 88.73 2 B VAL 188 52.89 -134.25 2 B TYR 189 79.27 108.69 2 B TYR 190 88.23 17.11 2 B THR 191 95.74 148.60 2 B CYS 192 151.58 -61.12 2 B PRO 194 -68.67 46.08 3 A ARG 2 -176.47 36.94 3 A CYS 3 -67.68 76.30 3 A PHE 4 75.16 -63.75 3 A ILE 5 -155.36 -158.82 3 A PRO 7 -53.42 -81.84 3 A ASP 8 -59.16 -77.90 3 A ILE 9 -61.90 -157.06 3 A THR 10 -155.17 32.04 3 A SER 11 -146.66 -43.24 3 A LYS 12 -56.83 -164.41 3 A ASN 16 69.13 135.66 3 A THR 22 -62.96 73.71 3 A TRP 25 -103.93 57.26 3 A ASP 27 56.84 -164.09 3 A ALA 28 -54.79 -71.32 3 A PHE 29 -68.66 69.02 3 A VAL 37 77.86 161.50 3 A ASP 38 93.42 50.80 3 A LEU 39 178.47 156.16 3 A ALA 42 155.11 -179.90 3 A ALA 43 44.15 -166.87 3 A THR 44 -132.64 -93.37 3 A CYS 45 -154.34 46.36 3 A PRO 46 -89.64 47.96 3 A THR 47 166.55 -102.03 3 A THR 50 41.54 -135.34 3 A GLN 55 -63.54 80.44 3 A ASP 60 158.87 -34.45 3 A ASN 61 -149.94 50.15 3 A CYS 62 -55.22 90.16 3 A ASN 63 -175.20 48.57 3 A PHE 65 60.20 96.04 3 A PRO 66 -59.38 108.81 3 B ARG 182 75.00 -59.60 3 B TRP 184 -142.51 -41.79 3 B TRP 187 -160.94 83.67 3 B VAL 188 -67.85 -98.45 3 B TYR 189 62.47 154.83 3 B TYR 190 76.58 -2.73 3 B THR 191 59.04 152.42 3 B CYS 192 176.02 -49.02 3 B CYS 193 -159.53 -62.17 4 A ARG 2 -53.81 -73.20 4 A CYS 3 69.78 -56.43 4 A PHE 4 -119.65 59.36 4 A ILE 5 38.81 -87.90 4 A PRO 7 -96.96 52.96 4 A ASP 8 74.83 146.56 4 A ILE 9 46.81 -95.28 4 A THR 10 -131.25 -65.35 4 A SER 11 -121.39 -125.15 4 A LYS 12 82.19 -49.68 4 A ASP 13 84.68 -8.59 4 A CYS 14 38.44 91.99 4 A HIS 18 -141.28 19.71 4 A TRP 25 -126.92 -73.74 4 A ASP 27 -38.16 119.37 4 A ALA 28 13.51 103.69 4 A PHE 29 85.40 -32.11 4 A CYS 30 65.58 -72.15 4 A SER 31 170.31 -65.44 4 A ILE 32 -123.44 -162.05 4 A LYS 35 -147.33 19.91 4 A ARG 36 70.69 -58.03 4 A VAL 37 83.22 39.17 4 A ASP 38 -162.57 -39.83 4 A CYS 41 173.62 61.78 4 A ALA 42 -135.60 -46.45 4 A ALA 43 69.73 -164.83 4 A THR 44 83.23 -54.82 4 A CYS 45 61.39 61.99 4 A THR 47 -116.68 -83.61 4 A LYS 49 -154.07 -159.73 4 A THR 50 53.39 -140.58 4 A CYS 56 -64.01 80.83 4 A SER 58 -123.47 -64.15 4 A THR 59 36.03 32.25 4 A ASP 60 70.08 -57.05 4 A ASN 61 -106.54 -71.39 4 A CYS 62 57.12 110.58 4 A ASN 63 162.04 118.12 4 A PHE 65 59.88 156.48 4 A THR 67 -160.91 95.00 4 A LYS 69 67.72 -70.90 4 A ARG 70 172.67 -53.88 4 B ARG 182 59.66 -151.53 4 B TRP 184 -145.85 -77.36 4 B HIS 186 -160.13 32.32 4 B TRP 187 -160.51 64.88 4 B