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Bioprospecting of unexplored halophilic actinobacteria against human infectious pathogens

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Abstract

Human pathogenic diseases received much attention recently due to their uncontrolled spread of antimicrobial resistance (AMR) which causes several threads every year. Effective alternate antimicrobials are urgently required to combat those disease causing infectious microbes. Halophilic actinobacteria revealed huge potentials and unexplored cultivable/non-cultivable actinobacterial species producing enormous antimicrobials have been proved in several genomics approaches. Potential gene clusters, PKS and NRPKS from Nocardia, Salinospora, Rhodococcus, and Streptomyces have wide range coding genes of secondary metabolites. Biosynthetic pathways identification via various approaches like genome mining, In silico, OSMAC (one strain many compound) analysis provides better identification of knowing the active metabolites using several databases like AMP, APD and CRAMPR, etc. Genome constellations of actinobacteria particularly the prediction of BGCs (Biosynthetic Gene Clusters) to mine the bioactive molecules such as pigments, biosurfactants and few enzymes have been reported for antimicrobial activity. Saltpan, saltlake, lagoon and haloalkali environment exploring potential actinobacterial strains Micromonospora, Kocuria, Pseudonocardia, and Nocardiopsis revealed several acids and ester derivatives with antimicrobial potential. Marine sediments and marine macro organisms have been found as significant population holders of potential actinobacterial strains. Deadly infectious diseases (IDs) including tuberculosis, ventilator-associated pneumonia and Candidiasis, have been targeted by halo-actinobacterial metabolites with promising results. Methicillin resistant Staphylococus aureus and virus like Encephalitic alphaviruses were potentially targeted by halophilic actinobacterial metabolites by the compound Homoseongomycin from sponge associated antinobacterium. In this review, we discuss the potential antimicrobial properties of various biomolecules extracted from the unexplored halophilic actinobacterial strains specifically against human infectious pathogens along with prospective genomic constellations.

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All data generated during this study are included in this article.

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The authors declared that there is no code availability/material used related to this manuscript.

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Acknowledgements

The authors are thankful to the National Centre for Coastal Research (NCCR), MoES for the academic support. In addition, we acknowledge RUSA 2.0-Biological Sciences, Bharathidasan University and DST-FIST, Govt. of India, in Marine Science (SR/FST/ES-I/2019/62 (C)), Bharathidasan University, Tiruchirapalli-24 for the academic support.

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No funding was received to assist with the preparation of this manuscript.

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Authors and Affiliations

Authors

Contributions

AJR: conceptualization, validation, formal analysis, investigation, writing-original draft, writing-review & editing. HS and HUD: conceptualization, methodology. VTD: software, validation, formal analysis. VD: investigation, data curation, visualization, AJR and HS writing-original draft, SGM: writing-review & editing.

Corresponding authors

Correspondence to Arthur James Rathinam or Hans-Uwe Dahms.

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On behalf of all the authors, the corresponding author states that there is no conflict of interest.

Research involving human participants and/or animals

The authors declared that there is no human and/or animals’ participations are involved in this study.

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Not applicable to the current review as we have not used any human or animal subject andall the authors of this article agree to the publication.

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Rathinam, A.J., Santhaseelan, H., Dahms, HU. et al. Bioprospecting of unexplored halophilic actinobacteria against human infectious pathogens. 3 Biotech 13, 398 (2023). https://doi.org/10.1007/s13205-023-03812-8

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  • DOI: https://doi.org/10.1007/s13205-023-03812-8

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