Control of hemA Expression inRhodobacter sphaeroides 2.4.1: Effect of a Transposon Insertion in the hbdA Gene

Control of hemA Expression inRhodobacter sphaeroides 2.4.1: Effect of a Transposon Insertion in the hbdA Gene
复制标题

球形红细菌中 hemA 表达的控制 2.4.1:hbdA 基因中转座子插入的影响

DOI:
10.1128/jb.183.5.1568-1576.2001
复制
发表时间:
2001
影响因子:
3.2
通讯作者:
J. Zeilstra
J. Zeilstra
中科院分区:
生物学3区
文献类型:
--
作者:
Linda Fales;L. Kryszak;J. Zeilstra

文献摘要

参考文献

被引文献

相似文献

摘要所有四吡咯的共同前体是5-氨基乙酰丙酸(ALA),在类球红细菌中,它通过Shemin途径形成。ALA合成酶活性由两个差异调节的基因编码。sphaeroides 2.4.1:hemA和hemT。在我们的调查ofhemA调节,我们应用转座子诱变在有氧条件下,随后通过选择,确定转座子插入突变体中hemA表达升高。这些突变体中的一种先前已被表征(J. Zeilstra-Ryalls和S. Kaplan,J. Bacteriol. 178:985-993,1996),并且在此我们描述了我们对第二突变株的分析。该转座子插入到hbdA的编码序列中,编码S-(+)-β-羟丁酰辅酶A脱氢酶,催化NAD依赖性反应。我们提供的证据表明,thehbdA基因产物参与聚羟基丁酸酯(PHB)的代谢,并根据我们的研究结果,我们讨论的可能性,以如何有缺陷的PHB代谢可能会改变hemA的表达水平。
ABSTRACT The common precursor to all tetrapyrroles is 5-aminolevulinic acid (ALA), and in Rhodobacter sphaeroides its formation occurs via the Shemin pathway. ALA synthase activity is encoded by two differentially regulated genes in R. sphaeroides 2.4.1:hemA and hemT. In our investigations ofhemA regulation, we applied transposon mutagenesis under aerobic conditions, followed by a selection that identified transposon insertion mutants in which hemA expression is elevated. One of these mutants has been characterized previously (J. Zeilstra-Ryalls and S. Kaplan, J. Bacteriol. 178:985–993, 1996), and here we describe our analysis of a second mutant strain. The transposon inserted into the coding sequences of hbdA, coding forS-(+)-β-hydroxybutyryl–coenzyme A dehydrogenase and catalyzing an NAD-dependent reaction. We provide evidence that thehbdA gene product participates in polyhydroxybutyrate (PHB) metabolism and, based on our findings, we discuss possibilities as to how defective PHB metabolism might alter the level of hemAexpression.
DOI: --
发表时间: 1994-04
期刊: BioTechniques
影响因子: 2.7
作者:
Michael E. Kovach;R. Phillips;P. Elzer;R. Roop;K. Peterson
通讯作者: Michael E. Kovach;R. Phillips;P. Elzer;R. Roop;K. Peterson
脱氮副球菌电子转移黄素蛋白亚基编码基因的克隆、测序和表达。
DOI: --
发表时间: 1993
期刊: The Journal of biological chemistry
影响因子: --
作者:
Bedzyk,LA;Escudero,KW;Gill,RE;Griffin,KJ;Frerman,FE
通讯作者: Frerman,FE
线粒体烯酰辅酶 A 水合酶的细菌同源物。
DOI: 10.1016/0378-1119(91)90313-z
发表时间: 1991
期刊: Gene
影响因子: 3.5
作者:
Beckman,DL;Kranz,RG
通讯作者: Kranz,RG
球形红杆菌 5-氨基乙酰丙酸合酶基因的克隆和表征。
DOI: 10.1016/0378-1119(88)90112-6
发表时间: 1988
期刊: Gene
影响因子: 3.5
作者:
Tai,TN;Moore,MD;Kaplan,S
通讯作者: Kaplan,S