Isoflavonoids in non-leguminous taxa: a rarity or a rule?

Isoflavonoids in non-leguminous taxa: a rarity or a rule? Research Abstract Details

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Isoflavonoids in non-leguminous taxa: a rarity or a rule? Abstract Text:

Oldrich ,Oldrich Lapc�k,

Isoflavonoids are characteristic metabolites in legumes and an overwhelming number of reports concerning them come from the Leguminosae. Nevertheless, the spectrum of isoflavonoid producing taxa includes the representatives of four classes of multicellular plants, namely the Bryopsida, the Pinopsida, the Magnoliopsida and the Liliopsida. At least 59 non-leguminous families have been reported to produce isoflavones sensu lato; coumestans have been reported in 3 families, coumaronochromones in 3, pterocarpans in 9 and rotenoids in 8 families. Prenylated isoflavones have been found in 15 non-leguminous families and isoflavone dimers, heterodimers or oligomers in three families. More than two hundred different isoflavonoid aglycones have been reported in non-legumes altogether. The number of individual structures is even greater if the variety of glycosides are considered. Enzymology and genetics of isoflavonoid biosynthesis have been studied almost exclusively in legumes, with the exception of a few model plants (i.e. Beta vulgaris, Arabidopsis thaliana, Nicotiana tabacum and Zea mays). The key step at the very beginning of the isoflavonoid metabolic pathway is the oxidation of flavanone connected with the migration of aryl moiety from C2 to C3 mediated by a CYP450 enzyme isoflavone synthase (IFS), which has been identified and cloned in multiple legumes and in sugar beet (Beta vulgaris, Chenopodiaceae). No information is available about the enzyme(s) responsible for the biosynthesis of isoflavonoid core in other taxa. Experimental data demonstrates the capability of numerous enzymes of non-legume origin to metabolize isoflavones as alternative substrates to other phenolics.

Isoflavonoids in non-leguminous taxa: a rarity or a rule? Publishing Authors By Initials

O ,O Lapc�k,

For similar proteins: plant proteins research abstracts see: proteins: plant proteins research

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Isoflavonoids in non-leguminous taxa: a rarity or a rule? Journal Published:

PUBLICATION TYPE: Review

Journal: Phytochemistry

VOLUME: 68

Page Numbers: 2909-16

Journal Abbreviation: Phytochemistry

ISSN: 0031-9422

DAY: 29

MONTH: 09

YEAR: 2007

Isoflavonoids in non-leguminous taxa: a rarity or a rule? Information

Number of References: 61

LANGUAGE: eng

NlmUniqueID: 151434

Isoflavonoids in non-leguminous taxa: a rarity or a rule? Keywords Mesh Terms:

KEYWORDS: Plant Proteins

MESH TERMS: metabolism

Chemical & Substance for Abstract: Isoflavonoids in non-leguminous taxa: a rarity or a rule? Information

Substance Name: Plant Proteins

Registry Number: 0

Grant and Affiliation Information for Isoflavonoids in non-leguminous taxa: a rarity or a rule?

AFFILIATION: Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology, Institute of Chemical Technology in Prague, Technick� 5, 166 28 Praha 6, Czech Republic. oldrich.lapcik@vscht.cz

Country: United States