8a57

Cryo-EM structure of HflXr bound to the Listeria monocytogenes 50S ribosomal subunit.

spinqualitylabelsall models 8a57, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8a57 is a 10 chain structure with sequence from Listeria monocytogenes EGD-e. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 2.3Å Ligands: GNP, K, MG, PUT, SPD, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RL28_LISMO Publication Abstract from PubMed HflX is a ubiquitous bacterial GTPase that splits and recycles stressed ribosomes. In addition to HflX, Listeria monocytogenes contains a second HflX homolog, HflXr. Unlike HflX, HflXr confers resistance to macrolide and lincosamide antibiotics by an experimentally unexplored mechanism. Here, we have determined cryo-EM structures of L. monocytogenes HflXr-50S and HflX-50S complexes as well as L. monocytogenes 70S ribosomes in the presence and absence of the lincosamide lincomycin. While the overall geometry of HflXr on the 50S subunit is similar to that of HflX, a loop within the N-terminal domain of HflXr, which is two amino acids longer than in HflX, reaches deeper into the peptidyltransferase center. Moreover, unlike HflX, the binding of HflXr induces conformational changes within adjacent rRNA nucleotides that would be incompatible with drug binding. These findings suggest that HflXr confers resistance using an allosteric ribosome protection mechanism, rather than by simply splitting and recycling antibiotic-stalled ribosomes. Structural basis for HflXr-mediated antibiotic resistance in Listeria monocytogenes.,Koller TO, Turnbull KJ, Vaitkevicius K, Crowe-McAuliffe C, Roghanian M, Bulvas O, Nakamoto JA, Kurata T, Julius C, Atkinson GC, Johansson J, Hauryliuk V, Wilson DN Nucleic Acids Res. 2022 Oct 28;50(19):11285-11300. doi: 10.1093/nar/gkac934. PMID:36300626 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also GTP-binding protein 3D structures

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