Indoleacetyl glutamine is indolic derivative of tryptophan. It is generated from indoleacetic acid. Indoleacetic acid (IAA) is a breakdown product of tryptophan metabolism and is often produced by the action of bacteria in the mammalian gut. Some endogenous production of IAA in mammalian tissues also occurs. It may be produced by the decarboxylation of tryptamine or the oxidative deamination of tryptophan. Indoleacetyl glutamine frequently occurs at low levels in urine and has been found in elevated levels in the urine of patients with hartnup disease, the characteristic symptoms of the disease are mental retardation and pellagra like skin rash. Several intestinal bacteria, such as Bacteroides, Clostridia, and E. coli, can catabolize Trp to tryptamine and indole pyruvic acid, which are then converted to indole-3-acetic acid, indole propionic acid, and indole lactic acid. Indole-3-acetic acid can be further combined with glutamine to produce indolyl acetyl glutamine in the liver or oxidized to indole-3-aldehyde (IAld) through peroxidase-catalyzed aerobic oxidation.

Metabolism and Physiological Effects of Indolelacetyl glutamine References