Rxivist logo

Identification of Genes Regulating Cell Death in Staphylococcus aureus

By Rebecca Yee, Jie Feng, Jiou Wang, Jiazhen Chen, Ying Zhang

Posted 06 Mar 2019
bioRxiv DOI: 10.1101/569053 (published DOI: 10.3389/fmicb.2019.02199)

Staphylococcus aureus is an opportunistic pathogen that causes acute and chronic infections. Due to S. aureus' s highly resistant and persistent nature, it is paramount to identify better drug targets in order to eradicate S. aureus infections. Despite the efforts in understanding bacterial cell death, the genes and pathways of S. aureus cell death remain elusive. Here, we performed a genome-wide screen using a transposon mutant library to study the genetic mechanisms involved in S. aureus cell death. Using a precisely controlled heat-ramp and acetic acid exposure assays, mutations in 27 core genes (hsdR1, hslO, nsaS, sspA, folD, mfd, vraF, kdpB, USA300HOU_2684, 0868, 0369, 0420, 1154, 0142, 0930, 2590, 0997, 2559, 0044, 2004, 1209, 0152, 2455, 0154, 2386, 0232, 0350 involved in transporters, transcription, metabolism, peptidases, kinases, transferases, SOS response, nucleic acid and protein synthesis) caused the bacteria to be more death-resistant. In addition, we identified mutations in core 10 genes (capA, gltT, mnhG1, USA300HOU_1780, 2496, 0200, 2029, 0336, 0329, 2386, involved in transporters, metabolism, transcription, cell wall synthesis) from heat-ramp and acetic acid that caused the bacteria to be more death-sensitive or with defect in persistence. Interestingly, death-resistant mutants were more virulent than the parental strain USA300 and caused increased mortality in a Caenorhabditis elegans infection model. Conversely, death-sensitive mutants were less persistent and formed less persister cells upon exposure to different classes of antibiotics. These findings provide new insights into the mechanisms of S. aureus cell death and offer new therapeutic targets for developing more effective treatments caused by S. aureus.

Download data

  • Downloaded 295 times
  • Download rankings, all-time:
    • Site-wide: 63,828 out of 109,465
    • In microbiology: 5,016 out of 9,238
  • Year to date:
    • Site-wide: 89,045 out of 109,465
  • Since beginning of last month:
    • Site-wide: 71,920 out of 109,465

Altmetric data


Downloads over time

Distribution of downloads per paper, site-wide


PanLingua

Sign up for the Rxivist weekly newsletter! (Click here for more details.)


News