The plant hormone auxin is a key regulator of plant growth and development. Differences in auxin distribution within tissues are mediated by the polar auxin transport machinery, and cellular auxin responses occur depending on changes in cellular auxin levels. Multiple receptor systems at the cell surface and in the interior operate to sense and interpret fluctuations in auxin distribution that occur during plant development. Until now, three proteins or protein complexes that can bind auxin have been identified. SCFTIR1 [a SKP1-cullin-1-F-box complex that contains transport inhibitor response 1 (TIR1) as the F-box protein] and S-phase-kinaseassociated protein 2 (SKP2) localize to the nucleus, whereas auxinbinding protein 1 (ABP1), predominantly associates with the endoplasmic reticulum and cell surface. In this Cell Science at a Glance article, we summarize recent discoveries in the field of auxin transport and signaling that have led to the identification of new components of these pathways, as well as their mutual interaction.
Journal of Cell Science
This work was supported by the European Research Council [project ERC-2011-StG-20101109-PSDP]; European Social Fund [grant number CZ.1.07/2.3.00/20.0043] and the Czech Science Foundation GAČR [grant number GA13-40637S]
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Grones P, Friml J. Auxin transporters and binding proteins at a glance. Journal of Cell Science. 2015;128(1):1-7. doi:10.1242/jcs.159418
Grones, P., & Friml, J. (2015). Auxin transporters and binding proteins at a glance. Journal of Cell Science. Company of Biologists. https://doi.org/10.1242/jcs.159418
Grones, Peter, and Jiří Friml. “Auxin Transporters and Binding Proteins at a Glance.” Journal of Cell Science. Company of Biologists, 2015. https://doi.org/10.1242/jcs.159418.
P. Grones and J. Friml, “Auxin transporters and binding proteins at a glance,” Journal of Cell Science, vol. 128, no. 1. Company of Biologists, pp. 1–7, 2015.
Grones P, Friml J. 2015. Auxin transporters and binding proteins at a glance. Journal of Cell Science. 128(1), 1–7.
Grones, Peter, and Jiří Friml. “Auxin Transporters and Binding Proteins at a Glance.” Journal of Cell Science, vol. 128, no. 1, Company of Biologists, 2015, pp. 1–7, doi:10.1242/jcs.159418.