A new family of RhoGEFs activates the Rop molecular switch in plants

Antje Berken (), Christoph Thomas and Alfred Wittinghofer
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Antje Berken: Max Planck Institute of Molecular Physiology
Christoph Thomas: Max Planck Institute of Molecular Physiology
Alfred Wittinghofer: Max Planck Institute of Molecular Physiology

Nature, 2005, vol. 436, issue 7054, 1176-1180

Abstract: Plants go it alone Small Ras-related proteins act as molecular switches to regulate pivotal processes in living organisms. In plants, Rop proteins are key regulators, but it is not clear how these switches are turned on as plants lack the common activators known from animal and yeast systems. Now, a novel family of plant proteins that does the equivalent job has been identified. These previously unknown guanine nucleotide exchange factors activate the Rop switch in Arabidopsis. Though the regulatory system of molecular switches is generally conserved between eukaryotic organisms, these new activator proteins are exclusive to plants and may represent a late invention in evolution.

Date: 2005
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DOI: 10.1038/nature03883

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