1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 Pashkov, V.S. Maslennikov, I.V. Tchikin, L.D. Efremov, R.G. Ivanov, V.T. Arseniev, A.S. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 1 90.00 90.00 90.00 1.000 1.000 1.000 C4 H7 N O4 133.103 y ASPARTIC ACID 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 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 H2 N 16.023 AMINO GROUP non-polymer 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 C5 H11 N O2 117.146 y VALINE L-peptide linking NE FEBS Lett. FEBLAL 0165 0014-5793 457 117 10.1016/S0014-5793(99)01023-6 10486576 Spatial Structure of the M2 Transmembrane Segment of the Nicotinic Acetylcholine Receptor Alpha-Subunit 1999 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 THE C-TERMINAL RESIDUE OF THE PEPTIDE IS AMIDATED. THE COMPLETE RECEPTOR CONSISTS OF A PENTAMER OF TWO ALPHA CHAINS, AND ONE EACH OF THE BETA, DELTA, AND GAMMA CHAINS 3416.075 ACETYLCHOLINE RECEPTOR PROTEIN, ALPHA CHAIN M2 TRANSMEMBRANE SEGMENT 1 syn polymer no yes PTDSGEKMTLSISVLLSLTVFLLVIVELIPST(NH2) PTDSGEKMTLSISVLLSLTVFLLVIVELIPSTX A 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 repository Initial release Version format compliance Version format compliance 1 0 2000-02-02 1 1 2011-05-07 1 2 2011-07-13 ALPHA-BUNGAROTOXIN COMPLEXED WITH THE 185 - 196 FRAGMENT OF THE ALPHA-SUBUNIT OF THE TORPEDO NICOTINIC ACETYLCHOLINE RECEPTOR (NMR, 4 STRUCTURES) ACETYLCHOLINE RECEPTOR, MAIN IMMUNOGENIC REGION (NMR, 5 STRUCTURES) TORPEDO CALIFORNICA ACHR RECEPTOR [ALA76] ANALOGUE COMPLEXED WITH THE ANTI-ACETYLCHOLINE MAB6 MONOCLONAL ANTIBODY PDBE Y PDBE 2000-01-20 REL 7787 PACIFIC ELECTRIC RAY TORPEDO CALIFORNICA sample THE COMPLETE RECEPTOR CONSISTS OF A PENTAMER OF TWO ALPHA CHAINS, AND ONE EACH OF THE BETA, DELTA, AND GAMMA CHAINS. THE PEPTIDE STUDIED HERE REPRESENTS THE SECOND TRANS-MEMBRANE SEGMENT OF THE ALPHA CHAIN OF ACETYLCHOLINE RECEPTOR PROTEIN, ALPHA CHAIN (RESIDUES 267 TO 285) AMINO ACIDS NUMERATION IN THE ENTRY DOES NOT INCLUDE THE SIGNAL SEQUENCE. THE C-TERMINAL RESIDUE OF THIS ENTRY, THR267, IS AMIDATED. THE STRUCTURE WAS DETERMINED USING 2D-1H-NMR SPECTROSCOPY IN THE MEDIUM WHICH SHOULD BE ADEQUATE FOR THE M2 SEGMENT WITH ITS NON-LIPID SURROUNDING IN THE INTACT NICOTINIC ACTYLCHOLINE RECEPTOR. THE PH GIVEN IN THE EXPERIMENTAL DETAILS IS AN APPROXIMATION ONLY FOR THE MIXTURE OF ORGANIC SOLVENTS USED. LEAST RESTRAINTS VIOLATION 300 20 DQF-COSY TOCSY NOESY 0.1 M LICLO4 4.0 pH 1 atm 303 K REFINEMENT DETAILS CAN BE FOUND IN THE JRNL CITATION ABOVE. THE NMR STUDY HAS BEEN CONDUCTED USING THE SYNTHETIC PEPTIDE WITH METHIONINE 243 REPLACED BY NORLEUCINE. SUCH AN ISOSTERIC REPLACEMENT USUALLY DOES NOT AFFECT THE PEPTIDE CONFORMATION, WHILE SYMPLIFYING THE SYNTHESIS. TO AVOID DIFFICULTIES WHICH MAY ARISE FROM THE PRESENCE OF A NONSTANDARD AMINO ACID RESIDUE AS WELL AS FOR THE PURPOSE OF AGREEMENT BETWEEN THE NATIVE M2 FRAGMENT AND THE CONFORMERS TO BE DEPOSITED, THE NORLEUCINE