We performed structural and functional studies of minibactenecin mini-ChBac7.5Nα, a natural proline-rich cathelicidin from domestic goat Capra hircus. To identify the key residues important for the biological action of the peptide, a panel of its alanine-substituted analogues was produced. The development of E. coli resistance to the natural minibactenecin, as well as to its analogues carrying substitutions for hydrophobic amino acids in the C-terminal residues was studied. The data obtained indicate the possibility of rapid development of the resistance to this class of peptides. The main factors in the formation of the antibiotic resistance are various mutations leading to inactivation of the SbmA transporter.
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Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 174, No. 10, pp. 445-451, October, 2022
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Bolosov, I.A., Panteleev, P.V., Balandin, S.V. et al. Structural and Functional Characteristics of the Proline-Rich Antimicrobial Peptide Minibactenecin from Leukocytes of Domestic Goat Capra hircus. Bull Exp Biol Med 174, 440–445 (2023). https://doi.org/10.1007/s10517-023-05725-1
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DOI: https://doi.org/10.1007/s10517-023-05725-1