title: Identification of operator sites within the upstream region of the putative mce2R gene from mycobacteria.
abstract: Mycobacterium tuberculosis harbors four mce operons. Among them, mce2 operon is preceded by a FadR-like regulator mce2R (Rv0586). Here, we report the operator sites of the mce2R and its orthologs in other sequenced mycobacteria and non-mycobacterial species Nocardia farciana. All the identified DNA motifs illustrate the FadR subfamily specific nucleotide preference. Moreover, these motifs from the upstream region share sequence conservation, which is in agreement with the similarity of their DNA binding domain. Using electrophoretic mobility shift assay, we demonstrate that the predicted DNA motifs specifically interact with the recombinant Mce2R-Rv0586. Our present study has implications in the understanding of cis-regulatory elements and the auto-regulatory nature of the FadR subfamily of regulators.
authors.affiliation: Computational and Functional Genomics Group, Sun Centre of Excellence in Medical Bioinformatics, Centre for DNA Fingerprinting and Diagnostics, EMBnet India Node, Hyderabad 500 076, India.
authors.forename: Vaibhav
authors.initials: V
authors.lastname: Vindal
authors.forename: Enjapoori
authors.initials: E
authors.lastname: Ashwantha Kumar
authors.forename: Akash
authors.initials: A
authors.lastname: Ranjan
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D001483:Base Sequence; D001665:Binding Sites; D017124:Conserved Sequence; D008969:Molecular Sequence Data; D009169:Mycobacterium tuberculosis / Q000235:genetics*; D009875:Operator Regions, Genetic; D016415:Sequence Alignment; D014157:Transcription Factors / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism
chemical_list: D001426:Bacterial Proteins; D014157:Transcription Factors