MolNFT v1 · #187606 · protein

Cryo-EM structure of torpedo acetylcholine receptor in complex with carbachol, desensitized state

7SMR · Acetylcholine receptor subunit alpha: “Cryo-EM structure of torpedo acetylcholine receptor in complex with carbachol, desensitized state”. Electron microscopy, 6 ligands (POV, CLR, CCE), 20 pockets (best druggability 0.84). MolNFT…

PDB: 7SMR
Type: protein
Length: 2,022 residues
Chains: 5
Method: electron microscopy
Collection: MolNFT v1 / PDB
Contract: 0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner: 0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule: Acetylcholine receptor subunit alpha; Acetylcholine receptor subunit delta; Acetylcholine…
UniProt: P02710, P02718, P02712, P02714
Ligands: POV, CLR, CCE, NAG, MAN, BMA
Pockets: 20 · best druggability 0.84

Structure

electron microscopy · 5 distinct chains · 40% helix, 24% strand (DSSP).

Chain	Molecule	Type	Residues	Secondary structure	UniProt
A	Acetylcholine receptor subunit alpha	protein	387	41% helix, 25% strand	P02710
B	Acetylcholine receptor subunit delta	protein	425	39% helix, 23% strand	P02718
C	Acetylcholine receptor subunit beta	protein	406	40% helix, 27% strand	P02712
D	Acetylcholine receptor subunit alpha	protein	395	43% helix, 24% strand	P02710
E	Acetylcholine receptor subunit gamma	protein	409	38% helix, 24% strand	P02714

Ligands and binding sites

POV · (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate · ligand · 6 copies · chains A, E, B, C, D
CLR · Cholesterol · ligand · 3 copies · chains A, C, D
CCE · 2-[(aminocarbonyl)oxy]-N,N,N-trimethylethanaminium · ligand · 2 copies · chains A, B, D, E
NAG · 2-acetamido-2-deoxy-beta-D-glucopyranose · sugar · 12 copies · chains A, B, C, D, E
MAN · alpha-D-mannopyranose · sugar · 6 copies · chains A, D, E
BMA · beta-D-mannopyranose · sugar · 4 copies · chains A, C, D
DD9 · nonane · additive · chains A, B, C, D

Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.

Pockets

20 pockets found on a 1 Å grid, 20 with a druggability of 0.5 or more.

Pocket	Volume (Å³)	Druggability	Buriedness	Lining residues	Inside
1	849	0.84	0.86	77	empty
2	760	0.74	0.79	59	DD9
3	55	0.71	0.97	15	CCE
4	614	0.68	0.77	59	empty
5	470	0.68	0.79	46	empty

Interfaces

5 interfaces between chains.

A–B · 3457 Å² buried · 29 hydrogen bonds · protein-protein
B–C · 3336 Å² buried · 21 hydrogen bonds · protein-protein
D–E · 3317 Å² buried · 28 hydrogen bonds · protein-protein
A–E · 3209 Å² buried · 23 hydrogen bonds · protein-protein
C–D · 3155 Å² buried · 26 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 7 disulfide, 7 glycan (disulfide, N-glycosylation).

Compared structures

7SMR · Cryo-EM structure of Torpedo acetylcholine receptor in complex with carbachol… · the same entry in another collection · chain E against E, TM-score 1.00
P02712 · AlphaFold monomer V2.0 prediction for acetylcholine receptor subunit beta (P02712) · a predicted model of the same protein · chain C against A, TM-score 0.99
P02714 · AlphaFold monomer V2.0 prediction for acetylcholine receptor subunit gamma (P02714) · a predicted model of the same protein · chain E against A, TM-score 0.99
P02718 · AlphaFold monomer V2.0 prediction for acetylcholine receptor subunit delta (P02718) · a predicted model of the same protein · chain B against A, TM-score 0.98
P02710 · AlphaFold monomer V2.0 prediction for acetylcholine receptor subunit alpha (P02710) · a predicted model of the same protein · chain D against A, TM-score 0.97

Analyse

Open in the research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides and crosslinks on the 3D structure
Every structure of UniProt P02710
Every structure of UniProt P02718
Every structure of UniProt P02712
Every structure of UniProt P02714
Elsewhere: RCSB PDB 7SMR · PDBe 7SMR · UniProt P02710 · UniProt P02718 · UniProt P02712 · UniProt P02714

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