An allosteric inhibitor of bacterial Hsp70 chaperone potentiates antibiotics and mitigates resistance.

An allosteric inhibitor of bacterial Hsp70 chaperone potentiates antibiotics and mitigates resistance.
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DOI:
10.1016/j.chembiol.2021.11.004
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发表时间:
2022-05-19
影响因子:
8.6
通讯作者:
Lupoli, Tania J.
Lupoli, Tania J.
中科院分区:
生物学1区
文献类型:
--
作者:
Hosfelt, Jordan;Richards, Aweon;Zheng, Meng;Adura, Carolina;Nelson, Brock;Yang, Amy;Fay, Allison;Resager, William;Ueberheide, Beatrix;Glickman, J. Fraser;Lupoli, Tania J.

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DnaK is the bacterial homolog of Hsp70, an ATP-dependent chaperone that assists cofactor proteins to catalyze nascent protein folding and salvage misfolded proteins. In the pathogen Mycobacterium tuberculosis, the causative agent of tuberculosis (TB), DnaK and its cofactors are proposed antimycobacterial targets, yet few small molecule inhibitors or probes exist for these classes of proteins. Here, we describe the repurposing of a drug called telaprevir that is able to allosterically inhibit the ATPase activity of DnaK, and prevents chaperone function by mimicking peptide substrates. In mycobacterial cells, telaprevir disrupts DnaK/cofactor-mediated cellular proteostasis, resulting in enhanced efficacy of aminoglycoside antibiotics and reduced resistance to the frontline TB drug rifampin. Hence, this work contributes to a small but growing collection of protein chaperone inhibitors, and demonstrates that these molecules disrupt bacterial mechanisms of survival in the presence of different antibiotic classes. Hosfelt and Richards et al. discover that an FDA-approved antiviral drug called telaprevir inhibits chaperone activation by cofactors in bacteria, and in doing so can increase bacterial sensitivity to antibiotics and reduce the likelihood of drug resistance.
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