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Lactobacillaceae (Lactobacillus s.l.) species metabolize tryptophan into indole-3-aldehyde (I3A) which acts on the aryl hydrocarbon receptor (AhR) in intestinal immune cells, in turn increasing interleukin-22 (IL-22) production. [2] Indole itself triggers the secretion of glucagon-like peptide-1 (GLP-1) in intestinal L cells and acts as a ...
Indole is an organic compound with the formula C 6 H 4 CCNH 3. Indole is classified as an aromatic heterocycle. It has a bicyclic structure, consisting of a six-membered benzene ring fused to a five-membered pyrrole ring. Indoles are derivatives of indole where one or more of the hydrogen atoms have been replaced by substituent groups.
In addition to the light- or H 2 O 2-induced formation of FICZ, a number of other enzymatic pathways have been identified to convert Trp to FICZ via the precursor I3A. [2] [3] Oxidative deamination of Trp by aromatic amino acid aminotransferases (ArAT) or L-amino oxidases (LAAO), one of which is the IL4-inducible enzyme IL4I1, converts Trp to indole-3-pyruvate, which after decarboxylation ...
The decarboxylation of indole-3-acetate is chemically difficult since it leaves an unstable carbanion because of the direct elimination of CO 2. This chemical reaction is promoted by 1-electron oxidation of indole-3-acetate through a proton-coupled electron transfer (PCET), which requires the transfer of the indolic-NH proton to a suitably ...
Indole alkaloids are distinguished depending on their biosynthesis. The two types of indole alkaloids are isoprenoids and non-isoprenoids. The latter include terpenoid structural elements, synthesized by living organisms from dimethylallyl pyrophosphate (DMAPP) and/or isopentenyl pyrophosphate (IPP): [8] Non-isoprenoid: Simple derivatives of indole
It is also available in dietary supplements. [3] Indole-3-carbinol is the subject of on-going biomedical research into its possible anticarcinogenic, [4] antioxidant, and anti-atherogenic effects. [5] Research on indole-3-carbinol has been conducted primarily using laboratory animals and cultured cells. [6]
The enzyme indolepyruvate decarboxylase (EC 4.1.1.74) catalyzes the chemical reaction. 3-(indol-3-yl)pyruvate 2-(indol-3-yl)acetaldehyde + CO 2. This enzyme belongs to the family of lyases, specifically the carboxy-lyases, which cleave carbon-carbon bonds.
β-Carboline (9H-pyrido[3,4-b]indole) represents the basic chemical structure for more than one hundred alkaloids and synthetic compounds. The effects of these substances depend on their respective substituent. Natural β-carbolines primarily influence brain functions but can also exhibit antioxidant [1] effects.