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Existence in cellulose shelters: industrial and pharmaceutical leads of symbiotic actinobacteria from ascidian Phallusia nigra, Andaman Islands

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Abstract

The diversity of actinobacteria associated with marine ascidian Phallusia nigra from Andaman Islands was investigated. A total of 10 actinobacteria were isolated and based on the biochemical and molecular characterization, the isolates were assigned to 7 different actinobacterial genera. Eight putatively novel species belonging to genera Rhodococcus, Kineococcus, Kocuria, Janibacter, Salinispora and Arthrobacter were identified based on 16S rDNA sequence similarity with the NCBI database. The organic extracts of ten isolates displayed considerable bioactivity against test pathogens, which were Gram-positive and Gram-negative in nature. PCR-based screening for type I and type II polyketide synthases (PKS-I, PKS-II) and nonribosomal peptide synthetases (NRPS) revealed that, 10 actinobacterial isolates encoded at least one type of polyketide synthases biosynthesis gene. Majority of the isolates found to produce industrially important enzymes; amylase, protease, gelatinase, lipase, DNase, cellulase, urease, phosphatase and l-asparaginase. The present study emphasized that, ascidians are a prolific resource for novel bioactive actinobacteria with potential for novel drug discovery. This result expands the scope to functionally characterize the novel ascidian associated marine actinobacteria and their metabolites could be a source for the novel molecules of commercial interest.

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Acknowledgements

The author’s great fully acknowledge the financial support given by the Ministry of Earth Sciences, Government of India, New Delhi to conduct the survey and research. The authors are thankful to Dr. M. A. Atmanand, Director, National Institute of Ocean Technology, Chennai for providing necessary facilities to perform this research.

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The research concept and the experiments were executed by BM, LA and KN. NVV and GD analysed the data and reviewed the manuscript. All of the authors approved the final manuscript.

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Correspondence to Balakrishnan Meena or Lawrance Anburajan.

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The authors declare that they have no competing interests.

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Meena, B., Anburajan, L., Nitharsan, K. et al. Existence in cellulose shelters: industrial and pharmaceutical leads of symbiotic actinobacteria from ascidian Phallusia nigra, Andaman Islands. World J Microbiol Biotechnol 37, 120 (2021). https://doi.org/10.1007/s11274-021-03090-7

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  • DOI: https://doi.org/10.1007/s11274-021-03090-7

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