Pattapulavar Veilumuthu, Ramanujam Sathiyabama, Muthusamy Sanjivkumar, Panchal Shweta, Christopher John Godwin
Department of Biomedical Sciences, School of BioSciences and Technology, Vellore Institute of Technology, Vellore, India.
Department of Science and Humanities, Karpagam Academy of Higher Education, Coimbatore, Tamil Nadu, India.
Bio Protoc. 2025 Jul 20;15(14):e5386. doi: 10.21769/BioProtoc.5386.
Endophytic actinomycetes, particularly species, have gained significant attention due to their potential to produce novel bioactive compounds. In this study, we isolated and characterized an endophytic sp. VITGV100 from the tomato plant (), employing the direct streak method and whole-genome sequencing. A genome analysis was done to uncover its biosynthetic potential and identify indole-type compounds. The strain's secondary metabolite production was evaluated through GC-MS analysis, and its antimicrobial activity was tested against selected human pathogenic bacteria. Our protocol outlines a comprehensive approach, describing the isolation and extraction of metabolites and genome mining for indole-type compounds. This isolate has potential pharmaceutical applications, accelerating the discovery of novel indole-type bioactive compounds. Key features • A systematic approach for isolating sp. VITGV100 from , including surface sterilization and selective culturing on ISP2 medium. • Whole-genome sequencing and annotation: High-throughput Illumina sequencing followed by genome assembly, annotation, and functional characterization to explore biosynthetic potential and metabolic pathways. • Secondary metabolite profiling and bioactivity screening: GC-MS-based identification of bioactive metabolites, followed by antibacterial activity assessment against human pathogens using well-diffusion assays. • Identification of biosynthetic gene clusters (BGCs) using antiSMASH 6.0.
内生放线菌,尤其是某些物种,因其具有产生新型生物活性化合物的潜力而备受关注。在本研究中,我们采用直接划线法和全基因组测序,从番茄植株()中分离并鉴定了一株内生菌sp. VITGV100。进行了基因组分析以揭示其生物合成潜力并鉴定吲哚类化合物。通过气相色谱 - 质谱联用(GC - MS)分析评估了该菌株的次级代谢产物产量,并测试了其对选定人类病原菌的抗菌活性。我们的方案概述了一种全面的方法,描述了代谢产物的分离、提取以及对吲哚类化合物的基因组挖掘。该分离株具有潜在的药物应用价值,可加速新型吲哚类生物活性化合物的发现。关键特性 • 从番茄中分离sp. VITGV100的系统方法,包括表面消毒和在ISP2培养基上进行选择性培养。 • 全基因组测序与注释:采用高通量Illumina测序,随后进行基因组组装、注释和功能表征,以探索生物合成潜力和代谢途径。 • 次级代谢产物谱分析和生物活性筛选:基于GC - MS鉴定生物活性代谢产物,随后使用平板扩散法评估对人类病原体的抗菌活性。 • 使用antiSMASH 6.0鉴定生物合成基因簇(BGCs)。