Conformational features of galacturonans. II. Configurational statistics of pectic polymers

The unperturbed dimensions of poly-α- d-galacturonic acid (PGA) as a function of the degree of polymerization (n) and degree of ionization (%GalA -) have been determined by molecular mechanics and Monte Carlo methods. Chain extensions appear to depend substantially on contributions arising from loca...

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Bibliographic Details
Published inInternational journal of biological macromolecules Vol. 17; no. 3; pp. 213 - 218
Main Authors Ruggiero, JoséRoberto, Urbani, Ranieri, Cesàro, Attilio
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 1995
Subjects
Carbohydrate Conformation
configurational statistics
galacturonans
Glycosides
Monte Carlo Method
pectin
Pectins - chemistry
Structure-Activity Relationship
configurational statistics
galacturonans
pectin
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Summary:The unperturbed dimensions of poly-α- d-galacturonic acid (PGA) as a function of the degree of polymerization (n) and degree of ionization (%GalA -) have been determined by molecular mechanics and Monte Carlo methods. Chain extensions appear to depend substantially on contributions arising from local redistributions of charge on charged and uncharged galacturonic acid residues. Inclusion of methyl-esterified galacturonic acid units results in increased chain extensions. Incorporation of α-(1 → 2)- l-rhamnose units causes abrupt changes in chain propagation and a reduction in calculated chain extension.
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ISSN:0141-8130
1879-0003
DOI:10.1016/0141-8130(95)92688-M