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Title: Protein- and pH-dependent binding of nascent pectin and glucuronoarabinoxylan to xyloglucan in pea
Authors: Rizk, Sandra E.
Abdel-Massih, Roula
Baydoun, Elias A-H.
Brett, Cristopher T.
Affiliations: Department of Biology 
Keywords: Binding (pectin)
Subjects: Pectin
Issue Date: 2000
Part of: Planta
Volume: 211
Issue: 3
Start page: 423
End page: 429
Nascent pectin and glucuronoarabinoxylan, synthesised in vitro by membrane-bound enzymes from etiolated pea (Pisum sativum L.) epicotyls, were found to bind to pea xyloglucan in a pH-dependent manner. The binding was maximum at low pH (3–4), and decreased to almost zero at pH 6. The binding was probably non-covalent and reached saturation within 5 min. Removal of the fucose residues of xyloglucan decreased the degree of binding. Removal by protease of the proteins attached to nascent pectin and glucuronoarabinoxylan greatly reduced the maximum binding and abolished the pH-dependence. The observed binding may be of considerable significance in the process of cell-wall assembly and in the control of cell extension.
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Biology

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