OxyR-Like Improves Cell Hydrogen Peroxide Tolerance by Participating in Monocyte Chemotaxis and Oxidative Phosphorylation Regulation in Magnetospirillum Gryphiswaldense MSR-1.
J Biomed Nanotechnol
; 17(12): 2466-2476, 2021 Dec 01.
Article
em En
| MEDLINE
| ID: mdl-34974869
ABSTRACT
The formation of magnetosomes inside magnetotactic bacteria is a complex process strictly controlled by the intracellular metabolic regulatory system. A series of transcriptional regulators are involved in the biosynthesis of the magnetosome, including OxyR-Like protein, which is indispensable for the maturation of magnetosomes in Magnetospirillum Gryphiswaldense MSR-1. In this study, a new function of the OxyR-Like protein that helps cells resist reactive oxygen species (ROS) was identified. A comparison of expression profile data between wild-type MSR-1 and an oxyR-Like defective mutant demonstrated that seven genes encoding chemotaxis proteins were down-regulated in the latter. On the contrary, the expression levels of numerous genes encoding proteins that are critical for cellular aerobic respiration were up-regulated. Thus, OxyR-Like enhanced the resistance of cells to ROS by increasing their environmental perception and maintaining their oxidative phosphorylation at a reasonable level to avoid the excessive production of endogenous ROS. These results increase our knowledge of the OxyR-Like regulatory network and establish a relationship between the antioxidant metabolic pathway and magnetosome biomineralization in MSR-1.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Magnetospirillum
/
Peróxido de Hidrogênio
Idioma:
En
Revista:
J Biomed Nanotechnol
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
China