Xylan의 효소적 가수분해는 고부가가치 기능성 물질 또는 바이오에너지 생산을 위한 발효성 당을 얻는 가장 유용한 방법 중 하나이다. endo-${\beta}$-Xylanase는 xylan 주사슬 내부의 ${\beta}$-1,4-결합...
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https://www.riss.kr/link?id=A103031226
남경화 (충북대학교) ; 장명운 (충북대학교) ; 김민정 (충북대학교) ; 이정민 (충북대학교) ; 이민재 (충북대학교) ; 김태집 (충북대학교) ; Nam, Gyeong-Hwa ; Jang, Myoung-Uoon ; Kim, Min-Jeong ; Lee, Jung-Min ; Lee, Min-Jae ; Kim, Tae-Jip
2016
Korean
KCI등재,SCOPUS
학술저널
463-470(8쪽)
0
0
상세조회0
다운로드국문 초록 (Abstract)
Xylan의 효소적 가수분해는 고부가가치 기능성 물질 또는 바이오에너지 생산을 위한 발효성 당을 얻는 가장 유용한 방법 중 하나이다. endo-${\beta}$-Xylanase는 xylan 주사슬 내부의 ${\beta}$-1,4-결합...
Xylan의 효소적 가수분해는 고부가가치 기능성 물질 또는 바이오에너지 생산을 위한 발효성 당을 얻는 가장 유용한 방법 중 하나이다. endo-${\beta}$-Xylanase는 xylan 주사슬 내부의 ${\beta}$-1,4-결합을 가수분해하여 xylobiose, xylotriose를 포함한 다양한 XOS를 생산하는 핵심 효소이다. 이들 효소 중에서 glucuronoxylanase GH30은 methylglucuronic acid가 측쇄에 수식된 xylan에 특이적으로 작용한다. 본 연구에서는 Paenibacillus amylolyticus KCTC 3005에서 유래한 2종의 xylan 가수분해효소(PaXN_10과 PaGuXN_30) 유전자를 클로닝하고, Escherichia coli에서 각각 발현시켰다. PaXN_10 (38.7 kDa)은 ${\beta}$-xylanase GH10 계열, PaGuXN_30 (58.5 kDa)은 glucuronoxylanase GH30에 해당하는 효소이며, $50^{\circ}C$와 pH 7.0에서 최대 활성을 나타내었다. 가수분해 특성 연구를 통해 P. amylolyticus가 목질계 glucuronoxylan을 분해하는 효소 시스템을 제안하였다. 세포 외로 분비되는 PaGuXN_30은 glucuroxylan을 가수분해하여 methylglucuronic acid 측쇄를 가지는 다양한 aldouronic acid mixtures를 생성하며, 이러한 분해산물은 세포 내로 이동하여 PaXN_GH10에 의해 xylose, xylobiose와 같은 저분자 XOS로 분해되어 세포 내 대사경로에 이용될 수 있다. 또한 이들 효소의 가수분해특성을 이용하여 다양한 탄수화물 소재 생산이 가능할 것으로 기대한다.
다국어 초록 (Multilingual Abstract)
The enzymatic degradation of xylans is the most versatile way to obtain the high value-added functional compounds or the fermentable sugars for renewable energy. The endo-${\beta}$-xylanases are the major enzymes which hydrolyze the internal ${\beta}$...
The enzymatic degradation of xylans is the most versatile way to obtain the high value-added functional compounds or the fermentable sugars for renewable energy. The endo-${\beta}$-xylanases are the major enzymes which hydrolyze the internal ${\beta}$-1,4-linkages of xylan backbones to produce the mixtures of xylooligosaccharides including xylobiose and xylotriose. Among them, glucuronoxylanase GH30 can exclusively hydrolyze the internal ${\beta}$-1,4-linkages of xylans decorated with methylglucuronic acid branches. In the present study, two xylanolytic enzyme (PaXN_10 and PaGuXN_30) genes were cloned from Paenibacillus amylolyticus KCTC 3005, and expressed in Escherichia coli, respectively. PaXN_10 (38.7 kDa) belongs to the endo-${\beta}$-xylanases GH10 family, while PaGuXN_30 (58.5 kDa) is a member of glucuronoxylanase GH30. They share the same optimal reaction conditions at $50^{\circ}C$ and pH 7.0. Enzymatic characterization proposed that P. amylolyticus can utilize the hardwood glucuronoarabinoxylans via the cooperative actions of xylanases GH10 and GH30. The extracellular PaGuXN_30 is secreted into the medium and hydrolyzes glucuronoarabinoxylans to release a series of aldouronic acid mixtures with a methylglucuronic acid branch. The resultant products being transported into the microbial cell are successively degraded into the smaller xylooligosaccharides by the intracellular PaXN_10, which will be utilized for the cellular metabolism.
참고문헌 (Reference)
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1 Falck, P., "Xylooligosaccharides from hardwood and cereal xylans produced by a thermostable xylanase as carbon sources for Lactobacillus brevis and Bifidobacterium adolescentis" 61 : 7333-7340, 2013
2 Sunna, A., "Xylanolytic enzymes from fungi and bacteria" 17 : 39-67, 1997
3 Collins, T., "Xylanases, xylanase families and extremophilic xylanases" 29 : 3-23, 2005
4 Miller, G. L, "Use of dinitrosalicylic acid reagent for determination of reducing sugar" 31 : 426-428, 1959
5 Andrews, S. R., "The use of forced protein evolution to investigate and improve stability of family 10 xylanases: The production of Ca 2+-independent stable xylanases" 279 : 54369-54379, 2004
6 Gallardo, Ó., "Structural insights into the specificity of Xyn10B from Paenibacillus barcinonensis and its improved stability by forced protein evolution" 285 : 2721-2733, 2010
7 Chaikumpollert, O., "Structural elucidation of hemicelluloses from Vetiver grass" 57 : 191-196, 2004
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Clostridium 속 미생물 대사공학을 통한 butanol 생산
학술지 이력
연월일 | 이력구분 | 이력상세 | 등재구분 |
---|---|---|---|
2023 | 평가예정 | 해외DB학술지평가 신청대상 (해외등재 학술지 평가) | |
2020-01-01 | 평가 | 등재학술지 유지 (해외등재 학술지 평가) | |
2013-12-02 | 학술지명변경 | 외국어명 : The Korean Journal of Microbiology -> Korean Journal of Microbiology | |
2010-01-01 | 평가 | 등재학술지 유지 (등재유지) | |
2008-01-01 | 평가 | 등재학술지 유지 (등재유지) | |
2006-01-01 | 평가 | 등재학술지 유지 (등재유지) | |
2004-01-01 | 평가 | 등재학술지 유지 (등재유지) | |
2001-01-01 | 평가 | 등재학술지 선정 (등재후보2차) | |
1998-07-01 | 평가 | 등재후보학술지 선정 (신규평가) |
학술지 인용정보
기준연도 | WOS-KCI 통합IF(2년) | KCIF(2년) | KCIF(3년) |
---|---|---|---|
2016 | 0.21 | 0.21 | 0.21 |
KCIF(4년) | KCIF(5년) | 중심성지수(3년) | 즉시성지수 |
0.26 | 0.24 | 0.48 | 0.02 |