RGD Reference Report - A mammalian homolog of SEC61p and SECYp is associated with ribosomes and nascent polypeptides during translocation. - Rat Genome Database

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A mammalian homolog of SEC61p and SECYp is associated with ribosomes and nascent polypeptides during translocation.

Authors: Gorlich, D  Prehn, S  Hartmann, E  Kalies, KU  Rapoport, TA 
Citation: Gorlich D, etal., Cell 1992 Oct 30;71(3):489-503.
RGD ID: 68306
Pubmed: PMID:1423609   (View Abstract at PubMed)

SEC61p is essential for protein translocation across the endoplasmic reticulum membrane of S. cerevisiae. We have found a mammalian homolog that shows more than 50% sequence identity with the yeast protein. Moreover, several regions of SEC61p have significant similarities with corresponding ones of SecYp of bacteria, indicating a strong evolutionary conservation of the mechanism of protein translocation. Mammalian Sec61p, like the yeast protein, is located in the immediate vicinity of nascent polypeptides during their membrane passage. It is tightly associated with membrane-bound ribosomes, suggesting that the nascent chain passes directly from the ribosome into a protein-conducting channel. These results define Sec61p as a ubiquitous key component of the protein translocation apparatus.

Objects referenced in this article
Gene Sec61a1 SEC61 translocon subunit alpha 1 Rattus norvegicus

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