Jesudass Joseph Sahayarayan

Traveler’s diarrhea (TD), manifested by loose stools, is a critical health issue affecting the digestive system. It poses a significant health risk with documented mortality and morbidity. Escherichia coli and Klebsiella are primary causative organisms. The emergence of New Delhi metallo-β-lactamases (NDM-1), initially reported in E. coli and Klebsiella pneumoniae, has driven the rapid dissemination of antibiotic-resistant strains. The bla NDM-1 gene encodes NDM-1, an enzyme that confers resistance to β-lactam antibiotics. Traditionally, Cucumis anguria L., which is native to Africa and is widely distributed in East and Southern Africa, has been used to alleviate various stomach disorders. The NDM-1 metallo-β-lactamase protein is involved in the production of β-lactams. In this study, we have conducted in silico screening of natural bioactive compounds, including ethylenediaminetetraacetic acid (EDTA), to identify potential inhibitors of metallo-β-lactamase protein. Molecular docking is performed to evaluate the binding interactions between the compounds and NDM-1. Subsequently, the ADME/Tox properties of the lead compounds and EDTA are predicted. The phytocompounds homogentisic acid, caffeic acid, and protocatechuic acid have Glide g-scores of −8.818, −8.663, and −8.121 kcal/mol, respectively. They form hydrogen bonds with GLN 123 and ASN 220, along with metal coordination involving Zn²⁺ ions. Molecular dynamics (MD) simulations, including RMSD, RMSF, R _g, and hydrogen bond analyses, are conducted on the top-ranked protein–ligand complexes and EDTA. The results indicate that the protein–ligand complexes remained stable throughout the 100 ns simulation period. This assessment provides the first evidence supporting the specificity and compatibility of potential phytochemicals in C. anguria against TD by inhibiting β-lactam proteins.

Microorganisms are exceptional at producing several volatile substances called microbial volatile organic compounds (mVOCs). The mVOCs allow the microorganism to communicate with other organisms via both inter and intracellular signaling pathways. Recent investigation has revealed that mVOCs are chemically very diverse and play vital roles in plant interactions and microbial communication. The mVOCs can also modify the plant’s physiological and hormonal pathways to augment plant growth and production. Moreover, mVOCs have been affirmed for effective alleviation of stresses, and also act as an elicitor of plant immunity. Thus, mVOCs act as an effective alternative to various chemical fertilizers and pesticides. The present review summarizes the recent findings about mVOCs and their roles in inter and intra-kingdoms interactions. Prospects for improving soil fertility, food safety, and security are affirmed for mVOCs application for sustainable agriculture.