THR 191 78.80 136.55 4 B CYS 192 164.93 -42.07 4 B PRO 194 -38.20 171.24 4 B ASP 195 -34.91 156.16 5 A ARG 2 42.53 86.58 5 A PHE 4 -132.59 -84.00 5 A ILE 5 -141.75 59.26 5 A THR 6 69.31 142.72 5 A ASP 8 58.74 -84.73 5 A LYS 12 64.45 101.72 5 A ASN 16 -168.31 109.99 5 A CYS 20 -64.80 79.32 5 A TYR 21 -68.75 90.13 5 A ALA 28 78.47 -59.18 5 A PHE 29 -74.97 -76.72 5 A CYS 30 78.11 -79.86 5 A SER 31 41.81 72.57 5 A ILE 32 -121.26 -126.34 5 A ARG 36 61.84 111.86 5 A VAL 37 43.20 71.83 5 A ASP 38 -39.18 133.61 5 A LEU 39 -78.68 -159.10 5 A CYS 41 -162.97 66.54 5 A THR 44 46.39 -163.38 5 A PRO 46 -52.79 -71.51 5 A THR 47 -132.18 -41.87 5 A THR 50 50.03 -167.53 5 A VAL 52 -65.94 93.91 5 A CYS 56 -59.38 88.86 5 A THR 59 -64.87 -157.52 5 A CYS 62 64.13 87.64 5 A ASN 63 158.64 146.45 5 A ARG 68 -173.79 -165.52 5 B ARG 182 63.53 140.19 5 B TRP 184 -96.75 -83.71 5 B VAL 188 -156.71 -86.74 5 B TYR 189 64.44 133.71 5 B TYR 190 60.50 131.98 5 B THR 191 -35.51 118.87 5 B CYS 192 175.03 -42.20 6 A ARG 2 63.40 178.51 6 A PHE 4 48.90 134.66 6 A ILE 5 34.99 103.57 6 A ASP 8 57.28 145.40 6 A ILE 9 58.70 162.46 6 A THR 10 -64.32 -84.36 6 A SER 11 47.81 -160.38 6 A LYS 12 -145.30 -42.66 6 A HIS 18 -163.43 -76.00 6 A CYS 20 -68.08 70.39 6 A TYR 21 -68.36 82.70 6 A ASP 27 69.89 -65.44 6 A ALA 28 -166.34 -45.65 6 A CYS 30 41.42 94.01 6 A SER 31 -151.97 68.73 6 A ARG 33 64.75 -73.72 6 A ARG 36 -91.21 -74.52 6 A ASP 38 -58.27 -167.89 6 A LEU 39 -132.13 -69.73 6 A CYS 41 84.41 77.69 6 A ALA 43 -57.74 175.16 6 A CYS 45 -38.71 93.97 6 A PRO 46 -100.46 -63.32 6 A THR 47 -74.30 -86.98 6 A LYS 49 -154.56 -157.32 6 A THR 50 46.56 -167.95 6 A VAL 52 -164.37 107.52 6 A SER 58 -140.25 50.28 6 A ASN 61 -143.50 -71.93 6 A CYS 62 75.22 112.29 6 A ASN 63 159.83 70.28 6 A PRO 64 -68.46 80.96 6 A PHE 65 42.12 91.91 6 A THR 67 -95.93 -87.29 6 A ARG 68 57.97 113.97 6 B TRP 184 -138.38 -110.93 6 B TRP 187 -160.56 -68.30 6 B VAL 188 104.21 -58.07 6 B TYR 189 -8.36 123.44 6 B TYR 190 158.73 -10.09 6 B THR 191 79.37 95.56 6 B CYS 192 -161.47 -66.97 6 B CYS 193 -141.07 -85.44 7 A ARG 2 59.12 82.06 7 A CYS 3 -77.15 -74.17 7 A PHE 4 -163.45 -164.21 7 A PRO 7 -75.65 -154.38 7 A ILE 9 -127.99 -106.51 7 A THR 10 -152.77 -35.74 7 A SER 11 -53.76 -80.40 7 A ASN 16 -104.97 -155.05 7 A HIS 18 178.70 -160.20 7 A CYS 20 -61.97 85.32 7 A TRP 25 -122.80 -84.29 7 A CYS 26 164.06 -23.27 7 