7nbu

Structure of the HigB1 toxin mutant K95A from Mycobacterium tuberculosis (Rv1955) and its target, the cspA mRNA, on the E. coli Ribosome.

spinqualitylabelsall models 7nbu, resolution 3.11Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7nbu is a 10 chain structure with sequence from Escherichia coli K-12 and Mycobacterium tuberculosis H37Rv. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 3.11Å Ligands: 1MG, 2MA, 2MG, 3TD, 4D4, 4OC, 4SU, 5MC, 5MU, 6MZ, D2T, FME, G7M, H2U, IAS, MA6, MEQ, MG, MS6, OMC, OMG, OMU, PSU, UR3, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RS10_ECOLI Involved in the binding of tRNA to the ribosomes.[HAMAP-Rule:MF_00508] Publication Abstract from PubMed Toxins of toxin-antitoxin systems use diverse mechanisms to control bacterial growth. Here, we focus on the deleterious toxin of the atypical tripartite toxin-antitoxin-chaperone (TAC) system of Mycobacterium tuberculosis, whose inhibition requires the concerted action of the antitoxin and its dedicated SecB-like chaperone. We show that the TAC toxin is a bona fide ribonuclease and identify exact cleavage sites in mRNA targets on a transcriptome-wide scale in vivo. mRNA cleavage by the toxin occurs after the second nucleotide of the ribosomal A-site codon during translation, with a strong preference for CCA codons in vivo. Finally, we report the cryo-EM structure of the ribosome-bound TAC toxin in the presence of native M. tuberculosis cspA mRNA, revealing the specific mechanism by which the TAC toxin interacts with the ribosome and the tRNA in the P-site to cleave its mRNA target. Substrate recognition and cryo-EM structure of the ribosome-bound TAC toxin of Mycobacterium tuberculosis.,Mansour M, Giudice E, Xu X, Akarsu H, Bordes P, Guillet V, Bigot DJ, Slama N, D'urso G, Chat S, Redder P, Falquet L, Mourey L, Gillet R, Genevaux P Nat Commun. 2022 May 12;13(1):2641. doi: 10.1038/s41467-022-30373-w. PMID:35552387 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ribosome 3D structures

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