探索由基于共识评分的虚拟查驱动的病毒蛋白酶抑制器空间
Mamona Mushtaq1, Sehrish Naz1, Sajda Ashraf1
1Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270 Pakistan.
In silico pharmacology
|December 5, 2023
概括
研究人员通过计算阻止NS2B和NS3蛋白酶之间的相互作用来确定潜在的药物候选物来抑制登革热病毒. 这项研究为登革热药物发现提供了新的支架,解决了对有效治疗的需求.
科学领域:
- 病毒学 病毒学
- 药物发现 药物发现 药物发现
- 计算化学的计算化学
背景情况:
- 登革热是一个重要的全球卫生问题,没有有效的疫苗或治疗方法.
- 抑制NS2B-NS3蛋白酶复合体是对抗登革热病毒的一个有希望的策略.
- 确定安全设计的药物点对于新疗法开发至关重要.
研究的目的:
- 通过计算建模和识别登革热病毒NS2B-NS3蛋白酶复合物的抑制剂.
- 探索阻断NS2B-NS3相互作用所必需的物理化学特征.
- 发现新的小分子作为登革热抗病毒药物的潜在支架.
主要方法:
- 氨酸扫描用于识别NS2B-NS3关联的关键热点残留物.
- 基于共识分数的化学数据集的虚拟选.
- 分子对接,分子动力学模拟和结合自由能计算.
主要成果:
- 确定了关键残留物 (Tyr23,Lys26,Phe46,Leu58),对NS2B-NS3相互作用至关重要.
- 选了1500多个小分子,其中233个正在进行对接.
- 选择了前五个分子,表现出增强的稳定性和与目标蛋白的结合亲和力.
结论:
- 该研究成功地确定了针对登革热病毒NS2B-NS3蛋白酶的潜在蛋白质-蛋白质相互作用阻断剂.
- 发现的化合物显示出希望作为开发登革热抗病毒疗法的新型支架.
- 进一步的研究将集中在针对DENV-2的基于结构的药物设计的原子细节上.
更多相关视频
相关概念视频
Drug Discovery: Overview
Drug discovery is a multifaceted process involving extensive screening, testing, and optimization of lead compounds to identify potential new drugs for therapeutic use. It combines several approaches, including screening large numbers of natural products, chemical modification of known active molecules, identification of new drug targets, and rational design based on biological mechanisms and drug-receptor structure. These approaches are carried out in both academic research laboratories and...
Subviral Agents
Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...
Inhibitors of Viral Protein Synthesis
Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
Inhibitors Of Virion Release
Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...
Inhibitors of Virion Maturation and Assembly
As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...


