植物中的糖,多糖和假定的黄
1School of Agriculture, Food and Ecosystem Sciences, Faculty of Science, The University of Melbourne, Parkville, Victoria, Australia.
Comprehensive reviews in food science and food safety
|March 29, 2024
概括
(Se) 是一种对健康至关重要的微量营养素. 最近的研究突出了新的有机形式,如糖和多糖,提供更好的生物利用性和更低的毒性,对健康有益.
科学领域:
- 营养生物化学 营养生物化学
- 食品科学 食品科学 食品科学
- 毒理学 毒理学 毒理学
背景情况:
- (Se) 是对人类健康至关重要的重要微量营养素,支持抗氧化防御,并表现出抗炎,抗癌和器官保护作用.
- 的生物利用率和毒性高度依赖于其化学形式 (无机与有机),有机通常具有更高的生物利用率和更低的毒性.
- 之前的研究集中在Se的特异化,生物强化和生物化学活动上,但最近的发现揭示了食品中的新型有机Se化合物.
研究的目的:
- 审查和记录最近发现的糖和多糖作为有机的现有形式.
- 提出关于类黄酸盐存在的假定证据.
- 要突出这些食品衍生有机Se化合物的生物利用性,生物活性,组成,结构特征和结构-活性关系.
主要方法:
- 综合性文献综述,重点关注食品中物种化方面的最新发现.
- 对各种有机化合物的生物可用性和生物活性进行现有研究的分析.
- 检查新型有机形式的组成和结构特征.
主要成果:
- 证实糖和多糖是现有的有机形式.
- 提出支持黄存在的假定证据.
- 详细概述这些新发现的食品衍生有机化合物的生物可用性,生物活性和结构特征.
结论:
- 食品衍生的有机化合物,包括糖,多糖和潜在的黄,由于它们的有利生物可用性和生物活性,为健康提供了有前途的途径.
- 了解食物中的分类对于优化饮食摄入量和利用健康益处至关重要.
- 对这些新型有机Se形式的结构-活性关系进行进一步的研究是有必要的,以充分阐明它们的生理影响.
相关概念视频
Glucose Transporters
22.7K
Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
22.7K
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
Cellulose and Pectic Polysaccharides
3.6K
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...
3.6K
Proteoglycans
3.9K
Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...
3.9K
Protein Glycosylation
6.9K
Glycosylation, the most common post-translational modification for proteins, serves diverse functions. Adding sugars to proteins makes the proteins more resistant to proteolytic digestion. Glycosylated proteins can act as markers and receptors to promote cell-cell adhesion. Additionally, they have many essential quality control functions in the cell, such as correct protein folding and facilitating transport of misfolded proteins to the cytosol, which can be degraded.
Glycosylation occurs in...
Glycosylation occurs in...
6.9K
Phloem and Sugar Transport
37.3K
Like many living organisms, plants have tissues that specialize in specific plant functions. For example, shoots are well adapted to rapid growth, while roots are structured to acquire resources efficiently. However, sugar production is primarily restricted to the photosynthetic cells that reside in the leaves of angiosperm plants. Sugar and other resources are transported from photosynthetic tissues to other specialized tissues by a process called translocation.
37.3K


