세포벽 분해 관련 효소의 생산균주 분리 및 CMCase의 특성

국문 초록 (Abstract)

CMCase를 생산하는 Klebsiella sp. Sc를 부산 인근의 토양에서 분리하였다. 이 균주는 16S rDNA와 RNA polymerase B subunit (rpoB) 유전자의 유전적 계통 분석을 통하여 동정을 시행하였다. 그 결과 Klebsiella sp. 속들의 균주들과 99% 이상의 상동성을 나타내었다. CMCase 유전자는 Sc의 게놈라이브러리를 구축하여 찾았다. CMCase 유전자는 37,666 Da의 분자량을 가지는 333개의 아미노산을 암호화하고 있는 1,002개의 뉴클레오티드들로 구성된 것으로 밝혀졌다. 추정된 CMCase의 단백질 서열은 Cellulomonas uda와 단백질과 95%의 identity와 97%의 positive를 가지는 것으로 나타났으며, Erwinia chrysanthemi와는 각각 58%와 72%를 가지는 것으로 나타났다. 그리고 CMCase는 ASDGDTLIAWALLRAQ KQW와 같은 보존 영역을 가지고 있었는데, 이는 glycosyl hydrolase family 8의 보존영역(A-[ST]-D-[AG]-D-X(2)-[IM]-A-[SA]-[LIVM]-[LIVMG]-A-X(3)-[FW])와 일치하는 것으로 나타났다. 이는 Klebsiells sp. Sc의 CMCase는 glycosyl hydrolase family 8에 속한다는 것을 나타낸다.

다국어 초록 (Multilingual Abstract)

A CMCase-producing bacterium, Klebsiella sp. Sc, was isolated from Busan area's soil sample. This strain was identified on the basis of phylogenetic analysis of the 16S rDNA and rpoB (RNA polymerase B subunit) sequences. The gene encoding CMCase was cloned by genome library. The CMCase gene consisted of an open reading frame of 1,002 nucleotides and encodes 333 amino acids with a deduced molecular weight of 37,666 Da. The deduced amino acid sequence of the CMCase from Klebsiella sp. exhibits 95% identities and 97% positives to those from Cellulomonas uda and 58% identities and 72% positives to those from Erwinia chrysanthemi. The CMCase contain a conserved motif with the consensus sequence, ASDGDTLI AWALLRAQKQW. This result shows CMCase protein from Klebsiella sp. Sc belongs to glycoside hydrolase family 8, A-[ST]-D-[AG]-D-X(2)-[IM]-A-[SA]-[LIVM]-[LIVMG]-A-X(3)-[FW].

목차 (Table of Contents)

• 서론
• 재료 및 방법
• 결과 및 고찰
• 요약
• 감사의 말
• References

참고문헌 (Reference)

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