| Literature DB >> 9050874 |
D L Wiest1, A Bhandoola, J Punt, G Kreibich, D McKean, A Singer.
Abstract
The folding and assembly of nascent proteins in the endoplasmic reticulum (ER) is assisted by molecular chaperones that are themselves retained within the ER. We now report that a number of different ER proteins, including molecular chaperones, are selectively expressed on the surface of immature thymocytes, but their surface expression is extinguished upon further differentiation. Escape from the ER is only possible for newly synthesized ER proteins before they become permanently retained. Thus, the cellular process of ER retention is incomplete in immature thymocytes and provides an explanation for surface expression of partial receptor complexes that transduce differentiative signals during thymic development.Mesh:
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Year: 1997 PMID: 9050874 PMCID: PMC20012 DOI: 10.1073/pnas.94.5.1884
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205