Suppr超能文献

酿酒酵母色氨酸合成酶突变体中等位基因互补的两种机制。

Two mechanisms of allelic complementation among tryptophan synthetase mutants of Saccharomyces cerevisiae.

作者信息

Duntze W, Manney T R

出版信息

J Bacteriol. 1968 Dec;96(6):2085-93. doi: 10.1128/jb.96.6.2085-2093.1968.

Abstract

Two different types of allelic complementation were observed in tryptophan synthetase mutants of the yeast Saccharomyces cerevisiae. Each type is associated with a different mechanism for the enzymatic conversion of indole-3-glycerol phosphate (InGP) to tryptophan. Mechanism I is utilized by a hybrid tryptophan synthetase that resembles, but is not identical with, the wild-type enzyme. Mechanism II is due to a sequential conversion of InGP to free indole, and indole to tryptophan. Two partially active mutant enzymes rather than a single hybrid enzyme catalyze the sequential reaction steps. This is an example of intracellular cross-feeding. The quantitative evaluation of mechanism II leads to the conclusion that tryptophan synthetase in yeast is most likely a dimer of two identical subunits.

摘要

在酿酒酵母色氨酸合成酶突变体中观察到两种不同类型的等位基因互补。每种类型都与吲哚 - 3 - 甘油磷酸(InGP)酶促转化为色氨酸的不同机制相关。机制I由一种杂合色氨酸合成酶利用,该酶与野生型酶相似但不相同。机制II是由于InGP顺序转化为游离吲哚,然后吲哚再转化为色氨酸。两个部分活性的突变酶而非单个杂合酶催化这一系列反应步骤。这是细胞内交叉喂养的一个例子。对机制II的定量评估得出结论,酵母中的色氨酸合成酶很可能是由两个相同亚基组成的二聚体。

相似文献

4
Tryptophan synthetase in Euglena gracilis strain G.纤细裸藻G株中的色氨酸合成酶
J Bacteriol. 1972 Jun;110(3):1100-6. doi: 10.1128/jb.110.3.1100-1106.1972.
10
Isolation of Saccharomyces cerevisiae TRP3.酿酒酵母TRP3的分离
J Bacteriol. 1983 Jan;153(1):345-9. doi: 10.1128/jb.153.1.345-349.1983.

引用本文的文献

本文引用的文献

5
Studies on the mechanism of the tryptophan synthetase reaction.色氨酸合成酶反应机制的研究。
Biochim Biophys Acta. 1962 Aug 13;62:279-93. doi: 10.1016/0006-3002(62)90041-0.
7
The tryptophan synthetase system.色氨酸合成酶系统。
Bacteriol Rev. 1960 Jun;24(2):221-45. doi: 10.1128/br.24.2.221-245.1960.

文献检索

告别复杂PubMed语法,用中文像聊天一样搜索,搜遍4000万医学文献。AI智能推荐,让科研检索更轻松。

立即免费搜索

文件翻译

保留排版,准确专业,支持PDF/Word/PPT等文件格式,支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述,25分钟生成高质量综述,智能提取关键信息,辅助科研写作。

立即免费体验