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Arabidopsis PIS1 encodes the ABCG37 transporter of auxinic compounds including the auxin precursor indole-3-butyric acid

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Abstract
Differential distribution of the plant hormone auxin within tissues mediates a variety of developmental processes. Cellular auxin levels are determined by metabolic processes including synthesis, degradation, and (de)conjugation, as well as by auxin transport across the plasma membrane. Whereas transport of free auxins such as naturally occurring indole-3-acetic acid (IAA) is well characterized, little is known about the transport of auxin precursors and metabolites. Here, we identify a mutation in the ABCG37 gene of Arabidopsis that causes the polar auxin transport inhibitor sensitive1 (pis1) phenotype manifested by hypersensitivity to auxinic compounds. ABCG37 encodes the pleiotropic drug resistance transporter that transports a range of synthetic auxinic compounds as well as the endogenous auxin precursor indole-3-butyric acid (IBA), but not free IAA. ABCG37 and its homolog ABCG36 act redundantly at outermost root plasma membranes and, unlike established IAA transporters from the PIN and ABCB families, transport IBA out of the cells. Our findings explore possible novel modes of regulating auxin homeostasis and plant development by means of directional transport of the auxin precursor IBA and presumably also other auxin metabolites.
Keywords
RESISTANCE, THALIANA, IDENTIFICATION, PIN, EFFLUX, EXPRESSION, auxin synthesis, IBA transport, PDR8, PDR9, PROTEIN

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Citation

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Chicago
Ruzicka, Kamil, Lucia C Strader, Aurélien Bailly, Haibing Yang, Joshua Blakeslee, Lukasz Langowski, Eliška Nejedlá, et al. 2010. “Arabidopsis PIS1 Encodes the ABCG37 Transporter of Auxinic Compounds Including the Auxin Precursor Indole-3-butyric Acid.” Proceedings of the National Academy of Sciences of the United States of America 107 (23): 10749–10753.
APA
Ruzicka, K., Strader, L. C., Bailly, A., Yang, H., Blakeslee, J., Langowski, L., Nejedlá, E., et al. (2010). Arabidopsis PIS1 encodes the ABCG37 transporter of auxinic compounds including the auxin precursor indole-3-butyric acid. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 107(23), 10749–10753.
Vancouver
1.
Ruzicka K, Strader LC, Bailly A, Yang H, Blakeslee J, Langowski L, et al. Arabidopsis PIS1 encodes the ABCG37 transporter of auxinic compounds including the auxin precursor indole-3-butyric acid. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 2010;107(23):10749–53.
MLA
Ruzicka, Kamil, Lucia C Strader, Aurélien Bailly, et al. “Arabidopsis PIS1 Encodes the ABCG37 Transporter of Auxinic Compounds Including the Auxin Precursor Indole-3-butyric Acid.” PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 107.23 (2010): 10749–10753. Print.
@article{1008286,
  abstract     = {Differential distribution of the plant hormone auxin within tissues mediates a variety of developmental processes. Cellular auxin levels are determined by metabolic processes including synthesis, degradation, and (de)conjugation, as well as by auxin transport across the plasma membrane. Whereas transport of free auxins such as naturally occurring indole-3-acetic acid (IAA) is well characterized, little is known about the transport of auxin precursors and metabolites. Here, we identify a mutation in the ABCG37 gene of Arabidopsis that causes the polar auxin transport inhibitor sensitive1 (pis1) phenotype manifested by hypersensitivity to auxinic compounds. ABCG37 encodes the pleiotropic drug resistance transporter that transports a range of synthetic auxinic compounds as well as the endogenous auxin precursor indole-3-butyric acid (IBA), but not free IAA. ABCG37 and its homolog ABCG36 act redundantly at outermost root plasma membranes and, unlike established IAA transporters from the PIN and ABCB families, transport IBA out of the cells. Our findings explore possible novel modes of regulating auxin homeostasis and plant development by means of directional transport of the auxin precursor IBA and presumably also other auxin metabolites.},
  author       = {Ruzicka, Kamil and Strader, Lucia C and Bailly, Aur{\'e}lien and Yang, Haibing and Blakeslee, Joshua and Langowski, Lukasz and Nejedl{\'a}, Eli\v{s}ka and Fujita, Hironori and Itoh, Hironori and Sy\={o}no, Kunihiko and Hej{\'a}tko, Jan and Gray, William M and Martinoia, Enrico and Geisler, Markus and Bartel, Bonnie and Murphy, Angus S and Friml, Jiri},
  issn         = {0027-8424},
  journal      = {PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA},
  keyword      = {RESISTANCE,THALIANA,IDENTIFICATION,PIN,EFFLUX,EXPRESSION,auxin synthesis,IBA transport,PDR8,PDR9,PROTEIN},
  language     = {eng},
  number       = {23},
  pages        = {10749--10753},
  title        = {Arabidopsis PIS1 encodes the ABCG37 transporter of auxinic compounds including the auxin precursor indole-3-butyric acid},
  url          = {http://dx.doi.org/10.1073/pnas.1005878107},
  volume       = {107},
  year         = {2010},
}

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