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The Protein-Conducting Channel in the Membrane of the Endoplasmic Reticulum Is Open Laterally toward the Lipid Bilayer

Martoglio, Bruno ; Hofmann, Michael W. ; Brunner, Josef ; Dobberstein, Bernhard

In: Cell, 81 (1995), pp. 207-214

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Lipids and proteins were found to contact a nascent type II membrane protein, as well as a nascent secretory protein, during their insertion into the membrane of the endoplasmic reticulum. This suggests that the protein-conducting channel is open laterally toward the lipid bilayer during an early stage of protein insertion. Contact to lipids was confined to the hydrophobic core region of the respective signal or signal anchor sequence. Thus, the nascent polypeptide is positioned in the translocation complex such that the signal or signal anchor sequence faces the lipid bilayer, whereas the hydrophilic, translocating portion is in proteinaceous environment.

Item Type: Article
Journal or Publication Title: Cell
Volume: 81
Date Deposited: 30 Apr 2008 17:28
Date: 1995
Page Range: pp. 207-214
Faculties / Institutes: Service facilities > Center for Molecular Biology Heidelberg
Subjects: 570 Life sciences
Schriftenreihe ID: Works by Bernhard Dobberstein
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