Abstract:The canonical function of a bacterial sigma factor is to determine the gene specificity of the RNA polymerase (RNAP). In several diverse bacterial species, the sigma 54 factor uniquely confers distinct functional and regulatory properties on the RNAP. A hallmark feature of the sigma 54-RNAP is the obligatory requirement for an activator ATPase to allow transcription initiation. The genes that rely upon sigma 54 for their transcription have a wide range of different functions suggesting that the repertoire of … Show more
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