A genetic and structural analysis of the -glycosylation capabilities

A genetic and structural analysis of the -glycosylation capabilities The recent draft sequencing of the rice (Oryza sativa) genome has enabled a genetic analysis of the glycosylation capabilities of an agroeconomically important group of plants, the monocotyledons. In this study, we have not only identified genes putatively encoding enzymes involved in N-glycosylation, but have examined by MALDI-TOF MS the structures of the N-glycans of rice and other monocotyledons (maize, wheat and dates; Zea mays, Triticum aestivum and Phoenix dactylifera); these data show that within the plant kingdom the types of N-glycans found are very similar between monocotyledons, dicotyledons and gymnosperms. Subsequently, we constructed expression vectors for the key enzymes forming plant-typical structures in rice, N-acetylglucosaminyltransferase I (GlcNAc-TI; EC 2.4.1.101), core α1,3-fucosyltransferase (FucTA; EC 2.4.1.214) and β1,2-xylosyltransferase (EC 2.4.2.38) and successfully expressed them in Pichia pastoris. Rice GlcNAc-TI, FucTA and xylosyltransferase are therefore the first monocotyledon glycosyltransferases involved in N-glycan biosynthesis to be characterised in a recombinant form. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Molecular Biology Springer Journals

A genetic and structural analysis of the -glycosylation capabilities

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Publisher
Springer Journals
Copyright
Copyright © 2004 by Kluwer Academic Publishers
Subject
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
ISSN
0167-4412
eISSN
1573-5028
D.O.I.
10.1007/s11103-004-1558-3
Publisher site
See Article on Publisher Site

Abstract

The recent draft sequencing of the rice (Oryza sativa) genome has enabled a genetic analysis of the glycosylation capabilities of an agroeconomically important group of plants, the monocotyledons. In this study, we have not only identified genes putatively encoding enzymes involved in N-glycosylation, but have examined by MALDI-TOF MS the structures of the N-glycans of rice and other monocotyledons (maize, wheat and dates; Zea mays, Triticum aestivum and Phoenix dactylifera); these data show that within the plant kingdom the types of N-glycans found are very similar between monocotyledons, dicotyledons and gymnosperms. Subsequently, we constructed expression vectors for the key enzymes forming plant-typical structures in rice, N-acetylglucosaminyltransferase I (GlcNAc-TI; EC 2.4.1.101), core α1,3-fucosyltransferase (FucTA; EC 2.4.1.214) and β1,2-xylosyltransferase (EC 2.4.2.38) and successfully expressed them in Pichia pastoris. Rice GlcNAc-TI, FucTA and xylosyltransferase are therefore the first monocotyledon glycosyltransferases involved in N-glycan biosynthesis to be characterised in a recombinant form.

Journal

Plant Molecular BiologySpringer Journals

Published: Dec 30, 2004

References

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