Baqai Institute of Information Technology, Baqai Medical University Karachi, Karachi, Pakistan.
Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan.
PLoS One. 2022 Aug 25;17(8):e0273252. doi: 10.1371/journal.pone.0273252. eCollection 2022.
Moraxella catarrhalis (M. catarrhalis) is a gram-negative bacterium, responsible for major respiratory tract and middle ear infection in infants and adults. The recent emergence of the antibiotic resistance M. catarrhalis demands the prioritization of an effective drug target as a top priority. Fortunately, the failure of new drugs and host toxicity associated with traditional drug development approaches can be avoided by using an in silico subtractive genomics approach. In the current study, the advanced in silico genome subtraction approach was applied to identify potential and pathogen-specific drug targets against M. catarrhalis. We applied a series of subtraction methods from the whole genome of pathogen based on certain steps i.e. paralogous protein that have extensive homology with humans, essential, drug like, non-virulent, and resistant proteins. Only 38 potent drug targets were identified in this study. Eventually, one protein was identified as a potential new drug target and forwarded to the structure-based studies i.e. histidine kinase (UniProt ID: D5VAF6). Furthermore, virtual screening of 2000 compounds from the ZINC database was performed against the histidine kinase that resulted in the shortlisting of three compounds as the potential therapeutic candidates based on their binding energies and the properties exhibited using ADMET analysis. The identified protein gives a platform for the discovery of a lead drug candidate that may inhibit it and may help to eradicate the otitis media caused by drug-resistant M. catarrhalis. Nevertheless, the current study helped in creating a pipeline for drug target identification that may assist wet-lab research in the future.
卡他莫拉菌(M. catarrhalis)是一种革兰氏阴性菌,可导致婴儿和成人的主要呼吸道和中耳感染。具有抗生素耐药性的卡他莫拉菌的新近出现,要求将有效的药物靶标作为重中之重进行优先考虑。幸运的是,通过使用计算机减基因组学方法,可以避免新药物的失败以及与传统药物开发方法相关的宿主毒性。在本研究中,采用了先进的计算机基因组消减方法来鉴定针对卡他莫拉菌的潜在和病原体特异性药物靶标。我们基于某些步骤(例如与人类具有广泛同源性的旁系蛋白、必需蛋白、类药蛋白、非毒性蛋白和耐药蛋白)从病原体的全基因组应用了一系列消减方法。本研究仅鉴定出 38 个有潜力的药物靶标。最终,鉴定出一种蛋白质作为潜在的新药物靶标,并提交给基于结构的研究,即组氨酸激酶(UniProt ID:D5VAF6)。此外,针对组氨酸激酶对 ZINC 数据库中的 2000 种化合物进行了虚拟筛选,根据结合能和 ADMET 分析中表现出的特性,将三种化合物列为有潜力的治疗候选物。鉴定出的蛋白质为发现抑制它的先导药物候选物提供了一个平台,这可能有助于消除由耐药性卡他莫拉菌引起的中耳炎。尽管如此,本研究还是为药物靶标鉴定创建了一个管道,这可能有助于未来的湿实验室研究。
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