Search results
Results from the WOW.Com Content Network
The ALDH2 gene is about 44 kbp in length and contains at least 13 exons which encode 517 amino acid residues. Except for the signal NH2-terminal peptide, which is absent in the mature enzyme, the amino acid sequence deduced from the exons coincided with the reported primary structure of human liver ALDH2.
Aldehyde dehydrogenase is a polymorphic enzyme [3] responsible for the oxidation of aldehydes to carboxylic acids. [3] There are three different classes of these enzymes in mammals: class 1 (low K m, cytosolic), class 2 (low K m, mitochondrial), and class 3 (high K m, such as those expressed in tumors, stomach, and cornea).
ALDH2, which has a lower K M for acetaldehydes than ALDH1 and acts predominantly in the mitochondrial matrix, is the main enzyme in acetaldehyde metabolism and has three genotypes. A single point mutation (G → A) at exon 12 of the ALDH2 gene causes a replacement of glutamate with lysine at residue 487, resulting in the ALDH2K enzyme. [8]
ALDH1a2 belongs to the aldehyde dehydrogenase family of proteins, and specifically the ALDH1 family. The product of this gene, ALDH1a2, is an enzyme that catalyzes the synthesis of all-trans retinoic acid (RA) from retinaldehyde in a NAD-dependent manner. [7]
People have various ALDH2 alleles. ALDH2*1 is a common allele , but about 40% of people of East Asian ethnicity have one or two copies of the dominant ALDH2*2 instead, which causes ALDH2 deficiency. If deficient people drink ethanol, they suffer from alcohol flush reaction due to acetaldehyde accumulation. [3] Four Alda-1 molecules bind to each ...
Aldehyde dehydrogenase 1 family, member L2 also known as ALDH1L2 is an enzyme that in humans is encoded by the ALDH1L2 gene. [ 5 ] [ 6 ] ALDH1L2 is the mitochondrial isoform of a similar enzyme, ALDH1L1 , which converts 10-formyltetrahydrofolate to tetrahydrofolate and carbon dioxide.
Delta-1-pyrroline-5-carboxylate dehydrogenase, mitochondrial is an enzyme that in humans is encoded by the ALDH4A1 gene. [ 5 ] [ 6 ] This protein belongs to the aldehyde dehydrogenase family of proteins.
ALDH3A2 catalyzes the oxidation of long-chain aliphatic aldehydes into fatty acids. It is known to act on a variety of both saturated and unsaturated aliphatic aldehydes between 6 and 24 carbons in length, as well as dihydrophytal, a 20-carbon branched chain aldehyde. [6]