title: Comparative analysis of iron regulated genes in mycobacteria.
abstract: Iron dependent regulator, IdeR, regulates the expression of genes in response to intracellular iron levels in M. tuberculosis. Orthologs of IdeR are present in all the sequenced genomes of mycobacteria. We have used a computational approach to identify conserved IdeR regulated genes across the mycobacteria and the genes that are specific to each of the mycobacteria. Novel iron regulated genes that code for a predicted 4-hydroxy benzoyl coA hydrolase (Rv1847) and a protease dependent antibiotic regulatory system (Rv1846c, Rv0185c) are conserved across the mycobacteria. Although Mycobacterium natural-resistance-associated macrophage protein (Mramp) is present in all mycobacteria, it is, as predicted, an iron-regulated gene in only one species, M. avium subsp. paratuberculosis. We also observed an additional iron-regulated exochelin biosynthetic operon, which is present only in non-pathogenic Mycobacterium, M. smegmatis.
authors.affiliation: Computational and Functional Genomics Group, Sun Centre of Excellence in Medical Bioinformatics, Centre for DNA Fingerprinting and Diagnostics, EMBnet India Node, Hyderabad 500076, India.
authors.forename: Sailu
authors.initials: S
authors.lastname: Yellaboina
authors.forename: Sarita
authors.initials: S
authors.lastname: Ranjan
authors.forename: Vaibhav
authors.initials: V
authors.lastname: Vindal
authors.forename: Akash
authors.initials: A
authors.lastname: Ranjan
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D001665:Binding Sites; D019295:Computational Biology; D017124:Conserved Sequence; D015964:Gene Expression Regulation, Bacterial / Q000187:drug effects; D007501:Iron / Q000494:pharmacology*; D008969:Molecular Sequence Data; D009161:Mycobacterium / Q000737:chemistry / Q000187:drug effects* / Q000235:genetics* / Q000378:metabolism; D009876:Operon / Q000235:genetics; D011485:Protein Binding; D012097:Repressor Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid
chemical_list: D001426:Bacterial Proteins; D012097:Repressor Proteins; D007501:Iron