Thanatin TFA

Thanatin TFA is an inducible cationic antimicrobial peptide. Thanatin TFA s a pathogen-inducible single-disulfide-bond-containing β-hairpin AMP. Thanatin TFA displays broad-spectrum activity against both Gram-negative and Gram-positive bacteria as well as against various species of fungi with MICs of 0.3-40 µM, 0.6-40 µM and 0.6-20 µM, respectively. Thanatin TFA has the property of competitive replacement of divalent cations from bacterial outer membrane (OM), leading to OM disruption.

Thanatin TFA is strongly cationic (pI of 10.48) and contains a distinct short eight-residue basic loop created through a disulfide bond formation between residues Cys11 and Cys18 at the C-terminus. ^[1].
Thanatin TFA exhibits potent inhibitory effect on the growth of all New Delhi metallo-β-lactamase-1 (NDM-1)-producing E. coli and K. pneumoniae strains at 0.4-3.2 μM of the minimum inhibitory concentration (MIC) values^[2].

Thanatin (1, 3, 6 mg/kg; ip; at 1 and 6 h) TFA protects mice infected with NDM-1-producing E. coli^[2].

References:
[1]. Rachita Dash, et al. Thanatin: An Emerging Host Defense Antimicrobial Peptide with Multiple Modes of Action. Int J Mol Sci. 2021 Feb 3;22(4):1522.
[2]. Bo Ma, et al. The antimicrobial peptide thanatin disrupts the bacterial outer membrane and inactivates the NDM-1 metallo-β-lactamase. Nat Commun. 2019 Aug 6;10(1):3517.