Abstract：
:The Saccharomyces cerevisiae PHO85 gene encodes a nonessential cyclin-dependent kinase that associates with 10 cyclin subunits. To survey the functions provided by Pho85, we identified mutants that require PHO85 for viability. We identified mutations that define seven Pho Eighty-Five Requiring or Efr loci, six of which are previously identified genes-BEM2 (YER155C), SPT7 (YBR081C), GCR1 (YPL075W), SRB5 (YGR104C), HFI1 (YPL254W), and BCK1 (YJL095W)-with one novel gene (YMR212C). We found that mutations in the EFR genes involved in morphogenesis are specifically inviable when the Pho85-associated G1 cyclins encoded by PCL1 and PCL2 are absent. pcl1 Delta bem2, pcl1 Delta pcl2 Delta cla4 Delta, and pcl1 Delta pcl2 Delta cdc42-1 strains are inviable. pcl1 Delta pcl2 Delta mpk1 Delta, pcl1 Delta pcl2 Delta bck1, and pcl1 Delta pcl2 Delta cln1 Delta cln2 Delta strains are also inviable, but are rescued by osmotic stabilization with 1 m sorbitol. We propose that the G1 cyclins encoded by PCL1 and PCL2 positively regulate CDC42 or another morphogenesis promoting function.
journal_name
Geneticsjournal_title
Geneticsauthors
Lenburg ME,O'Shea EKkeywords:
subject
Has Abstractpub_date
2001-01-01 00:00:00pages
39-51issue
1eissn
0016-6731issn
1943-2631journal_volume
157pub_type
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