Abstract
Regulation of nod gene expression in Bradyrhizobium japonicum involves interplay between members of three global regulatory families. Similar to other rhizobia, the LysR-type regulator NodD1 induces nod gene transcription in the presence of plant-produced isoflavonoids. B. japonicum appears to be unique in that it also possesses a second isoflavonoid recognition system. This system, composed of NodV and NodW, members of the two-component regulatory family, also mediates nod gene induction by isoflavonoids. In contrast, the MerR-type regulator NolA appears to indirectly repress nod gene expression. Further complexity is added by the fact that these regulatory proteins can exist in different forms. For example, three forms of NolA are translated from one nolA gene, while NodW can exist in either phosphorylated and unphosphorylated forms.
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© 1999 Springer Science+Business Media New York
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Loh, J., Yuen, J.PY., Stacey, M.G., Stacey, G. (1999). Unique Aspects of Nod Gene Expression in Bradyrhizobium Japonicum . In: Martĺnez, E., Hernández, G. (eds) Highlights of Nitrogen Fixation Research. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4795-2_22
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DOI: https://doi.org/10.1007/978-1-4615-4795-2_22
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