期刊
NATURE CELL BIOLOGY
卷 3, 期 10, 页码 891-896出版社
MACMILLAN PUBLISHERS LTD
DOI: 10.1038/ncb1001-891
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Chaperone proteins are thought to promote the correct folding and assembly of newly synthesized proteins and to facilitate restoration of the folded state under environmental conditions that favour protein denaturation. They are among the most ubiquitous and highly conserved of all proteins. The eukaryotic endoplasmic reticulum (ER) chaperone gp96 in particular has long been thought to be indispensable for cell survival. Here we report that a screen for genes required for the immune response to bacterial endotoxins has identified a B-cell line deficient in gp96. Absence of gp96 is compatible with cellular survival even under stress conditions and causes a defect in the formation of only a small subset of cell surface receptors. Toll-like receptors are retained intracellularly in the absence of gp96, explaining the unresponsiveness of the mutant to microbial stimuli.
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