YjbH regulates virulence genes expression and oxidative stress resistance in Staphylococcus aureus. Issue 1 (1st January 2021)

• Record Type: Journal Article
• Authors: Paudel, Atmika; Panthee, Suresh; Hamamoto, Hiroshi; Grunert, Tom; Sekimizu, Kazuhisa
• Is Part Of: Virulence. Volume 12:Issue 1(2021)
• Page Start: 470
• Page End: 480
• Publication Date: 2021-01-01
• Subjects: Staphylococcus aureus -- virulence -- YjbH -- YjbI -- oxidative stress -- surface structure -- gene expression -- protease -- pigment -- silkworm; Virulence (Microbiology) -- Periodicals; Bacterial diseases -- Periodicals; Molecular microbiology -- Periodicals; 579.05
• DOI: 10.1080/21505594.2021.1875683
• Languages: English
• ISSNs: 2150-5608

Abstract

ABSTRACT: We previously reported that disruption of the yjbI gene reduced virulence of Staphylococcus aureus . In this study, we found virulence in both silkworms and mice was restored by introducing the yjbH gene but not the yjbI gene to both yjbI and yjbH genes-disrupted mutants, suggesting that yjbH, the gene downstream to the yjbI gene in a two-gene operon- yjbIH, is responsible for this phenomenon. We further observed a decrease in various surface-associated proteins and changes in cell envelope glycostructures in the mutants. RNA-seq analysis revealed that disruption of the yjbI and the yjbH genes resulted in differential expression of a broad range of genes, notably, significant downregulation of genes involved in virulence and oxidative stress. Administration of N-acetyl-L-cysteine, a free-radical scavenger, restored the virulence in both the mutants. Our findings suggested that YjbH plays a role in staphylococcal pathogenicity by regulating virulence gene expression, affecting the bacterial surface structure, and conferring resistance to oxidative stress in a host.