Screening of Pigment Producer from Native Halophilic Archaea
DOI:
https://doi.org/10.66224/BiotechIntellect.3.1.58Keywords:
Pigments, haloarchaea, carotenoid, antioxidant, Screening, antibacterialAbstract
Purpose and aim: Halophilic archaea have a high potential to discover new compounds with high biotechnological potential, one of these compounds is carotenoids.
Material and Methods: A collection of 23 native highly halophilic archaea isolates were isolated from distinct saline habitats in different regions of Iran. Among the examined isolates, the isolates that had produced colored colonies within a week were further investigated by absorption spectrophotometric method in order to extract and measure the amount of pigment produced with different solvents of methanol, acetone, hexane, ethernet and ethanol. UV, TLC, FT-IR, LC-MS spectroscopic methods were used to investigate and determine the carotenoid pigment structure of Haloferax Mediterranei ASFM403 strain. Its antioxidant and antimicrobial properties were investigated. Also, the effect of produced carotenoid toxicity on melanoma cancer cells and human fibroblast cells was studied
Results and Discussion: According to the results obtained from the screening of the strains, the best methanol solvent and the best absorbance 0.239 at the wavelength of 498 belonged to the Haloferax Mediterranei ASFM403 strain. The light absorption data of the pigment shows the structural similarity of this carotenoid with bacterioruberin.
Conclusion: The information obtained from carotenoid identification with TLC, FT-IR and LC-MS shows that bacterioruberin is the dominant carotenoid. The antioxidant activity of carotenoid obtained at a concentration of 5 μg reached 83%, which was higher than ascorbic acid as a standard. And the antibacterial effect was significant against pathogenic bacteria. It also has a toxic effect on melanoma cancer cells in concentrations of 10 and 50 micrograms/liter. While, it helps the growth of fibroblast cells.
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Copyright (c) 2026 Milad Behroozi (Author); Maryam Jalili Tabaii ; Soheila Abbasi, Giti Emtiazi (Author); Ramona Massoud

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