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Effect of substituting glutamine with lysine on structural and biological properties of antimicrobial peptide Polybia-MP1

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Abstract

The natural antimicrobial peptide Polybia-MP1 is a promising candidate for develo** new treatment therapy for infection and cancer. It showed broad-spectrum antimicrobial and anticancer activity with high safety on healthy cells. However, previous sequence modification usually resulted in at least one of two consequences: a notable increase in hemolytic activity or a considerable decrease in activity against Gram-negative bacteria and cancer cells. Herein, a new approach was applied by replacing the amino acid Glutamine at position 12 with Lysine and generating the MP1-Q12K analog. Our preliminary data suggested an enhancement in antibacterial and antifungal activity, whereas the anticancer and hemolytic activity of the two peptides were comparable. Moreover, MP1-Q12K was found to be less self-assembly than Polybia-MP1, which further supports the enhancement of antimicrobial properties. Hence, this study provides new information regarding the structure–activity relationships of Polybia-MP1 and support for the development of potent, selective antimicrobial peptides.

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Data availability

The data that support the findings of this study are openly available at https://doi.org/10.1007/s00726-023-03276-3.

Abbreviations

AMP:

Antimicrobial peptide

DMSO:

Dimethyl sulfoxide

HPLC:

High performance liquid chromatography

PC:

Phosphatidylcholine

PE:

Phosphatidylethanolamines

PS:

Phosphatidylserin

RBC:

Red blood cell

SARs:

Structure–activity relationships

MP1:

Polybia-MP1

MTT :

3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide

SDS:

Sodium Dodecyl sulfate

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Acknowledgements

This research is funded by The PHENIKAA University Foundation for Science and Technology Development, Grant number 2-01.2020.02.

Funding

The PHENIKAA University Foundation for Science and Technology Development, Grant number 2-01.2020.02.

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Authors and Affiliations

Authors

Contributions

H.B.T.P., H.T.T. and H.L.X wrote the manuscript text, H.B.T.P. and H.L.X prepared Figures 1, 2, 5 and 6. H.T.T prepared Figure 3. H.B.T.P, H.P.T and M.N.H prepared Table 2 and Table 3. H.P.T and M.C.V prepared Figure 4. H.B.T.P, V.A.T, K.N.N and V.N.H synthesized peptides. All authors reviewed the manuscript.

Corresponding authors

Correspondence to Hiep Tuan Tran or Huy Luong Xuan.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Handling editor: F. Albericio.

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Phuong, H.B.T., Tran, V.A., Ngoc, K.N. et al. Effect of substituting glutamine with lysine on structural and biological properties of antimicrobial peptide Polybia-MP1. Amino Acids 55, 881–890 (2023). https://doi.org/10.1007/s00726-023-03276-3

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  • DOI: https://doi.org/10.1007/s00726-023-03276-3

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