重新审视了prolyl oligopeptidase和α-synuclein连接的研究结果
Roos Van Elzen1, Yannick Waumans1, Sangeeta Nath2
1Laboratory of Medical Biochemistry, University of Antwerp, Universiteitsplein 1, B-2610, Wilrijk, Belgium.
Biochimie
|February 21, 2025
概括
普罗利寡酶 (PREP) 与α-synuclein (aSyn) 相互作用较弱,促进早期聚合,但不影响纤维细胞的形成. 这种由抑制剂调节的相互作用表明神经元通路中的作用.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 酶prolyl oligopeptidase (PREP) 和蛋白质α-synuclein (aSyn) 都与神经系统疾病有关.
- 了解PREP和aSyn之间的相互作用对于阐明疾病机制至关重要.
- 以前的研究表明存在潜在的联系,但缺乏详细的分子洞察力.
研究的目的:
- 通过新的无细胞和细胞测试,研究PREP和aSyn之间的联系.
- 描述PREP-aSyn相互作用的性质和后果.
- 在神经元路径的背景下探索这种相互作用的功能影响.
主要方法:
- 光相关谱学和thioflavin-T光学以研究aSyn聚合.
- 类阵列用于识别aSyn.上的PREP结合位点.
- 在SH-SY5Y细胞中进行双染色免疫光显微镜,以评估亚细胞局部化和压力标记.
主要成果:
- 观察到PREP和aSyn之间的弱且短暂的相互作用,促进了早期的聚合阶段.
- 相互作用不依赖aSyn的C端普罗林,而是受到PREP抑制剂的影响.
- 在神经元区内,PREP与aSyn共定位,但与侵袭体或压力标志物没有显著的作用.
结论:
- PREP与aSyn的相互作用是短暂的,并影响早期聚合,这表明它具有调节作用,而不是直接导致纤维细胞形成.
- 这些发现支持了一个假设,即PREP的相互作用部位,可通过抑制剂调节,介导自和神经元囊泡运输/分泌通路之间的交叉对话.
- 这项研究为神经细胞中PREP和aSyn之间的功能相互作用提供了新的分子洞察力.
关键词:
自自是一种自的过程.这是一种PREP抑制剂.普罗利尔寡酸酶 (prolyl oligopeptidase) 是一种酸.蛋白质分泌 蛋白质分泌贩卖囊泡,贩卖囊泡的行为α-synuclein 是一种同核蛋白.更多相关视频
09:36Recombinant α- β- and γ-Synucleins Stimulate Protein Phosphatase 2A Catalytic Subunit Activity in Cell Free Assays
Published on: August 13, 2017
6.7K
09:16Exogenous Administration of Microsomes-associated Alpha-synuclein Aggregates to Primary Neurons As a Powerful Cell Model of Fibrils Formation
Published on: June 26, 2018
7.5K
相关概念视频
Amyloid Fibrils
9.2K
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
9.2K
Protein Modifications in the RER
5.0K
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...
5.0K
The Proteasome
797
Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
797
Lysosomal Hydrolases
3.7K
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
3.7K
Protein Folding Quality Check in the RER
3.7K
ER is the primary site for the maturation and folding of soluble and transmembrane secretory proteins. The calnexin cycle is a specific chaperone system that folds and assesses the confirmation of N-glycosylated proteins before they can exit the ER lumen. The primary players of this quality check pipeline are the lectins, ER-resident chaperones, and a glucosyl transferase enzyme. In case the calnexin system in the lumen fails to salvage a misfolded protein, it is transported to the cytoplasm...
3.7K
Neural Regulation
39.1K
Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
39.1K
