Primary Citation of Related Structures: 9G1Z, 9G30, 9G6J
PubMed Abstract:
Nonsense mutations are associated with numerous and diverse pathologies, yet effective treatment strategies remain elusive. A promising approach to combat these conditions involves the use of aminoglycosides, particularly in combination with stop-codon read-through enhancers, for developing drugs that can rescue the production of full-length proteins. Using X-ray crystallography and single-particle cryo-EM, we obtained structures of the eukaryotic ribosome in complexes with several aminoglycosides (geneticin G418, paromomycin, and hygromycin B) and the antimalarial drug mefloquine (MFQ), which has also been identified as a read-through enhancer. Our study reveals a binding site of MFQ, which holds significant promise for the development of therapies targeting premature termination codon-related genetic and oncological diseases. The results underscore the crucial role of the bridge B7b/c in mediating the effects of MFQ on subunit rotation dynamics. Through a comprehensive analysis of the interactions between the drugs and the eukaryotic ribosome, we propose a unifying hypothesis for read-through enhancement by small molecules, highlighting the role of decoding center rearrangements and intersubunit rotation dynamics.
Organizational Affiliation:
Department of Integrated Structural Biology, Institute of Genetics and Molecular and Cellular Biology, University of Strasbourg, Illkirch 67400, France.
Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen 9747 AG, the Netherlands.
Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119234, Russia.
Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow 119234, Russia.
Laboratory of Structural Biology, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan 420008, Russia.
Moscow Centre for Advanced Studies, Moscow 123592, Russia.
Joint Institute for Nuclear Research, Dubna 141980, Russia.
Download Mendeley
