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D27-like carotenoid isomerases: at the crossroads of strigolactone and abscisic acid biosynthesis.
Tolnai, Zoltán; Sharma, Himani; Soós, Vilmos.
Afiliação
  • Tolnai Z; Agricultural Institute, Centre for Agricultural Research, ELKH, 2462 Martonvásár, Brunszvik u. 2, Hungary.
  • Sharma H; Agricultural Institute, Centre for Agricultural Research, ELKH, 2462 Martonvásár, Brunszvik u. 2, Hungary.
  • Soós V; Agricultural Institute, Centre for Agricultural Research, ELKH, 2462 Martonvásár, Brunszvik u. 2, Hungary.
J Exp Bot ; 75(4): 1148-1158, 2024 Feb 12.
Article em En | MEDLINE | ID: mdl-38006582
Strigolactones and abscisic acid (ABA) are apocarotenoid-derived plant hormones. Their biosynthesis starts with the conversion of trans-carotenes into cis forms, which serve as direct precursors. Iron-containing DWARF27 isomerases were shown to catalyse or contribute to the trans/cis conversions of these precursor molecules. D27 converts trans-ß-carotene into 9-cis-ß-carotene, which is the first committed step in strigolactone biosynthesis. Recent studies found that its paralogue, D27-LIKE1, also catalyses this conversion. A crucial step in ABA biosynthesis is the oxidative cleavage of 9-cis-violaxanthin and/or 9-cis-neoxanthin, which are formed from their trans isomers by unknown isomerases. Several lines of evidence point out that D27-like proteins directly or indirectly contribute to 9-cis-violaxanthin conversion, and eventually ABA biosynthesis. Apparently, the diversity of D27-like enzymatic activity is essential for the optimization of cis/trans ratios, and hence act to maintain apocarotenoid precursor pools. In this review, we discuss the functional divergence and redundancy of D27 paralogues and their potential direct contribution to ABA precursor biosynthesis. We provide updates on their gene expression regulation and alleged Fe-S cluster binding feature. Finally, we conclude that the functional divergence of these paralogues is not fully understood and we provide an outlook on potential directions in research.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ácido Abscísico / Beta Caroteno / Compostos Heterocíclicos com 3 Anéis / Lactonas Idioma: En Revista: J Exp Bot Assunto da revista: BOTANICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Hungria

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ácido Abscísico / Beta Caroteno / Compostos Heterocíclicos com 3 Anéis / Lactonas Idioma: En Revista: J Exp Bot Assunto da revista: BOTANICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Hungria