5hjz

Structural highlights

Function

[MAZF9_MYCTU] Toxic component of a type II toxin-antitoxin (TA) module. Upon expression in E.coli and M.smegmatis inhibits cell growth and colony formation. Its toxic effect is neutralized by coexpression with cognate antitoxin MazE9. Acts as an mRNA interferase, specifically cleaving between U and C in UAC sequences. May cleave its cognate antitoxin's gene (PubMed:25608501). In E.coli expression with non-cognate antitoxins VapB27 and VapB40 partially neutralizes the toxin.^{[1] [2] [3] [4] [5]}

References

1. ↑ Zhu L, Zhang Y, Teh JS, Zhang J, Connell N, Rubin H, Inouye M. Characterization of mRNA interferases from Mycobacterium tuberculosis. J Biol Chem. 2006 Jul 7;281(27):18638-43. Epub 2006 Apr 12. PMID:16611633 doi:http://dx.doi.org/10.1074/jbc.M512693200
2. ↑ Gupta A. Killing activity and rescue function of genome-wide toxin-antitoxin loci of Mycobacterium tuberculosis. FEMS Microbiol Lett. 2009 Jan;290(1):45-53. doi:, 10.1111/j.1574-6968.2008.01400.x. Epub 2008 Nov 10. PMID:19016878 doi:http://dx.doi.org/10.1111/j.1574-6968.2008.01400.x
3. ↑ Ramage HR, Connolly LE, Cox JS. Comprehensive functional analysis of Mycobacterium tuberculosis toxin-antitoxin systems: implications for pathogenesis, stress responses, and evolution. PLoS Genet. 2009 Dec;5(12):e1000767. doi: 10.1371/journal.pgen.1000767. Epub 2009, Dec 11. PMID:20011113 doi:http://dx.doi.org/10.1371/journal.pgen.1000767
4. ↑ Zhu L, Sharp JD, Kobayashi H, Woychik NA, Inouye M. Noncognate Mycobacterium tuberculosis toxin-antitoxins can physically and functionally interact. J Biol Chem. 2010 Dec 17;285(51):39732-8. doi: 10.1074/jbc.M110.163105. Epub 2010, Sep 27. PMID:20876537 doi:http://dx.doi.org/10.1074/jbc.M110.163105
5. ↑ Tiwari P, Arora G, Singh M, Kidwai S, Narayan OP, Singh R. MazF ribonucleases promote Mycobacterium tuberculosis drug tolerance and virulence in guinea pigs. Nat Commun. 2015 Jan 22;6:6059. doi: 10.1038/ncomms7059. PMID:25608501 doi:http://dx.doi.org/10.1038/ncomms7059