Adaptor proteins GIR1 and GIR2. I. Interaction with the repressor GLABRA2 and regulation of root hair development

Biochemical and Biophysical Research Communications
Renhong Wu, Vitaly Citovsky

Abstract

Plants use specialized root outgrowths, termed root hairs, to enhance acquisition of nutrients and water, help secure anchorage, and facilitate interactions with soil microbiome. One of the major regulators of this process is GLABRA2 (GL2), a transcriptional repressor of root hair differentiation. However, regulation of the GL2-function is relatively well characterized, it remains completely unknown whether GL2 itself functions in complex with other transcriptional regulators. We identified GIR1 and GIR2, a plant-specific two-member family of closely related proteins that interact with GL2. Loss-of-function mutants of GIR1 and GIR2 enhanced development of root hair whereas gain-of-function mutants repressed it. Thus, GIR1 and GIR2 might function as adaptor proteins that associate with GL2 and participate in control of root hair formation.

References

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May 14, 2004·Plant Physiology·Guo-Wei TianVitaly Citovsky
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Citations

May 21, 2017·Biochemical and Biophysical Research Communications·Renhong Wu, Vitaly Citovsky
Jan 29, 2020·Journal of Experimental Botany·Min-Liang WuHong Cui
Mar 4, 2020·International Journal of Molecular Sciences·Xueying LiuIain Wilson
Oct 12, 2019·International Journal of Molecular Sciences·Siyu Chen, Shucai Wang
Apr 4, 2019·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Xiaoxu FengGuoli Song
Oct 17, 2020·Molecular Plant·Shulin LiuZhixi Tian

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