Structural highlights
Function
SC61G_HUMAN Component of SEC61 channel-forming translocon complex that mediates transport of signal peptide-containing precursor polypeptides across the endoplasmic reticulum (ER) (By similarity). Forms a ribosome receptor and a gated pore in the ER membrane, both functions required for cotranslational translocation of nascent polypeptides (By similarity). The SEC61 channel is also involved in ER membrane insertion of transmembrane proteins: it mediates membrane insertion of the first few transmembrane segments of proteins, while insertion of subsequent transmembrane regions of multi-pass membrane proteins is mediated by the multi-pass translocon (MPT) complex (PubMed:32820719, PubMed:36261522). The SEC61 channel cooperates with the translocating protein TRAM1 to import nascent proteins into the ER (By similarity).[UniProtKB:P60058][UniProtKB:P61619][1] [2]
References
- ↑ McGilvray PT, Anghel SA, Sundaram A, Zhong F, Trnka MJ, Fuller JR, Hu H, Burlingame AL, Keenan RJ. An ER translocon for multi-pass membrane protein biogenesis. Elife. 2020 Aug 21;9:e56889. PMID:32820719 doi:10.7554/eLife.56889
- ↑ Sundaram A, Yamsek M, Zhong F, Hooda Y, Hegde RS, Keenan RJ. Substrate-driven assembly of a translocon for multipass membrane proteins. Nature. 2022 Nov;611(7934):167-172. PMID:36261522 doi:10.1038/s41586-022-05330-8