IRA1, an inhibitory regulator of the RAS-cyclic AMP pathway in Saccharomyces cerevisiae

IRA1, an inhibitory regulator of the RAS-cyclic AMP pathway in Saccharomyces cerevisiae
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IRA1,酿酒酵母 RAS-环 AMP 通路的抑制性调节因子

DOI:
10.1128/mcb.9.2.757-768.1989
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发表时间:
1989
影响因子:
5.3
通讯作者:
A. Toh
A. Toh
中科院分区:
生物学2区
文献类型:
--
作者:
Kazuma Tanaka;K. Matsumoto;A. Toh

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基因IRA 1(以前称为PPD 1)中的突变最初被表征为磷蛋白磷酸酶的缺乏。IRA 1基因已被克隆和测序。结果表明,该基因有一个大的开放阅读框架(8,817 bp),可编码2,938个氨基酸,北方(RNA)印迹分析发现了约10个碱基的信使序列,核酸酶S1保护证实了起始密码子ATG上游97和98 bp处的mRNA起始点。IRA 1基因的破坏导致对氮饥饿和热休克的敏感性。二倍体IRA 1基因纯合的破坏是缺乏孢子形成。IRA 1基因的破坏抑制了cdc 25突变的致死性,但没有抑制ras 1 ras 2或ras 1突变的致死性。在IRA 1基因的破坏突变体中,磷蛋白磷酸酶的缺乏是不可再现的。此外,ira 1突变体表现出增加的环AMP水平。我们的研究结果表明,IRA 1蛋白抑制RAS蛋白的功能,在一种拮抗的方式在RAS-环AMP途径中的CDC 25蛋白的功能在酿酒酵母。
A mutation in the gene IRA1 (formerly called PPD1) was originally characterized as a deficiency of a phosphoprotein phosphatase. The IRA1 gene has been cloned and sequenced. A large open reading frame (8,817 base pairs) which can encode a protein of 2,938 amino acids was found. Northern (RNA) blot analysis detected a message of about 10 kilobases, and nuclease S1 protection demonstrated mRNA start points at 97 and 98 base pairs upstream from the putative initiator ATG codon. Disruption of the IRA1 gene resulted in sensitivity to nitrogen starvation and heat shock. Diploids homozygous for the disrupted IRA1 gene were deficient in sporulation. Disruption of the IRA1 gene suppressed the lethality of the cdc25 mutation but did not suppress the lethality of either the ras1 ras2 or the cyr1 mutations. Deficiency of the phosphoprotein phosphatase was not reproducible in the disruption mutant of the IRA1 gene. Moreover, the ira1 mutant showed an increased level of cyclic AMP. Our results suggest that the IRA1 protein inhibits the function of the RAS proteins in a fashion antagonistic to the function of the CDC25 protein in the RAS-cyclic AMP pathway in Saccharomyces cerevisiae.
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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发表时间: 1982
影响因子: 11.1
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DOI: 10.1073/pnas.80.10.3035
发表时间: 1983-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
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