Mutations that enhance the cap2 null mutant phenotype in Saccharomyces cerevisiae affect the actin cytoskeleton, morphogenesis and pattern of growth.

Mutations that enhance the cap2 null mutant phenotype in Saccharomyces cerevisiae affect the actin cytoskeleton, morphogenesis and pattern of growth.
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增强酿酒酵母中 cap2 无效突变体表型的突变会影响肌动蛋白细胞骨架、形态发生和生长模式。

DOI:
10.1093/genetics/135.3.693
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发表时间:
1993
期刊:
影响因子:
3.3
通讯作者:
Cooper,JA
Cooper,JA
中科院分区:
生物学2区
文献类型:
--
作者:
Karpova,TS;Lepetit,MM;Cooper,JA

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在菌落颜色测定中获得赋予合成致死性的突变与CAP 2(编码酿酒酵母的加帽蛋白的β亚基的基因)中的无效突变的组合。单基因遗传被发现的4个突变,这归因于3个遗传位点。其中一个突变sac 6 -69位于编码fimbinding的基因中,fimbinding是另一种肌动蛋白结合蛋白,这是预期的,因为已知SAC 6和CAP 2中的无效突变是合成致死的。另外两个基因座被指定为与cap 2合成致死的slc。这些基因座包括突变slc 1 -66、slc 1 -87和slc 2 -107。slc突变是半显性的,如slc/SLC cap 2/cap 2杂合子中的不完全互补所示。slc突变和sac 6 -69相互作用,如双杂合子中增强的表型所示。此外,单倍体slc 2 -107 sac 6 -69双突变体不能存活。在CAP 2背景下,slc突变导致温度和渗透敏感性。它们改变肌动蛋白细胞骨架的分布,包括肌动蛋白电缆存在的缺陷和皮层肌动蛋白斑块的极化。slc突变也导致假菌丝生长模式。总之,这些结果表明,slc 1和slc 2编码的肌动蛋白细胞骨架在酵母和肌动蛋白细胞骨架可以调节生长模式的组件。
Mutations conferring synthetic lethality in combination with null mutations in CAP2, the gene encoding the beta subunit of capping protein of Saccharomyces cerevisiae, were obtained in a colony color assay. Monogenic inheritance was found for four mutations, which were attributed to three genetic loci. One mutation, sac6-69, is in the gene encoding fimbrin, another actin-binding protein, which was expected because null mutations in SAC6 and CAP2 are known to be synthetic-lethal. The other two loci were designated slc for synthetic lethality with cap2. These loci include the mutations slc1-66, slc1-87 and slc2-107. The slc mutations are semi-dominant, as shown by incomplete complementation in slc/SLC cap2/cap2 heterozygotes. The slc mutations and sac6-69 interact with each other, as shown by enhanced phenotypes in diheterozygotes. Moreover, the haploid slc2-107 sac6-69 double mutant is inviable. In a CAP2 background, the slc mutations lead to temperature and osmotic sensitivity. They alter the distribution of the actin cytoskeleton, including deficits in the presence of actin cables and the polarization of cortical actin patches. The slc mutations also lead to a pseudomycelial growth pattern. Together these results suggest that slc1 and slc2 encode components of the actin cytoskeleton in yeast and that the actin cytoskeleton can regulate the patterns of growth.
通过整合 DNA 转化对酵母肌动蛋白基因进行致命破坏。
DOI: 10.1126/science.7046050
发表时间: 1982
期刊: Science (New York, N.Y.)
影响因子: --
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影响因子: 11.1
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发表时间: 1988-06
期刊: Genetics
影响因子: 3.3
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发表时间: 1992-07
期刊: The Journal of Cell Biology
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