리그닌분해(分解)와 리그닌분해효소(分解酵素) 생산(生産)을 위한 목재부후균(木材腐朽菌)의 선발(選拔)과 평가(評價) (III) -리그닌분해균(分解菌) LSK-27에 의한 Manganese peroxidase 생산조건(生産條件)-

Screening and Evaluating of Wood-Rotting Fungi for Lignin Degradation and Ligninolytic Enzyme Production (III) - Conditions of Manganese Peroxidase Production by Lignin-Degrading Fungus LSK-27 -

리그닌분해균 LSK-27 균주로부터 Manganese peroxidase (MnP) 생산을 위한 배지조건과 Mn(II) 첨가효과를 검토하였다. LSK-27균주에 의한 균체외 MnP 생산에는 탄소원보다 질소원의 영향이 크게 나타났다. 질소원으로는 peptone 이나 yeast extract와 같은 복합 유기질소원이 효과적이었으며 특히 질소원의 농도가 높은 조건에서 MnP activity가 우수하였다. 질소원으로서 peptone 농도 1.0%까지는 뚜렷한 activity 증가를 가져왔으나 1.5%이상의 농도에서는 MnP activity 증가효과가 크게 나타나지 않았다. 반면에 탄소원의 농도에 의한 MnP activity 증가효과는 glucose농도 1.0% 에서 3.0%까지 거의 비슷한 수준이었다. Mn(II)는 높은 MnP 유도효과를 나타냈으며 첨가농도 100ppm 까지 MnP activity의 증가효과를 보였고 그 이상의 농도에서는 MnP 생산이 억제되었다. Mn(II)는 배양 2일 후에 첨가하였을 때 MnP activitv 증가가 가장 높게 나타났다.

Effects of culture conditions and Mn(II) addition were investigated for production of extracellular manganese peroxidase by lignin-degrading fungus LSK-27, Nitrogen source was shown to more influence the production of extracellular manganese peroxidase by LSK-27 than carbon source. When peptone or yeast extract as nitrogen source was added, high MnP activity was obtained. Especially, nitrogen-sufficient culture condition was effective in MnP activity, showing significantly increase up to 1.0% peptone concentration, but carbon-sufficient was not. Mn(II) was shown to strongly induce the MnP production in culture fluids of LSK-27. Increase of MnP actiyity was obeserved up to addition of 100ppm Mn(II), and over this Mn(II) concentration appeared to be inhibitory. The highest level of MnP activity was attained when Mn(II) was added after 2 day incubation.