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Research ArticleCELL BIOLOGY AND SIGNAL TRANSDUCTION
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ANT1, an Aromatic and Neutral Amino Acid Transporter in Arabidopsis

Lishan Chen, Adriana Ortiz-Lopez, Alan Jung, Daniel R. Bush
Lishan Chen
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Adriana Ortiz-Lopez
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Alan Jung
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Daniel R. Bush
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Published April 2001. DOI: https://doi.org/10.1104/pp.125.4.1813

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  • Copyright © 2001 American Society of Plant Physiologists

Abstract

A new amino acid transporter was identified from the Arabidopsis expressed sequence tag cDNAs by expressing the cDNA in a yeast amino acid transport mutant. Transport analysis of the expressed protein in yeast showed that it transports aromatic and neutral amino acids, as well as arginine. This transporter (ANT1, aromatic and neutral transporter) also transports indole-3-acetic acid and 2,4-dichlorophenoxyacetic acid. The cDNA is 1.6 kb in length with an open reading frame that codes for a protein with 432 amino acids and a calculated molecular mass of 50 kD. Hydropathy analysis showedANT1 is an integral membrane protein with 11 putative membrane-spanning domains. Southern analysis and a BLAST search of the Arabidopsis genome database suggests that ANT1 is part of a small gene family containing at least five members. Phylogenetic comparisons with other known amino acid transporters in plants suggests that ANT1 represents a new class of amino acid transporter. RNA gel-blot analysis showed that this transporter is expressed in all organs with highest abundance in flowers and cauline leaves.

  • Received August 31, 2000.
  • Revision received October 13, 2000.
  • Accepted November 24, 2000.
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ANT1, an Aromatic and Neutral Amino Acid Transporter in Arabidopsis
Lishan Chen, Adriana Ortiz-Lopez, Alan Jung, Daniel R. Bush
Plant Physiology Apr 2001, 125 (4) 1813-1820; DOI: 10.1104/pp.125.4.1813

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ANT1, an Aromatic and Neutral Amino Acid Transporter in Arabidopsis
Lishan Chen, Adriana Ortiz-Lopez, Alan Jung, Daniel R. Bush
Plant Physiology Apr 2001, 125 (4) 1813-1820; DOI: 10.1104/pp.125.4.1813
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Plant Physiology: 125 (4)
Plant Physiology
Vol. 125, Issue 4
Apr 2001
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  • Architecture-Based Multiscale Computational Modeling of Plant Cell Wall Mechanics to Examine the Hydrogen-Bonding Hypothesis of the Cell Wall Network Structure Model
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