Open AccessBinding of Sly1 to Sed5 enhances formation of the yeast early Golgi SNARE complex
Author(s) -
Yoichi Kosodo,
Yoichi Noda,
Hiroyuki Adachi,
Koji Yoda
Publication year - 2002
Publication title -
journal of cell science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.384
H-Index - 278
eISSN - 1477-9137
pISSN - 0021-9533
DOI - 10.1242/jcs.00027
Subject(s) - vesicular transport proteins , golgi apparatus , biology , vesicular transport protein , saccharomyces cerevisiae , yeast , biochemistry , microbiology and biotechnology , chemistry , membrane , vesicle , endoplasmic reticulum , vacuolar protein sorting
SLY1 is an essential gene for vesicular transport between the ER and the early Golgi apparatus in Saccharomyces cerevisiae. It encodes a hydrophilic Sec1/Munc18 family protein that binds to the t-SNAREs. The amount of Sly1 protein that coprecipitated with the t-SNARE Sed5 was much reduced in a temperature-sensitive sly1ts mutant yeast compared with the wildtype. The mutant Sly1ts protein was shown to have a reduced binding activity to Sed5. In the wildtype, a detectable amount of Sly1 was found in the complex between Sed5 and the v-SNARE Bet1. In vitro formation of this complex on different membranes in yeast lysate was enhanced by the addition of recombinant Sly1. These results indicate that binding of Sly1 to Sed5 enhances trans-SNARE complex formation.