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Structure of arabinogalactan oligosaccharides derived from arabinogalactan-protein of Coffea arabica instant coffee powder.

Identifieur interne : 000501 ( Main/Curation ); précédent : 000500; suivant : 000502

Structure of arabinogalactan oligosaccharides derived from arabinogalactan-protein of Coffea arabica instant coffee powder.

Auteurs : Mária Matulová [Slovaquie] ; Peter Capek ; Satoshi Kaneko ; Luciano Navarini ; Furio Suggi Liverani

Source :

RBID : pubmed:21497798

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English descriptors

Abstract

Arabinogalactan-protein, previously isolated from instant coffee powder of Coffea arabica, has been subjected to partial mild acidic and enzymatic hydrolyses. Separation of obtained mixtures by size exclusion and HPLC chromatographies afforded series of oligosaccharides, structure of which were studied by NMR spectroscopy. Mild acidic hydrolysis afforded oligosaccharides without any αAraf substituent while after enzymatic hydrolysis αAraf was found in di-, tri-, and tetrasaccharides. In all cases αAraf was a terminal substituent linked separately to O3, O6, and to both, O3 and O6, of βGal residues. Identification of di-, tri-, and tetrasaccharides containing α-Araf enabled to distinguish in the (1)H NMR spectra αAraf signals linked to O6 and O3 of neighboring βGal unit. Composition of polymeric residues after enzymatic and mild acidic hydrolyses was also analyzed.

