Journal of Plant Research

, Volume 128, Issue 4, pp 679–686 | Cite as

Identification of Arabidopsis thaliana NRT1/PTR FAMILY (NPF) proteins capable of transporting plant hormones

  • Yasutaka Chiba
  • Takafumi Shimizu
  • Shinya Miyakawa
  • Yuri Kanno
  • Tomokazu Koshiba
  • Yuji Kamiya
  • Mitsunori SeoEmail author
Regular Paper


NRT1/PTR FAMILY (NPF) proteins were originally identified as nitrate or di/tri-peptide transporters. Recent studies revealed that this transporter family also transports the plant hormones auxin (indole-3-acetic acid), abscisic acid (ABA), and gibberellin (GA), as well as secondary metabolites (glucosinolates). We developed modified yeast two-hybrid systems with receptor complexes for GA and jasmonoyl-isoleucine (JA-Ile), to detect GA and JA-Ile transport activities of proteins expressed in the yeast cells. Using these GA and JA-Ile systems as well as the ABA system that we had introduced previously, we determined the capacities of Arabidopsis NPFs to transport these hormones. Several NPFs induced the formation of receptor complexes under relatively low hormone concentrations. Hormone transport activities were confirmed for some NPFs by direct analysis of hormone uptake of yeast cells by liquid chromatography–tandem mass spectrometry. Our results suggest that at least some NPFs could function as hormone transporters.


Abscisic acid (ABA) Arabidopsis (Arabidopsis thalianaGibberellin (GA) Jasmonoyl-isoleucine (JA-Ile) NRT1/PTR FAMILY (NPF) Transport 



This work was supported in part by the Japan Society of Promotion of Science (JSPS) KAKENHI [Challenging Exploratory Research (24657040) to M.S.].

Supplementary material

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Supplementary material 1 (PDF 93 kb)
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Supplementary material 3 (DOCX 87.4 kb)
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Supplementary material 4 (DOCX 62.8 kb)


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Copyright information

© The Botanical Society of Japan and Springer Japan 2015

Authors and Affiliations

  • Yasutaka Chiba
    • 1
    • 2
  • Takafumi Shimizu
    • 2
  • Shinya Miyakawa
    • 1
  • Yuri Kanno
    • 2
  • Tomokazu Koshiba
    • 1
  • Yuji Kamiya
    • 2
  • Mitsunori Seo
    • 1
    • 2
    Email author
  1. 1.Department of Biological SciencesTokyo Metropolitan UniversityHachioji-shiJapan
  2. 2.RIKEN Center for Sustainable Resource ScienceYokohamaJapan

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