This entry includes small conductance mechanosensitive channels (MscS), which assembles to a homoheptameric complex [1-6]. Each monomer consists of a N-terminal transmembrane region and a large cytoplasmic segment composed of a five-stranded antiparallel beta-sheet domain (beta-domain, Pfam:PF00924) and a C-terminal alpha/beta-domain [1,2,3]. This is the C-terminal domain of McsS which, together with the middle beta-domain, creates a framework that connects to the cytoplasm through distinct openings [4-6].

1: Structural and functional differences between two homologous mechanosensitive channels of Methanococcus jannaschii. Kloda A, Martinac B; EMBO J 2001;20:1888-1896. PMID:11296222

2: Molecular identification of a mechanosensitive channel in archaea. Kloda A, Martinac B; Biophys J 2001;80:229-240. PMID:11159397

3: Mechanosensitive channels in prokaryotes. Martinac B; Cell Physiol Biochem 2001;11:61-76. PMID:11275684

4: Mechanosensitive channel gating by delipidation. Flegler VJ, Rasmussen A, Borbil K, Boten L, Chen HA, Deinlein H, Halang J, Hellmanzik K, Loffler J, Schmidt V, Makbul C, Kraft C, Hedrich R, Rasmussen T, Bottcher B; Proc Natl Acad Sci U S A. 2021; [Epub ahead of print] PMID:34376558

5: Open and shut: crystal structures of the dodecylmaltoside solubilized mechanosensitive channel of small conductance from Escherichia coli and Helicobacter pylori at 4.4 A and 4.1 A resolutions. Lai JY, Poon YS, Kaiser JT, Rees DC; Protein Sci. 2013;22:502-509. PMID:23339071

6: Structure and molecular mechanism of an anion-selective mechanosensitive channel of small conductance. Zhang X, Wang J, Feng Y, Ge J, Li W, Sun W, Iscla I, Yu J, Blount P, Li Y, Yang M; Proc Natl Acad Sci U S A. 2012;109:18180-18185. PMID:23074248