Download MendeleyThe Complete Structure of the Mycobacterium smegmatis 70S Ribosome.
Hentschel, J., Burnside, C., Mignot, I., Leibundgut, M., Boehringer, D., Ban, N.(2017) Cell Rep 20: 149-160
- PubMed: 28683309
- DOI: https://doi.org/10.1016/j.celrep.2017.06.029
- Primary Citation of Related Structures:
5O5J, 5O60, 5O61 - PubMed Abstract:
The ribosome carries out the synthesis of proteins in every living cell. It consequently represents a frontline target in anti-microbial therapy. Tuberculosis ranks among the leading causes of death worldwide, due in large part to the combination of difficult-to-treat latency and antibiotic resistance. Here, we present the 3.3-Å cryo-EM structure of the 70S ribosome of Mycobacterium smegmatis, a close relative to the human pathogen Mycobacterium tuberculosis. The structure reveals two additional ribosomal proteins and localizes them to the vicinity of drug-target sites in both the catalytic center and the decoding site of the ribosome. Furthermore, we visualized actinobacterium-specific rRNA and protein expansions that extensively remodel the ribosomal surface with implications for polysome organization. Our results provide a foundation for understanding the idiosyncrasies of mycobacterial translation and reveal atomic details of the structure that will facilitate the design of anti-tubercular therapeutics.
Organizational Affiliation:
Institute of Molecular Biology and Biophysics, Eidgenössische Technische Hochschule (ETH) Zürich, Otto-Stern-Weg 5, Zürich 8093, Switzerland.
