5cca

Crystal structure of Mtb toxin

spinqualitylabelsall models 5cca, resolution 3.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5cca is a 2 chain structure with sequence from Mycobacterium tuberculosis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3.2Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function MAZF3_MYCTU Toxic component of a type II toxin-antitoxin (TA) module. Acts as an mRNA and 23S rRNA interferase, cleaving predominantly after the first 2 Us in the sequence 5'-UUCCU-3'; in 23S rRNA only cleaves once in the ribosomal A site in dissociated but not intact ribosomes. Cleavage of 23S rRNA inhibits protein translation; the 23S rRNA region cleaved is involved in tRNA-binding in the A site, 30S and 50S subunit interaction and ribosome recycling factor association (PubMed:23650345). Upon expression in E.coli and M.smegmatis inhibits cell growth and colony formation. It dramatically increases persister cell formation in M.smegmatis upon challenge with gentamicin or kanamycin. Overexpression leads to bacteriostasis rather than bacteriocide. Its toxic effect is neutralized by coexpression with cognate antitoxin MazE3. See Also Endonuclease 3D structures

Proteopedia Page Contributors and Editors (what is this?)

OCA