RRC ID 63919
著者 Aoi Y, Hira H, Hayakawa Y, Liu H, Fukui K, Dai X, Tanaka K, Hayashi KI, Zhao Y, Kasahara H.
タイトル UDP-glucosyltransferase UGT84B1 regulates the levels of indole-3-acetic acid and phenylacetic acid in Arabidopsis.
ジャーナル Biochem Biophys Res Commun
Abstract Auxin is a key plant growth regulator for diverse developmental processes in plants. Indole-3-acetic acid (IAA) is a primary plant auxin that regulates the formation of various organs. Plants also produce phenylacetic acid (PAA), another natural auxin, which occurs more abundantly than IAA in various plant species. Although it has been demonstrated that the two auxins have distinct transport characteristics, the metabolic pathways and physiological roles of PAA in plants remain unsolved. In this study, we investigated the role of Arabidopsis UDP-glucosyltransferase UGT84B1 in IAA and PAA metabolism. We demonstrated that UGT84B1, which converts IAA to IAA-glucoside (IAA-Glc), can also catalyze the conversion of PAA to PAA-glucoside (PAA-Glc), with a higher catalytic activity in vitro. Furthermore, we showed a significant increase in both the IAA and PAA levels in the ugt84b1 null mutants. However, no obvious developmental phenotypes were observed in the ugt84b1 mutants under laboratory growth conditions. Moreover, the overexpression of UGT84B1 resulted in auxin-deficient root phenotypes and changes in the IAA and PAA levels. Our results indicate that UGT84B1 plays an important role in IAA and PAA homeostasis in Arabidopsis.
巻・号 532(2)
ページ 244-250
公開日 2020-11-5
DOI 10.1016/j.bbrc.2020.08.026
PII S0006-291X(20)31577-1
PMID 32868079
PMC PMC7641881
MeSH Arabidopsis / genetics Arabidopsis / metabolism* Arabidopsis Proteins / genetics Arabidopsis Proteins / metabolism* CRISPR-Cas Systems Escherichia coli / genetics Escherichia coli / metabolism Gene Expression Regulation, Plant Glucosyltransferases / genetics Glucosyltransferases / metabolism* Indoleacetic Acids / metabolism* Mutation Phenylacetates / metabolism* Plants, Genetically Modified
IF 2.985
リソース情報
シロイヌナズナ / 植物培養細胞・遺伝子 pda11460