InterPro domain: IPR041702

Magnesium chelatase catalyses the insertion of Mg into protoporphyrin IX (Proto). In chlorophyll biosynthesis, insertion of Mg2+ into protoporphyrin IX is catalysed by magnesium chelatase in an ATP-dependent reaction. The Mg-chelatase subunits are designated ChlI, ChlD and ChlH in plants and BchI, BchD and BchH in bacteriochlorophyll synthesis. BchD contains a AAA domain at its N terminus and a VWA domain at its C terminus. The VWA domain has been speculated to be involved in mediating protein-protein interactions. This entry represents the VWA domain found in bacterial BchD and plant ChlD [ 1 , 2 ].

1. Interplay between an AAA module and an integrin I domain may regulate the function of magnesium chelatase. J. Mol. Biol. 311, 111-22
2. Roles of the different components of magnesium chelatase in abscisic acid signal transduction. Plant Mol. Biol. 80, 519-37