Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

HO encodes a site-specific endonuclease that initiates mating type switching in S. cerevisiae. It is expressed only transiently during the cell cycle of mother cells, as they undergo Start, but not in daughter cells. Since SWI5 appears to be the only HO transcription factor missing when daughter cells undergo Start, we were interested in the intracellular distribution of SWI5 at cell division. We discovered that SWI5 is found equally concentrated in the nuclei of both mother and daughter cells at the end of anaphase, suggesting that its subsequent fate must somehow differ. Prior to the end of anaphase, SWI5 accumulates in the cytoplasm and only moves into the nucleus when cells enter G1. A version of the HO promoter that has lost its dependence on Start is nevertheless still strongly cell cycle regulated and is activated when SWI5 moves into the nucleus.

Type

Journal article

Journal

Cell

Publication Date

24/08/1990

Volume

62

Pages

631 - 647

Keywords

Cell Compartmentation, Cell Cycle, Cell Nucleus, Endonucleases, Fluorescent Antibody Technique, Gene Expression Regulation, Fungal, Genes, Fungal, Promoter Regions, Genetic, Recombinant Proteins, Saccharomyces cerevisiae, Transcription Factors, Tubulin