在模型系统中,多自氧化和亲氧化活性诱导蛋白质氧化和蛋白质-多 adduct 形成
Mohammad Bayati1, Mahesha M Poojary1
1Department of Food Science, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg C, Denmark.
Food chemistry
|November 30, 2024
概括
聚醇可以产生过氧化 (H2O2),导致蛋白质氧化和添加物形成. 像氨酸这样的氨基酸会吸收H2O2,而其他氨基酸则形成氧化产物和共价聚添加物.
科学领域:
- 食品化学 食品化学
- 生物化学 生物化学
- 氧化压力是一种氧化压力.
背景情况:
- 众所周知,多具有抗氧化作用,但其抗氧化作用的理解较少.
- 了解多亲氧化剂活性对于食品科学和人类健康至关重要.
研究的目的:
- 量化评估在多自氧化过程中产生的过氧化 (H2O2).
- 为了研究H2O2对蛋白质氧化和多-蛋白质添加物形成的影响.
主要方法:
- 在模型系统中,九种不同的多的自氧化.
- 在不同的条件下 (时间,温度,pH) 量化H2O2的产量.
- 使用LC-Orbitrap-MS/MS.对蛋白质氧化和添加物形成的分析.
主要成果:
- 多产生的H2O2 (0.2-242μM) 没有明确的结构-活性关系.
- 氨基酸和蛋白质抑制了H2O2的形成;氨酸是一个强大的清洁剂.
- 氨酸,氨酸和氨酸残留物被氧化,形成了超过177种不同的.
结论:
- 多自氧化产生反应性氧物种,可以修改蛋白质.
- 聚,H2O2和蛋白质之间的相互作用会影响氧化变化和 adduct 形成.
- 这些发现突出了生物系统中多的复杂氧化还原化学.
更多相关视频
09:33Imaging Approaches to Assessments of Toxicological Oxidative Stress Using Genetically-encoded Fluorogenic Sensors
Published on: February 7, 2018
7.4K
07:29Cell-free Biochemical Fluorometric Enzymatic Assay for High-throughput Measurement of Lipid Peroxidation in High Density Lipoprotein
Published on: October 12, 2017
9.2K
相关概念视频
Radical Autoxidation
2.1K
The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
2.1K
Oxidation of Phenols to Quinones
2.9K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
2.9K
Autoxidation of Ethers to Peroxides and Hydroperoxides
7.4K
Ethers represent a class of chemical compounds that become more dangerous with prolonged storage because they tend to form explosive peroxides when standing in the air. Autoxidation is the spontaneous oxidation of a compound in air. In the presence of oxygen, ethers slowly oxidize to form hydroperoxides and dialkyl peroxides.
7.4K
Peroxisomes
10.9K
Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
10.9K
Oxidation of Alcohols
12.8K
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
The process of oxidation in a chemical reaction is observed in any of the three forms:
12.8K
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
5.6K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
5.6K
