Structural and immunological properties of arabinogalactan polysaccharides from pollen of timothy grass (Phleum pratense L.).
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Structural and immunological properties of arabinogalactan polysaccharides from pollen of timothy grass (Phleum pratense L.). / Brecker, Lothar; Wicklein, Daniel; Moll, Hermann; Fuchs, Elmar C; Becker, Wolf-Meinhard; Petersen, Arnd.
in: CARBOHYD RES, Jahrgang 340, Nr. 4, 4, 2005, S. 657-663.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Structural and immunological properties of arabinogalactan polysaccharides from pollen of timothy grass (Phleum pratense L.).
AU - Brecker, Lothar
AU - Wicklein, Daniel
AU - Moll, Hermann
AU - Fuchs, Elmar C
AU - Becker, Wolf-Meinhard
AU - Petersen, Arnd
PY - 2005
Y1 - 2005
N2 - Extracts from pollen of timothy grass (Phleum pratense L.) contain up to 20% arabinogalactan proteins (AGPs). Separation of the AGP polysaccharide moieties by tryptic digestion, size exclusion chromatography (GPC), and reverse phase HPLC yielded arabinogalactan fractions AG-1 and AG-2 with molecular weights of approximately 15,000 and approximately 60,000Da, respectively. The backbones of both polysaccharides are composed of (1-->6)-linked beta-D-galactopyranosides with beta-D-GlcUAp or 4-O-Me-beta-D-GlcUAp at their terminal ends as revealed by chemical analysis, FT-IR, MALDI-MS, and NMR spectroscopy. AG-1 contains a small number of beta-l-Araf side chains while AG-2 possesses a variety of (1-->3)-linked units, which consist of beta-l-Araf-(1-->, alpha-l-Araf-(1-->3)-beta-l-Araf-(1-->, and alpha-l-Araf-(1-->5)-beta-l-Araf-(1--> as well as a small number of longer arabinogalactan side chains. In contrast to crude pollen extracts, the immunological properties of the arabinogalactan mixture reveal an IgG4 reactivity instead of IgE reactivity. Structural properties of timothy pollen arabinogalactan might thus influence the immune response.
AB - Extracts from pollen of timothy grass (Phleum pratense L.) contain up to 20% arabinogalactan proteins (AGPs). Separation of the AGP polysaccharide moieties by tryptic digestion, size exclusion chromatography (GPC), and reverse phase HPLC yielded arabinogalactan fractions AG-1 and AG-2 with molecular weights of approximately 15,000 and approximately 60,000Da, respectively. The backbones of both polysaccharides are composed of (1-->6)-linked beta-D-galactopyranosides with beta-D-GlcUAp or 4-O-Me-beta-D-GlcUAp at their terminal ends as revealed by chemical analysis, FT-IR, MALDI-MS, and NMR spectroscopy. AG-1 contains a small number of beta-l-Araf side chains while AG-2 possesses a variety of (1-->3)-linked units, which consist of beta-l-Araf-(1-->, alpha-l-Araf-(1-->3)-beta-l-Araf-(1-->, and alpha-l-Araf-(1-->5)-beta-l-Araf-(1--> as well as a small number of longer arabinogalactan side chains. In contrast to crude pollen extracts, the immunological properties of the arabinogalactan mixture reveal an IgG4 reactivity instead of IgE reactivity. Structural properties of timothy pollen arabinogalactan might thus influence the immune response.
KW - Chromatography, High Pressure Liquid
KW - Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
KW - Molecular Structure
KW - Molecular Weight
KW - Mass Spectrometry
KW - Immunoglobulin G/immunology
KW - Allergens/immunology
KW - Carbohydrate Sequence
KW - Chromatography, Gel
KW - Galactans/chemistry/immunology
KW - Nuclear Magnetic Resonance, Biomolecular
KW - Phleum/immunology
KW - Pollen/immunology
KW - Polysaccharides, Bacterial/chemistry/immunology
KW - Spectroscopy, Fourier Transform Infrared
KW - Chromatography, High Pressure Liquid
KW - Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
KW - Molecular Structure
KW - Molecular Weight
KW - Mass Spectrometry
KW - Immunoglobulin G/immunology
KW - Allergens/immunology
KW - Carbohydrate Sequence
KW - Chromatography, Gel
KW - Galactans/chemistry/immunology
KW - Nuclear Magnetic Resonance, Biomolecular
KW - Phleum/immunology
KW - Pollen/immunology
KW - Polysaccharides, Bacterial/chemistry/immunology
KW - Spectroscopy, Fourier Transform Infrared
M3 - SCORING: Journal article
VL - 340
SP - 657
EP - 663
JO - CARBOHYD RES
JF - CARBOHYD RES
SN - 0008-6215
IS - 4
M1 - 4
ER -