GsmR, a response regulator with an HD-related output domain in Xanthomonas campestris, is positively controlled by Clp and is involved in the expression of genes responsible for flagellum synthesis

doi:10.1111/febs.12061

中山醫學大學機構典藏 CSMUIR > 醫學科技學院 > 生物醫學科學學系暨碩士班 > 期刊論文 > Item 310902500/19251

Please use this identifier to cite or link to this item: https://ir.csmu.edu.tw:8080/ir/handle/310902500/19251

Title:	GsmR, a response regulator with an HD-related output domain in Xanthomonas campestris, is positively controlled by Clp and is involved in the expression of genes responsible for flagellum synthesis
Authors:	YF, Liu CT, Liao WL, Song PC, Hsu SC, Du HH, Lo YM, Hsiao
Contributors:	中山醫學大學
Date:	2013-01
Issue Date:	2018-06-21T08:40:03Z (UTC)
Publisher:	FEBS J
ISSN:	1742-464X
Abstract:	In prokaryotes, two-component signal transduction systems, consisting of a histidine kinase and a response regulator, play a critical role in regulating a range of cellular functions. A recent study suggests that XCC3315, a response regulator with a CheY-like receiver domain attached to an uncharacterized HD-related output domain (HDOD domain), plays a role in the general stress response of the Gram-negative bacterium Xanthomonas campestris pv. campestris (Xcc), the causal agent of black rot in cruciferous plants. Here, we demonstrated genetically that XCC3315, designated as gsmR (general stress and motility regulator), is involved in the expression of genes responsible for flagellum synthesis, including rpoN2, flhF, flhB, and fliC. Site-directed mutagenesis revealed that Glu9 and Arg100 in the receiver domain and Gly205, Asp263, His287, Trp298 and His311 in the HDOD are critical amino acids for GsmR function in cell motility regulation. The gsmR transcription initiation site was mapped. Promoter analysis and gel retardation assay revealed that the expression of gsmR is positively controlled by the global transcriptional regulator Clp in a direct manner, and is subject to catabolite repression. Our findings not only extend the previous work on Clp regulation to show that it influences the expression of gsmR in Xcc, but are also the first to characterize the expression of this response regulator gene in this phytopathogen. Furthermore, GsmR is the first HDOD-containing protein of bacteria in which key amino acids have been experimentally identified and characterized.
URI:	http://dx.doi.org/10.1111/febs.12061 https://ir.csmu.edu.tw:8080/ir/handle/310902500/19251
Relation:	FEBS J. 2013 Jan;280(1):199-213
Appears in Collections:	[生物醫學科學學系暨碩士班] 期刊論文

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