5j8a | pdb_00005j8a

Structure of the E coli 70S ribosome with the U1052G mutation in 16S rRNA bound to tigecycline

spinqualitylabelsall models 5j8a, resolution 3.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5j8a is a 19 chain structure with sequence from Escherichia coli and Escherichia coli K-12. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3.1Å Ligands: 1MG, 1PE, 2MA, 2MG, 3TD, 4D4, 4OC, 5MC, 5MU, 6MZ, 7MG, ACY, D2T, EDO, GUN, H2U, MA6, MEQ, MG, MPD, OMC, OMG, OMU, PEG, PG4, PGE, PSU, PUT, SPD, T1C, TRS, UR3, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RS3_ECOLI Binds the lower part of the 30S subunit head. Binds mRNA in the 70S ribosome, positioning it for translation (By similarity). Plays a role in mRNA unwinding by the ribosome, possibly by forming part of a processivity clamp. Publication Abstract from PubMed Mutations conferring resistance to translation inhibitors often alter the structure of rRNA. Reduced susceptibility to distinct structural antibiotic classes may, therefore, emerge when a common ribosomal binding site is perturbed, which significantly reduces the clinical utility of these agents. The translation inhibitors negamycin and tetracycline interfere with tRNA binding to the aminoacyl-tRNA site on the small 30S ribosomal subunit. However, two negamycin resistance mutations display unexpected differential antibiotic susceptibility profiles. Mutant U1060A in 16S Escherichia coli rRNA is resistant to both antibiotics, whereas mutant U1052G is simultaneously resistant to negamycin and hypersusceptible to tetracycline. Using a combination of microbiological, biochemical, single-molecule fluorescence transfer experiments, and X-ray crystallography, we define the specific structural defects in the U1052G mutant 70S E. coli ribosome that explain its divergent negamycin and tetracycline susceptibility profiles. Unexpectedly, the U1052G mutant ribosome possesses a second tetracycline binding site that correlates with its hypersusceptibility. The creation of a previously unidentified antibiotic binding site raises the prospect of identifying similar phenomena in antibiotic-resistant pathogens in the future. Resistance mutations generate divergent antibiotic susceptibility profiles against translation inhibitors.,Cocozaki AI, Altman RB, Huang J, Buurman ET, Kazmirski SL, Doig P, Prince DB, Blanchard SC, Cate JH, Ferguson AD Proc Natl Acad Sci U S A. 2016 Jul 19;113(29):8188-93. doi:, 10.1073/pnas.1605127113. Epub 2016 Jul 5. PMID:27382179 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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