Isolation and characterization of novel carotenoid pigment from marine Planococcus maritimus MBP-2 and their biological applications

Abstract

Background: Numerous types of carotenoids with other structures are produced by organisms like bacteria, fungi, algae, yeast, higher plants, etc. In the present study, carotenoid pigment-producing, orange or red-pigmented organisms were isolated from scraping from the ship hull. Material and Methods: According to Bergey's manual of systematic bacteriology, the isolated bright orange pigmented organism was identified based on morphology, biochemical and physiological characters, strain myelin basic protein MBP-2 and identified as Planococcus maritimus. Results: Orange pigment was extracted by solvent extraction method and characterized by using UV–Vis spectroscopy, scanning electron microscope, Transmission electron microscope, and Fourier-transform infrared spectroscopy. The Maximum absorbance was obtained at 447 nm, justify the presence carotenoid pigment in MBP-2 and FTIR results reveals the same. The antibacterial activities were performed against gram positive bacteria, Staphylococcus aureus (ATCC 25923) was 6 ± 0.12 mm, Bacillus cereus (ATCC 14579) was 12.3 ± 1.02 mm and gram negative Escherichia coli was 5.8 ± 0.91 mm, Pseudomonas aeruginosa (ATCC 39315) was 5.6 ± 1.12 mm and Klebsiella pneumoniae (ATCC 13313) was 11.6 ± 1.01. Furthermore antifungal activities were tested against Aspergillus niger (5 ± 2.15 mm), Aspergillus flavus (25 ± 0.85 mm), Pencillium commune( 14.8 ± 1.15 mm), Pencillium digitatum (12.0 ± 1.8) mmand showed sensitive to some of the bacterial and fungal pathogens. The in-vitro cytotoxic activity of pigment showed 19.46 ± 1.46% of cell death against DLA cells at 20 μl/ml of the drug concentration. Conclusion: The isolated orange carotenoid is a good source to treat antimicrobial, antifungal and anticancer activates and further study to be implemented.

Keywords

• Planococcus maritimus
• Orange pigments
• Antimicrobial
• Antifungal
• Cytotoxicity