Biosynthetic origin of the isoprene units in chromenes of Piper aduncum (Piperaceae)
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Metabolic studies involving the incorporation of [1-13C]-D- glucose into intact leaves of Piper aduncum (Piperaceae) have indicated that both the mevalonate (MVA) and the pyruvate-triose (MEP) non-mevalonate pathways are implicated in the biosynthesis of isoprene moieties present in methyl 2,2-dimethyl-2H-1-chromene-6-carboxylate (1) and methyl 2,2-dimethyl-8- (3′-methyl-2′-butenyl)-2H-1-chromene-6-carboxylate (2). The pattern of incorporation of label from [1-13C]-D-glucose into these chromenes was determined by quantitative 13C NMR spectroscopy. The results confirmed that biosynthetic compartment of 1 and 2 could either be the plastid and/ or the cytosol or, possibly, an additional compartment such as the plastid inter-membrane space. ©2007 Sociedade Brasileira de Química.
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2-C-methyl-D-erythritol-4-phosphate pathway, [1-13C]-D-glucose, Chromenes, Mevalonate pathway, Piper aduncum
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Inglês
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Journal of the Brazilian Chemical Society, v. 18, n. 8, p. 1500-1503, 2007.
