1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 Marassi, F.M. Gesell, J.J. Kim, Y. Valente, A.P. Oblatt-Montal, M. Montal, M. Opella, S.J. 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 C5 H10 N2 O3 146.144 y GLUTAMINE L-peptide linking C5 H9 N O4 147.129 y GLUTAMIC ACID 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 H O -1 17.007 HYDROXIDE ION non-polymer C9 H11 N O2 165.189 y PHENYLALANINE 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 US Nat.Struct.Biol. NSBIEW 2024 1072-8368 6 374 379 10.1038/7610 10201407 Structures of the M2 channel-lining segments from nicotinic acetylcholine and NMDA receptors by NMR spectroscopy. 1999 NE J.BIOMOL.NMR JBNME9 0800 0925-2738 14 141 148 10.1023/A:1008391823293 Dilute Spin-Exchange Assignment of Solid-State NMR Spectra of Oriented Proteins: Acetylcholine M2 in Bilayers 1999 10.2210/pdb1eq8/pdb pdb_00001eq8 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 2522.013 ACETYLCHOLINE RECEPTOR PROTEIN M2 SEGMENT 5 man polymer 17.007 HYDROXIDE ION 1 syn non-polymer ACHR M2 no no EKMSTAISVLLAQAVFLLLTSQR EKMSTAISVLLAQAVFLLLTSQR A,B,C,D,E 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 Pacific electric ray Torpedo Escherichia Escherichia coli sample NEURON POST-SYNAPTIC MEMBRANE 7787 BRAIN Torpedo californica 511693 Escherichia coli BL21 BL21 PMAL database_2 pdbx_nmr_software pdbx_struct_assembly pdbx_struct_oper_list struct_conn struct_site repository Initial release Version format compliance Version format compliance Data collection Database references Derived calculations 1 0 2000-04-26 1 1 2008-04-27 1 2 2011-07-13 1 3 2022-02-16 _database_2.pdbx_DOI _database_2.pdbx_database_accession _pdbx_nmr_software.name _struct_conn.pdbx_leaving_atom_flag _struct_site.pdbx_auth_asym_id _struct_site.pdbx_auth_comp_id _struct_site.pdbx_auth_seq_id SOLUTION NMR COORDINATES OF THE MONOMERIC ACHR M2 HELIX SOLID-STATE NMR COORDINATES OF THE MONOMERIC ACHR M2 HELIX IN THE MEMBRANE RCSB Y RCSB 2000-04-03 REL OH HYDROXIDE ION The orientation of each monomer in the pentameric bundle was obtained from the combination of the solution NMR (PDB file 1a11) and solid-state NMR (PDB file 1cek) structures structures with favorable non-bond energy 30 1 HSQC; HNCA; HNCOCA; 3D 15N- and 13C-edited NOESY; 3D 15N- and 13C-edited TOCSY; 3D HNHA 1D CPMOIST; 2D 1H/1H-15N PISEMA; 2D 1H/15N HETCOR; 5.5 ambient 303 K 5.5 ambient 298 K The backbone coordinates obtained from solution NMR were superimposed on the coordinates obtained from solid-state NMR to fix the helix orientation and rotation in the membrane. The pentameric array was then optimized using molecular dynamics. Pore contours were calculated with the program HOLE. X-PLOR 3.1, distance geometry, simulated annealing, molecular dynamics, FISI, FINGERPRINT, HOLE minimized average structure 1mM M2 U-15N; 350mM DPC; pH5.5; 90% H2O/10% D2O 20mg M2 U-15N; 40mg DMPC; DMPC bilayers in H2O; Brunger refinement X-PLOR 3.01 Marassi structure solution FISI 1.01 Smart, Goodfellow, Wallace structure solution HOLE data analysis Felix 95 750 Bruker DMX 600 Bruker DMX 400 Chemagnetics CMX OH 24 2 OH OH 24 E GLU 1 n 1 GLU 1 A LYS 2 n 2 LYS 2 A MET 3 n 3 MET 3 A SER 4 n 4 SER 4 A THR 5 n 5 THR 5 A ALA 6 n 6 ALA 6 A ILE 7 n 7 ILE 7 A SER 8 n 8 SER 8 A VAL 9 n 9 VAL 9 A LEU 10 n 10 LEU 10 A LEU 11 n 11 LEU 11 A ALA 12 n 12 ALA 12 A GLN 13 n 13 GLN 13 A ALA 14 n 14 ALA 