Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Isolation and Characterization of Xylanase-producing Paenibacillus sp. HY-8 from Moechotypa diphysis

털두꺼비하늘소 (Moechotypa diphysis)로부터 Xylanase를 생산하는 Paenibacillus sp. HY-8 균주의 분리 및 특성

  • 허선연 (한국생명공학연구원 생물자원센터) ;
  • 오현우 (한국생명공학연구원 생물자원센터) ;
  • 박두상 (한국생명공학연구원 생물자원센터) ;
  • 김향미 (한국생명공학연구원 생물자원센터) ;
  • 배경숙 (한국생명공학연구원 생물자원센터) ;
  • 박호용 (한국생명공학연구원 생물자원센터)
  • Published : 2007.08.30
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Abstract

From the course of screening of useful xylanase producing microorganism from a phytophagous longicorn beetle, we isolated an extra-cellular xylanase producing strain, Paenibacillus sp. HY-8 from the intestine of Moechotypa diphysis adult. On the basis of morphological, biochemical and phylogenetic studies of the new isolate was identified as a Paenibacillus species. Production of xylanase in this strain was strongly induced by adding xylan to the growth medium and repressed by glucose or xylose. The highest xylanase production was attained in the M9 media containing 1% yeast extract and 0.5% birchwood xylan when cultured at $25^{\circ}C$ for 24 hrs. HY-8 producing xylanase showed superior hydrolytic activities against various plant source feedstuff than control xylanase produced by Tricoderma sp. at pH 6.0.

Xylan이 풍부한 식물체를 먹이로 하는 하늘소의 장내에 존재하는 xylanase 생산 미생물의 탐색 과정에서 털두꺼비하늘소 (Moechotypa diphysis) 성충의 장으로부터 우수한 xylanase 생산균주 Paenibacillus sp. HY-8을 분리하였다. 생화학적, 계통학적 분석결과를 바탕으로 이 분리균은 Paenibacillus 속에 속하는 종으로 분석되었다. HY-8 균주에서 xylanase 생산은 제한배지에 xylan을 첨가함으로써 유도되는 특성을 나타내었고 1% 의 yeast extract와 0.5%의 birchwood xylan이 포함된 M9 배지에서 $25^{\circ}C$, 24시간의 배양에 의해 xylanase의 생산이 최대치에 도달하였다. HY-8 균주가 생산하는 xylanase는 pH6.0에서 여러 가지 식물성 사료의 원료에 대하여 대조구로 사용된 Tricoderma sp. 유래의 xylanase에 비해 우수한 분해능을 나타내었다.

Keywords

References

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