volume 5, issue 10, Pe13323 2010
DOI: 10.1371/journal.pone.0013323
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Abstract: BackgroundThe Saccharomyces cerevisiae syntaxin1 homologues Sso1p and Sso2p perform an essential function in membrane fusion in exocytosis. While deletion of either SSO1 or SSO2 causes no obvious phenotype in vegetatively grown cells, deletion of both genes is lethal. In sporulating diploid S. cerevisiae cells only Sso1p, but not Sso2p, is needed for membrane fusion during prospore membrane formation. Mass spectrometry and in vivo labeling data suggest that serines 23, 24, and 79 in Sso1p and serines 31 and 34…

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