The Sulfide-Responsive SqrR/BigR Homologous Regulator YgaV of Escherichia coli Controls Expression of Anaerobic Respiratory Genes and Antibiotic Tolerance.

The Sulfide-Responsive SqrR/BigR Homologous Regulator YgaV of Escherichia coli Controls Expression of Anaerobic Respiratory Genes and Antibiotic Tolerance.
复制标题

DOI:
10.3390/antiox11122359
复制
发表时间:
2022-11-28
期刊:
Antioxidants (Basel, Switzerland)
影响因子:
--
通讯作者:
--
中科院分区:
其他
文献类型:
--
作者:

文献摘要

参考文献

被引文献

相似文献

胃肠道细菌菌群的组成和活性显着影响宿主人和动物的新陈代谢、健康和疾病。如果氧张力受到限制,这些肠道细菌可以在需氧和厌氧生长之间切换。有趣的是,这种转换机制对于防止活性氧(ROS)的产生和抗生素耐受性非常重要。研究还表明,细胞内和细胞外的硫化物分子参与了这种转换控制,尽管其机制尚未完全阐明。在这里,我们发现 YgaV 是一种硫化物响应转录因子 SqrR/BigR 同源物,在体内和体外对硫化物化合物做出反应,以控制厌氧呼吸基因的表达。 YgaV 还对肠道细菌大肠杆菌中的 H2O2 清除作出反应。尽管野生型(WT)在H2S气氛条件下表现出增强的抗生素耐受性,但ygaV突变体并未表现出这样的表型。此外,在存在和不存在外源 H2S 的情况下,两种类型的突变体的抗生素敏感性均高于 WT。因此,这些结果表明 YgaV 依赖性转录调控负责维持氧化还原稳态、ROS 清除和抗生素耐受性。
Compositions and activities of bacterial flora in the gastrointestinal tract significantly influence the metabolism, health, and disease of host humans and animals. These enteric bacteria can switch between aerobic and anaerobic growth if oxygen tension becomes limited. Interestingly, the switching mechanism is important for preventing reactive oxygen species (ROS) production and antibiotic tolerance. Studies have also shown that intracellular and extracellular sulfide molecules are involved in this switching control, although the mechanism is not fully clarified. Here, we found that YgaV, a sulfide-responsive transcription factor SqrR/BigR homolog, responded to sulfide compounds in vivo and in vitro to control anaerobic respiratory gene expression. YgaV also responded to H2O2 scavenging in the enteric bacterium Escherichia coli. Although the wild-type (WT) showed increased antibiotic tolerance under H2S-atmospheric conditions, the ygaV mutant did not show such a phenotype. Additionally, antibiotic sensitivity was higher in the mutant than in the WT of both types in the presence and absence of exogenous H2S. These results, therefore, indicated that YgaV-dependent transcriptional regulation was responsible for maintaining redox homeostasis, ROS scavenging, and antibiotic tolerance.
DOI: 10.1093/bioinformatics/btu638
发表时间: 2015-01-15
期刊: Bioinformatics (Oxford, England)
影响因子: --
作者:
Anders S;Pyl PT;Huber W
通讯作者: Huber W
DOI: 10.1128/genomea.01038-14
发表时间: 2014-10-16
期刊: Genome announcements
影响因子: --
作者:
Grenier F;Matteau D;Baby V;Rodrigue S
通讯作者: Rodrigue S
转录调节剂中硫化物感应特异性的结构基础。
DOI: 10.1038/s41589-020-00671-9
发表时间: 2021-01
影响因子: 14.8
作者:
Capdevila DA;Walsh BJC;Zhang Y;Dietrich C;Gonzalez-Gutierrez G;Giedroc DP
通讯作者: Giedroc DP
DOI: 10.1126/science.1232688
发表时间: 2013-03-08
期刊: SCIENCE
影响因子: 56.9
作者:
Keren, Iris;Wu, Yanxia;Lewis, Kim
通讯作者: Lewis, Kim
OxyR 感知硫烷硫并激活基因以将其在大肠杆菌中去除
DOI: 10.1016/j.redox.2019.101293
发表时间: 2019-09-01
期刊: REDOX BIOLOGY
影响因子: 11.4
作者:
Hou, Ningke;Yan, Zhenzhen;Liu, Huaiwei
通讯作者: Liu, Huaiwei