page_title: Magnesium chelatase
hierarchical_section_title: Magnesium chelatase
caption_attribution_description: English: Magnesium chelatase hetero12mer, Rhodobacter capsulatus
context_page_description: Magnesium-chelatase is a three-component enzyme that catalyses the insertion of Mg²⁺ into protoporphyrin IX. This is the first unique step in the synthesis of chlorophyll and bacteriochlorophyll. As a result, it is thought that Mg-chelatase has an important role in channeling intermediates into the chlorophyll branch in response to conditions suitable for photosynthetic growth:
  The four substrates of this enzyme are ATP, protoporphyrin IX, Mg²⁺, and H₂O; its four products are ADP, phosphate, Mg-protoporphyrin IX, and H⁺.
  This enzyme belongs to the family of ligases, specifically those forming nitrogen-D-metal bonds in coordination complexes. The systematic name of this enzyme class is Mg-protoporphyrin IX magnesium-lyase. Other names in common use include protoporphyrin IX magnesium-chelatase, protoporphyrin IX Mg-chelatase, magnesium-protoporphyrin IX chelatase, magnesium-protoporphyrin chelatase, magnesium-chelatase, Mg-chelatase, and Mg-protoporphyrin IX magnesio-lyase. This enzyme is part of the biosynthetic pathway to chlorophylls.
context_section_description: Magnesium-chelatase is a three-component enzyme that catalyses the insertion of Mg²⁺ into protoporphyrin IX. This is the first unique step in the synthesis of chlorophyll and bacteriochlorophyll. As a result, it is thought that Mg-chelatase has an important role in channeling intermediates into the (bacterio)chlorophyll branch in response to conditions suitable for photosynthetic growth:
  The four substrates of this enzyme are ATP, protoporphyrin IX, Mg²⁺, and H₂O; its four products are ADP, phosphate, Mg-protoporphyrin IX, and H⁺.
  This enzyme belongs to the family of ligases, specifically those forming nitrogen-D-metal bonds in coordination complexes.  The systematic name of this enzyme class is Mg-protoporphyrin IX magnesium-lyase. Other names in common use include protoporphyrin IX magnesium-chelatase, protoporphyrin IX Mg-chelatase, magnesium-protoporphyrin IX chelatase, magnesium-protoporphyrin chelatase, magnesium-chelatase, Mg-chelatase, and Mg-protoporphyrin IX magnesio-lyase. This enzyme is part of the biosynthetic pathway to chlorophylls.
caption: Magnesium chelatase hetero12mer, Rhodobacter capsulatus
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