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J Cell Biol. 1996 Jun;133(5):1017-26.

A new pathway for protein export in Saccharomyces cerevisiae.

Author information

  • 1Department of Biochemistry and Biophysics, University of California, San Francisco, 94143-0534, USA. cleves@cgl.ucsf.edu

Abstract

Several physiologically important proteins lack a classical secretory signal sequence, yet they are secreted from cells. To investigate the secretion mechanism of such proteins, a representative mammalian protein that is exported by a nonclassical mechanism, galectin-1, has been expressed in yeast. Galectin-1 is exported across the yeast plasma membrane, and this export does not require the classical secretory pathway nor the yeast multidrug resistance-like protein Ste6p, the transporter for the peptide a factor. A screen for components of the export machinery has identified genes that are involved in nonclassical export. These findings demonstrate a new pathway for protein export that is distinct from the classical secretory pathway in yeast.

PMID:
8655575
[PubMed - indexed for MEDLINE]
PMCID:
PMC2120850
Free PMC Article
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