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Indole-3-carbaldehyde (I3A), also known as indole-3-aldehyde and 3-formylindole, is a metabolite of dietary L-tryptophan which is synthesized by human gastrointestinal bacteria, particularly species of the Lactobacillus genus.
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 Indoles are derivatives of indole where one or more of the hydrogen atoms have been replaced by substituent groups.
Indole-3-carboxylate decarboxylase (EC 4.1.1.92) is an enzyme with systematic name indole-3-carboxylate carboxy-lyase. [1] This enzyme catalyses the following chemical reaction. indole-3-carboxylate indole + CO 2. This enzyme is activated by Zn 2+, Mn 2+ or Mg 2+.
The first one consists of the degradation of the amino acid into indole-3-acetate. And in the second step, IAD catalyzes the decarboxylation of the indole-3-acetate to form the final product, skatole. The decarboxylation of indole-3-acetate is chemically difficult since it leaves an unstable carbanion because of the direct elimination of CO 2.
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.
The Ehrlich reagent is similar to a number of other indole tests: The van Urk reagent, which uses 0.125 g of p-DMAB, 0.2 mL of ferric chloride solution (25 mg/mL) in 100 mL of 65% sulfuric acid. [9] [10] [11] This is sometimes referred to as the Hofmann reagent or p-DMAB-TS (Test Solution) and gives slightly different colours with different ...
Indole-3-acetaldehyde (IAL) belongs to the class of organic compounds known as indoles. These are compounds containing an indole moiety, which consists of pyrrole ring fused to benzene to form 2,3-benzopyrrole. It is a metabolite of tryptamine formed by monoamine oxidase (MAO).
The systematic name of this enzyme class is 1-(2-carboxyphenylamino)-1-deoxy-D-ribulose-5-phosphate carboxy-lyase [cyclizing 1-C-(indol-3-yl)glycerol-3-phosphate-forming]. Other names in common use include indoleglycerol phosphate synthetase , indoleglycerol phosphate synthase , indole-3-glycerophosphate synthase , 1-(2-carboxyphenylamino)-1 ...