Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Isolation and Identification of Antioxidant-producing Marine Bacteria and Medium Optimization.

항산화 물질을 생산하는 해양 미생물의 분리.동정 및 배양 특성 조사

  • Published : 2002.09.01
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Abstract

For the research of the natural marine antioxidant, several bacteria were isolated from the coast of jin-Hae in Korea. Among the marine bacteria studied, strain HJ-14, a gram-negative, motile, strait rod, aerobic, and $Na^{+}$ required bacterium showed high activity of 1,1-diphenyl-2-picrylhydrazyl radical scav- enging. The morphological, physiological, and biochemical characteristics of the strain HJ-14 were similar to those of the Alteromonas macleodii ATCC $27126^{T}$ . Thus, it was tentatively identified as Alteromonas sp. HJ-14. The compositions of major fatty acids in cell membrane of Alteromonas sp. HJ-14 were $C_{ 14:0}$ , $ C_{15:0}$ , $C_{16:0}$ and $C_{17:1}$ $_{w8c}$ , which also suggest that it is affiliated with Alteromonas sp. The optimum culture conditions for production of antioxidant materials with Alteromonas sp. HJ-14 were at $25$~$37^{\circ}C$ and pH 6~8. The optimum conditions for the production of antioxidant for carbon, inorganic nitrogen, and sodium chloride sources were 2.5%(w/v) dextrin, 0.5%(w/v) ammonium sulfate, and 2~6%(w/v) sodium chloride, respectively. The hydroxyl radical scavenging ability of Alteromonas sp. HJ-14 broth was 90.03%, which is higher than ascor-bic acid(83.28%) and lower than butylated hydroxyanisole(95.46%) and $\alpha$-tocopherol(97.17%).

전자 공여능으로 항산화 물질 생산 능력이 우수한 해양 미생물을 분리하여 HJ-14라고 명명하였다. HJ-14는 형태적, 생리적, 생화학적 특성이 Altermonas macleodii ATCC 27126T와 가장 유사하였으며, 주요 세포 지방산이 $C_{14:0}$ , $C_{15:0}$ , $C_{16:1}$ 및 $C_{17:1}$ $_{w8c}$로 분석됨으로서 Aiteromonas SP- HJ-14로 동정하였다. Alteromonas sp. HJ-l4의 항산화 물질 생산에 대한 배양 특성을 조사하기 위해, 탄소원, 무기질소원, sodium chloride농도, 초기 pH및 배양온도의 영향을 관찰하였다. 탄소원으로는 2.5% dextrin, 무기 질소원으로는 ammonium sulfate, sodium chloride는 2~6%, pH와 온도는 각각 pH 6~8, 25~37$^{\circ}C$에서 전자공여능이 높게 나타났으며, 최적 조건일 때에 전자공여능은 90~92%로.나타났다 또한, OH소거능도 90.03%로 관찰되어 항산화활성이 높은 것으로 확인되었다.

Keywords

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