ArticleCurrent microbiology2024
Unveiling the Bioactive Potential of Bacterial Isolates from Extreme Environments of Pakistan by In Vitro and In Silico Approaches.
Article in Current microbiology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The soil hosts a wide array of bacterial species capable of producing diverse bioactive compounds. This research aimed to screen bacterial isolates for their bioactive potential from extreme environments in Pakistan. Out of the 69 isolates examined, only 7 exhibited antagonistic activity against Bacillus sp. and Escherichia coli test strains. Notably, the B. cereus DS-2 strain demonstrated the highest antibacterial potential (31 mm and 15 mm) against the Bacillus and E. coli test strains, respectively. Mode-of-action studies suggested that the crude extract might have induced morphological abnormalities in the Bacillus sp. (test strain), causing cell contraction, chain breakage, and deformation. Furthermore, the B. cereus DS-2 strain displayed significant antioxidant potential (64.8%) as revealed by the 2,2-Diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay. Thin-layer chromatography (TLC) of the DS-2 crude extract led to the separation of six components, with only spots 3 and 4 exhibiting the antibacterial potential (3 mm and 5 mm, respectively). Subsequently, gas chromatography-mass spectrometry (GC-MS) analysis of the bioactive fraction extracted from TLC revealed the presence of diisooctyl phthalate, dibutyl phthalate, hexadecanoic acid methyl ester, and octadecanoic acid methyl ester. Molecular docking analysis of diisooctyl phthalate and dibutyl phthalate revealed their binding affinity against E. coli and Bacillus sp. targets. ADMET analysis confirmed the solubility, toxicity, and drug-like properties of the ligands based on Lipinski's rule of five. Current findings suggest that these compounds hold promise as antibacterial agents in drug development. This study underscores the diverse microbial community present in extreme environments and highlights the versatile applications of natural products derived from these strains.
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