Carotenoid biosynthesis in vitro conversion of antheraxanthin to capsanthin by a chromoplast enriched fraction of Capsicum fruits期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Carotenoid biosynthesis in vitro conversion of antheraxanthin to capsanthin by a chromoplast enriched fraction of Capsicum fruits

Authors:	B Camara R Moneger

Institution:	Laboratoire de Régulations Métaboliques et Différenciation des Plastes Institut de Biologie Végétale Université Paris VI Tour 53, 4 Place Jussieu, 75230 Paris Cedex 05 France

Abstract:	A chromoplast preparation from $Capsicum annuum$ fruit catalyses the conversion of antheraxanthin into capsanthin (the main carotenoid of this fruit). The reaction is not affected by ATP, NADP or NADPH. The optimal pH is in the broad range 7–8. The role played by epoxy-xanthophylls in the biogenesis of $Capsicum$ ketocarotenoids is enhanced by the ability of the chromoplast to carry out the epoxidation of zeaxanthin.

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