The influence of sialic acid residues on the ability of glycoproteins toi nteract electrostatically with chondromucoprotein
- 1 November 1965
- journal article
- research article
- Published by Portland Press Ltd. in Biochemical Journal
- Vol. 97 (2), 333-339
- https://doi.org/10.1042/bj0970333
Abstract
Although glycoproteins with less than 1% of sialic acid (fibrinogen, lipoproteins, y-globulins) interact electrostatically with chondromucoprotein to form insoluble complexes, interaction with glycoproteins containing larger amounts of sialic acid (orosomucoid, urine glycoprotein, seromucoid, fraction VI) was electrostatically impossible. Reasons for this are discussed. The latter glycoproteins interacted with chondromucoprotein after mild acid hydrolysis or neuraminidase treatment, complex-formation being inversely related to their sialic acid content. Complex-formation with sialic acid-deficient orosomucoid was maximum at pH 3-6 and negligible above its isoelectric point of pH 5, and was inhibited by calcium ions and EDTA. These results are discussed in relation to the carbohydrate composition and biological activities of euglobulin fractions, and of complexes formed by adding chondromucoprotein to abnormal plasmas which may contain sialic acid-deficient glycoproteins owing to faulty carbohydrate metabolism.This publication has 14 references indexed in Scilit:
- Chromatography of sulphosalicylic acid-soluble substances from normal human serumClinica Chimica Acta; International Journal of Clinical Chemistry, 1964
- FORMATION COMPOSITION + FIBRINOLYTIC POTENTIAL OF CHONDROMUCOPROTEIN-FIBRINOGEN + CHONDROMUCOPROTEIN-LIPOPROTEIN COMPLEXES IN HUMAN EUGLOBULIN FRACTIONS1964
- THE FORMATION OF CHONDROMUCOPROTEIN-FIBRINOGEN AND CHONDROMUCOPROTEIN-β-LIPOPROTEIN COMPLEXESBiochemical Journal, 1963
- Some studies on the relationship between sialic acid and the mucopolysaccharide-protein complexes in human cartilageBiochemical Journal, 1962
- The precipitation of polyanions by long-chain aliphatic ammonium salts. 5. The influence on precipitation of changes in the amine structureBiochemical Journal, 1961
- Action of Neuraminidase on HaptoglobinNature, 1961
- Purification and Properties of Neuraminidase from Vibrio choleraeJournal of General Microbiology, 1961
- Stimulation of the Production of Neuraminidase in Vibrio cholerae Cultures by N-Acetylneuraminic Acid and Sialyl-LactoseJournal of General Microbiology, 1959
- The nature of the link between protein and carbohydrate of a chondroitin sulphate complex from hyaline cartilageBiochemical Journal, 1958
- THE ACTION OF AN ENZYME OF CLOSTRIDIUM PERFRINGENS ON OROSOMUCOIDJournal of Biological Chemistry, 1957