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Distribution of Sec24 isoforms to each ER exit site is dynamically regulated in Saccharomyces cerevisiae
Author(s) -
Iwasaki Hirohiko,
Yorimitsu Tomohiro,
Sato Ken
Publication year - 2015
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2015.04.006
Subject(s) - saccharomyces cerevisiae , budding yeast , gene isoform , microbiology and biotechnology , cell , copii , chemistry , yeast , biology , biochemistry , endoplasmic reticulum , gene , secretory pathway , golgi apparatus
COPII vesicles are formed at specific subdomains of the ER, termed ER exit sites (ERESs). Depending on the cell type, ERESs number from a few to several hundred per cell. However, whether these ERESs are functionally and compositionally identical at the cellular level remains unclear. Our live cell‐imaging analysis in Saccharomyces cerevisiae revealed that the isoforms of cargo‐adaptor subunits are unequally distributed to each ERES at steady state, whereas this distribution is altered in response to UPR activation. These results suggest that in S. cerevisiae cargo loading to ERES is dynamically controlled in response to environmental changes.