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Gene Review

ROP10  -  Rac-like GTP-binding protein ARAC8

Arabidopsis thaliana

Synonyms: ARAC8, ATRAC8, ATROP10, Arabidopsis RAC-like 8, RHO-RELATED PROTEIN FROM PLANTS 10, ...
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High impact information on ARAC8/ATROP10/ROP10

  • A null rop10 mutant exhibits enhanced responses to ABA in seed germination, root elongation, and stomatal closure assays and in the induction of expression of the transcription factor MYB2, but it shows wild-type levels of ABA and normal responses to other hormones [1].
  • Furthermore, ABA specifically downregulates ROP10 transcription in root tips [1].
  • ROP10 is localized to the plasma membrane (PM), and PM localization is crucial for its function [1].
  • Plasma membrane-associated ROP10 small GTPase is a specific negative regulator of abscisic acid responses in Arabidopsis [1].
  • Our results suggest that ROP10 negatively regulates ABA responses by specifically and differentially modulating the ABA sensitivity of a subset of genes including protein kinases and zinc-finger family proteins [2].


  1. Plasma membrane-associated ROP10 small GTPase is a specific negative regulator of abscisic acid responses in Arabidopsis. Zheng, Z.L., Nafisi, M., Tam, A., Li, H., Crowell, D.N., Chary, S.N., Schroeder, J.I., Shen, J., Yang, Z. Plant Cell (2002) [Pubmed]
  2. Transcriptome analysis reveals specific modulation of abscisic acid signaling by ROP10 small GTPase in Arabidopsis. Xin, Z., Zhao, Y., Zheng, Z.L. Plant Physiol. (2005) [Pubmed]
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