Chemical Properties
light yellow to yellow-beige crystalline powder
Uses
3-Indoleacrylic acid has been used in the induction of ribokinase expression in
E. coli.
Definition
ChEBI: (E)-3-(indol-3-yl)acrylic acid is an alpha,beta-unsaturated monocarboxylic acid that is acrylic acid in which one of the hydrogens at position 3 is replaced by an indol-3-yl group. It is an alpha,beta-unsaturated monocarboxylic acid and a member of indoles. It is functionally related to an acrylic acid. It is a conjugate acid of an (E)-3-(indol-3-yl)acrylate(1-).
General Description
3-Indoleacrylic acid (IAA) is a chemical used for the induction of gene transcription. This expression system requires that the gene of interest is cloned in plasmids containing the trpE promoter.
Biochem/physiol Actions
3-Indoleacrylic acid helps to block the mycelial growth of?Neurospora crassa. As a result, the cells accumulate indoleglycerol phosphate, which influences the rate of tryptophan synthetase.
Purification Methods
Recrystallise the acid from AcOH, H2O or EtOAc/cyclohexane. UV in MeOH has at 225, 274 and 325nm. [Shaw et al. J Org Chem 23 1171 1958, constitution: Rappe Acta max Chem Scand 18 818 1964, Moffatt J Chem Soc 1442 1957, Kimming et al. Hoppe Seyler's Z Physiol Chem 371 234 1958, Beilstein 22 V 249.]
