【摘 要】
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Dear Editor,The synthesis of tetrapyrroles,including chlorophylls,is central for chloroplast function.The metabolic pathway of tetrapyrrole biosynthesis in Arab
【机 构】
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Instituto de Bioquímica Vegetal y Fotosíntesis, Universidad de Sevilla-Consejo Superior de Investiga
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Dear Editor,The synthesis of tetrapyrroles,including chlorophylls,is central for chloroplast function.The metabolic pathway of tetrapyrrole biosynthesis in Arabidopsis is initiated with the formation of amino levulinic acid (ALA),which is converted by a series of common reactions to protoporphyrin Ⅸ (Proto Ⅸ) (Tanaka et al.,2011).Then the pathway diverges into two branches:the synthesis of heme/bilin and chlorophylls.The insertion of Mg2+ into Proto Ⅸ,catalyzed by Mg-chelatase,is the first committed reaction of the chlorophyll branch and is considered a key step for the regulation of the whole pathway.
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