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Vibrio crassostreae PKA 1002의 알긴산 분해 조효소 생산 최적 조건과 조효소의 특성
선우찬 ( Sun Woo Chan ),김꽃봉우리 ( Koth Bong Woo Ri Kim ),김동현 ( Dong Hyun Kim ),정슬아 ( Seul A Jung ),김현지 ( Hyun Jee Kim ),정다현 ( Da Hyun Jeong ),정희예 ( Hee Ye Jung ),임성미 ( Sung Mee Lim ),홍용기 ( Yong Ki Hong ),안 한국미생물생명공학회(구 한국산업미생물학회) 2012 한국미생물·생명공학회지 Vol.40 No.3
This study was conducted to screen an alginate-degrading microorganism and to investigate the characteristics of the alginate-degrading activity of its crude enzyme. Amarine bacterium which produces extracellular alginate-degrading enzymes was isolated from the brown alga Sargassum thunbergii. 16S rRNA sequence analysis and physiological profiling resulted in the bacterium`s identification as a Vibrio crassostreae strain, named Vibrio crassostreae PKA 1002. Its optimal culture conditions for growth were pH 9, 2% NaCl, 30℃ and a 24 hr incubation time. The optimal conditions for the alginate degrading ability of the crude enzyme produced by V. crassostreae PKA 1002 were pH 9, 30℃, a 48 hrincubation time and 8% alginic acid. The alginate degrading crude enzyme produced 3.035 g of reducing sugar per liter in 4% (w/v) alginate over 1 hr.