title: Protein homeostasis defects of alanine-glyoxylate aminotransferase: new therapeutic strategies in primary hyperoxaluria type I.
abstract: Alanine-glyoxylate aminotransferase catalyzes the transamination between L-alanine and glyoxylate to produce pyruvate and glycine using pyridoxal 5'-phosphate (PLP) as cofactor. Human alanine-glyoxylate aminotransferase is a peroxisomal enzyme expressed in the hepatocytes, the main site of glyoxylate detoxification. Its deficit causes primary hyperoxaluria type I, a rare but severe inborn error of metabolism. Single amino acid changes are the main type of mutation causing this disease, and considerable effort has been dedicated to the understanding of the molecular consequences of such missense mutations. In this review, we summarize the role of protein homeostasis in the basic mechanisms of primary hyperoxaluria. Intrinsic physicochemical properties of polypeptide chains such as thermodynamic stability, folding, unfolding, and misfolding rates as well as the interaction of different folding states with protein homeostasis networks are essential to understand this disease. The view presented has important implications for the development of new therapeutic strategies based on targeting specific elements of alanine-glyoxylate aminotransferase homeostasis.
authors: Departamento de Química-Física, Facultad de Ciencias, Universidad de Granada, Avenida Fuentenueva s/n, 18071 Granada, Spain.
authors: Angel L
authors: AL
authors: Pey
authors: Armando
authors: A
authors: Albert
authors: Eduardo
authors: E
authors: Salido
mesh_terms: D005998:Glycine / Q000378:metabolism; D022781:Hepatocytes / Q000201:enzymology; D006706:Homeostasis; D006801:Humans; D006960:Hyperoxaluria, Primary / Q000201:enzymology / Q000235:genetics* / Q000473:pathology; D009154:Mutation; D017510:Protein Folding; D058767:Protein Unfolding; D000637:Transaminases / Q000737:chemistry* / Q000235:genetics* / Q000378:metabolism
chemical_list: D000637:Transaminases; C019635:Alanine-glyoxylate transaminase; D005998:Glycine
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