Multi-omic regulatory networks capture downstream effects of kinase inhibition in Mycobacterium tuberculosis

NPJ Syst Biol Appl. 2021 Jan 29;7(1):8. doi: 10.1038/s41540-020-00164-4.

Abstract

The ability of Mycobacterium tuberculosis (Mtb) to adapt to diverse stresses in its host environment is crucial for pathogenesis. Two essential Mtb serine/threonine protein kinases, PknA and PknB, regulate cell growth in response to environmental stimuli, but little is known about their downstream effects. By combining RNA-Seq data, following treatment with either an inhibitor of both PknA and PknB or an inactive control, with publicly available ChIP-Seq and protein-protein interaction data for transcription factors, we show that the Mtb transcription factor (TF) regulatory network propagates the effects of kinase inhibition and leads to widespread changes in regulatory programs involved in cell wall integrity, stress response, and energy production, among others. We also observe that changes in TF regulatory activity correlate with kinase-specific phosphorylation of those TFs. In addition to characterizing the downstream regulatory effects of PknA/PknB inhibition, this demonstrates the need for regulatory network approaches that can incorporate signal-driven transcription factor modifications.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Bacterial Proteins / antagonists & inhibitors
  • Bacterial Proteins / genetics
  • Bacterial Proteins / metabolism*
  • Cell Wall / metabolism
  • Gene Expression / genetics
  • Gene Expression Regulation, Bacterial / genetics
  • Mycobacterium tuberculosis / drug effects
  • Mycobacterium tuberculosis / growth & development
  • Mycobacterium tuberculosis / metabolism
  • Phosphorylation / drug effects
  • Protein Kinase Inhibitors / metabolism
  • Protein Kinase Inhibitors / pharmacology*
  • Protein Serine-Threonine Kinases / antagonists & inhibitors
  • Protein Serine-Threonine Kinases / genetics
  • Protein Serine-Threonine Kinases / metabolism*

Substances

  • Bacterial Proteins
  • Protein Kinase Inhibitors
  • PknA protein, Mycobacterium tuberculosis
  • PknB protein, Mycobacterium tuberculosis
  • Protein Serine-Threonine Kinases