A ALA 28 79.59 95.27 7 A CYS 30 52.70 108.97 7 A SER 31 -47.08 -92.26 7 A ILE 32 -86.17 -106.59 7 A ARG 33 -59.14 -79.36 7 A LYS 35 45.54 74.49 7 A ARG 36 -60.67 83.32 7 A VAL 37 81.49 -8.78 7 A ASP 38 48.77 105.46 7 A LEU 39 -44.21 -85.37 7 A CYS 41 -157.53 85.22 7 A THR 44 162.17 153.95 7 A CYS 45 -144.45 53.78 7 A THR 47 48.32 23.28 7 A LYS 49 178.27 -146.02 7 A THR 50 50.86 -88.67 7 A SER 58 -92.56 55.82 7 A THR 59 64.50 -150.84 7 A ASN 61 168.82 -26.47 7 A THR 67 -138.44 -45.32 7 A ARG 68 48.00 87.19 7 A LYS 69 57.26 -85.77 7 A ARG 70 175.70 -60.94 7 B ARG 182 -114.10 -84.84 7 B HIS 186 -108.18 53.24 7 B TRP 187 -160.46 71.49 7 B VAL 188 -96.45 -129.94 7 B TYR 189 168.01 -51.04 7 B THR 191 -45.66 156.97 7 B CYS 192 159.50 -58.74 7 B PRO 194 -48.15 -86.95 7 B PRO 197 -59.92 -76.19 8 A ARG 2 -178.34 50.82 8 A PHE 4 60.58 -170.27 8 A ILE 5 -79.67 -97.54 8 A THR 6 177.00 135.63 8 A ASP 8 52.81 105.51 8 A ILE 9 57.05 148.85 8 A SER 11 63.71 -170.66 8 A LYS 12 -83.19 -73.29 8 A PRO 15 -61.63 -95.48 8 A ASN 16 49.48 25.46 8 A HIS 18 173.30 31.34 8 A VAL 19 178.00 126.15 8 A CYS 20 -69.65 92.44 8 A THR 22 -64.01 72.62 8 A ASP 27 65.81 -68.74 8 A ALA 28 -155.75 -44.77 8 A CYS 30 -47.79 158.65 8 A SER 31 -178.40 61.45 8 A ASP 38 177.91 105.00 8 A LEU 39 171.58 -127.10 8 A CYS 41 82.95 81.17 8 A THR 44 62.78 138.94 8 A PRO 46 -39.18 -76.91 8 A THR 47 -178.23 11.34 8 A VAL 48 63.06 96.94 8 A LYS 49 169.34 -154.76 8 A SER 58 -149.55 46.06 8 A ASP 60 67.86 -67.23 8 A ASN 61 -92.79 48.50 8 A CYS 62 -74.37 -147.15 8 A ASN 63 61.22 116.28 8 A PHE 65 60.12 107.04 8 A PRO 66 -55.44 108.97 8 A ARG 68 -98.09 -85.72 8 A ARG 70 -175.82 -62.34 8 B ARG 182 -143.57 -69.09 8 B TRP 184 -156.14 -158.53 8 B LYS 185 -49.87 104.75 8 B TYR 189 70.30 152.92 8 B TYR 190 77.40 149.71 8 B CYS 193 -153.38 -57.66 9 A ARG 2 -170.43 32.41 9 A PHE 4 60.55 114.99 9 A ILE 5 7.02 -86.23 9 A THR 6 -174.26 81.50 9 A ASP 8 63.55 124.29 9 A ILE 9 44.47 -154.22 9 A SER 11 23.23 -128.66 9 A LYS 12 -128.96 -61.56 9 A ASP 13 -168.20 43.00 9 A CYS 14 70.57 132.74 9 A ASN 16 -117.15 -75.98 9 A HIS 18 69.31 -84.19 9 A CYS 20 -67.35 79.69 9 A THR 22 -64.77 71.19 9 A ASP 27 53.07 -85.91 9 A ALA 28 -122.36 -50.76 9 A PHE 29 -152.03 23.51 9 A CYS 30 59.73 116.68 9 A ILE 32 -79.04 -159.45 9 A ARG 36 45.19 -90.36 9 A ASP 38 166.36 83.32 9 A LEU 39 -68.04 -178.24 9 A CYS 41 75.25 