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논문 상세정보

송곳니구름버섯(Irpex zonatus) BN2에 의한 아조계, 트리페닐메탄계 및 헤테로싸이클릭계 염료의 탈색

Decolorization of Azo, Triphenylmethane and Heterocyclic Dyes by Irpex zonatus BN2

초록

우리 나라 자연 환경에서 분리 동정된 송곳니구름버섯(Irpex zonatus) BN2 균주의 리그닌분해효소활성과 아조(azo)계, 트리페닐메탄(triphenylmethane)계 및 헤테로싸이클릭(heterocyclic)계에 속하는 몇몇 염료의 탈색능을 조사하였다. 송곳니구름버섯 BN2 균주는 lignin peroxidase(LiP)와 veratryl alcohol oxidase(VAO)를 생산하지 않고 laccase와 manganese dependent peroxidase(MnP)를 생산했다. MnP는 배양 3일부터 생산되었으나 효소활성은 매우 낮았다. 반면 laccase는 배양 초기부터 지속적으로 생산되었고 활성은 대단히 높았다. 균주를 염료와 함께 10일간 배양했을 때 아조계 염료인 orange II, orange G, tropaeolin O 및 congo red의 탈색율은 각각 98.0%, 97.4%, 99.0% 및 95.3%로 나타났고 트리페닐메탄계 염료인 basic fuchsin, malachite green 및 crystal violet 들은 98.5%, 95.7% 및 99.4%로, 헤테로싸이클릭계 염료에 속하는 eosin Y, toludine blue, methyl blue 및 azur B는 각각 97.4% 98.7%, 99.9% 및 94.0%의 탈색율을 보였다. 송곳니구름버섯 BN2 균주에 의한 염료의 탈색은 주로 laccase에 의하여 이루어진다고 생각된다.

Abstract

The present research was undertaken to investigate the activity of ligninolytic enzymes and the decolorization capability of some dyes with Irpex zonatus BN2, isolated from nature and identified. For the assay of enzyme activities, the isolate did not produce lignin peroxidase (LiP) and veratryl alcohol oxidase (VAO), but laccase and manganese dependent peroxidase (MnP). While the activity for MnP was low $(61.6\;nmol/mg{\cdot}protein)$, its laccase activity was very high $(1185.9\;nmol/mg{\cdot}protein)$. Moreover, laccase had appeared earlier than MnP. When the isolate was incubated with each dye for 10 days, the decolorization rates of azo dyes, such as orange II, orange G, tropaeolin O and congo red were 98.0%, 97.4%, 99.0% and 95.3%, respectively. In case of heterocyclic dyes, eosin Y, toludine blue, methyl blue and azur B were 97.4 %, 98.7%, 99.9% and 94.0% respectively. Finally the results of triphenylmethane dye such as basic fuchsin, malachite green and crystal violet were 98.5%, 95.7% and 99.4%, respectively. The results suggest that laccase of Irpex zonatus BN2 should be played an important role in the decolorization of the dyes.

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참고문헌 (24)

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