Protein
Magnesium-protoporphyrin IX monomethyl ester [oxidative] cyclase 1
Organism
Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576)
Function
Catalyzes the formation of the isocyclic ring in chlorophyll biosynthesis. Mediates the cyclase reaction, which results in the formation of divinylprotochlorophyllide (Pchlide) characteristic of all chlorophylls from magnesium-protoporphyrin IX 13-monomethyl ester (MgPMME).
Similarity
Belongs to the AcsF family.
Sequence
MVNTLPKPGIKTPSKETVLTPRFYTTDFETAANLDLSAQENELQAMLAEMRADYNRHHFVRDEAFEQSWEHIDGEARQAFIEYLERSCISEFSGFLLFKELSRKLKNRSPVLAEMFQLMARDEARHAGFLNKAMGDFKLSLDLATVTKTRTYTFFPIEWVLYTVYLSEKIGYWRYIIIFRHLEKHPENQFYPIFRYFESWCQDENRHGDIFKALLRSQPQLWNNWKARLWSRFFLLSVFATHTLTVHERSGFYKSLGLDATDFDLQVVRNTNETAGRAFPVMLNTEHPKFFPLLQRCAGYNLNISEIERSSQPKFVKLIRKLPLIAAIVWNLLMVYLIKPIDTEALRETVR