通过热蛋白质组剖析发现糖化依赖蛋白质功能
bioRxiv : the preprint server for biology
|January 23, 2026
概括
改变的蛋白质糖化会触发细胞应激反应和蛋白质降解. 特定的甘氨酸变化,如化损失,影响细胞表面蛋白质功能,提供潜在的治疗途径.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 系统生物学 系统生物学
背景情况:
- 蛋白质糖化对细胞功能,如蛋白质折叠和稳定性至关重要.
- 异常糖化对蛋白质功能和相互作用的影响尚不清楚.
研究的目的:
- 系统地研究糖基化如何影响蛋白质的稳定性和功能.
- 探索改变糖基化对细胞过程和蛋白质相互作用网络的影响.
主要方法:
- 利用基于质谱的蛋白质组学,化学糖生物学和分子动力学模拟.
- 扰乱了分泌途径以产生具有明显甘氨酸结构的蛋白质.
- 采用热蛋白质组分析来分析糖化变化的功能后果.
主要成果:
- 观察到融合的细胞应激反应,包括贩运重组和蛋白质向降解的重定向,在糖化乱之后.
- 确定了终端甘氨酸修饰,特别是化和化,对细胞表面蛋白质功能产生最显著的影响.
- 证明了整合素α4中化损失限制了构造动态,降低了VCAM-1结合亲和力.
结论:
- 糖化对蛋白质功能的调节是复杂的,并超出了简单的糖形式识别范围.
- 终端糖基化,特别是基化中出现的干扰,可以显著改变蛋白质的功能和相互作用.
- 研究结果表明,针对多发性硬化症等疾病的葡萄糖酶化,可能存在潜在的治疗策略.
更多相关视频
07:38Mass Spectrometry-Based Proteomics Analyses Using the OpenProt Database to Unveil Novel Proteins Translated from Non-Canonical Open Reading Frames
Published on: April 11, 2019
13.4K
11:25Targeting Cysteine Thiols for in Vitro Site-specific Glycosylation of Recombinant Proteins
Published on: October 4, 2017
7.1K
相关概念视频
Protein Glycosylation
9.5K
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...
9.5K
Structural Protein Function
29.8K
Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
29.8K
Structural Protein Function
3.2K
3.2K
Mechanical Protein Functions
5.5K
Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force.
5.5K
cAMP-dependent Protein Kinase Pathways
8.4K
Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
8.4K
Mechanical Protein Function
2.5K
2.5K
