Skip to main content
Log in

Antimicrobial activity and bioactive profiling of heterocytous cyanobacterial strains using MS/MS-based molecular networking

  • Original Article
  • Published:
Folia Microbiologica Aims and scope Submit manuscript

Abstract

The rapid emergence of resistance in pathogenic bacteria together with a steep decline in economic incentives has rendered a new wave in the drug development by the pharmaceutical industry and researchers. Since cyanobacteria are recognized as wide producers of pharmaceutically important compounds, we investigated thirty-four cyanobacterial extracts prepared by solvents of different polarities for their antimicrobial potential. Almost all tested cyanobacterial strains exhibited some degree of antimicrobial bioactivity, with more general effect on fungal strains compared with bacteria. Surprisingly ~50% of cyanobacterial extracts exhibited specific activity against one or few bacterial indicator strains with Gram-positive bacteria being more affected. Extracts of two most promising strains were subjected to activity-guided fractionation and determination of the minimum inhibitory concentration (MIC) against selected bacterial and fungal isolates. Multiple fractions were responsible for their antimicrobial effect with MIC reaching low-micromolar concentrations and in some of them high level of specificity was recorded. Twenty-six bioactive fractions analyzed on LC-HRMS/MS and Global Natural Product Social Molecular Networking (GNPS) online workflow using dereplication resulted in identification of only forty-nine peptide spectrum matches (PSMs) with eleven unique metabolites spectrum matches (MSMs). Interestingly, only three fractions from Nostoc calcicola Lukešová 3/97 and four fractions from Desmonostoc sp. Cc2 showed the presence of unique MSMs suggesting the presence of unknown antimicrobial metabolites among majority of bioactive fractions from both the strains. Our results highlight potential for isolation and discovery of potential antimicrobial bioactive lead molecules from cyanobacterial extracts.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3

Similar content being viewed by others

References

Download references

Acknowledgments

The strains for antimicrobial tests were kindly provided by Engy Ahmed and Alica Chroňáková from the Biology Centre of the Czech Academy of Sciences, České Budějovice.

Funding

This work was supported the Ministry of Education, Youth and Sports of the Czech Republic, National Programme of Sustainability I, ID: LO1416 project ALGAMIC (ID: CZ.1.05/2.1.00/19.0392) and MSCA IF II project (CZ.02.2.69/0.0/0.0/18_070/0010493). Access to instruments and other facilities was supported by the Czech Research Infrastructure for Systems Biology (C4SYS; project no. LM2015055). Finally, the study was also supported by Cross-Border cooperation Czech-Bavaria–Project No. 41 and Czech Science foundation (GAČR)- project no. 19-17868Y).

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Pavel Hrouzek.

Additional information

“Dedicated to the memory of Prof. Ivan Šetlík”

Publisher’s note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Electronic supplementary material

ESM 1

(DOCX 1189 kb)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Saurav, K., Macho, M., Kust, A. et al. Antimicrobial activity and bioactive profiling of heterocytous cyanobacterial strains using MS/MS-based molecular networking. Folia Microbiol 64, 645–654 (2019). https://doi.org/10.1007/s12223-019-00737-9

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12223-019-00737-9

Navigation