c-di-GMP信号途径对细菌致病性的调控作用

Cyclic Diguanylate Signalling in Regulation of Bacterial Pathogenesis

摘要:

环鸟苷二磷酸(c-di-GMP)是一种广泛存在于细菌中的新型第二信使。鸟苷酸环化酶(DGC)和磷酸二脂酶(PDE)分别控制了c-di-GMP的合成和降解, 其中DGC活性由GGDEF结构域决定, PDE活性由EAL和HD-GYP结构域决定。c-di-GMP调控着细菌多种生物学功能, 抑制毒性因子产生和运动性, 促进生物膜形成。c-di-GMP下游是一个包括转录、翻译以及翻译后等多层次的复杂调控网络。本文结合本室有关水稻白叶枯病菌的研究结果, 综述近年来国内外在c-di-GMP研究领域的最新进展。

Abstract:

Cyclic diguanylate (c-di-GMP) is a bacterial second messenger of growing recognition involved in the regulation of a number of complex physiological processes. In combinations to the related progress of Xanthomonas oryzae pv. oryzae, the causing agent of bacterial blight of rice in our lab, this review describes (1) the biosynthesis and hydrolysis of c-di-GMP and several mechanisms of regulation of c-di-GMP metabolism, (2) the contribution of c-di-GMP to regulating virulence, motility and biofilm formation, processes that affect pathogenesis of many bacteria, and (3) ways in which c-di-GMP may mediate these regulatory effects.