RESIDUE WAS REPLACED BY METHIONINE. distance geometry 4 CDCL3/CD3OH=1/1 WITH 0.1 M LICLO4 R.FRACZKIEWICZ,C.MUMENTHALER,B. VON FREYBERG, T.SCHAUMANN,W.BRAUN refinement FANTOM 4.0 structure solution VARIAN VNMR VNMR structure solution XEASY structure solution DYANA structure solution MARDIGRAS 600 Varian UNITY PRO 236 n 1 PRO 236 A THR 237 n 2 THR 237 A ASP 238 n 3 ASP 238 A SER 239 n 4 SER 239 A GLY 240 n 5 GLY 240 A GLU 241 n 6 GLU 241 A LYS 242 n 7 LYS 242 A MET 243 n 8 MET 243 A THR 244 n 9 THR 244 A LEU 245 n 10 LEU 245 A SER 246 n 11 SER 246 A ILE 247 n 12 ILE 247 A SER 248 n 13 SER 248 A VAL 249 n 14 VAL 249 A LEU 250 n 15 LEU 250 A LEU 251 n 16 LEU 251 A SER 252 n 17 SER 252 A LEU 253 n 18 LEU 253 A THR 254 n 19 THR 254 A VAL 255 n 20 VAL 255 A PHE 256 n 21 PHE 256 A LEU 257 n 22 LEU 257 A LEU 258 n 23 LEU 258 A VAL 259 n 24 VAL 259 A ILE 260 n 25 ILE 260 A VAL 261 n 26 VAL 261 A GLU 262 n 27 GLU 262 A LEU 263 n 28 LEU 263 A ILE 264 n 29 ILE 264 A PRO 265 n 30 PRO 265 A SER 266 n 31 SER 266 A THR 267 n 32 THR 267 A NH2 268 n 33 NH2 268 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 1 A SER 239 -159.28 70.61 2 A SER 239 -147.13 -58.57 2 A GLU 241 71.32 -67.07 2 A SER 266 -171.12 -47.85 3 A ASP 238 171.04 -46.85 4 A ASP 238 163.95 126.23 4 A SER 266 179.28 -64.74 5 A ASP 238 -162.51 -55.91 5 A SER 266 179.24 -44.59 6 A ASP 238 -159.20 -58.45 7 A SER 239 -150.63 -62.75 7 A SER 266 178.73 -51.88 8 A ASP 238 162.24 -39.96 8 A SER 239 -73.63 -71.85 8 A GLU 241 68.47 -123.23 9 A THR 237 47.50 -168.54 9 A ASP 238 173.96 -65.44 9 A GLU 241 64.22 -79.99 9 A SER 266 179.21 -53.14 10 A THR 237 65.38 146.60 10 A ASP 238 -115.68 -86.37 10 A SER 266 178.79 -48.09 11 A THR 237 62.71 102.16 11 A SER 239 -146.30 45.78 11 A GLU 241 53.49 -91.64 11 A SER 266 178.71 -51.01 12 A SER 239 -110.51 -74.68 12 A GLU 241 64.96 -115.47 13 A THR 237 65.98 144.76 13 A ASP 238 178.14 -53.99 13 A SER 266 -166.14 -54.34 14 A GLU 241 63.26 -78.75 15 A SER 266 -164.36 -49.81 16 A SER 239 84.82 -50.23 16 A GLU 241 65.24 -126.73 17 A THR 237 38.33 77.04 17 A ASP 238 -170.35 -53.25 17 A GLU 241 82.04 -60.58 17 A SER 266 -156.24 -50.78 18 A THR 237 -153.65 -157.99 18 A ASP 238 -89.39 34.61 18 A GLU 241 60.23 -88.19 18 A SER 266 179.11 -53.12 19 A THR 237 63.90 164.52 19 A ASP 238 -85.20 45.94 19 A SER 239 87.50 -45.74 19 A SER 266 179.70 -51.79 20 A THR 237 64.14 115.72 20 A ASP 238 -77.41 -73.08 20 A SER 239 -173.40 41.81 20 A GLU 241 69.15 -126.33 20 A SER 266 -163.88 -52.79 ACETYLCHOLINE RECEPTOR PROTEIN, ALPHA CHAIN M2 TRANSMEMBRANE SEGMENT OF ALPHA-SUBUNIT OF NICOTINIC ACETYLCHOLINE RECEPTOR FROM TORPEDO CALIFORNICA, NMR, 20 STRUCTURES 1 N N A GLU 241 A GLU 6 HELX_P A LEU 263 A LEU 28 1 1 23 covale 1.325 A THR 267 A C THR 32 1_555 A NH2 268 A N NH2 33 1_555 TRANSMEMBRANE PROTEIN TRANSMEMBRANE PROTEIN, NICOTINIC ACETYLCHOLINE RECEPTOR, TRANSMEMBRANE SEGMENT, M2, ION-CHANNEL ACHA_TORCA UNP 1 P02710 260 291 1DXZ 236 267 P02710 A 1 1 32 1 P 1