Acetyl-CoA-mediated activation of Mycobacterium tuberculosis isocitrate lyase 2.
Bhusal, R.P., Jiao, W., Kwai, B.X.C., Reynisson, J., Collins, A.J., Sperry, J., Bashiri, G., Leung, I.K.H.(2019) Nat Commun 10: 4639-4639
- PubMed: 31604954
- DOI: https://doi.org/10.1038/s41467-019-12614-7
- Primary Citation of Related Structures:
6EDW, 6EDZ, 6EE1 - PubMed Abstract:
Isocitrate lyase is important for lipid utilisation by Mycobacterium tuberculosis but its ICL2 isoform is poorly understood. Here we report that binding of the lipid metabolites acetyl-CoA or propionyl-CoA to ICL2 induces a striking structural rearrangement, substantially increasing isocitrate lyase and methylisocitrate lyase activities. Thus, ICL2 plays a pivotal role regulating carbon flux between the tricarboxylic acid (TCA) cycle, glyoxylate shunt and methylcitrate cycle at high lipid concentrations, a mechanism essential for bacterial growth and virulence.
Organizational Affiliation:
School of Chemical Sciences, The University of Auckland, Private Bag 92019, Victoria Street West, Auckland, 1142, New Zealand.