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Updated: Jul 19, 2026

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Glycan Profiling of Plant Cell Wall Polymers using Microarrays
Published on: December 17, 2012
植物における病原体反応の構造依存的調節は,合成O-抗原ポリサッカライドによって行われます
Emiliano Bedini1, Cristina De Castro, Gitte Erbs
1Dipartimento di Chimica Organica e Biochimica Complesso, Universitario Monte Sant'Angelo, Via Cintia 4, 80126, Napoli, Italy.
Journal of the American Chemical Society
|February 24, 2005
まとめ
植物病原性細菌から派生したオリゴサッカライド.
科学分野:
- 植物病理学 植物病理学
- 微生物学 微生物学とは
- 炭水化物の化学反応
背景:
- 植物病原菌はしばしば,特定のO鎖の繰り返し単位を持つリポポリサッカリド (LPS) を有する.
- これらの構造を理解することは,植物の防御機構にとって極めて重要です.
研究 の 目的:
- バクテリアのLPS O鎖を模倣したオリゴサッカライドを合成および分析する.
- 植物免疫反応におけるそれらの役割を調査する.
主な方法:
- トリサカリド単体の化学合成と,ヘキサカリドおよびノンサカリドへのオリゴメリゼーション.
- 構造分析のためのNMRスペクトロシーと分子ダイナミクス.
- アラビドプシス・サリアナにおける過敏反応 (HR) 抑制とPR-1遺伝子発現の測定.
主要な成果:
- 合成されたオリゴラムナンは,HRを効果的に抑制し,PR-1遺伝子発現を誘発した.
- 形状分析により,より長いオリゴサッカライドの渦巻き構造が明らかになった.
- 免疫応答の調節における有効性は,巻き構造の形成と相関する.
結論:
- これらのオリゴサッカリドの巻いた構造は,植物で認識可能な病原体関連分子パターン (PAMP) として作用します.
- この発見は,細菌と植物の相互作用と免疫シグナル伝達に関する洞察を提供します.
関連する概念動画
Defenses Against Pathogens and Herbivores
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Protein Glycosylation
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Glycosylation occurs in...
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Protein glycosylation starts in the ER lumen and continues in the Golgi apparatus. Glycosyltransferases catalyze the addition of sugar molecules or glycosylation of proteins. Usually, these enzymes add sugars to the hydroxyl groups of selected serine or threonine residues to form O-linked glycans or the amino groups of asparagine residues to form N-linked glycans. Different positions on the same polypeptide chain can contain differently linked glycans.
Multiple sugar molecules that may or may...
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Insulin: Biosynthesis, Chemistry, and Preparation
The endoplasmic reticulum (ER) of pancreatic β-cells synthesizes preproinsulin, which consists of a signal peptide, A and B chains, and a C-peptide. Preproinsulin is then cleaved and folded into proinsulin, which translocates to the Golgi apparatus for sorting and packaging into secretory granules. In these granules, enzymatic clipping generates insulin and C-peptide.
Damage or functional impairment of β-cells inhibits insulin production, leading to diabetes. Diabetes treatment primarily uses...
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Biosynthesis of Polysaccharides
Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...

