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Gene Review:

ARR7 - two-component response regulator ARR7

Arabidopsis thaliana

Synonyms: F14D16.20, F14D16_20, response regulator 7

Lee, D.J. et al., Taniguchi, M. et al.

Taniguchi, Kiba, Sakakibara, Ueguchi, Mizuno, Sugiyama,

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High impact information on ARR7

We examined cytokinin and nitrate responsiveness in gene expression of five distinct response regulator homologs (ARR3-ARR7) in the leaves of nitrogen-starved Arabidopsis plants [1].
In particular, the induction of all A-type ARRs except for ARR22, and AHK(ARABIDOPSIS HISTIDINE KINASE)1 and AHK4 was suppressed by ARR7 [2].
To get insights into the molecular function of A-type ARR in cytokinin response, we sought to find the components that function downstream of A-type ARR protein by investigating the effects of ARR7 overexpression on cytokinin-regulated gene expression with the Affymetrix full genome array [2].
Cytokinin-induced expression of most of 12 expansin genes were repressed by ARR7, indicating potential involvement of ARR7 in cell expansion and plant development [2].
Up-regulation of five cytokinin oxidase genes by cytokinins was negatively affected by ARR7 [2].

Associations of ARR7 with chemical compounds

The hierarchical clustering analysis of our GeneChip data showed that ARR7 overexpression had distinctively repressive impacts on various groups of the cytokinin-regulated genes [2].

References

Expression of Arabidopsis response regulator homologs is induced by cytokinins and nitrate. Taniguchi, M., Kiba, T., Sakakibara, H., Ueguchi, C., Mizuno, T., Sugiyama, T. FEBS Lett. (1998) [Pubmed]
Genome-wide expression profiling of ARABIDOPSIS RESPONSE REGULATOR 7(ARR7) overexpression in cytokinin response. Lee, D.J., Park, J.Y., Ku, S.J., Ha, Y.M., Kim, S., Kim, M.D., Oh, M.H., Kim, J. Mol. Genet. Genomics (2007) [Pubmed]

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