PIN proteins perform a rate-limiting function in cellular auxin efflux

J. Petrášek, J. Mravec, R. Bouchard, J. Blakeslee, M.F. Abas, D. Seifertová, J. Wiśniewska, Z. Tadele, M. Kubeš, M. Čovanová, P. Dhonukshe, P. Skůpa, E. Benková, L. Perry, P. Křeček, O. Lee, G. Fink, M. Geisler, A. Murphy, C. Luschnig, E. Zažímalová, J. Friml, Science 312 (2006) 914–918.

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Abstract
Intercellular flow of the phytohormone auxin underpins multiple developmental processes in plants. Plant-specific pin-formed (PIN) proteins and several phosphoglycoprotein (PGP) transporters are crucial factors in auxin transport-related development, yet the molecular function of PINs remains unknown. Here, we show that PINs mediate auxin efflux from mammalian and yeast cells without needing additional plant-specific factors. Conditional gain-of-function alleles and quantitative measurements of auxin accumulation in Arabidopsis and tobacco cultured cells revealed that the action of PINs in auxin efflux is distinct from PGP, rate-limiting, specific to auxins, and sensitive to auxin transport inhibitors. This suggests a direct involvement of PINs in catalyzing cellular auxin efflux.
Publishing Year
Date Published
2006-05-12
Journal Title
Science
Volume
312
Issue
5775
Page
914 - 918
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Petrášek J, Mravec J, Bouchard R, et al. PIN proteins perform a rate-limiting function in cellular auxin efflux. Science. 2006;312(5775):914-918. doi:10.1126/science.1123542
Petrášek, J., Mravec, J., Bouchard, R., Blakeslee, J., Abas, M. F., Seifertová, D., … Friml, J. (2006). PIN proteins perform a rate-limiting function in cellular auxin efflux. Science, 312(5775), 914–918. https://doi.org/10.1126/science.1123542
Petrášek, Jan, Jozef Mravec, Rodolphe Bouchard, Joshua Blakeslee, Melinda F Abas, Daniela Seifertová, Justyna Wiśniewska, et al. “PIN Proteins Perform a Rate-Limiting Function in Cellular Auxin Efflux.” Science 312, no. 5775 (2006): 914–18. https://doi.org/10.1126/science.1123542.
J. Petrášek et al., “PIN proteins perform a rate-limiting function in cellular auxin efflux,” Science, vol. 312, no. 5775, pp. 914–918, 2006.
Petrášek J, Mravec J, Bouchard R, Blakeslee J, Abas MF, Seifertová D, Wiśniewska J, Tadele Z, Kubeš M, Čovanová M, Dhonukshe P, Skůpa P, Benková E, Perry L, Křeček P, Lee O, Fink G, Geisler M, Murphy A, Luschnig C, Zažímalová E, Friml J. 2006. PIN proteins perform a rate-limiting function in cellular auxin efflux. Science. 312(5775), 914–918.
Petrášek, Jan, et al. “PIN Proteins Perform a Rate-Limiting Function in Cellular Auxin Efflux.” Science, vol. 312, no. 5775, American Association for the Advancement of Science, 2006, pp. 914–18, doi:10.1126/science.1123542.

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