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The seven WhiB proteins of Mycobacterium tuberculosis (M.tb) are widely believed to be redox-sensing transcription factors due to their binding of iron-sulfur clusters and similarities to DNA binding proteins. Here, we explored the nature of this hypothesized relationship. We exposed M.tb to physiologic conditions such as gradual hypoxia, nitric oxide (NO), cyclic AMP and in vivo conditions, and measured transcription of the whiB genes. We found whiB3 to be induced both by hypoxia and NO, whiB7 to be induced in macrophage-like cells, and whiB4 to be induced in mouse lung. Cyclic AMP induced whiB1,-2, -4, -6 and -7. Our data indicate that the M.tb whiB genes are induced independently by various stimuli which may add versatility to their suggested redox-sensing properties.
Pubmed ID: 22829866
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GenoList is a resource for microbial genomes. It provides links to databases that give information on specific microbes. A link to the Genolist itself also incorporates many microbial genomes and search and analysis tools. Of the links provided on the GenoList homepage, species included are: Bacillus subtilis Escherichia coli Mycobacterium tuberculosis Mycobacterium leprae Mycobacterium bovis Mycobacterium ulcerans Listeria monocytogenes Legionella pneumophila Helicobacter pylori Mycoplasma pulmonis Synechocystis Anabaena Staphylococcus aureus Streptococcus pneumoniae Streptococcus agalactiae Photorhabdus luminescens Candida albicans Bacillus subtilis Escherichia coli Mycobacterium tuberculosis Mycobacterium leprae Mycobacterium bovis Mycobacterium ulcerans Listeria monocytogenes Legionella pneumophila Helicobacter pylori Mycoplasma pulmonis Synechocystis Anabaena Staphylococcus aureus Streptococcus pneumoniae Streptococcus agalactiae Photorhabdus luminescens Candida albicans
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View all literature mentionsMus musculus with name C3HeB/FeJ from IMSR.
View all literature mentionsCell line J774 is a Cancer cell line with a species of origin Mus musculus (Mouse)
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