DOI: 10.1016/j.carres.2011.03.016
PubMed: 21497798

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pubmed:21497798

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<nlm:affiliation>Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, 845 38 Bratislava, Slovakia. Maria.Matulova@savba.sk</nlm:affiliation>
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<name sortKey="Capek, Peter" sort="Capek, Peter" uniqKey="Capek P" first="Peter" last="Capek">Peter Capek</name>
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<name sortKey="Kaneko, Satoshi" sort="Kaneko, Satoshi" uniqKey="Kaneko S" first="Satoshi" last="Kaneko">Satoshi Kaneko</name>
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<name sortKey="Navarini, Luciano" sort="Navarini, Luciano" uniqKey="Navarini L" first="Luciano" last="Navarini">Luciano Navarini</name>
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<name sortKey="Liverani, Furio Suggi" sort="Liverani, Furio Suggi" uniqKey="Liverani F" first="Furio Suggi" last="Liverani">Furio Suggi Liverani</name>
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<term>Beverages (MeSH)</term>
<term>Carbohydrate Sequence (MeSH)</term>
<term>Coffea (chemistry)</term>
<term>Disaccharides (chemistry)</term>
<term>Disaccharides (metabolism)</term>
<term>Galactans (chemistry)</term>
<term>Glycoside Hydrolases (metabolism)</term>
<term>Hydrogen-Ion Concentration (MeSH)</term>
<term>Hydrolysis (MeSH)</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>Molecular Weight (MeSH)</term>
<term>Mucoproteins (chemistry)</term>
<term>Mucoproteins (metabolism)</term>
<term>Oligosaccharides (chemistry)</term>
<term>Oligosaccharides (isolation & purification)</term>
<term>Oligosaccharides (metabolism)</term>
<term>Phanerochaete (enzymology)</term>
<term>Plant Proteins (chemistry)</term>
<term>Plant Proteins (metabolism)</term>
<term>Powders (MeSH)</term>
<term>Protein Multimerization (MeSH)</term>
<term>Protein Structure, Quaternary (MeSH)</term>
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<keywords scheme="KwdFr" xml:lang="fr">
<term>Boissons (MeSH)</term>
<term>Coffea (composition chimique)</term>
<term>Concentration en ions d'hydrogène (MeSH)</term>
<term>Diholoside (composition chimique)</term>
<term>Diholoside (métabolisme)</term>
<term>Données de séquences moléculaires (MeSH)</term>
<term>Galactanes (composition chimique)</term>
<term>Glycosidases (métabolisme)</term>
<term>Hydrolyse (MeSH)</term>
<term>Masse moléculaire (MeSH)</term>
<term>Mucoprotéines (composition chimique)</term>
<term>Mucoprotéines (métabolisme)</term>
<term>Multimérisation de protéines (MeSH)</term>
<term>Oligosaccharides (composition chimique)</term>
<term>Oligosaccharides (isolement et purification)</term>
<term>Oligosaccharides (métabolisme)</term>
<term>Phanerochaete (enzymologie)</term>
<term>Poudres (MeSH)</term>
<term>Protéines végétales (composition chimique)</term>
<term>Protéines végétales (métabolisme)</term>
<term>Structure quaternaire des protéines (MeSH)</term>
<term>Séquence glucidique (MeSH)</term>
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<term>Disaccharides</term>
<term>Galactans</term>
<term>Mucoproteins</term>
<term>Oligosaccharides</term>
<term>Plant Proteins</term>
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<keywords scheme="MESH" qualifier="chemistry" xml:lang="en">
<term>Coffea</term>
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<keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr">
<term>Coffea</term>
<term>Diholoside</term>
<term>Galactanes</term>
<term>Mucoprotéines</term>
<term>Oligosaccharides</term>
<term>Protéines végétales</term>
</keywords>
<keywords scheme="MESH" qualifier="enzymologie" xml:lang="fr">
<term>Phanerochaete</term>
</keywords>
<keywords scheme="MESH" qualifier="enzymology" xml:lang="en">
<term>Phanerochaete</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="isolation & purification" xml:lang="en">
<term>Oligosaccharides</term>
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<keywords scheme="MESH" qualifier="isolement et purification" xml:lang="fr">
<term>Oligosaccharides</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en">
<term>Disaccharides</term>
<term>Glycoside Hydrolases</term>
<term>Mucoproteins</term>
<term>Oligosaccharides</term>
<term>Plant Proteins</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr">
<term>Diholoside</term>
<term>Glycosidases</term>
<term>Mucoprotéines</term>
<term>Oligosaccharides</term>
<term>Protéines végétales</term>
</keywords>
<keywords scheme="MESH" xml:lang="en">
<term>Beverages</term>
<term>Carbohydrate Sequence</term>
<term>Hydrogen-Ion Concentration</term>
<term>Hydrolysis</term>
<term>Molecular Sequence Data</term>
<term>Molecular Weight</term>
<term>Powders</term>
<term>Protein Multimerization</term>
<term>Protein Structure, Quaternary</term>
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<term>Boissons</term>
<term>Concentration en ions d'hydrogène</term>
<term>Données de séquences moléculaires</term>
<term>Hydrolyse</term>
<term>Masse moléculaire</term>
<term>Multimérisation de protéines</term>
<term>Poudres</term>
<term>Structure quaternaire des protéines</term>
<term>Séquence glucidique</term>
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<div type="abstract" xml:lang="en">Arabinogalactan-protein, previously isolated from instant coffee powder of Coffea arabica, has been subjected to partial mild acidic and enzymatic hydrolyses. Separation of obtained mixtures by size exclusion and HPLC chromatographies afforded series of oligosaccharides, structure of which were studied by NMR spectroscopy. Mild acidic hydrolysis afforded oligosaccharides without any αAraf substituent while after enzymatic hydrolysis αAraf was found in di-, tri-, and tetrasaccharides. In all cases αAraf was a terminal substituent linked separately to O3, O6, and to both, O3 and O6, of βGal residues. Identification of di-, tri-, and tetrasaccharides containing α-Araf enabled to distinguish in the (1)H NMR spectra αAraf signals linked to O6 and O3 of neighboring βGal unit. Composition of polymeric residues after enzymatic and mild acidic hydrolyses was also analyzed.</div>
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<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D004187">Disaccharides</NameOfSubstance>
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<Chemical>
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<Chemical>
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<NameOfSubstance UI="C063901">exo-beta-(1--3)-D-galactanase</NameOfSubstance>
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