Phospholipases and the network of auxin signal transduction with ABP1 and TIR1 as two receptors: a comprehensive and provocative model

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Scherer, Guenther F. E.; Labusch, Corinna; Effendi, Yunus: Phospholipases and the network of auxin signal transduction with ABP1 and TIR1 as two receptors: a comprehensive and provocative model. In: Frontiers in Plant Science 3 (2012), 56. DOI:

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Sum total of downloads: 150

Three types of phospholipases, phospholipase D, secreted phospholipase A2, and patatin-related phospholipase A (pPLA) have functions in auxin signal transduction. Potential linkage to auxin receptors ABP1 or TIR1, their rapid activation or post-translational activation mechanisms, and downstream functions regulated by these phospholipases is reviewed and discussed. Only for pPLA all aspects are known at least to some detail. Evidence is gathered that all these signal reactions are located in the cytosol and seem to merge on regulation of PIN-catalyzed auxin efflux transport proteins. As a consequence, auxin concentration in the nucleus is also affected and this regulates the E3 activity of this auxin receptor. We showed that ABP1, PIN2, and pPLA, all outside the nucleus, have an impact on regulation of auxin-induced genes within 30 min. We propose that regulation of PIN protein activities and of auxin efflux transport are the means to coordinate ABP1 and TIR1 activity and that no physical contact between components of the ABP1-triggered cytosolic pathways and TIR1-triggered nuclear pathways of signaling is necessary to perform this.
License of this version: CC BY-NC 3.0 Unported
Document Type: article
Publishing status: publishedVersion
Issue Date: 2012
Appears in Collections:Naturwissenschaftliche Fakultät

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pos. country downloads
total perc.
1 image of flag of Germany Germany 131 87.33%
2 image of flag of United States United States 7 4.67%
3 image of flag of France France 3 2.00%
4 image of flag of China China 2 1.33%
5 image of flag of No geo information available No geo information available 1 0.67%
6 image of flag of Sweden Sweden 1 0.67%
7 image of flag of Portugal Portugal 1 0.67%
8 image of flag of United Kingdom United Kingdom 1 0.67%
9 image of flag of Finland Finland 1 0.67%
10 image of flag of Bulgaria Bulgaria 1 0.67%
    other countries 1 0.67%

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