An Adenosine Kinase Exists in Xanthomonas campestris Pathovar campestris and Is Involved in Extracellular Polysaccharide Production, Cell Motility, and Virulence
An Adenosine Kinase Exists in Xanthomonas campestris Pathovar campestris and Is Involved in Extracellular Polysaccharide Production, Cell Motility, and Virulence
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腺苷激酶存在于野油菜黄单胞菌中,参与细胞外多糖的产生、细胞运动和毒力
DOI:
10.1128/jb.00009-09
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发表时间:
2009-03
影响因子:
3.2
通讯作者:
陆光涛
中科院分区:
文献类型:
--
作者:
陆光涛
ABSTRACT Adenosine kinase (ADK) is a purine salvage enzyme and a typical housekeeping enzyme in eukaryotes which catalyzes the phosphorylation of adenosine to form AMP. Since prokaryotes synthesize purines de novo and no endogenous ADK activity is detectable in Escherichia coli, ADK has long been considered to be rare in bacteria. To date, only two prokaryotes, both of which are gram-positive bacteria, have been reported to contain ADK. Here we report that the gram-negative bacterium Xanthomonas campestris pathovar campestris, the causal agent of black rot of crucifers, possesses a gene (designated adk Xcc) encoding an ADK (named ADKXcc), and we demonstrate genetically that the ADKXcc is involved in extracellular polysaccharide (EPS) production, cell motility, and pathogenicity of X. campestris pv. campestris. adk Xcc was overexpressed as a His6-tagged protein in E. coli, and the purified His6-tagged protein exhibited ADK activity. Mutation of adk Xcc did not affect bacterial growth in rich and minimal media but led to an accumulation of intracellular adenosine and diminutions of intracellular ADK activity and ATP level, as well as EPS. The adk Xcc mutant displayed significant reductions in bacterial growth and virulence in the host plant.
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DOI:
10.1016/b978-1-4832-2915-7.50011-x
发表时间:
1961
期刊:
--
影响因子:
--
作者:
M. Schulman
通讯作者:
M. Schulman
影响因子:
2.6
作者:
K. Lecoq;I. Belloc;C. Des̀granges;Bertrand Daignan-Fornier
通讯作者:
K. Lecoq;I. Belloc;C. Des̀granges;Bertrand Daignan-Fornier
影响因子:
3.2
作者:
BAYOT, RG;RIES, SM
通讯作者:
RIES, SM
影响因子:
2.8
作者:
T. Jarman;G. W. Pace
通讯作者:
T. Jarman;G. W. Pace
影响因子:
1.9
作者:
A. Slusarenko;R. Fraser;L. C. Loon
通讯作者:
A. Slusarenko;R. Fraser;L. C. Loon