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NU-6027 Inhibits Growth of Mycobacterium Tuberculosis by Targeting Protein Kinase D and Protein Kinase G

NU-6027 Inhibits Growth of Mycobacterium Tuberculosis by Targeting Protein Kinase D and Protein Kinase G

Saqib Kidwai, Rania Bouzeyen, Sohini Chakraborti, Neha Khare, Sumana Das, Tannu Priya Gosain, Assirbad Behura, Chhuttan Lal Meena, Rohan Dhiman, Makram Essafi, Avinash Bajaj, Deepak Kumar Saini, Narayanaswamy Srinivasan, etc.

Antimicrob Agents Chemother. 2019 Aug 23;63(9):e00996-19.

PMID: 31285226

Abstract:

Tuberculosis (TB) is a global health concern, and this situation has further worsened due to the emergence of drug-resistant strains and the failure of BCG vaccine to impart protection. There is an imperative need to develop highly sensitive, specific diagnostic tools, novel therapeutics, and vaccines for the eradication of TB. In the present study, a chemical screen of a pharmacologically active compound library was performed to identify antimycobacterial compounds. The phenotypic screen identified a few novel small-molecule inhibitors, including NU-6027, a known CDK-2 inhibitor. We demonstrate that NU-6027 inhibits Mycobacterium bovis BCG growth in vitro and also displayed cross-reactivity with Mycobacterium tuberculosis protein kinase D (PknD) and protein kinase G (PknG). Comparative structural and sequence analysis along with docking simulation suggest that the unique binding site stereochemistry of PknG and PknD accommodates NU-6027 more favorably than other M. tuberculosis Ser/Thr protein kinases. Further, we also show that NU-6027 treatment induces the expression of proapoptotic genes in macrophages. Finally, we demonstrate that NU-6027 inhibits M. tuberculosis growth in both macrophage and mouse tissues. Taken together, these results indicate that NU-6027 can be optimized further for the development of antimycobacterial agents.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP220036088	NU6027		220036-08-8	Price

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