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Bockman MR, Engelhart CA, Cramer JD, Howe MD, Mishra NK, Zimmerman M, Larson P, Alvarez-Cabrera N, Park SW, Boshoff HIM, Bean JM, Young VG, Ferguson DM, Dartois V, Jarrett JT, Schnappinger D, Aldrich CC. Investigation of ( S)-(-)-Acidomycin: A Selective Antimycobacterial Natural Product That Inhibits Biotin Synthase. ACS Infect Dis 2019; 5:598-617. [PMID: 30652474 DOI: 10.1021/acsinfecdis.8b00345] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The synthesis, absolute stereochemical configuration, complete biological characterization, mechanism of action and resistance, and pharmacokinetic properties of ( S)-(-)-acidomycin are described. Acidomycin possesses promising antitubercular activity against a series of contemporary drug susceptible and drug-resistant M. tuberculosis strains (minimum inhibitory concentrations (MICs) = 0.096-6.2 μM) but is inactive against nontuberculosis mycobacteria and Gram-positive and Gram-negative pathogens (MICs > 1000 μM). Complementation studies with biotin biosynthetic pathway intermediates and subsequent biochemical studies confirmed acidomycin inhibits biotin synthesis with a Ki of approximately 1 μM through the competitive inhibition of biotin synthase (BioB) and also stimulates unproductive cleavage of S-adenosyl-l-methionine (SAM) to generate the toxic metabolite 5'-deoxyadenosine. Cell studies demonstrate acidomycin selectively accumulates in M. tuberculosis providing a mechanistic basis for the observed antibacterial activity. The development of spontaneous resistance by M. tuberculosis to acidomycin was difficult, and only low-level resistance to acidomycin was observed by overexpression of BioB. Collectively, the results provide a foundation to advance acidomycin and highlight BioB as a promising target.
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Affiliation(s)
- Matthew R. Bockman
- Department of Medicinal Chemistry, University of Minnesota, 308 Harvard Street SE, Minneapolis, Minnesota 55455, United States
| | - Curtis A. Engelhart
- Department of Microbiology and Immunology, Weill Cornell Medical College, 1300 York Avenue, New York, New York 10021, United States
| | - Julia D. Cramer
- Department of Chemistry, University of Hawaii at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Michael D. Howe
- Department of Medicinal Chemistry, University of Minnesota, 308 Harvard Street SE, Minneapolis, Minnesota 55455, United States
| | - Neeraj K. Mishra
- Department of Medicinal Chemistry, University of Minnesota, 308 Harvard Street SE, Minneapolis, Minnesota 55455, United States
| | - Matthew Zimmerman
- Public Health Research Institute, Rutgers, The State University of New Jersey, 225 Warren Street, Newark, New Jersey 07103, United States
| | - Peter Larson
- Department of Medicinal Chemistry, University of Minnesota, 308 Harvard Street SE, Minneapolis, Minnesota 55455, United States
| | - Nadine Alvarez-Cabrera
- Public Health Research Institute, Rutgers, The State University of New Jersey, 225 Warren Street, Newark, New Jersey 07103, United States
| | - Sae Woong Park
- Department of Microbiology and Immunology, Weill Cornell Medical College, 1300 York Avenue, New York, New York 10021, United States
| | - Helena I. M. Boshoff
- Tuberculosis Research Section, Laboratory of Clinical Immunology and Microbiology, NIAID, NIH, 5601 Fishers Lane, Bethesda, Maryland 20892, United States
| | - James M. Bean
- Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, New York 10065, United States
| | - Victor G. Young
- X-Ray Crystallographic Laboratory, LeClaire-Dow Chemical Instrumentation Facility, Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - David M. Ferguson
- Department of Medicinal Chemistry, University of Minnesota, 308 Harvard Street SE, Minneapolis, Minnesota 55455, United States
| | - Veronique Dartois
- Public Health Research Institute, Rutgers, The State University of New Jersey, 225 Warren Street, Newark, New Jersey 07103, United States
| | - Joseph T. Jarrett
- Department of Chemistry, University of Hawaii at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Dirk Schnappinger
- Department of Microbiology and Immunology, Weill Cornell Medical College, 1300 York Avenue, New York, New York 10021, United States
| | - Courtney C. Aldrich
- Department of Medicinal Chemistry, University of Minnesota, 308 Harvard Street SE, Minneapolis, Minnesota 55455, United States
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