In vitro and in silico studies of methanol extract of BrideliaStipularis on S. aureus and E. coli

Antibacterial potency of BS extract-Computational evaluation

Abstract

Bacterial resistance to contemporary antibiotics is an emerging problem in allopathy. The pursuit of a novel therapeutic agent with superior activity to conventional antibacterial agents has piqued the interest of pharmaceutical scientists in recent decades. It has been established by several scientists that plant extracts are the source of many valuable phytochemicals that may have a variety of medicinal activities. Some of the compounds present in Brideliastipularis are reported to have anti-cancer and anti-microbial activities. In the present work, we examined the phytochemicals present in the methanol extract of BS using GC-MS analysis. The extract was screened for anti-bacterial activity against S. aureus and E. coli in DMSO using the well-cut method. The extract's activity was comparable to that of standard antibiotics such as erythromycin, streptomycin, cefotaxime and cloxacillin. In silico investigations of the phytochemicals that have the highest proportion in the extract were conducted with the structural proteins of S. aureus and E. coli. Among the identified compounds, steroidal and sulphonyl hydrazone molecules showed high binding affinity on the enzymes of E. coli and S. aureus. Binding analysis of highly stable receptor-ligand complexes were discussed in the article.