Abstract
The localization of ASH1 mRNA to the distal tip of budding yeast cells is essential for the proper regulation of mating type switching in Saccharomyces cerevisiae. A localization element that is predominantly in the 3′-untranslated region (UTR) can direct this mRNA to the bud. Using this element in the three-hybrid in vivo RNA-binding assay, we identified a protein, Loc1p, that binds in vitro directly to the wild-type ASH1 3′-UTR RNA, but not to a mutant RNA incapable of localizing to the bud nor to several other mRNAs. LOC1 codes for a novel protein that recognizes double-stranded RNA structures and is required for efficient localization of ASH1 mRNA. Accordingly, Ash1p gets symmetrically distributed between daughter and mother cells in a loc1 strain. Surprisingly, Loc1p was found to be strictly nuclear, unlike other known RNA-binding proteins involved in mRNA localization which shuttle between the nucleus and the cytoplasm. We propose that efficient cytoplasmic ASH1 mRNA localization requires a previous interaction with specific nuclear factors.
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Dates
Type | When |
---|---|
Created | 23 years ago (July 26, 2002, 12:46 p.m.) |
Deposited | 2 years ago (July 28, 2023, 10:55 p.m.) |
Indexed | 9 months ago (Nov. 19, 2024, 10:42 a.m.) |
Issued | 24 years, 4 months ago (April 16, 2001) |
Published | 24 years, 4 months ago (April 16, 2001) |
Published Online | 24 years, 4 months ago (April 16, 2001) |
Published Print | 24 years, 4 months ago (April 16, 2001) |
@article{Long_2001, title={An Exclusively Nuclear RNA-Binding Protein Affects Asymmetric Localization of ASH1 mRNA and Ash1p in Yeast}, volume={153}, ISSN={1540-8140}, url={http://dx.doi.org/10.1083/jcb.153.2.307}, DOI={10.1083/jcb.153.2.307}, number={2}, journal={The Journal of Cell Biology}, publisher={Rockefeller University Press}, author={Long, Roy M. and Gu, Wei and Meng, Xiuhua and Gonsalvez, Graydon and Singer, Robert H. and Chartrand, Pascal}, year={2001}, month=apr, pages={307–318} }