9dp7 | pdb_00009dp7

Hypopseudouridylated yeast 80S bound with Taura syndrome virus (TSV) internal ribosome entry site (IRES) and hygromycin B, Class II

spinqualitylabelsall models 9dp7, resolution 2.38Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 9dp7 is a 10 chain structure with sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 2.38Å Ligands: 1MA, 4AC, 5MC, A2M, G7M, HIC, HYG, MA6, MG, OMC, OMG, OMU, UR3, XSX, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Eukaryotic ribosomes are enriched with pseudouridine, particularly at the functional centers targeted by antibiotics. Here, we investigated the roles of pseudouridine in aminoglycoside-mediated translation inhibition by comparing the structural and functional properties of the yeast wild-type and the pseudouridine-free ribosomes. We showed that the pseudouridine-free ribosomes have decreased thermostability and high sensitivity to aminoglycosides. When presented with a model internal ribosomal entry site RNA, elongation factor eEF2, GTP (guanosine triphosphate), and sordarin, hygromycin B preferentially binds to the pseudouridine-free ribosomes during initiation by blocking eEF2 binding, stalling ribosomes in a nonrotated conformation. The structures captured hygromycin B bound at the intersubunit bridge B2a enriched with pseudouridine and a deformed codon-anticodon duplex, revealing a functional link between pseudouridine and aminoglycoside inhibition. Our results suggest that pseudouridine enhances both thermostability and conformational fitness of the ribosomes, thereby influencing their susceptibility to aminoglycosides. Structural basis for hygromycin B inhibition of yeast pseudouridine-deficient ribosomes.,Zhao Y, Xu C, Chen X, Jin H, Li H Sci Adv. 2025 Apr 4;11(14):eadu0151. doi: 10.1126/sciadv.adu0151. Epub 2025 Apr , 2. PMID:40173234 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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