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Identification of β1,3-galactosyltransferases responsible for biosynthesis of insect complex-type N-glycans containing a T-antigen unit in the honeybee

Honeybees ( Apis mellifera ) produce unique complex-type N -glycans bearing a Galβ1-3GalNAc (T-antigen) unit, and honeybee-specific N -glycans are linked to royal jelly glycoproteins. In this study, we identified two novel honeybee β1,3-galactosyltransferase ( β1,3-GalT ) genes responsible for biosy...

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Published in:Glycoconjugate journal 2015-05, Vol.32 (3-4), p.141-151
Main Authors: Ichimiya, Tomomi, Maeda, Megumi, Sakamura, Shou, Kanazawa, Masato, Nishihara, Shoko, Kimura, Yoshinobu
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cited_by cdi_FETCH-LOGICAL-c3297-260729a8eba9aea92e34a41f527b24e4a9d25beb8780b9e6bb94a634dd5809ba3
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container_title Glycoconjugate journal
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creator Ichimiya, Tomomi
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description Honeybees ( Apis mellifera ) produce unique complex-type N -glycans bearing a Galβ1-3GalNAc (T-antigen) unit, and honeybee-specific N -glycans are linked to royal jelly glycoproteins. In this study, we identified two novel honeybee β1,3-galactosyltransferase ( β1,3-GalT ) genes responsible for biosynthesis of the T-antigen in insect N -glycans. The products of the two putative β1,3-GalT genes (β1,3-GalT1 and β1,3-GalT2 ), which were expressed in Sf21 insect cells, transferred galactose (Gal) residues to GalNAc2GlcNAc2Man3GlcNAc2-PA to form the Galβ1-3GalNAc unit, indicating that the identified genes were involved in biosynthesis of the β1-3 Gal-containing N -glycan. Therefore, using biochemistry and molecular biology techniques, we revealed a unique N -glycan biosynthesis mechanism in the cephalic region of honeybees, which has not previously been found in other animal or plant cells.
doi_str_mv 10.1007/s10719-015-9585-7
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source Springer Nature
subjects Amino Acid Sequence
Animals
Antigens, Viral, Tumor - metabolism
Bees - enzymology
Bees - genetics
Biochemistry
Biomedical and Life Sciences
Carbohydrate Conformation
Carbohydrate Sequence
Cloning, Molecular
Drosophila Proteins - chemistry
Galactose - metabolism
Galactosyltransferases - genetics
Galactosyltransferases - metabolism
Insect Proteins - genetics
Insect Proteins - metabolism
Life Sciences
Molecular Sequence Data
Original Article
Pathology
Polysaccharides - biosynthesis
Polysaccharides - chemistry
Sequence Homology, Amino Acid
title Identification of β1,3-galactosyltransferases responsible for biosynthesis of insect complex-type N-glycans containing a T-antigen unit in the honeybee
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