Cell Surface ABP1-TMK Auxin-Sensing Complex Activates ROP GTPase Signaling

Author:

Xu Tongda123,Dai Ning4,Chen Jisheng1,Nagawa Shingo13,Cao Min2,Li Hongjiang156,Zhou Zimin2,Chen Xu56,De Rycke Riet5,Rakusová Hana56,Wang Wuyi37,Jones Alan M.8,Friml Jiří569,Patterson Sara E.7,Bleecker Anthony B.4,Yang Zhenbiao1310

Affiliation:

1. Center for Plant Cell Biology, Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, USA.

2. Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, 117604 Singapore.

3. Shanghai Center for Plant Stress Biology, Shanghai Institutes for Biological Sciences, The Chinese Academy of Sciences, Shanghai 200032, China.

4. Department of Botany, University of Wisconsin, Madison, WI 53706, USA.

5. Department of Plant Systems Biology, VIB and Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium.

6. Bertalanffy Foundation Building, Institute of Science and Technology Austria, Am Campus 1, 3400 Klosterneuburg, Austria.

7. Department of Horticulture, University of Wisconsin, Madison, WI 53706, USA.

8. Departments of Biology and Pharmacology, University of North Carolina, Chapel Hill, Chapel Hill, NC 27599, USA.

9. Mendel Centre for Plant Genomics and Proteomics, Masaryk University, CEITEC MU, CZ-625 00 Brno, Czech Republic.

10. Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, The Chinese Academy of Sciences, Shanghai 200032, China.

Abstract

A Different Route The plant hormone auxin regulates a variety of developmental processes and responses to environmental inputs, often via changes in gene transcription. Xu et al. (p. 1025 ) analyzed a signaling pathway involving ABP1 (auxin-binding protein 1) that affects the cytoskeleton and endocytosis in Arabidopsis without changing gene transcription. Instead, ABP1 functions at the cell surface to bind auxin and a family of membrane kinases, thereby activating intracellular guanosine triphosphatases to initiate important developmental changes in cell shape.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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