Family

Magnesium-protoporphyrin IX methyltransferase (IPR010251)

Short name: Mg_prot_MeTrfase

Family relationships

None.

Description

This entry represents magnesium-protoporphyrin IX methyltransferase (EC:2.1.1.11). This converts magnesium-protoporphyrin IX to magnesium-protoporphyrin IX metylester using S-adenosyl-L-methionine as a cofactor [PMID: 8071204], which represents the second committed step in the biosynthesis of chlorophyll and bacteriochlorophyll from protoporphyrin IX [PMID: 8071204, PMID: 7925960, PMID: 12489983].

Methyltransferases (EC 2.1.1.-) constitute an important class of enzymes present in every life form. They transfer a methyl group most frequently from S-adenosyl L-methionine (SAM or AdoMet) to a nucleophilic acceptor such as oxygen leading to S-adenosyl-L-homocysteine (AdoHcy) and a methylated molecule [PMID: 16225687, PMID: 21858014, PMID: 12826405]. All these enzymes have in common a conserved region of about 130 amino acid residues that allow them to bind SAM [PMID: 7897657]. The substrates that are methylated by these enzymes cover virtually every kind of biomolecules ranging from small molecules, to lipids, proteins and nucleic acids [PMID: 16225687, PMID: 21858014, PMID: 7897657]. Methyltransferase are therefore involved in many essential cellular processes including biosynthesis, signal transduction, protein repair, chromatin regulation and gene silencing [PMID: 16225687, PMID: 21858014, PMID: 12826405]. More than 230 families of methyltransferases have been described so far, of which more than 220 use SAM as the methyl donor.

GO terms

Biological Process

GO:0015995 chlorophyll biosynthetic process

Molecular Function

GO:0046406 magnesium protoporphyrin IX methyltransferase activity

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.
TIGRFAMs
PROSITE profiles