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
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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
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发表时间:
2001
影响因子:
3.2
通讯作者:
J. Zeilstra
中科院分区:
文献类型:
--
作者:
Linda Fales;L. Kryszak;J. Zeilstra
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.
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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
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
影响因子:
3.5
作者:
Beckman,DL;Kranz,RG
通讯作者:
Kranz,RG
影响因子:
3.5
作者:
Tai,TN;Moore,MD;Kaplan,S
通讯作者:
Kaplan,S