71.01 9 A ALA 42 174.48 156.13 9 A ALA 43 45.63 -172.81 9 A THR 44 -144.67 43.01 9 A CYS 45 70.26 58.23 9 A THR 47 -172.00 27.54 9 A VAL 48 -53.74 79.61 9 A LYS 49 -173.16 -153.99 9 A THR 50 55.18 -158.69 9 A SER 58 -95.46 49.21 9 A THR 59 61.62 -169.76 9 A ASN 61 175.46 37.70 9 A CYS 62 -117.26 -80.23 9 A ASN 63 -161.56 53.78 9 A ARG 68 -145.59 -46.33 9 A LYS 69 -57.97 -159.13 9 B TRP 184 -91.82 -71.42 9 B TYR 189 -51.15 105.01 9 B TYR 190 170.06 -31.90 9 B THR 191 166.42 105.69 9 B CYS 192 176.46 -48.20 9 B PRO 194 -54.95 -88.29 9 B PRO 197 -62.47 -166.93 10 A PHE 4 42.78 -95.75 10 A ILE 5 -132.02 -78.54 10 A PRO 7 -53.03 -159.44 10 A ASP 8 -27.38 123.31 10 A ILE 9 57.97 158.44 10 A CYS 14 49.39 178.85 10 A HIS 18 -175.12 -68.91 10 A THR 22 -69.38 71.70 10 A ASP 27 64.63 -74.31 10 A ALA 28 -151.90 -68.96 10 A CYS 30 52.31 98.22 10 A SER 31 -167.19 -91.42 10 A ARG 33 71.28 -59.20 10 A LYS 35 -44.92 -79.15 10 A ARG 36 45.92 29.66 10 A ASP 38 160.67 54.94 10 A LEU 39 -147.32 -72.33 10 A CYS 41 75.89 76.38 10 A ALA 42 178.44 -89.57 10 A ALA 43 162.81 -170.11 10 A THR 44 66.09 103.24 10 A VAL 48 -78.22 40.79 10 A LYS 49 -140.31 -68.95 10 A THR 50 -39.98 88.56 10 A SER 58 -100.80 74.07 10 A ARG 68 -133.65 -71.61 10 B ARG 182 -81.43 -71.37 10 B VAL 188 -135.80 -71.03 10 B TYR 189 62.23 102.43 10 B TYR 190 155.94 -77.73 10 B THR 191 170.28 56.51 10 B ASP 195 -43.40 -84.00 10 B PRO 197 -93.66 -72.28 Solution structure of alpha-cobratoxin complexed with a cognate peptide (structure ensemble) 1 N N 2 N N disulf 2.032 A CYS 3 A SG CYS 3 1_555 A CYS 20 A SG CYS 20 1_555 disulf 2.030 A CYS 14 A SG CYS 14 1_555 A CYS 41 A SG CYS 41 1_555 disulf 2.032 A CYS 26 A SG CYS 26 1_555 A CYS 30 A SG CYS 30 1_555 disulf 2.031 A CYS 45 A SG CYS 45 1_555 A CYS 56 A SG CYS 56 1_555 disulf 2.034 A CYS 57 A SG CYS 57 1_555 A CYS 62 A SG CYS 62 1_555 disulf 2.056 B CYS 192 B SG CYS 12 1_555 B CYS 193 B SG CYS 13 1_555 TOXIN toxin, alpha-cobratoxin, nicotinic acetylcholine receptor, protein-protein interaction NXL1_NAJKA UNP 1 1 P01391 IRCFITPDITSKDCPNGHVCYTKTWCDAFCSIRGKRVDLGCAATCPTVKTGVDIQCCSTDNCNPFPTRKRP ACHA_TORCA UNP 2 205 P02710 YRGWKHWVYYTCCPDTPY 1 71 1LXG 1 71 P01391 A 1 1 71 205 222 1LXG 181 198 P02710 B 2 1 18 2 cloning artifact HSL 199 1LXG B P02710 UNP 19 2 anti-parallel A CYS 20 A CYS 20 A TYR 21 A TYR 21 A CYS 56 A CYS 56 A CYS 57 A CYS 57