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EMBO Rep. 2019 Oct 4;20(10):e49034. doi: 10.15252/embr.201949034. Epub 2019 Sep 13.

A snapshot of membrane protein insertion.

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1
Nara Institute of Science and Technology, Ikoma, Nara, Japan.

Abstract

The cytoplasm is the main place for protein translation from where nascent proteins are transported to their working areas, including the inside, outside, and membrane of the cell. The majority of newly synthesized membrane proteins is co-translationally inserted into the membrane by the evolutionary conserved Sec translocon. In this issue of EMBO Reports, Kater et al [1] use single-particle cryo-electron microscopy to visualize a high-resolution structure of the E. coli SecYEG translocon:ribosome-nascent chain complex in a lipid environment constituted by nanodiscs. This snapshot represents an early intermediate state in membrane protein insertion and provides important information for understanding the molecular mechanism of membrane protein biogenesis.

PMID:
31518050
DOI:
10.15252/embr.201949034

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