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Mycobacterium tuberculosis Rho Is an NTPase with Distinct Kinetic Properties and a Novel RNA-Binding Subdomain

Mitra, Anirban and Misquitta, Rachel and Nagaraja, Valakunja (2014) Mycobacterium tuberculosis Rho Is an NTPase with Distinct Kinetic Properties and a Novel RNA-Binding Subdomain. In: PLOS ONE, 9 (9).

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Official URL: http://dx.doi.org/ 10.1371/journal.pone.0107474

Abstract

Two mechanisms - factor independent and dependent termination - ensure the completion of RNA synthesis in eubacteria. Factor-dependent mechanism relies on the Rho protein to terminate transcription by interacting with RNA polymerase. Although well studied in Escherichia coli, the properties of the Rho homologs from most bacteria are not known. The rho gene is unusually large in genus Mycobacterium and other members of actinobacteria, having,150 additional residues towards the amino terminal end. We describe the distinct properties of Rho from Mycobacterium tuberculosis. It is an NTPase with a preference for purine nucleoside triphosphates with kinetic properties different from E. coli homolog and an ability to use various RNA substrates. The N-terminal subdomain of MtbRho can bind to RNA by itself, and appears to contribute to the interaction of the termination factor with RNAs. Furthermore, the interaction with RNA induces changes in conformation and oligomerization of MtbRho.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the Author
Department/Centre: Division of Biological Sciences > Microbiology & Cell Biology
Depositing User: Id for Latest eprints
Date Deposited: 08 Nov 2014 05:06
Last Modified: 08 Nov 2014 05:06
URI: http://eprints.iisc.ac.in/id/eprint/50161

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