Novel (p)ppGpp Binding and Metabolizing Proteins of
<i>Escherichia coli</i>
作者:Yong Zhang、Eva Zborníková、Dominik Rejman、Kenn Gerdes
DOI:10.1128/mbio.02188-17
日期:2018.5.2
(p)ppGpp-protein interactions. We discovered 12 new (p)ppGpp targets in E. coli that, based on their physiological functions, could be classified into four major groups, involved in (i) purine nucleotide homeostasis (YgdH), (ii) ribosome biogenesis and translation (RsgA, Era, HflX, and LepA), (iii) maturation of dehydrogenases (HypB), and (iv) metabolism of (p)ppGpp (MutT, NudG, TrmE, NadR, PhoA, and UshA)
警铃(p)ppGpp通过增加对各种营养限制和化学伤害(包括抗生素)的耐受性,在基本细菌应激反应中发挥关键作用。尽管自从(p)ppGpp在4年前被发现以来就进行了深入研究,但尚未在大肠杆菌中系统地鉴定(p)ppGpp结合蛋白。我们应用DRaCALA(配体分析的不同径向毛细管作用)来鉴定(p)ppGpp-蛋白相互作用。我们在大肠杆菌中发现了12个新的(p)ppGpp靶标,根据它们的生理功能,它们可分为四个主要组,涉及(i)嘌呤核苷酸稳态(YgdH),(ii)核糖体生物发生和翻译(RsgA (Era,HflX和LepA),(iii)脱氢酶(HypB)的成熟和(iv)(p)ppGpp(MutT,NudG,TrmE,NadR,PhoA和UshA)的代谢。我们目前对这些新型(p)ppGpp靶标进行全面,比较的生化和生理表征,并对相关的已知(p)ppGpp结合蛋白进行比较分析。通过这种方法,鉴定了大肠杆