Cryo-EM structures of the 80S ribosomes from human parasites Trichomonas vaginalis and Toxoplasma gondiiLi, Z., Guo, Q., Zheng, L., Ji, Y., Xie, Y.T., Lai, D.H., Lun, Z.R., Suo, X., Gao, N.
(2017) Cell Res. 27: 1275-1288
- PubMed: 28809395
- DOI: 10.1038/cr.2017.104
- Primary Citation of Related Structures:
- PubMed Abstract:
As an indispensable molecular machine universal in all living organisms, the ribosome has been selected by evolution to be the natural target of many antibiotics and small-molecule inhibitors. High-resolution structures of pathogen ribosomes are cruc ...
As an indispensable molecular machine universal in all living organisms, the ribosome has been selected by evolution to be the natural target of many antibiotics and small-molecule inhibitors. High-resolution structures of pathogen ribosomes are crucial for understanding the general and unique aspects of translation control in disease-causing microbes. With cryo-electron microscopy technique, we have determined structures of the cytosolic ribosomes from two human parasites, Trichomonas vaginalis and Toxoplasma gondii, at resolution of 3.2-3.4 Å. Although the ribosomal proteins from both pathogens are typical members of eukaryotic families, with a co-evolution pattern between certain species-specific insertions/extensions and neighboring ribosomal RNA (rRNA) expansion segments, the sizes of their rRNAs are sharply different. Very interestingly, rRNAs of T. vaginalis are in size comparable to prokaryotic counterparts, with nearly all the eukaryote-specific rRNA expansion segments missing. These structures facilitate the dissection of evolution path for ribosomal proteins and RNAs, and may aid in design of novel translation inhibitors.
State Key Laboratory of Membrane Biology, Peking-Tsinghua Joint Center for Life Sciences, School of Life Sciences, Peking University, Beijing 100871, China.,Tsinghua-Peking Joint Center for Life Sciences, Tsinghua University, Beijing 100084, China.,Center for Parasitic Organisms, State Key Laboratory of Biocontrol, Key Laboratory of Tropical Disease Control (Sun Yat-Sen University), Ministry of Education, School of Life Sciences, Sun Yat-Sen University, Guangzhou, Guangdong 510275, China.,State Key Laboratory of Agrobiotechnology &National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.,State Key Laboratory of Membrane Biology, Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.,Anhui Provincial Laboratory of Pathogen Biology, Anhui Key Laboratory of Zoonoses, Department of Microbiology and Parasitology, Anhui Medical University, Hefei, Anhui 230022, China.