相关实验视频
Updated: Jun 14, 2025

08:43
OLIgo Mass Profiling OLIMP of Extracellular Polysaccharides
Published on: June 20, 2010
13.7K
植物细胞壁中的多糖O-乙转移酶
Ruiqin Zhong1, Dayong Zhou2, Lirong Chen2
1Department of Plant Biology, University of Georgia, Athens, GA 30602, USA.
Plants (Basel, Switzerland)
|August 29, 2024
概括
植物细胞壁O-乙化对于组装和防御至关重要,由TBL/DUF231O-乙转移酶进行. 了解这些酶为植物生物学和潜在的生物燃料应用提供了洞察力.
科学领域:
- 植物生物学 植物生物学
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 植物细胞壁是复杂的结构,主要由多糖聚合物组成.
- 关键的多糖类如西洛格卢干,西兰,曼南和pectins经历O-乙化.
- 聚糖O-乙化对于细胞壁组装和植物抗病能力至关重要.
研究的目的:
- 为提供O-乙化细胞壁多糖的全面概述.
- 详细介绍O-乙转移酶的生物化学性质,结构特征和演变.
- 探索操纵细胞壁乙化的潜在生物技术应用.
主要方法:
- 用遗传和生物化学分析来确定参与O-乙化过程的关键蛋白家族.
- 文献综述和对O-乙转移酶家族的比较分析 (TBL/DUF231,RWA,AXY9).
- 检查O-乙化多糖的发生和功能.
主要成果:
- 三合体双断样 (TBL) /未知功能的域231 (DUF231) 蛋白质家族作为O-乙转移酶作用于西糖,西兰,曼南和pectins.
- 虽然减少壁乙化 (RWA) 和改变的糖9 (AXY9) 蛋白质的作用仍在调查中,但TBL/DUF231蛋白质已被证实为O-乙转移酶.
- O-乙化是植物细胞壁的广泛修饰,具有重要的功能影响.
结论:
- TBL/DUF231蛋白质是主要的O-乙转移酶,负责修改各种植物细胞壁多糖.
- 对O-乙化机制的进一步研究将提高对细胞壁生物学的理解.
- 操纵细胞壁乙化对设计抗病能力和提高生物燃料生产效率充满希望.
相关概念视频
Cell Adhesion in Plants
2.6K
Plants have rigid cell walls that are made up of cell wall polysaccharides that mediate cell-cell adhesion. The primary cell walls of plants consist of two independent and interacting polysaccharide networks: a pectin matrix that embeds the second network comprising cellulose and hemicelluloses.
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose,...
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose,...
2.6K
Cellulose and Pectic Polysaccharides
3.5K
Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth. Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the...
As a cell matures, its cell wall specializes according to its type. For example, the...
3.5K
Role of Microtubules in Cell Wall Deposition
2.4K
Microtubules are small hollow tubes in eukaryotic cells. The cell wall microtubules are polymerized dimers of two globular proteins, α-tubulin and β-tubulin, two globular proteins. With a diameter of about 25 nm, microtubules are the widest components of the cytoskeleton. They help the cell resist compression and provide a track along which vesicles move through the cell or pull replicated chromosomes to opposite ends of a dividing cell. Microtubules go through quick cycles of...
2.4K
Plant Cell Wall
56.4K
The plant cell wall gives plant cells shape, support, and protection. As a cell matures, its cell wall specializes according to the cell type. For example, the parenchyma cells of leaves possess only a thin, primary cell wall.
56.4K
Oligosaccharide Assembly
2.8K
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...
Multiple sugar molecules that may or may...
2.8K
Chemistry of Carbohydrates
72.1K
Carbohydrates are an essential part of the diet in humans and animals. Grains, fruits, and vegetables are natural sources of carbohydrates that provide energy to the body, particularly through glucose, a simple sugar that is a component of starch and an ingredient in many staple foods. The stoichiometric formula (CH2O)n, where n is the number of carbons in the molecule represents carbohydrates. In other words, the ratio of carbon to hydrogen to oxygen is 1:2:1 in carbohydrate molecules. This...
72.1K