14 A VAL 15 n 15 VAL 15 A PHE 16 n 16 PHE 16 A LEU 17 n 17 LEU 17 A LEU 18 n 18 LEU 18 A LEU 19 n 19 LEU 19 A THR 20 n 20 THR 20 A SER 21 n 21 SER 21 A GLN 22 n 22 GLN 22 A ARG 23 n 23 ARG 23 A GLU 1 n 1 GLU 1 B LYS 2 n 2 LYS 2 B MET 3 n 3 MET 3 B SER 4 n 4 SER 4 B THR 5 n 5 THR 5 B ALA 6 n 6 ALA 6 B ILE 7 n 7 ILE 7 B SER 8 n 8 SER 8 B VAL 9 n 9 VAL 9 B LEU 10 n 10 LEU 10 B LEU 11 n 11 LEU 11 B ALA 12 n 12 ALA 12 B GLN 13 n 13 GLN 13 B ALA 14 n 14 ALA 14 B VAL 15 n 15 VAL 15 B PHE 16 n 16 PHE 16 B LEU 17 n 17 LEU 17 B LEU 18 n 18 LEU 18 B LEU 19 n 19 LEU 19 B THR 20 n 20 THR 20 B SER 21 n 21 SER 21 B GLN 22 n 22 GLN 22 B ARG 23 n 23 ARG 23 B GLU 1 n 1 GLU 1 C LYS 2 n 2 LYS 2 C MET 3 n 3 MET 3 C SER 4 n 4 SER 4 C THR 5 n 5 THR 5 C ALA 6 n 6 ALA 6 C ILE 7 n 7 ILE 7 C SER 8 n 8 SER 8 C VAL 9 n 9 VAL 9 C LEU 10 n 10 LEU 10 C LEU 11 n 11 LEU 11 C ALA 12 n 12 ALA 12 C GLN 13 n 13 GLN 13 C ALA 14 n 14 ALA 14 C VAL 15 n 15 VAL 15 C PHE 16 n 16 PHE 16 C LEU 17 n 17 LEU 17 C LEU 18 n 18 LEU 18 C LEU 19 n 19 LEU 19 C THR 20 n 20 THR 20 C SER 21 n 21 SER 21 C GLN 22 n 22 GLN 22 C ARG 23 n 23 ARG 23 C GLU 1 n 1 GLU 1 D LYS 2 n 2 LYS 2 D MET 3 n 3 MET 3 D SER 4 n 4 SER 4 D THR 5 n 5 THR 5 D ALA 6 n 6 ALA 6 D ILE 7 n 7 ILE 7 D SER 8 n 8 SER 8 D VAL 9 n 9 VAL 9 D LEU 10 n 10 LEU 10 D LEU 11 n 11 LEU 11 D ALA 12 n 12 ALA 12 D GLN 13 n 13 GLN 13 D ALA 14 n 14 ALA 14 D VAL 15 n 15 VAL 15 D PHE 16 n 16 PHE 16 D LEU 17 n 17 LEU 17 D LEU 18 n 18 LEU 18 D LEU 19 n 19 LEU 19 D THR 20 n 20 THR 20 D SER 21 n 21 SER 21 D GLN 22 n 22 GLN 22 D ARG 23 n 23 ARG 23 D GLU 1 n 1 GLU 1 E LYS 2 n 2 LYS 2 E MET 3 n 3 MET 3 E SER 4 n 4 SER 4 E THR 5 n 5 THR 5 E ALA 6 n 6 ALA 6 E ILE 7 n 7 ILE 7 E SER 8 n 8 SER 8 E VAL 9 n 9 VAL 9 E LEU 10 n 10 LEU 10 E LEU 11 n 11 LEU 11 E ALA 12 n 12 ALA 12 E GLN 13 n 13 GLN 13 E ALA 14 n 14 ALA 14 E VAL 15 n 15 VAL 15 E PHE 16 n 16 PHE 16 E LEU 17 n 17 LEU 17 E LEU 18 n 18 LEU 18 E LEU 19 n 19 LEU 19 E THR 20 n 20 THR 20 E SER 21 n 21 SER 21 E GLN 22 n 22 GLN 22 E ARG 23 n 23 ARG 23 E author_defined_assembly 5 pentameric 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 3.82 0.50 120.30 124.12 A A A NE CZ NH1 ARG ARG ARG 23 23 23 N 1 3.84 0.50 120.30 124.14 B B B NE CZ NH1 ARG ARG ARG 23 23 23 N 1 3.81 0.50 120.30 124.11 C C C NE CZ NH1 ARG ARG ARG 23 23 23 N 1 3.80 0.50 120.30 124.10 D D D NE CZ NH1 ARG ARG ARG 23 23 23 N 1 3.80 0.50 120.30 124.10 E E E NE CZ NH1 ARG ARG ARG 23 23 23 N 1 E E C O ARG ARG 23 23 0.150 0.019 1.229 1.379 N THREE-DIMENSIONAL STRUCTURE OF THE PENTAMERIC HELICAL BUNDLE OF THE ACETYLCHOLINE RECEPTOR M2 TRANSMEMBRANE SEGMENT 1 N N 1 N N 1 N N 1 N N 1 N N 2 N N A GLU 1 A GLU 1 HELX_P A ARG 23 A ARG 23 1 1 23 B GLU 1 B GLU 1 HELX_P B ARG 23 B ARG 23 1 2 23 C GLU 1 C GLU 1 HELX_P C ARG 23 C ARG 23 1 3 23 D GLU 1 D GLU 1 HELX_P D ARG 23 D ARG 23 1 4 23 E GLU 1 E GLU 1 HELX_P E ARG 23 E ARG 23 1 5 23 covale 1.230 one E ARG 23 E C ARG 23 1_555 E OH 24 F O OH 1_555 SIGNALING PROTEIN NEUROTRANSMITTER RECEPTOR, M2, LIPID BILAYERS, ION-CHANNEL, HELICAL BUNDLE, PENTAMERIC BUNDLE, SIGNALING PROTEIN ACHD_TORCA UNP 1 P02718 276 298 1EQ8 1 23 P02718 A 1 1 23 276 298 1EQ8 1 23 P02718 B 1 1 23 276 298 1EQ8 1 23 P02718 C 1 1 23 276 298 1EQ8 1 23 P02718 D 1 1 23 276 298 1EQ8 1 23 P02718 E 1 1 23 BINDING SITE FOR RESIDUE OH E 24 E OH 24 Software 3 E LEU 19 E LEU 19 3 1_555 E THR 20 E THR 20 3 1_555 E ARG 23 E ARG 23 3 1_555 1 P 1