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Title: Synthesis and biological activity of amino acid conjugates of abscisic acid.
Authors: Todoroki, Yasushi
Narita, Kenta
Muramatsu, Taku
Shimomura, Hajime
Ohnishi, Toshiyuki
Mizutani, Masaharu
Ueno, Kotomi
Hirai, Nobuhiro
Journal Title: Bioorganic & Medicinal Chemistry
Publisher: Elsevier
Journal Volume: 19
Journal Issue: 5
Start Page: 1743
End Page: 1750
Issue Date: 2011-03-01
Rights: Copyright © 2011 Elsevier Ltd All rights reserved.
NDC: 471
Abstract: We prepared 19 amino acid conjugates of the plant hormone abscisic acid (ABA) and investigated their biological activity, enzymatic hydrolysis by a recombinant Arabidopsis amidohydrolases GST-ILR1 and GST-IAR3, and metabolic fate in rice seedlings. Different sets of ABA-amino acids induced ABA-like responses in different plants. Some ABA-amino acids, including some that were active in bioassays, were hydrolyzed by recombinant Arabidopsis GST-IAR3, although GST-ILR1 did not show hydrolysis activity for any of the ABA-amino acids. ABA-L-Ala, which was active in all the bioassays, an Arabidopsis seed germination, spinach seed germination, and rice seedling elongation assays, except in a lettuce seed germination assay and was hydrolyzed by GST-IAR3, was hydrolyzed to free ABA in rice seedlings. These findings suggest that some plant amidohydrolases hydrolyze some ABA-amino acid conjugates. Because our study indicates the possibility that different plants have hydrolyzing activity toward different ABA-amino acids, an ABA-amino acid may function as a species-selective pro-hormone of ABA.
ISSN: 09680896 OPAC
Publisher's DOI: 10.1016/j.bmc.2011.01.019   
PMID: 21310619
Journal NCID: AA10938083 OPAC ciniib
Textversion: author
Appears in Collections:06. 雑誌論文・記事(Journal Article, Article, Preprint)

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Others By: Todoroki, Yasushi (轟, 泰司) (トドロキ, ヤスシ) -- Narita, Kenta -- Muramatsu, Taku -- Shimomura, Hajime -- Ohnishi, Toshiyuki (大西, 利幸) (オオニシ, トシユキ) -- Mizutani, Masaharu -- Ueno, Kotomi -- Hirai, Nobuhiro

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