7bvc Citations

Structures of cell wall arabinosyltransferases with the anti-tuberculosis drug ethambutol.

Abstract

The arabinosyltransferases EmbA, EmbB, and EmbC are involved in Mycobacterium tuberculosis cell wall synthesis and are recognized as targets for the anti-tuberculosis drug ethambutol. In this study, we determined cryo-electron microscopy and x-ray crystal structures of mycobacterial EmbA-EmbB and EmbC-EmbC complexes in the presence of their glycosyl donor and acceptor substrates and with ethambutol. These structures show how the donor and acceptor substrates bind in the active site and how ethambutol inhibits arabinosyltransferases by binding to the same site as both substrates in EmbB and EmbC. Most drug-resistant mutations are located near the ethambutol binding site. Collectively, our work provides a structural basis for understanding the biochemical function and inhibition of arabinosyltransferases and the development of new anti-tuberculosis agents.

Reviews - 7bvc mentioned but not cited (2)

  1. Antibiotics and resistance: the two-sided coin of the mycobacterial cell wall. Batt SM, Burke CE, Moorey AR, Besra GS. Cell Surf 6 100044 (2020)
  2. Recent Insights into the Structure and Function of Mycobacterial Membrane Proteins Facilitated by Cryo-EM. Bendre AD, Peters PJ, Kumar J. J Membr Biol 254 321-341 (2021)


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