Target intelligence / Profile preview

Cobalamin-dependent enzyme

Molecular classification
Enzyme
01

Overview

Cobalamin-dependent enzymes are a class of enzymes that require cobalamin (vitamin B12) as a cofactor for their catalytic activity. Cobalamin is a complex organometallic molecule featuring a central cobalt atom, and it exists in several biologically active forms, most notably methylcobalamin (MeCbl) and adenosylcobalamin (AdoCbl). These enzymes play essential roles in various metabolic pathways across bacteria, fungi, animals, and humans. Key examples include methionine synthase and methylmalonyl-CoA mutase. Deficiencies or mutations affecting cobalamin-dependent enzyme function can lead to serious metabolic disorders.

02

Mechanism of action

Varies depending on the specific enzyme; includes methyl group transfer and radical-based rearrangement reactions.

03

Biological functions

Methyl group transferRadical-mediated rearrangementsAmino acid metabolismFatty acid catabolismEnvironmental detoxificationDNA synthesis
04

Disease associations

HomocystinuriaMethylmalonic acidemia
05

Safety considerations

Deficiencies can lead to serious metabolic disorders.Mutations affecting enzyme function can cause metabolic disorders.

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