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Action of Trichoderma reesei mannanase on galactoglucomannan in pine kraft pulp
Journal of biotechnology, 1997-09, Vol.57 (1), p.191-204
[Peer Reviewed Journal]
1997 ;ISSN: 0168-1656 ;EISSN: 1873-4863 ;DOI: 10.1016/S0168-1656(97)00099-0 ;PMID: 9335173
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Title:
Action of Trichoderma reesei mannanase on galactoglucomannan in pine kraft pulp
Author:
Tenkanen, Maija
;
Makkonen, Mari
;
Perttula, Marjukka
;
Viikari, Liisa
;
Teleman, Anita
Subjects:
Activated carbon
;
beta-Mannosidase
;
Biotechnology
;
Endomannanase
;
Fractionation
;
Glucose
;
Hydrolysis
;
Hypocrea jecorina
;
Ion exchange
;
Kraft pulp
;
Magnetic Resonance Spectroscopy
;
Mannans - metabolism
;
Manno-oligosaccharides
;
Mannosidases - metabolism
;
Molecular structure
;
NMR spectroscopy
;
Nuclear magnetic resonance spectroscopy
;
Oligosaccharides - metabolism
;
Pine kraft pulp
;
Pinus
;
Polysaccharides
;
Size exclusion chromatography
;
Trichoderma - enzymology
;
Trichoderma reesei
;
wood pulp
Is Part Of:
Journal of biotechnology, 1997-09, Vol.57 (1), p.191-204
Description:
The di-, tri- and tetrasaccharides formed during Trichoderma reesei endo-β- d-mannanase treatment of pine kraft pulp were studied. The oligosaccharides in the hydrolysate were fractionated using size-exclusion, anion exchange and activated carbon chromatography. The primary sequence of the purified oligomers was determined by two-dimensional NMR techniques. The T. reesei mannanase cleaves the β-1,4-glycosidic linkage of d-mannosyl residues attached either to d-mannose or d-glucose. The d-mannosyl residue may also be substituted by a d-galactosyl group. The main disaccharide produced was mannobiose, but a significant amount of 4- O- β- d-glucopyranosyl- d-mannopyranose (GlcMan) was also produced. After extensive hydrolysis the main trisaccharides produced were 4- O- β- d-mannopyranosyl-[6-O-α-galactopyranosyl]- d-mannopyranose (Gal 1Man 2) and 4- O- β- d-glucopyranosyl-4-O-β- d-glucopyranosyl- d-mannopyranose (Glc 2Man). Some mannotriose 4- O- β- d-glucopyranosyl-4-O-β- d-mannopyranosyl1- d-mannopyranose (GlcMan 2) and 4- O- β- d-glucopyranosyl-[6-O-α-galactopyranosyl]- d-mannopyranose (Gal 1GlcMan) were also detected in the hydrolysate. The structures of two tetrasaccharides were studied. They appeared to be 4- O- β- d-glucopyranosyl-4-O-β- d-glucopyranosyl-4-O-β- d-glucopyranosyl- d-mannopyranose (Glc 3Man) and 4- O- gb- d-glucopyranosyl-4-O-β- d-mannopyranosyl-4-O-β- d-glucopyranosyl- d-mannopyranose (GlcManGlcMan). According to the results obtained, the galactoglucomannan in pine contains regions in which two or three glucose units are linked together, which further means that it may contain regions with several successive mannose residues. The galactose side groups were found to be attached only to mannose.
Publisher:
Netherlands: Elsevier B.V
Language:
English
Identifier:
ISSN: 0168-1656
EISSN: 1873-4863
DOI: 10.1016/S0168-1656(97)00099-0
PMID: 9335173
Source:
MEDLINE
Alma/SFX Local Collection
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