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Microarray Analysis for Saccharomyces cerevisiae

Microarray Analysis for Saccharomyces cerevisiae

Published on: April 7, 2011

Widespread cytoplasmic mRNA transport in yeast: identification of 22 bud-localized transcripts using DNA microarray

K A Shepard¹, A P Gerber, A Jambhekar

¹Department of Cellular and Molecular Pharmacology and Biochemistry and Biophysics and Howard Hughes Medical Institute, University of California, San Francisco, CA 94107, USA.

Proceedings of the National Academy of Sciences of the United States of America

|September 19, 2003

Summary

Researchers discovered that messenger RNA (mRNA) transport is widely used in budding yeast to generate cell asymmetry. This process localizes various proteins, including those involved in stress responses, to specific cellular regions.

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Area of Science:

Cell Biology
Molecular Biology
Genetics

Background:

Cytoplasmic mRNA localization is crucial for generating cell asymmetry and segregating protein activity.
Previous research identified two specific mRNAs localized to bud tips in Saccharomyces cerevisiae.
Understanding mRNA localization mechanisms is key to deciphering cellular organization and function.

Purpose of the Study:

To identify additional mRNAs localized to bud tips in yeast.
To investigate the role of RNA transport components in mRNA localization.
To explore the mechanisms underlying asymmetric protein localization in yeast.

Main Methods:

Immunoprecipitation of RNA transport components (She2p, She3p, Myo4p).
DNA microarray analysis to identify associated RNAs.
Green fluorescent protein (GFP)-tagged RNA reporter assay for secondary screening.

Main Results:

Identification of 22 additional mRNAs localized to bud tips.
These localized mRNAs encode diverse proteins, including those involved in stress responses and cell wall maintenance.
Asymmetric protein localization was observed even without RNA transport, suggesting redundant mechanisms.

Conclusions:

RNA transport plays a widespread and significant role in mRNA localization in budding yeast.
Untranslated regions of mRNA are not essential for localization in yeast, unlike in metazoans.
Budding yeast utilizes multiple mechanisms for achieving asymmetric protein localization.