Send to:

Choose Destination
See comment in PubMed Commons below
Mol Genet Genomics. 2004 Jun;271(5):603-15. Epub 2004 May 6.

Genetic interactions between an RNA polymerase II phosphatase and centromeric elements in Saccharomyces cerevisiae.

Author information

  • 1Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720-3202, USA.


The Saccharomyces cerevisiase protein phosphatase Fcp1 has been implicated in the regulation of transcription by RNA polymerase II, and is encoded by the essential gene FCP1. A screen was carried out for multicopy suppressors of the temperature-sensitive phenotype of two phosphatase mutants, fcp1-2 and fcp1-4. Only the wild-type FCP1 was found to suppress (complement) the fcp1-4 mutation. For fcp1-2 three second-site suppressors were identified. One contained the ORF for ZDS1. The remaining two suppressors mapped to the centromere regions of chromosomes I and V. Suppression due to centromere DNA was found to be more dependent on the CDEIII region than on other regions of the centromere. The presence of a suppressor centromere affected the level of Fcp1 protein and the overall phosphorylation state of RNA polymerase II (RNAPII) in fcp1-2 cells, but not wild-type cells, grown at both permissive and non-permissive temperatures. In addition, genetic interactions were identified between this FCP1 mutant and the genes SKP1, CEP3 and CBF1, which code for centromere binding proteins. The mechanism of suppression and regulation of Fcp1-2 protein activity by centromeric DNA is discussed.

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Springer
    Loading ...
    Write to the Help Desk