Coordination between fission yeast glucan formation and growth requires a sphingolipase activity.

Coordination between fission yeast glucan formation and growth requires a sphingolipase activity.
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裂殖酵母葡聚糖形成和生长之间的协调需要鞘脂酶活性。

DOI:
10.1093/genetics/158.4.1397
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发表时间:
2001
期刊:
影响因子:
3.3
通讯作者:
Gould,KL
Gould,KL
中科院分区:
生物学2区
文献类型:
--
作者:
Feoktistova,A;Magnelli,P;Abeijon,C;Perez,P;Lester,RL;Dickson,RC;Gould,KL

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css1mutants display a novel defect inSchizosaccharomyces pombecell wall formation. The mutant cells are temperature-sensitive and accumulate large deposits of material that stain with calcofluor and aniline blue in their periplasmic space. Biochemical analyses of this material indicate that it consists of α- and β-glucans in the same ratio as found in cell walls of wild-typeS. pombe. Strikingly, the glucan deposits incss1mutant cells do not affect their overall morphology. The cells remain rod shaped, and the thickness of their walls is unaltered. Css1p is an essential protein related to mammalian neutral sphingomyelinase and is responsible for the inositolphosphosphingolipid-phospholipase C activity observed inS. pombemembranes. Furthermore, expression ofcss1+can compensate for loss ofISC1, the enzyme responsible for this activity inSaccharomyces cerevisiaemembranes. Css1p localizes to the entire plasma membrane and secretory pathway; a C-terminal fragment of Css1p, predicted to encode a single membrane-spanning segment, is sufficient to direct membrane localization of the heterologous protein, GFP. Our results predict the existence of an enzyme(s) or process(es) essential for the coordination ofS. pombecell wall formation and division that is, in turn, regulated by a sphingolipid metabolite.
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