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Title: Opposing reactions in coenzyme A metabolism sensitize Mycobacterium tuberculosis to enzyme inhibition

Journal Article · · Science
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Mycobacterium tuberculosis (Mtb) is the leading infectious cause of death in humans. Synthesis of lipids critical for Mtb’s cell wall and virulence depends on phosphopantetheinyl transferase (PptT), an enzyme that transfers 4'-phosphopantetheine (Ppt) from coenzyme A (CoA) to diverse acyl carrier proteins. We identified a compound that kills Mtb by binding and partially inhibiting PptT. Killing of Mtb by the compound is potentiated by another enzyme encoded in the same operon, Ppt hydrolase (PptH), that undoes the PptT reaction. Thus, loss-of-function mutants of PptH displayed antimicrobial resistance. Our PptT-inhibitor cocrystal structure may aid further development of antimycobacterial agents against this long-sought target. The opposing reactions of PptT and PptH uncover a regulatory pathway in CoA physiology.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Institute of Allergy and Infectious Diseases (NIAID); Abby and Howard P. Milstein Program in Chemical Biology and Translational Medicine; Welch Foundation; TB Structural Genomics; Bill and Melinda Gates Foundation; National Cancer Institute (NCI); William Randolph Hearst Foundation
Grant/Contract Number:
AC02-06CH11357; U19AI-111143; A-0015; P01AI095208; P30 CA008748
OSTI ID:
1504971
Journal Information:
Science, Vol. 363, Issue 6426; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 37 works
Citation information provided by
Web of Science

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Cited By (3)

Structural insights into phosphopantetheinyl hydrolase PptH from Mycobacterium tuberculosis journal January 2020
Drug-resistance in Mycobacterium tuberculosis : where we stand journal January 2019
Harnessing Biological Insight to Accelerate Tuberculosis Drug Discovery journal July 2019