Isocitrate/isopropylmalate dehydrogenase, conserved site

Definition

Isocitrate dehydrogenase (IDH) [[cite:PMID:2682654], [cite:PMID:1939242]] is an important enzyme of carbohydrate metabolism which catalyses the oxidative decarboxylation of isocitrate into alpha-ketoglutarate. IDH is either dependent on NAD+ ([ec:1.1.1.41]) or on NADP+ ([ec:1.1.1.42]). In eukaryotes there are at least three isozymes of IDH: two are located in the mitochondrial matrix (one NAD+-dependent, the other NADP+-dependent), while the third one (also NADP+-dependent) is cytoplasmic. In Escherichia coli the activity of a NADP+-dependent form of the enzyme is controlled by the phosphorylation of a serine residue; the phosphorylated form of IDH is completely inactivated. 3-isopropylmalate dehydrogenase ([ec:1.1.1.85]) (IMDH) [[cite:PMID:1748999], [cite:PMID:7773180]] catalyses the third step in the biosynthesis of leucine in bacteria and fungi, the oxidative decarboxylation of 3-isopropylmalate into 2-oxo-4-methylvalerate. Tartrate dehydrogenase ([ec:1.1.1.93]) PMID:8053675 catalyses the reduction of tartrate to oxaloglycolate. These enzymes are evolutionary related [[cite:PMID:2682654], [cite:PMID:1748999], [cite:PMID:7773180], [cite:PMID:8053675]]. The signature pattern of this entry is located in a conserved region, which contains a glycine-rich stretch of residues located in the C-terminal section.

5 human proteins with this domain

Each is a reviewed human protein in the Seroatlas serome and a potential autoantibody target; this domain groups them into one antibody-relevant category. Every entry links to its own record.

Download CSV (5 proteins: gene, accession, name)

• IDH1
• IDH2
• IDH3A
• IDH3B
• IDH3G