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Involved in chlorophyll biosynthesis. Catalyzes the insertion of magnesium ion into protoporphyrin IX to yield Mg-protoporphyrin IX. The magnesium-chelatase is a complex of three subunits, CHLI, CHLD and CHLH. The reaction takes place in two steps, with an ATP-dependent activation followed by an ATP-dependent chelation step. Possesses high affinity for ATP and may play a major role in chlorophyll biosynthesis. Does not bind abscisic acid (ABA), but is a positive regulator of ABA signaling.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: CH42; CS; Magnesium-chelatase subunit ChlI-1, chloroplastic; Mg-chelatase subunit I-1; Mg-protoporphyrin IX chelatase subunit ChlI-1; Protein CHLORINA 42
Gene Aliases: AT4G18480; CH-42; CH42; CHL11; CHLI-1; CHLI1; CHLORINA 42; CS; F28J12.140; F28J12_140; LOST1; low temperature with open-stomata 1; PROTOPORPHYRIN-IX MG-CHELATASE
UniProt ID: (Arabidopsis) P16127
Entrez Gene ID: (Arabidopsis) 827580
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