Page last updated: 2024-10-06

Cobalamin (Cbl) metabolism

Proteins (7)

ProteinSynonymsTaxonomy
Cobalamin trafficking protein CblDCblD; Methylmalonic aciduria and homocystinuria type D protein, mitochondrialHomo sapiens (human)
Methionine synthaseMS; EC 2.1.1.13; 5-methyltetrahydrofolate--homocysteine methyltransferase; Cobalamin-dependent methionine synthase; Vitamin-B12 dependent methionine synthaseHomo sapiens (human)
Cyanocobalamin reductase / alkylcobalamin dealkylaseAlkylcobalamin:glutathione S-alkyltransferase; 2.5.1.151; CblC; Cyanocobalamin reductase (cyanide-eliminating); 1.16.1.6; Methylmalonic aciduria and homocystinuria type C protein; MMACHCHomo sapiens (human)
Methylmalonyl-CoA mutase, mitochondrialMCM; EC 5.4.99.2; Methylmalonyl-CoA isomeraseHomo sapiens (human)
Methionine synthase reductase MSR; EC 1.16.1.8; Aquacobalamin reductase; AqCbl reductase; 1.16.1.-Homo sapiens (human)
Corrinoid adenosyltransferaseEC 2.5.1.17; Cob(II)alamin adenosyltransferase; Cob(II)yrinic acid a,c-diamide adenosyltransferase; Cobinamide/cobalamin adenosyltransferase; Methylmalonic aciduria type B proteinHomo sapiens (human)
Methylmalonic aciduria type A protein, mitochondrialEC 3.6.-.-Homo sapiens (human)

Compounds (15)

CompoundDescription
hydronium ion
NADH
ZincA metallic element of atomic number 30 and atomic weight 65.38. It is a necessary trace element in the diet, forming an essential part of many enzymes, and playing an important role in protein synthesis and in cell division. Zinc deficiency is associated with ANEMIA, short stature, HYPOGONADISM, impaired WOUND HEALING, and geophagia. It is known by the symbol Zn.
Flavin MononucleotideA coenzyme for a number of oxidative enzymes including NADH DEHYDROGENASE. It is the principal form in which RIBOFLAVIN is found in cells and tissues.
Cobalamins
5-methyltetrahydrofolate
1,5-dihydro-FADchromophore component of E coli DNA photolyase
cobamamide
nadA coenzyme composed of ribosylnicotinamide 5'-diphosphate coupled to adenosine 5'-phosphate by pyrophosphate linkage. It is found widely in nature and is involved in numerous enzymatic reactions in which it serves as an electron carrier by being alternately oxidized (NAD+) and reduced (NADH). (Dorland, 27th ed)
NADPNicotinamide adenine dinucleotide phosphate. A coenzyme composed of ribosylnicotinamide 5'-phosphate (NMN) coupled by pyrophosphate linkage to the 5'-phosphate adenosine 2',5'-bisphosphate. It serves as an electron carrier in a number of reactions, being alternately oxidized (NADP+) and reduced (NADPH). (Dorland, 27th ed)
NADPNicotinamide adenine dinucleotide phosphate. A coenzyme composed of ribosylnicotinamide 5'-phosphate (NMN) coupled by pyrophosphate linkage to the 5'-phosphate adenosine 2',5'-bisphosphate. It serves as an electron carrier in a number of reactions, being alternately oxidized (NADP+) and reduced (NADPH). (Dorland, 27th ed)
adenosine triphosphateAn adenine nucleotide containing three phosphate groups esterified to the sugar moiety. In addition to its crucial roles in metabolism adenosine triphosphate is a neurotransmitter.
hydrogen cyanideHydrogen cyanide (HCN); A toxic liquid or colorless gas. It is found in the smoke of various tobacco products and released by combustion of nitrogen-containing organic materials.
s-adenosylmethioninePhysiologic methyl radical donor involved in enzymatic transmethylation reactions and present in all living organisms. It possesses anti-inflammatory activity and has been used in treatment of chronic liver disease. (From Merck, 11th ed)
Flavin-Adenine DinucleotideA condensation product of riboflavin and adenosine diphosphate. The coenzyme of various aerobic dehydrogenases, e.g., D-amino acid oxidase and L-amino acid oxidase. (Lehninger, Principles of Biochemistry, 1982, p972)