Oxylipin biosynthesis in spikemoss Selaginella moellendorffii: Identification of allene oxide synthase (CYP74L2) and hydroperoxide lyase (CYP74L1)

Toporkova, Yana Y.; Askarova, Elena K.; Gorina, Svetlana S.; Mukhtarova, Lucia S.; Grechkin, Alexander N.

doi:10.1016/j.phytochem.2021.113051

Cited by 4 publications

(3 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The majority of tested 9-LOXs and 9-AOSs have been reported to be localized to the cytosol and/or organelles other than the chloroplast [6,28,29]. To date, all characterized cytosolic AOSs possessing 9-AOS activity display a strong affinity for both 9-and 13-hydroperoxide substrates; thus, they are characterized as dual-specific enzymes [6,19,23,[28][29][30][31][32]. Typically, AOSs that have this dual-specific activity are grouped within the CYP74C subfamily [26,28].…”

Section: Biosynthesis and Occurrence Of Ketolsmentioning

confidence: 99%

“…The mixed function 9/13-AOSs have been reported in fewer dicot species than monocot species. Flax, barley, maize, rice, tulips, petunia, potato, and tomato are among a few of the plant species identified so far that contain a dualspecific 9/13-AOS enzyme and therefore synthesize both 9-and 13-ketols [6,19,24,[28][29][30][31][32].…”

Section: Biosynthesis and Occurrence Of Ketolsmentioning

confidence: 99%

“…Both soft and stony corals also possess AOS enzymes, though it is not reported if these enzymes produce ketols [37,38]. Because liverworts, mosses, and green algae contain AOS enzymes [29,30,32], it is suggested that the introduction of AOS genes occurred before the evolution of terrestrial plants, and AOS enzymes were likely present in the last common ancestor of plants and animals [14,34]. Recently, a metabolic analysis of wounded Physcomitrium patens Mitt knockout mutants of the PpAOS1 gene uncovered that this enzyme is responsible for the synthesis of two α-ketols [39].…”

Section: Biosynthesis and Occurrence Of Ketolsmentioning

confidence: 99%

See 2 more Smart Citations

Ketols Emerge as Potent Oxylipin Signals Regulating Diverse Physiological Processes in Plants

Berg-Falloure

Kolomiets

2023

Plants

View full text Add to dashboard Cite

Plants produce an array of oxylipins implicated in defense responses against various stresses, with about 600 oxylipins identified in plants to date. Most known oxylipins are the products of lipoxygenase (LOX)-mediated oxygenation of polyunsaturated fatty acids. One of the most well-characterized oxylipins produced by plants is the hormone jasmonic acid (JA); however, the function of the vast majority of oxylipins remains a mystery. One of the lesser-studied groups of oxylipins is comprised of ketols produced by the sequential action of LOX, allene oxide synthase (AOS), followed by non-enzymatic hydrolysis. For decades, ketols were mostly considered mere by-products of JA biosynthesis. Recent accumulating evidence suggests that ketols exhibit hormone-like signaling activities in the regulation of diverse physiological processes, including flowering, germination, plant–symbiont interactions, and defense against biotic and abiotic stresses. To complement multiple reviews on jasmonate and overall oxylipin biology, this review focuses specifically on advancing our understanding of ketol biosynthesis, occurrence, and proposed functions in diverse physiological processes.

show abstract