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Annu Rev Genet. 2001;35:149-91.

The action of molecular chaperones in the early secretory pathway.

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Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.


The endoplasmic reticulum (ER) serves as a way-station during the biogenesis of nearly all secreted proteins, and associated with or housed within the ER are factors required to catalyze their import into the ER and facilitate their folding. To ensure that only properly folded proteins are secreted and to temper the effects of cellular stress, the ER can target aberrant proteins for degradation and/or adapt to the accumulation of misfolded proteins. Molecular chaperones play critical roles in each of these phenomena.

[Indexed for MEDLINE]

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