Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Genetics. 2009 Sep;183(1):185-94. doi: 10.1534/genetics.109.105155. Epub 2009 Jun 29.

Alternative splicing of PTC7 in Saccharomyces cerevisiae determines protein localization.

Author information

  • 1Stanford Genome Technology Center, Department of Biochemistry, Stanford University School of Medicine, 855 California Ave., Palo Alto, California 94304, USA. kjuneau@stanford.edu

Abstract

It is well established that higher eukaryotes use alternative splicing to increase proteome complexity. In contrast, Saccharomyces cerevisiae, a single-cell eukaryote, conducts predominantly regulated splicing through retention of nonfunctional introns. In this article we describe our discovery of a functional intron in the PTC7 (YHR076W) gene that can be alternatively spliced to create two mRNAs that code for distinct proteins. These two proteins localize to different cellular compartments and have distinct cellular roles. The protein translated from the spliced mRNA localizes to the mitochondria and its expression is carbon-source dependent. In comparison, the protein translated from the unspliced mRNA contains a transmembrane domain, localizes to the nuclear envelope, and mediates the toxic effects of Latrunculin A exposure. In conclusion, we identified a definitive example of functional alternative splicing in S. cerevisiae that confers a measurable fitness benefit.

PMID:
19564484
[PubMed - indexed for MEDLINE]
PMCID:
PMC2746143
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Write to the Help Desk