Free N-glycans already occur at an early stage of seed development.

Free N-glycans already occur at an early stage of seed development. Research Abstract Details 

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Free N-glycans already occur at an early stage of seed development. Abstract Text:

Y Kimura,S Matsuo,

As a part of our studies to elucidate the physiological significance of free N-glycans in differentiating or growing plant cells, we first demonstrate that two kinds of free N-glycans already occur at an early stage of seed development. In this report, we used the developing Ginkgo biloba seeds as a model plant, since we have already revealed a functional feature of the Ginkgo endo-beta-N-acetylglucosaminidase and structural features of N-glycans linked to storage glycoproteins in the developing seeds [Kimura, Y. et al. (1998) Biosci. Biotechnol. Biochem. 62, 253-261; Kimura, Y. and Matsuo, S. (2000) Biosci. Biotechnol. Biochem. 64, 562-568]. The structures of free N-glycans, which were determined by a combination of ESI-MS, sequential a-mannosidase digestions, partial acetolysis, and two dimensional sugar chain map, fell into two categories. One dominant species is a high-mannose type structure having one GlcNAc residue at the reducing end (Man(9-5)GlcNAc(1)). The concentration of this type of free glycan (as the pyridylaminated derivatives) is about 2.2 nmol in 1 g fresh weight. The detailed structural analysis revealed that the high-mannose type structures have a common core unit; Manalpha1-6(Man1-3)Manalpha1-6(Manalpha1-3)Ma nbeta1-4GlcNAc. The other minor species of free N-glycans is the plant complex type structure having an N-acetylchitobiose unit at the reducing end (Man(3)Xyl(1)Fuc(1)GlcNAc(2)). The concentration of this type of free glycan (as the pyridylaminated derivative) was about 75 pmol in 1 g fresh weight.

Free N-glycans already occur at an early stage of seed development. Publishing Authors By Initials

Y Kimura,S Matsuo,

For similar carbohydrates: monosaccharides: pentoses: xylose research abstracts see: carbohydrates: monosaccharides: pentoses: xylose research

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Free N-glycans already occur at an early stage of seed development. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of biochemistry

VOLUME: 127

Page Numbers: 1013-9

Journal Abbreviation: J. Biochem.

ISSN: 0021-924X

DAY: 19

MONTH: Jun

YEAR: 2000

Free N-glycans already occur at an early stage of seed development. Information

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LANGUAGE: eng

NlmUniqueID: 376600

Free N-glycans already occur at an early stage of seed development. Keywords Mesh Terms:

KEYWORDS: Xylose

MESH TERMS: analysis

Chemical & Substance for Abstract: Free N-glycans already occur at an early stage of seed development. Information

Substance Name: Mannosidases

Registry Number: EC 3.2.1.-

Grant and Affiliation Information for Free N-glycans already occur at an early stage of seed development.

AFFILIATION: Department of Bioresources Chemistry, Faculty of Agriculture, Okayama University, Okayama 700-8530, Japan. yosh8mar@cc.okayama-u.ac.jp

Country: JAPAN

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MEDLINETA: J Biochem

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