Structural aspects of the interaction of mannan-based polysaccharides with bacterial cellulose

Whitney, Sarah E.C., Brigham, Jennie E., Darke, Arthur H., Reid, J.S.Grant and Gidley, Michael J. (1998) Structural aspects of the interaction of mannan-based polysaccharides with bacterial cellulose. Carbohydrate Research, 307 3-4: 299-309. doi:10.1016/S0008-6215(98)00004-4


Author Whitney, Sarah E.C.
Brigham, Jennie E.
Darke, Arthur H.
Reid, J.S.Grant
Gidley, Michael J.
Title Structural aspects of the interaction of mannan-based polysaccharides with bacterial cellulose
Journal name Carbohydrate Research   Check publisher's open access policy
ISSN 0008-6215
1873-426X
Publication date 1998-02
Sub-type Article (original research)
DOI 10.1016/S0008-6215(98)00004-4
Volume 307
Issue 3-4
Start page 299
End page 309
Total pages 11
Place of publication Oxford, United Kingdom
Publisher Pergamon
Language eng
Abstract Interactions between cellulose and glucomannan/galactomannans have been studied through molecular and ultrastructural analysis of composites formed by deposition of cellulose from Acetobacter aceti ssp. xylinum into solutions containing either glucomannan or galactomannans of varying Man:Gal ratio. 13C NMR suggests that unsubstituted mannan segments can bind to cellulose by undergoing a conformational transition to an extended 2-fold form. Konjac glucomannan induces a coalescence of cellulose fibrils and a dramatic reduction of crystallinity: low galactose galactomannans also show these trends. The inferred mannan/cellulose sandwich structure may underlie the densification processes which can accompany mannan-containing secondary cell wall formation. Medium galactose galactomannans additionally form cross- links of varying lengths between cellulose fibrils and show evidence for self-association. The presence of cellulose fibrils promotes network formation from galactomannan solutions under conditions where this would not normally occur. The principles of interaction between cellulose and mannan- based polymers at both molecular and ultrastructural levels are discussed in the context of plant cell wall design and assembly. Interactions between cellulose and glucomannan/galactomannans have been studied through molecular and ultrastructural analysis of composites formed by deposition of cellulose from Acetobacter aceti ssp. xylinum into solutions containing either glucomannan or galactomanannans of varying Man:Gal ratio. 13C NMR suggests that unsubstituted mannan segments can bind to cellulose by undergoing a conformational transition to an extended 2-fold form. Konjac glucomannan induces a coalescence of cellulose fibrils and a dramatic reduction of crystallinity: low galactose galactomannans also show these trends. The inferred mannan/cellulose sandwich structure may underlie the densification processes which can accompany mannan-containing secondary cell wall formation. Medium galactose galactomannans additionally form cross-links of varying lengths between cellulose fibrils and show evidence for self-association. The presence of cellulose fibrils promotes network formation from galactomannan solutions under conditions where this would not normally occur. The principles of interaction between cellulose and mannan-based polymers at both molecular and ultrastructural levels are discussed in the context of plant cell wall design and assembly.
Keyword Cellulose/mannan interactions
Glucomannan
Galactomannan
Acetobacter aceti
Plant cell wall assembly
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Nutrition and Food Sciences Publications
 
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