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A Subcellular Localization Survey for All SNARE Proteins in Saccharomyces cerevisiae |
ZHANG Zheng-tan,ZHU Jing,XIE Zhi-ping() |
State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology,Shanghai Jiao Tong University, Shanghai 200240, China |
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Abstract In eukaryotic cells, protein transport between membrane structures such as endoplasmic reticulum, Golgi, and plasma membrane is mainly achieved via vesicle budding and fusion. The SNARE protein family plays a key role in mediating the fusion of vesicles with the target membrane structure. In the model organism Saccharomyces cerevisiae, systematic studies of SNARE proteins in the whole genome are still lacking. A set of plasmids for the labeling of all 24 SNAREs in S. cerevisiae with GFP are constructed. Most of the plasmids employ endogenous promoters for expression, with only a few mildly overexpressed, thus avoiding potential mislocalization caused by high overexpression. The subcellular localization of each SNARE is verified by co-localization with organelle markers. Results indicate that the localization of three SNAREs differs from those in existing literature: Bos1 localizes to early Golgi; and Snc1 and Bet1 localize to the late Golgi/early endosomes. In addition, Sec9 is detected at the bud tip and septum. This is the first time that the localization of Sec9 in vegetative cells has been observed. It is also the first comprehensive experimental evaluation of yeast SNARE subcellular localization. Furthermore, the constructed plasmids constitute a convenient tool set for future yeast cell biology studies.
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Received: 28 March 2019
Published: 12 November 2019
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Corresponding Authors:
Zhi-ping XIE
E-mail: zxie@sjtu.edu.cn
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