| Literature DB >> 16579974 |
Richa Gupta1, Arnab China, Ujjini H Manjunatha, N M Ponnanna, Valakunja Nagaraja.
Abstract
We report here the existence of a complex between RNA polymerase (RNAP) and DNA gyrase in Mycobacterium smegmatis. The interaction between the two enzymes was detected during our attempts to purify DNA gyrase from M. smegmatis. RNAP subunits co-eluted along with DNA gyrase in two different affinity chromatography column procedures employed to purify the latter enzyme. A complex containing both the enzymes was isolated through gel filtration chromatography and sucrose density gradient centrifugation of the cell free extracts. The complex exhibited both DNA supercoiling and transcription activities. Reduction in the transcription activity of the complex in the presence of DNA gyrase inhibitor indicates a role for DNA gyrase in stimulating transcription.Entities:
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Year: 2006 PMID： 16579974 DOI： 10.1016/j.bbrc.2006.02.195
Source DB: PubMed Journal: Biochem Biophys Res Commun ISSN： 0006-291X Impact factor: 3.575