在和蛋白质中可见光诱导的二硫化键减少
Keting Zhou1, Xiaoyue Yang1, Hanlin Ren1
1MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China.
The journal of physical chemistry. A
|July 31, 2025
概括
一个新的可见光系统有效地减少了用于质谱 (MS) 分析的蛋白质中的二硫化物键. 这种方法使和蛋白质测序成为可能,为生物制药研究提供了基于UV的技术的温和替代方案.
科学领域:
- 分析化学 分析化学
- 生物化学 生化学
- 摄影化学的使用.
背景情况:
- 二硫化键对于蛋白质的结构和功能至关重要.
- 传统的二硫化物键减少方法往往需要严苛的条件,与敏感的生物分子不相容.
- 质谱法 (MS) 是一种强大的蛋白质分析工具,但二硫化物键裂变可能具有挑战性.
研究的目的:
- 开发一种温和的可见光诱导系统,用于减少二硫化物键.
- 为了使二硫化结合减少与质谱法 (MS) 的和蛋白质测序相容.
- 为了证明这个系统在上下蛋白质MS分析中的实用性.
主要方法:
- 可见光 (420nm) 辐射,使用硫 (TX) 作为光催化剂和2,3-二 (DHF) 作为共催化剂.
- 单电子转移 (SET) 机制用于二硫化物键裂解.
- 通过纳米电子喷雾电离反应中间体的直接检测,在线监测和激素捕获.
- 将还原系统与自上而下的蛋白质MS合起来进行测序.
主要成果:
- 通过SET机制成功地通过可见光诱导二硫化物键的减少.
- 直接检测关键的基质中间体 (TX 基离子,DHF 基,基).
- 使用合系统实现了47%的lyszyme测序,与传统方法相比.
- 证明了适合敏感生物制药的轻度反应条件.
结论:
- 开发的可见光诱导的二硫化物减少系统是有效的,并且与基于MS的蛋白质测序兼容.
- 这种方法为UV诱导的减少提供了一个温和的替代方案,扩大了其在生物制药分析中的适用性.
- 该系统对关键应用具有前景,例如对抗体和抗体与药物合物的二硫化物键映射.
更多相关视频
07:16Resin-Assisted Capture Coupled with Isobaric Tandem Mass Tag Labeling for Multiplexed Quantification of Protein Thiol Oxidation
Published on: June 21, 2021
1.9K
11:44Synthesis and Structure Determination of µ-Conotoxin PIIIA Isomers with Different Disulfide Connectivities
Published on: October 2, 2018
12.7K
相关概念视频
Preparation and Reactions of Thiols
6.7K
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
6.7K
Protein Modifications in the RER
5.6K
Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal...
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal...
5.6K
Preparation and Reactions of Sulfides
5.1K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
5.1K
Sulfur Assimilation
77
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
77
Peptide Bonds
77.3K
A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
77.3K
Protein Folding
8.7K
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
8.7K
