FlgV forms a flagellar motor ring that is required for optimal motility of Helicobacter pylori.

FlgV forms a flagellar motor ring that is required for optimal motility of Helicobacter pylori.
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DOI:
10.1371/journal.pone.0287514
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发表时间:
2023
期刊:
影响因子:
3.7
通讯作者:
--
中科院分区:
综合性期刊3区
文献类型:
--
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鞭毛驱动的运动对于幽门螺杆菌在人类胃中的定植是必不可少的,它会导致多种疾病,包括慢性胃炎、消化性溃疡疾病和胃癌。幽门螺杆菌已经进化出一种高扭矩产生鞭毛马达,它拥有典型的大肠杆菌马达中没有的几个附件。FlgV是在空肠弯曲菌中发现的最早的鞭毛辅助蛋白之一,但其结构和功能尚不清楚。在这里,我们证实了H.Pylori B128中flgV的缺失和Hp G27(G27M)的一个高运动性变异导致了软琼脂中运动性的降低。对野生型ΔFlgV和一个表达FlgV-YFP的菌株的原位鞭毛马达结构的比较分析表明,FlgV形成了一个与两个高度保守的鞭毛成分MS环和C环连接密切相关的环状结构。我们的研究结果表明,FlgV环特别适用于弯曲菌,以支持高扭矩发电电机的组装和高效功能。
Flagella-driven motility is essential for Helicobacter pylori to colonize the human stomach, where it causes a variety of diseases, including chronic gastritis, peptic ulcer disease, and gastric cancer. H. pylori has evolved a high-torque-generating flagellar motor that possesses several accessories not found in the archetypical Escherichia coli motor. FlgV was one of the first flagellar accessory proteins identified in Campylobacter jejuni, but its structure and function remain poorly understood. Here, we confirm that deletion of flgV in H. pylori B128 and a highly motile variant of H. pylori G27 (G27M) results in reduced motility in soft agar medium. Comparative analyses of in-situ flagellar motor structures of wild-type, ΔflgV, and a strain expressing FlgV-YFP showed that FlgV forms a ring-like structure closely associated with the junction of two highly conserved flagellar components: the MS and C rings. The results of our studies suggest that the FlgV ring has adapted specifically in Campylobacterota to support the assembly and efficient function of the high-torque-generating motors.
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发表时间: 1998-03-01
期刊: MOLECULAR AND GENERAL GENETICS
影响因子: --
作者:
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