Abstract
As in most nitrogen fixing organisms, the expression of genes encoding the molybdenum nitrogenase in Rhodobacter capsulatus is dependent on the transcriptional activator protein NifA. However, in the phototrophic purple bacterium R. capsulatus this transcriptional activator is encoded by two distinct genes: nifAI and nifAII. DNA sequence analysis demonstrated that nifAI and nifAII code for proteins that differ only in their 19 and 22 N-terminal amino acids, respectively. It is surprising that nifAI and nifAII differ only in their 5’ends, whereas the remaining parts of the coding regions as well as the intergenetic regions between nifAI/nifBI and nifAII/nifBII are identical in both copies.
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© 1998 Springer Science+Business Media Dordrecht
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Klipp, W., Paschen, A. (1998). Duplication of a Transcriptional Regulator as a Mechanism for Genetic Control: NifAI and NifAII from Rhodobacter capsulatus Differ in Their Susceptibility to Ammonium Control. In: Elmerich, C., Kondorosi, A., Newton, W.E. (eds) Biological Nitrogen Fixation for the 21st Century. Current Plant Science and Biotechnology in Agriculture, vol 31. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5159-7_55
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DOI: https://doi.org/10.1007/978-94-011-5159-7_55
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6169-8
Online ISBN: 978-94-011-5159-7
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