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KMID : 0613820090190081132
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Journal of Life Science
2009 Volume.19 No. 8 p.1132 ~ p.1138
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The Physicochemical Stabilities and Biological Activities of Pigment Extract from Marine acterium Pseudoalteromonas psicida TA20
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Park Jin-Sook
Jeong Dong-Woo
Kang Myung-Hee
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Abstract
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We investigated the physicochemical stabilities and biological activities of ethanol- extracted pigment from marine bacterium Pseudoalteromonas psicida TA20. This bacterial pigment was very stable at a pH range of between 4.0 and 8.0 at a temperature below 40℃. In the presence of light, the pigment was also very stable, showing more than 90 percent remaining absorbance during 14 days at 25℃. The stability of the pigment, when metal ions were present, showed higher stability in all examined metal ions except for Al³? and Cu²?, especially in the presence of Fe²?. This pigment showed higher stability than other pigment extracts reported. The pigment has free-radical scavenging (3,495 ㎍/㎖) activity and 44% antioxidant protective effect against DNA damage of human lymphocyte cells at a concentration of 10 ㎍/㎖. The results indicate that the bacterial pigment produced a significant reduction in oxidative DNA damage. The pigment also showed antimicrobial activity against major food poisoning bacteria. Therefore, these results suggest that this bacterial pigment could be used as a natural colorant in the food industry, having the advantages of antioxidant and antimicrobial activities.
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KEYWORD
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Comet assay, bacterial pigment, marine bacteria, stability, Pseudoalteromonas psicida
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