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NTIS 바로가기Korean journal of microbiology = 미생물학회지, v.54 no.3, 2018년, pp.200 - 207
김도형 (배재대학교 생명공학과) , 이상수 (배재대학교 생명공학과)
At high salt concentration, glycine betaine is transported into Bacillus subtilis and growing rate of the cell is not suppressed. Also according to recent studies, cell growth is maintained normal growth rate at low temperature. Low temperature results in a stress response of Bacillus subtilis that ...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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glycine betaine을 생산하지 못하는 Bacillus subtilis는 무엇을 통해 glycine betaine를 사용하는가? | Bacillus subtilis는 glycine betaine을 생산하지 못하고 외부로부터 흡수하여 사용하거나 전구체인 choline으로부터 합성하여 사용한다(Bremer, 2002). Glycine betaine은 3개의 삼투압 유도성 수송 시스템인 Opu 수송체가 있는데, 이들은 OpuA, OpuC, OpuD로 glycine betaine를 수송한다(Bremer and Krämer, 2000; Bremer, 2002; Ziegler, 2010). | |
glycine betaine의 Bacillus subtilis 생장이 염 농도가 높은 조건에서도 가능한 이유는 무엇인가? | , 1994). 이와 같이 세포 내에 축적된 물질들은 세포의 기능이나 프로세스에 영향을 주지 않고 물이 세포 밖으로 빠져나가는 것을 억제하여 세포 내의 삼투압을 유지시킨다(Krempf and Bremer, 1998; Bremer and Krämer, 2000). 따라서 glycine betaine은 Bacillus subtilis 생장이 염 농도가 높은 조건에서도 가능하게 한다. | |
Opu 수송체에 의하여 수송된 glycine betaine는 무엇으로 작용해 다양한 염 농도 조건에서도 생장이 지속되는가? | Glycine betaine은 3개의 삼투압 유도성 수송 시스템인 Opu 수송체가 있는데, 이들은 OpuA, OpuC, OpuD로 glycine betaine를 수송한다(Bremer and Krämer, 2000; Bremer, 2002; Ziegler, 2010). 이와 같이 Opu 수송체에 의하여 수송된 glycine betaine은 삼투보호제로 작용하여 다양한 염 농도 조건에서도 생장이 지속된다. 적절한 삼투보호제가 없을 경우 삼투조절이 가능한 proline를 합성한다. |
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