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Schizosaccharomyces pombe Pep12p is required for vacuolar protein transport and vacuolar homotypic fusion

Paper ID Volume ID Publish Year Pages File Format Full-Text
21070 43205 2011 6 PDF Available
Title
Schizosaccharomyces pombe Pep12p is required for vacuolar protein transport and vacuolar homotypic fusion
Abstract

In eukaryotic cells, SNARE proteins are essential for intracellular vesicle trafficking. Several SNARE proteins are required for vacuolar protein transport and vacuolar biogenesis in Saccharomyces cerevisiae. Previously we demonstrated that one of the fission yeast SNARE proteins, Pep12p, is not required for vacuolar fusion process in Schizosaccharomyces pombe. We have re-examined the function of S. pombe Pep12p using the newly created pep12+ deletion strain. Deletion of the fission yeast pep12+ gene results in pleiotropic phenotypes consistent with the absence of normal vacuoles, including missorting of vacuolar carboxypeptidase Y-and various ion- and drug-sensitivities. GFP-Pep12 fusion protein is mostly localized at the vacuolar membrane and the prevacuolar compartment. The S. pombe pep12Δ mutation phenocopies that of vps33Δ, suggesting that both Pep12p and Vps33p act at the same membrane fusion step in S. pombe, and both mutations cause vacuolar deficiency.

Keywords
Schizosaccharomyces pombe; SNARE; Vacuolar protein sorting; Syntaxin; Membrane trafficking
First Page Preview
Schizosaccharomyces pombe Pep12p is required for vacuolar protein transport and vacuolar homotypic fusion
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 112, Issue 4, October 2011, Pages 309–314
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering