Abrahams, Katherine A., Chung, Chun-Wa, Ghidelli-Disse, Sonja, Rullas, Joaquín, Rebollo-López, María José, Gurcha, Sudagar S., Cox, Jonathan A.G., Mendoza, Alfonso, Jiménez-Navarro, Elena, Martínez-Martínez, María Santos, Neu, Margarete, Shillings, Anthony, Homes, Paul, Argyrou, Argyrides, Casanueva, Ruth, Loman, Nicholas J., Moynihan, Patrick J., Lelièvre, Joël, Selenski, Carolyn, Axtman, Matthew, Kremer, Laurent, Bantscheff, Marcus, Angulo-Barturen, Iñigo, Izquierdo, Mónica Cacho, Cammack, Nicholas C., Drewes, Gerard, Ballell, Lluis, Barros, David, Besra, Gurdyal S. and Bates, Robert H. (2016). Identification of KasA as the cellular target of an anti-tubercular scaffold. Nature Communications, 7 ,
Abstract
Phenotypic screens for bactericidal compounds are starting to yield promising hits against tuberculosis. In this regard, whole-genome sequencing of spontaneous resistant mutants generated against an indazole sulfonamide (GSK3011724A) identifies several specific single-nucleotide polymorphisms in the essential Mycobacterium tuberculosis β-ketoacyl synthase (kas) A gene. Here, this genomic-based target assignment is confirmed by biochemical assays, chemical proteomics and structural resolution of a KasA-GSK3011724A complex by X-ray crystallography. Finally, M. tuberculosis GSK3011724A-resistant mutants increase the in vitro minimum inhibitory concentration and the in vivo 99% effective dose in mice, establishing in vitro and in vivo target engagement. Surprisingly, the lack of target engagement of the related β-ketoacyl synthases (FabH and KasB) suggests a different mode of inhibition when compared with other Kas inhibitors of fatty acid biosynthesis in bacteria. These results clearly identify KasA as the biological target of GSK3011724A and validate this enzyme for further drug discovery efforts against tuberculosis.
| Publication DOI: | https://doi.org/10.1038/ncomms12581 |
|---|---|
| Divisions: | College of Health & Life Sciences College of Health & Life Sciences > School of Biosciences > Cell & Tissue Biomedical Research |
| Additional Information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ Funding: EU FP7 (261378); Bill & Melinda Gates Foundation (OPP1095631; and MRC (MR/K012118/1). |
| Uncontrolled Keywords: | Journal Article |
| Publication ISSN: | 2041-1723 |
| Last Modified: | 30 Oct 2024 08:18 |
| Date Deposited: | 25 May 2017 08:20 |
| Full Text Link: | |
| Related URLs: |
https://www.ebi ... /entry/pdb/5ld8
(Related URL) |
PURE Output Type: | Article |
| Published Date: | 2016-09-01 |
| Accepted Date: | 2016-07-14 |
| Submitted Date: | 2015-11-25 |
| Authors: |
Abrahams, Katherine A.
Chung, Chun-Wa Ghidelli-Disse, Sonja Rullas, Joaquín Rebollo-López, María José Gurcha, Sudagar S. Cox, Jonathan A.G. ( 
0000-0001-5208-4056)
Mendoza, Alfonso Jiménez-Navarro, Elena Martínez-Martínez, María Santos Neu, Margarete Shillings, Anthony Homes, Paul Argyrou, Argyrides Casanueva, Ruth Loman, Nicholas J. Moynihan, Patrick J. Lelièvre, Joël Selenski, Carolyn Axtman, Matthew Kremer, Laurent Bantscheff, Marcus Angulo-Barturen, Iñigo Izquierdo, Mónica Cacho Cammack, Nicholas C. Drewes, Gerard Ballell, Lluis Barros, David Besra, Gurdyal S. Bates, Robert H. |
CORE (COnnecting REpositories)
CORE (COnnecting REpositories)