Cellular mechanisms of membrane protein folding

William R. Skach

    Research output: Contribution to journalReview articlepeer-review

    88 Scopus citations

    Abstract

    The membrane protein-folding problem can be articulated by two central questions. How is protein topology established by selective peptide transport to opposite sides of the cellular membrane? And how are transmembrane segments inserted, integrated and folded within the lipid bilayer? In eukaryotes, this process usually takes place in the endoplasmic reticulum, coincident with protein synthesis, and is facilitated by the translating ribosome and the Sec61 translocon complex (RTC). At its core, the RTC forms a dynamic pathway through which the elongating nascent polypeptide moves as it is delivered into the cytosolic, lumenal and lipid compartments. This Perspective will focus on emerging evidence that the RTC functions as a protein-folding machine that restricts conformational space by establishing transmembrane topology and yet provides a permissive environment that enables nascent transmembrane domains to efficiently progress down their folding energy landscape.

    Original languageEnglish (US)
    Pages (from-to)606-612
    Number of pages7
    JournalNature Structural and Molecular Biology
    Volume16
    Issue number6
    DOIs
    StatePublished - Jun 2009

    ASJC Scopus subject areas

    • Structural Biology
    • Molecular Biology

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