We report the genetic and biochemical properties of a staurosporine (ST)- and temperature-sensitive mutant, stt10, of Saccharomyces cerevisiae. The stt10 mutant shows an osmoremedial phenotype in a medium with 1 M sorbitol. ST sensitivity of the stt10 mutant was suppressed by overexpression of PKC1/STT1, showing the genetic interactions of STT10 with the PKC1/STT1 pathway. The nucleotide sequence of STT10 predicts a hydrophilic protein composed of 577 amino acids that possesses 20-25% sequence similarity with yeast Slp1/Vam5p, Sec1p and Sly1p, and nematode Unc-18. The stt10 deletion mutant is viable and shows a typical class-D vacuolar protein sorting defective (vps) phenotype. Vacuoles from stt10 cells have a normal vacuolar H(+)-ATPase activity, but are defective in vacuolar acidification. Genetic studies of yeast mutants carrying delta stt10, delta bck1, stt1/pkc1 or stt4 have revealed that their functions are phenotypically related to maintenance of cellular osmotic integrity.
| Predicate | Object |
|---|---|
| rdf:type | |
| rdfs:comment |
We report the genetic and biochemical properties of a staurosporine (ST)- and temperature-sensitive mutant, stt10, of Saccharomyces cerevisiae. The stt10 mutant shows an osmoremedial phenotype in a medium with 1 M sorbitol. ST sensitivity of the stt10 mutant was suppressed by overexpression of PKC1/STT1, showing the genetic interactions of STT10 with the PKC1/STT1 pathway. The nucleotide sequence of STT10 predicts a hydrophilic protein composed of 577 amino acids that possesses 20-25% sequence similarity with yeast Slp1/Vam5p, Sec1p and Sly1p, and nematode Unc-18. The stt10 deletion mutant is viable and shows a typical class-D vacuolar protein sorting defective (vps) phenotype. Vacuoles from stt10 cells have a normal vacuolar H(+)-ATPase activity, but are defective in vacuolar acidification. Genetic studies of yeast mutants carrying delta stt10, delta bck1, stt1/pkc1 or stt4 have revealed that their functions are phenotypically related to maintenance of cellular osmotic integrity.
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| skos:exactMatch | |
| uniprot:name |
Gene
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| uniprot:author |
Anraku Y.,
Hirose R.,
Nakano A.,
Ohya Y.,
Yoshida S.
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| uniprot:date |
1995
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| uniprot:pages |
117-122
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| uniprot:title |
STT10, a novel class-D VPS yeast gene required for osmotic integrity related to the PKC1/STT1 protein kinase pathway.
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| uniprot:volume |
160
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| dc-term:identifier |
doi:10.1016/0378-1119(95)00214-Q
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