Bactericidal effect of Naja nigricollis toxin γ is related to its membrane-damaging activity

► Toxin γ shows a similar inhibitory activity on the growth of Staphylococcus aureus and Escherichia coli. ► Bactericidal activity of toxin γ depends on its ability to induce membrane permeability. ► Lipopolysaccharide and lipoteichoic acid structurally suppress bactericidal effect of toxin γ.