相关实验视频
Updated: Jan 24, 2026

06:38
Screening and Isolation of C-Glycoside-Cleaving Intestinal Bacteria
Published on: February 28, 2025
687
普罗萨素通过多个甲素以一种由前素调节的方式被切割成托素
Molly Hodul1, Courtney Lane-Donovan1, Emily S Cheang1
1Department of Neurology, University of California, San Francisco, California, USA.
Journal of neurochemistry
|January 23, 2026
概括
普罗萨素 (PSAP) 裂变产生了对脂分解至关重要的素. 这项研究确定了多个cathepsins,PGRN和MGFs作为PSAP处理的关键调节者,为 lysosomal存储障碍提供了新的治疗标.
科学领域:
- 溶解体生物学 溶解体生物学
- 斯芬戈脂类的新陈代谢
- 蛋白酶的功能是保护酶的功能.
背景情况:
- 普罗萨波辛 (PSAP) 是一种溶解体蛋白质,对脂代谢至关重要.
- PSAP被加工成四种沙素 (SapA-D),这些沙素对脂分解和 lysosomal 功能至关重要.
- 功能障碍的PSAP与溶酶体储存和神经退行性疾病有关.
研究的目的:
- 为了确定负责前素 (PSAP) 分裂成生物活性素的溶解酶.
- 阐明管理PSAP加工和素释放的监管机制.
主要方法:
- 在体外切割试验中,使用人类prosaposin进行了分离测试.
- 蛋白酶活性的pH依赖性分析.
- 研究PGRN和MGF在PSAP加工中的作用.
主要成果:
- 多个 lysosomal 蛋白质酶,包括 cathepsins D,B,E,K,L,S,V,G,和阿斯巴拉金特异性内酶,被确定为PSAP处理器.
- 证实了cathepsins D和B是PSAP裂变中的关键参与者.
- 发现PGRN和多粒素片段 (MGFs) 直接调节由甲素D的PSAP裂变.
结论:
- 一个复杂的cathepsins,PGRN和MGFs网络合作生产saosins.
- 这些发现揭示了调节素水平的新机制,为PSAP相关疾病提供了潜在的治疗途径.
相关概念视频
Regulation of Expression Occurs at Multiple Steps
25.8K
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
25.8K
Regulation of Expression Occurs at Multiple Steps
3.9K
3.9K
Regulation of Expression at Multiple Steps
1.3K
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
1.3K
Hormonal Regulation
35.8K
The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
35.8K
Master Transcription Regulators
7.7K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
7.7K
Epigenetic Regulation
33.5K
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
33.5K

