多价值抑制Aspergillus烟草KDNase的多价值抑制
Mathieu Scalabrini1, Denis Loquet1, Camille Rochard2
1Nantes Université, CNRS, CEISAM, UMR 6230, F-44000 Nantes, France. sebastien.gouin@univ-nantes.fr.
Organic & biomolecular chemistry
|June 28, 2024
概括
研究人员使用多价值策略开发了Aspergillus fumigatus KDNase (AfKDNAse) 的强效抑制剂. 聚-KDN化合物显著降低了真菌纤维化,显示出作为抗病毒因子的前景.
科学领域:
- 生物化学 生物化学
- 菌类学 菌类学是指菌类学.
- 药用化学 医学化学
背景情况:
- 阿斯伯吉勒斯烟虫是一种机会性病原体,在免疫受损的个体中引起严重感染.
- 针对罕见糖KDN的外甘油酶AfKDNAse与真菌细胞壁结构和毒性有关.
- 需要有效的抑制剂来研究KDNAse功能并开发新的抗真菌策略.
研究的目的:
- 设计和合成新的,酶稳定的KDNAse的抑制剂.
- 评估KDN衍生物对复合KDNAse的抑制活性.
- 评估最有效的抗艾滋病抑制剂的抗病毒性潜力. 烟雾化物. 烟雾化物.
主要方法:
- 设计C2,C9结合的异质KDN和聚合KDN化合物.
- 使用聚合物化合物的点击化学合成抑制剂.
- 使用重组KDNAse. 的酶抑制试验.
- 评估聚KDN对A的影响. 烟雾剂 丝状. 丝状. 烟雾剂 丝状. 丝状. 丝状.
主要成果:
- 为稳定抑制剂设计的 thio-KDN 基因.
- 通过二-KDN和多-KDN化合物分别实现中度和强度的抑制.
- 与单价KDN参考基因相比,Poly-KDN的抑制活性提高了900倍以上 (IC50 = 1.52 ± 0.37 μM).
- 聚-KDN 显著减少A.A. 在微分子度下使用烟丝.
结论:
- 多价值是开发强大的KDNase抑制剂的有效策略.
- 聚-KDN代表了迄今为止报告的最强大的合成KDNase抑制剂.
- 聚-KDN通过抑制真菌纤维化表现出抗病毒性质,这表明其具有治疗潜力.
更多相关视频
09:52Histological Quantification to Determine Lung Fungal Burden in Experimental Aspergillosis
Published on: March 9, 2018
10.6K
09:21Inhibition of Aspergillus flavus Growth and Aflatoxin Production in Transgenic Maize Expressing the α-amylase Inhibitor from Lablab purpureus L.
Published on: February 15, 2019
10.5K
相关概念视频
Enzyme Inhibition
Inhibitors are molecules that reduce enzyme activity by binding to the enzyme. In a normally functioning cell, enzymes are regulated by a variety of inhibitors. Drugs and other toxins can also inhibit enzymes. Some inhibitors bind to the enzyme’s active site, while others inhibit enzymatic activity by binding to other sites on the protein structure.
Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Inhibition of Cdk Activity
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
cAMP-dependent Protein Kinase Pathways
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,...
Inhibition of CDK Activity
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
Antifungal Agents
Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to cholesterol contributes to...
