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호알칼리성 Coryneform Bacteria TU-19의 형태적, 배양적 특성에 미치는 pH효과
최명철,양재섭,황철원,강선철,Choi, Myoung-Chul,Yang, Jae-Sub,Hwang, Cher-Won,Kang, Sun-Chul 한국응용생명화학회 1998 Applied Biological Chemistry (Appl Biol Chem) Vol.43 No.4
다양한 초발 pH에서 호알칼리성 Coryneform bacteria TU-19 균주를 배양하면서 이 균주의 형태적, 배양적 특성을 조사하였다. 그 결과 $pH\;9.0{\sim}10.0$의 초발 pH 범위에서 공시균주는 정상적인 성장을 보였으나 pH 12.0에서는 성장이 완전히 저해되었다. 흥미롭게도 본 균주는 배지의 초발 pH에 따라 균체의 형태적 변화가 관찰되었다. 즉 pH 8.0, 대수증식기에서 이 균은 길게 둘둘말린 filament 형태를 이루고 있었으나 최적 pH(10.0)에서는 한 개 혹은 두 개의 짧게 뻗은 rod 형태를 보였다. 또한 이 균은 $pH\;9.0{\sim}11.0$ 범위에서 배양할 경우 배양액의 최종 pH를 자신의 생육에 적합하도록 8.5 근처로 조절할 수 있음이 확인되었다. The morphological and cultural characteristics of alkalophilic Coryneform bacteria TU-19 were investigated at various pHs. This bacterium showed normal growth pattern at $pH\;9.0{\sim}10.0$, but the cell growth was completely inhibited at extreme pH (12.0 or more). Interestingly, at pH 8.0 the morphology of the bacterial cells seems to form convoluted filaments during the exponential growth phase while at pH 10.0, the optimal pH for the growth of this organism, the bacteria grew with variable paired or single forms, and straight rods during growth stages. Growing in alkaline media $(pH\;9.0{\sim}11.0)$, it adjusted the pH of the culture media to around pH 8.5 by itself.
호알칼리성 Coryneform bacteria TU - 19 가 생산하는 세종류의 균체외 단백질분해효소의 정제
강선철,최명철,양재섭 ( Sun Chul Kang,Myoung Chul Choi,Jae Sub Yang ) 한국응용생명화학회 1995 Applied Biological Chemistry (Appl Biol Chem) Vol.38 No.6
Alkalophilic coryneform bacteria TU-19 isolated from soil extracellularly produced at least three proteases (Protease Ⅰ, Ⅱ, and Ⅲ). Investigating the cultural conditions related to the enzyme production of this bacterial cell, the optimum pH and temperature were 10.0 and 30℃, respectively. In order to purify these enzymes from the 2 day culture broth ammonium sulfate fractionation, gel filtration and QAE-Sephadex column chromatography were performed step by step. And then these three proteases were purified to near homogeneity by judging from SDS-PAGE pattern, and had the molecular weights of 120, 80, and 45 kilodaltons, respectively. The optimum pH and temperature for the enzyme activity of Protease Ⅰ and Ⅱ were 10.5 and 45℃, respectively, and Protease Ⅱ were 11.0 and 50℃. And the enzymes were completely inhibited by PMSF suggesting serine protease, but not affected by pCMB. 1,10-phenanthroline, IAA, and EDTA.
양재섭,이용화,강선철 대구대학교 기초과학연구소 1989 基礎科學硏究 Vol.6 No.-
An alkalophilic strain (strain TUB 25) was isolated from soil and identified. The strain could strongly produce extracellular alkaline protease. Also the strain was a Gram-positive, sporeforming, rodshaped and aerobic bacterium. It is, therefore, suggested that the bacterium might belong to the genus Bacillus. Accordingly, the isolated strain was named to be Bacillus sp. TUB 25.
호알칼리성 단백질 분해 균주 Bacillus sp. TUB 25 의 최적성장에 관한 연구
양재섭,최명철,이동규,강선철 대구대학교 기초과학연구소 1989 基礎科學硏究 Vol.6 No.-
The optimal growth conditions for Bacillus sp. TUB 25 to secrete a large amount of alkaline protease were investigated. The bacterium was reached to maximum growth level in the culture medium containing 1.0% glucose, 0.5% yeast extract, 0.5% peptone, 0.1% K₂HPO₄, 0.02% MgSO₄, 1.0% Na₂CO₃ and 1.0% NaCl. By addition of Na+, the growth of the strain TUB 25 was highly stimulated. And the growth curve showed the highest optical density when Bacillus sp. TUB 25 cultivated at 37℃ for 24 hours. It was characteristic of that the growth of Bacillus sp. TUB 25 was very excellent in alkaline media, and the optimal pH for the growth was about 10.0∼11.0. The relationship between growth and extracellular protease production of the strain TUB 25 showed that protease activity was not detected during the lag and the exponential phase, but was detected during the early stationary phase.
단백질분해효소를 생성분비하는 호알칼리성 Coryneform bacterium TU-19의 분리 및 동정
최명철,양재섭,강선철 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.2
토양으로부터 알칼리성 단백질분해효소를 생성분비하는 호알칼리성 미생물을 분리하였다. 이 균의 형태적 특징은 Gram 양성이었으며, 포자를 형성하지 않고, 운동성이 없으며, 불규칙적인 간균의 형태를 하고 있는 호기성 미생물이었다. 또한 기타 다른 형태적, 생리생화확적 특징과 종합적으로 비교해 볼 때 이 균주는 Coryneform 세균과 매우 유사하였다. 따라서 본 분리균주는 Coryneform bacterium TU-19로 잠정적으로 동정하였다. 그러나 화학적 분석 결과 및 부분적인 생리생화적 특징들에 있어서는 Coryneform bacteria의 어느 종과도 정확히 일치하지 않았다. An alkalophilic bacterium producing alkaline protease(s) was isolated from soil. It was a Gram-positive, non-sporulating, immotile, irregular rod, strictly aerobic, and weak acid-forming bacterium. The morphological, physiological, and biochemical characteristics of the isolate resembled those of the Coryneform bacteria. However, there was not any species within this genera to which microorganism can be closely matched. Therefore, it is provisionally identified as a Coryneform bacterium TU-19.
호알칼리성 Coryneform Bacteria TU-19 의 형태적 , 배양적 특성에 미치는 pH 효과
강선철,최명철,양재섭,황철원 한국농화학회 1998 Applied Biological Chemistry (Appl Biol Chem) Vol.41 No.5
The morphological and cultural characteristics of alkalophilic Coryneform bacteria TU-19 were investigated at various pHs. This bacterium showed normal growth pattern at pH 9.0∼10.0, but the cell growth was completely inhibited at extreme pH (12.0 or more). Interestingly, at pH 8.0 the morphology of the bacterial cells seems to form convoluted filaments during the exponential growth phase while at pH 10.0, the optimal pH for the growth of this organism, the bacteria grew with variable paired or single forms, and straight rods during growth stages. Growing in alkaline media (pH 9.0∼11.0), it adjusted the pH of the culture media to around pH 8.5 by itself.