Recombinant Human Isocitrate dehydrogenase [NAD] subunit beta, mitochondrial (IDH3B)

Uniprot Id

O43837

Target Species

Human

Target Name

IDH3B

Target Full Name

Isocitrate dehydrogenase [NAD] subunit beta, mitochondrial

Target Function

Plays a structural role to facilitate the assembly and ensure the full activity of the enzyme catalyzing the decarboxylation of isocitrate (ICT) into alpha-ketoglutarate. The heterodimer composed of the alpha (IDH3A) and beta (IDH3B) subunits and the heterodimer composed of the alpha (IDH3A) and gamma (IDH3G) subunits, have considerable basal activity but the full activity of the heterotetramer (containing two subunits of IDH3A, one of IDH3B and one of IDH3G) requires the assembly and cooperative function of both heterodimers.

Target Involvement

Retinitis pigmentosa 46 (RP46)

Target Subcellular Location

Mitochondrion.

Target Protein Families

Isocitrate and isopropylmalate dehydrogenases family

Target Research Area

Metabolism

Target Synonyms

FLJ11043; H-IDHB; Idh3B; IDH3B_HUMAN; Isocitrate dehydrogenase [NAD] subunit beta; Isocitrate dehydrogenase [NAD] subunit beta; mitochondrial ; isocitrate dehydrogenase 3; beta subunit ; Isocitric dehydrogenase; Isocitric dehydrogenase subunit beta; MGC903; mitochondrial; NAD(+)-specific ICDH; NAD(+)-specific ICDH subunit beta; NAD+-specific isocitrate dehydrogenase b subunit ; NAD+-specific isocitrate dehydrogenase beta ; OTTHUMP00000030023; OTTHUMP00000030024; RP46

Target Background

Isocitrate dehydrogenases catalyze the oxidative decarboxylation of isocitrate to 2-oxoglutarate. These enzymes belong to two distinct subclasses, one of which utilizes NAD(+) as the electron acceptor and the other NADP(+). Five isocitrate dehydrogenases have been reported: three NAD(+)-dependent isocitrate dehydrogenases, which localize to the mitochondrial matrix, and two NADP(+)-dependent isocitrate dehydrogenases, one of which is mitochondrial and the other predominantly cytosolic. NAD(+)-dependent isocitrate dehydrogenases catalyze the allosterically regulated rate-limiting step of the tricarboxylic acid cycle. Each isozyme is a heterotetramer that is composed of two alpha subunits, one beta subunit, and one gamma subunit. The protein encoded by this gene is the beta subunit of one isozyme of NAD(+)-dependent isocitrate dehydrogenase. Multiple alternatively spliced transcript variants encoding different isoforms have been described for this gene.