7RPM image
Deposition Date 2021-08-03
Release Date 2022-01-19
Last Version Date 2024-05-15
Entry Detail
PDB ID:
7RPM
Title:
Structures of the Intracellular Domain and Transmembrane Domain of the Human alpha7 Nicotinic Acetylcholine Receptors
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Conformers Calculated:
1000
Conformers Submitted:
15
Selection Criteria:
structures with the lowest energy
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Neuronal acetylcholine receptor subunit alpha-7
Gene (Uniprot):CHRNA7
Mutations:A263S, V268S, L270S, A474E
Chain IDs:A, B, C, D, E
Chain Length:272
Number of Molecules:5
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Structures of highly flexible intracellular domain of human alpha 7 nicotinic acetylcholine receptor.
Nat Commun 13 793 793 (2022)
PMID: 35145092 DOI: 10.1038/s41467-022-28400-x

Abstact

The intracellular domain (ICD) of Cys-loop receptors mediates diverse functions. To date, no structure of a full-length ICD is available due to challenges stemming from its dynamic nature. Here, combining nuclear magnetic resonance (NMR) and electron spin resonance experiments with Rosetta computations, we determine full-length ICD structures of the human α7 nicotinic acetylcholine receptor in a resting state. We show that ~57% of the ICD residues are in highly flexible regions, primarily in a large loop (loop L) with the most mobile segment spanning ~50 Å from the central channel axis. Loop L is anchored onto the MA helix and virtually forms two smaller loops, thereby increasing its stability. Previously known motifs for cytoplasmic binding, regulation, and signaling are found in both the helices and disordered flexible regions, supporting the essential role of the ICD conformational plasticity in orchestrating a broad range of biological processes.

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Primary Citation of related structures