The Yak1 protein kinase of Saccharomyces cerevisiae moderates thermotolerance and inhibits growth by an Sch9 protein kinase-independent mechanism.

The Yak1 protein kinase of Saccharomyces cerevisiae moderates thermotolerance and inhibits growth by an Sch9 protein kinase-independent mechanism.
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酿酒酵母的 Yak1 蛋白激酶通过 Sch9 蛋白激酶独立机制调节耐热性并抑制生长。

DOI:
10.1093/genetics/136.2.465
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发表时间:
1994
期刊:
影响因子:
3.3
通讯作者:
Garrett,S
Garrett,S
中科院分区:
生物学2区
文献类型:
--
作者:
Hartley,AD;Ward,MP;Garrett,S

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另外两个激酶Sch9和Yak1的过表达或缺失可以缓解与酵母A激酶活性丧失相关的生长缺陷。利用上位性测试,我们已经证明了Sch9和Yak1定义了不同的信号通路,因此必须通过不同的机制抑制A激酶缺陷。尽管如此,Yak1激酶似乎调节着A激酶控制下的细胞过程。例如,耐热性的获得与Yak1激酶活性相关,因此YAK1过度表达的细胞比同基因Yak1菌株的抗性高200倍以上。这些结果首次将抑制A激酶生长缺陷以外的表型与Yak1活性的丧失联系在一起,并论证了Yak1激酶在细胞生长中的更广泛作用。
The growth defect associated with the loss of yeast A kinase activity can be alleviated by the overexpression or deletion of two other kinases, Sch9 and Yak1, respectively. Using tests of epistasis, we have shown that Sch9 and Yak1 define separate signaling pathways and must, therefore, suppress the A kinase defect by different mechanisms. Nevertheless, the Yak1 kinase appears to regulate cellular processes that are under A kinase control. For example, acquisition of heat resistance is correlated with Yak1 kinase activity, such that YAK1-overexpressing cells are over 200-fold more resistant than isogenic yak1 strains. These results, for the first time, associate a phenotype, other than suppression of the A kinase growth defect, with the loss of Yak1 activity and argue a broader role for the Yak1 kinase in cell growth.
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