Subcellular localization of the interaction of bipolar landmarks Bud8p and Bud9p with Rax2p in Saccharomyces cerevisiae diploid cells.

Abstract:

:In Saccharomyces cerevisiae, the bud site selection of diploid cells is regulated by at least four persistent landmarks, Bud8p, Bud9p, Rax1p, and Rax2p. Bud8p and Bud9p are essential for the establishment of bipolar budding and localize mainly to the distal and the proximal poles, respectively. Their subcellular localizations are regulated through interaction with Rax1p/Rax2p. We investigated when and where Bud8p and Bud9p physically interact with Rax2p in vivo using a split-GFP method. GFP fluorescence showed that Bud8p physically interacted with Rax2p at the proximal or distal pole in unbudded cells; a physical interaction was also observed at the opposite pole to the growing bud in mother cells with a large-size bud. Bud9p physically interacted with Rax2p at the birth scar in budded mother cells. These observations suggest that the interaction of Rax2p with Bud8p and Bud9p may contribute to the translocation of bipolar landmarks to the correct sites.

authors

Kato Y,Kawasaki H,Arakawa N,Hirano H

doi

10.1016/j.bbrc.2010.07.102

subject

Has Abstract

pub_date

2010-09-03 00:00:00

pages

525-30

issue

4

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(10)01422-1

journal_volume

399

pub_type

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