Protein
Magnesium protoporphyrin IX methyltransferase, chloroplastic
Organism
Arabidopsis thaliana
Function
Converts Mg-protoporphyrin IX to Mg-protoporphyrin IX methylester using S-adenosyl-L-methionine as a cofactor. Involved in chloroplast-to-nucleus signaling by acting as a negative effector of nuclear photosynthetic gene expression.
Similarity
Belongs to the class I-like SAM-binding methyltransferase superfamily. Magnesium protoporphyrin O-methyltransferase family.
Sequence
MPFAPSLLSSSSSVSQFLPRFPNATRFNVTPRSRAATVVAASVTDLAGVDSTTIAVLGGGSVAALAAMVSLTDPERRRKLQAEEVGGGDKEVVREYFNSTGFERWRKIYGETDEVNRVQKDIRLGHAKTVENTMLMLTEDRSLAGVTVCDAGCGTGLLSIPLAKEGAIVSASDISAAMVAEAEMKAKAQLPSENLPKFEVNDLESLTGKYDTVVCLDVLIHYPQNKADGMIAHLASLAEKRVILSFAPKTFYYDILKRIGELFPGPSKATRAYLHSEADVERALGKVGWKISKRGLTTTQFYFSRLIEAVPM