Galacturonic Acid

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galacturonic acid

[gə¦lakt·yə¦rän·ik ′as·əd]
The monobasic acid resulting from oxidation of the primary alcohol group ofD-galactose to carboxyl; it is widely distributed as a constituent of pectins and many plant gums and mucilages.

Galacturonic Acid


(also called hexuronic acid), formed in organisms by oxidation of the primary hydroxyl of galactose to a carboxyl group. The presence of aldehyde, hydroxyl, and carboxyl groups makes galacturonic acid a polyfunctional compound.

Galacturonic acid is widespread in nature and is a structural component of a number of higher polysaccharides. Together with other uronic acids, it forms readily in plant tissues and is a component of gums, mucilages, and other substances. Pectins are esters of macromolecular polygalacturonic acids. Under the action of the enzyme decarboxylase in plants, galacturonic acid changes into arabinose.

References in periodicals archive ?
Kuivanen J ; Mojzita D ; Wang Y ; Hilditch S ; Penttila M ; Richard P ; Wiebe MG : Engineering Filamentous Fungi for Conversion of d-Galacturonic Acid to l-Galactonic Acid, ApplEnviron Microbiol, 2012, 24, 8676-8683.
2006a), a pectin composed of D- galacturonic acid, L-rhamnose, D-galacturonic acid as methyl ester and O-acetyl groups (Shimizu and Tomoda, 1983), cyclopeptides (Barboni et al.
The second fraction was a pectic polysaccharide composed of 2,4-linked and 2-linked L-rhamnose, 6-linked D-galactose, a terminal non-reducing D-glucuronic acid and 4-linked D-galacturonic acid [52].