Allele-specific suppression by formation of new protein-protein interactions in yeast.

Allele-specific suppression by formation of new protein-protein interactions in yeast.
复制标题

通过在酵母中形成新的蛋白质-蛋白质相互作用来进行等位基因特异性抑制。

DOI:
10.1093/genetics/147.4.1635
复制
发表时间:
1997
期刊:
影响因子:
3.3
通讯作者:
Adams,AE
Adams,AE
中科院分区:
生物学2区
文献类型:
--
作者:
Sandrock,TM;O'Dell,JL;Adams,AE

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酵母菌毛蛋白由 SAC6 基因编码,该基因的突变会抑制肌动蛋白基因 (ACT1) 中的温度敏感突变。为了研究抑制机制,我们对野生型和突变型肌动蛋白和 Sac6 蛋白的各种组合之间的相互作用进行了生化分析。之前,我们发现被 sac6 突变抑制的肌动蛋白突变编码的蛋白质与野生型 Sac6p 的亲和力降低。在本研究中,我们发现突变型 Sac6 蛋白与突变型肌动蛋白的结合比野生型 SacGp 更紧密,从而补偿了突变型肌动蛋白引起的相互作用减弱。值得注意的是,我们还发现突变型 Sac6 蛋白与野生型肌动蛋白的结合比野生型 Sac6p 更紧密。这一结果表明抑制并不是通过恢复原始接触位点而发生的,而是通过形成新的接触位点而发生的。这一发现反对通过“锁和钥匙”机制发生抑制,并提出了一种涉及两种蛋白质之间亲和力更全面增加的机制。我们认为,涉及相互作用蛋白质的最常见的抑制因子可能会通过这种不太具体的机制发生。
Yeast fimbrin is encoded by theSAC6gene, mutations of which suppress temperature-sensitive mutations in the actin gene (ACT1). To examine the mechanism of suppression, we have conducted a biochemical analysis of the interaction between various combinations of wild-type and mutant actin and Sac6 proteins. Previously, we showed that actin mutations that are suppressed bysac6mutations encode proteins with a reduced affinity for wild-type Sac6p. In the present study, we have found that mutant Sac6 proteins bind more tightly to mutant actin than does wild-type SacGp, and thus compensate for weakened interactions caused by the mutant actin. Remarkably, we have also found that mutant Sac6 proteins bind more tightly to wild-type actin than does wild-type Sac6p. This result indicates that suppression does not occur through the restoration of the original contact site, but rather through the formation of a novel contact site. This finding argues against suppression occurring through a “lock-and-key” mechanism and suggests a mechanism involving more global increases in affinity between the two proteins. We propose that the most common kind of suppressors involving interacting proteins will likely occur through this less specific mechanism.
酵母肌动蛋白突变的显性抑制因子相互抑制。
DOI: 10.1093/genetics/121.4.675
发表时间: 1989
期刊: Genetics
影响因子: 3.3
作者:
Adams,AE;Botstein,D
通讯作者: Botstein,D
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发表时间: 1993
影响因子: 5.5
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通讯作者: Kazuo Suzuki
DOI: 10.1016/s0006-3495(93)81059-2
发表时间: 1993-07-01
影响因子: 3.4
作者:
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通讯作者: POLLARD, TD
DOI: 10.1093/genetics/140.1.91
发表时间: 1995-05
期刊: Genetics
影响因子: 3.3
作者:
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通讯作者: S. Brower;J. Honts;A. Adams
酵母菌丝蛋白和肌动蛋白之间相互作用的体外分析:等位基因特异性抑制机制的模型
DOI: --
发表时间: 1996
期刊:
影响因子: --
作者:
T. Sandrock
通讯作者: T. Sandrock