Genetic disorders of vitamin B₁₂ metabolism: eight complementation groups--eight genes.
Vitamin B12 (cobalamin, Cbl) is an essential nutrient in human metabolism. Genetic diseases of vitamin B12 utilisation constitute an important fraction of inherited newborn disease. Functionally, B12 is the cofactor for methionine synthase and methylmalonyl CoA mutase. To function as a cofactor, B12 must be metabolised through a complex pathway that modifies its structure and takes it through subcellular compartments of the cell. Through the study of inherited disorders of vitamin B12 utilisation, the genes for eight complementation groups have been identified, leading to the determination of the general structure of vitamin B12 processing and providing methods for carrier testing, prenatal diagnosis and approaches to treatment.
Structural Genomics Consortium, University of Oxford, Oxford, UK.
D Sean
DS
Froese
Roy A
RA
Gravel
D013766:5-Methyltetrahydrofolate-Homocysteine S-Methyltransferase / Q000235:genetics / Q000502:physiology; D000214:Acyl Coenzyme A / Q000235:genetics / Q000502:physiology; D006801:Humans; D014805:Vitamin B 12 / Q000737:chemistry / Q000378:metabolism* / Q000493:pharmacokinetics; D014806:Vitamin B 12 Deficiency / Q000235:genetics* / Q000378:metabolism
D000214:Acyl Coenzyme A; C015357:methylmalonyl-coenzyme A; D013766:5-Methyltetrahydrofolate-Homocysteine S-Methyltransferase; D014805:Vitamin B 12