A novel substituted derivative of sterol from marine actinomycetes Nocardiopsis alba MCCB 110 antagonistic to the aquaculture pathogen Vibrio harveyi
| Autor: | Philip Rosamma, Prathapan Sreedharan, Vrinda Sukumaran, I. S. Bright Singh, A. Mohandas, K.S. Sunish, Sobhi Daniel, Mathew Biji |
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| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Nocardiopsis food.ingredient Microorganism 030106 microbiology Aquaculture medicine.disease_cause Microbiology 03 medical and health sciences food Nocardiopsis alba RNA Ribosomal 16S Spectroscopy Fourier Transform Infrared medicine Actinomyces Pathogen Vibrio biology Vibrio harveyi Chemistry 16S ribosomal RNA biology.organism_classification Sterol Actinobacteria Sterols 030104 developmental biology Infectious Diseases Antibacterial activity |
| Zdroj: | Microbial Pathogenesis. 157:104967 |
| ISSN: | 0882-4010 |
| Popis: | In an attempt to screen antagonistic microorganisms from marine environment for the management of bacterial pathogens in aquaculture, an isolate of actinomycete MCCB 110 was segregated based on its comparatively higher inhibitory property on Vibrio harveyi (MCCB 111) and profound luminescent inhibition. Based on the culture characteristics, cell wall fatty acid profile and the nucleotide sequence of the 16S rRNA gene (1495 bp), the isolate was identified as Nocardiopsis alba. Solvent extraction of the fermentation broth followed by TLC and HPLC analyses resulted in the isolation of a major fraction active against luminescent Vibrio harveyi. Partial characterization of this bioactive fraction based on spectroscopic data obtained from FT-IR, UV, MS-MS and 1H NMR analyses identified it as a substituted derivative of sterol, and was recognized to differ from those reportedly produced by the same genus. The fraction was not toxic to VERO cell line and shrimp haemocytes up to 1000 ppm tested. The study demonstrated the potential of the putative probiotic Nocardiopsis alba (MCCB 110) and its novel extra-cellular bioactive product in the management of Vibrio harveyi in aquaculture. |
| Databáze: | OpenAIRE |
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