8vtx

Crystal structure of the A2058-N6-dimethylated Thermus thermophilus 70S ribosome in complex with macrolone MCX-128, mRNA, aminoacylated A-site Phe-tRNAphe, aminoacylated P-site fMet-tRNAmet, and deacylated E-site tRNAphe at 2.40A resolutionCrystal structure of the A2058-N6-dimethylated Thermus thermophilus 70S ribosome in complex with macrolone MCX-128, mRNA, aminoacylated A-site Phe-tRNAphe, aminoacylated P-site fMet-tRNAmet, and deacylated E-site tRNAphe at 2.40A resolution

Structural highlights 8vtx is a 20 chain structure with sequence from Escherichia coli, Escherichia virus T4 and Thermus thermophilus HB8. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.4Å Ligands: , , , , , , , , , , , , , , , , , , , , , , , Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RS4_THET8 One of the primary rRNA binding proteins, it binds directly to 16S rRNA where it helps nucleate assembly of the body and platform of the 30S subunit. Binds mRNA in the 70S ribosome, positioning it for translation.[HAMAP-Rule:MF_01306_B] Publication Abstract from PubMed Growing resistance toward ribosome-targeting macrolide antibiotics has limited their clinical utility and urged the search for superior compounds. Macrolones are synthetic macrolide derivatives with a quinolone side chain, structurally similar to DNA topoisomerase-targeting fluoroquinolones. While macrolones show enhanced activity, their modes of action have remained unknown. Here, we present the first structures of ribosome-bound macrolones, showing that the macrolide part occupies the macrolide-binding site in the ribosomal exit tunnel, whereas the quinolone moiety establishes new interactions with the tunnel. Macrolones efficiently inhibit both the ribosome and DNA topoisomerase in vitro. However, in the cell, they target either the ribosome or DNA gyrase or concurrently both of them. In contrast to macrolide or fluoroquinolone antibiotics alone, dual-targeting macrolones are less prone to select resistant bacteria carrying target-site mutations or to activate inducible macrolide resistance genes. Furthermore, because some macrolones engage Erm-modified ribosomes, they retain activity even against strains with constitutive erm resistance genes. Macrolones target bacterial ribosomes and DNA gyrase and can evade resistance mechanisms.,Aleksandrova EV, Ma CX, Klepacki D, Alizadeh F, Vazquez-Laslop N, Liang JH, Polikanov YS, Mankin AS Nat Chem Biol. 2024 Jul 22. doi: 10.1038/s41589-024-01685-3. PMID:39039256 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

spinqualitylabelsall models 8vtx, resolution 2.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image