Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Transcription level of the ars-1 promoter of Neurospora crassa

Neurospora crassa ars-1 프로모터의 발현율 조사

  • 이병욱 (고신대학교 생명과학과) ;
  • 구상호 (고신대학교 생명과학과)
  • Published : 2003.04.01
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Abstract

The ars gene of the Neurospora crassa encodes arylsulfatase and is expressed under sulfur limitation. An ars-1 promoter(Pars) translationally-fused to a lacZ gene was transformed into the N. crassa RLM 35-35, a his-3 inl strain and integrated into the his-S locus by a single crossover homologous recombination. $\beta$-galactosidase specific activity was measured from mycelia grown in sulfur-limited Vogel's medium. Enzyme activity reached its maximum at 14 hour after the shift to derepressing condition. When activity from homokaryon generated by microconidiation was measured, it was 17% a higher than that from heterokaryon.

Arylsulfatase를 암호화하는 Neurospora crassa의 ars-1 유전자는 황의 결핍에 의해서 발현이 조절된다. lacZ 유전자에 연결된 ars-1 프로모터 (Pars)가 N. crassa RLM 35-35 a his-3 inl 균주에 형질전환되고, 유사 서열 재조합에 의한 단일 교차에 의해서 염색체의 his-3 부위로 도입이 되었다. 황이 결여된 Vogel의 배지에서 자란 균사로부터 $\beta$-galactosidase 활성이 측정되었다. $\beta$-galactosidase 활성은 derepression 조건으로 변환한지 14 시간 후에 최고치를 기록하였다. Microconidiation에 의해서 생산된 homokaryon에서 측정된 활성은 heterokaryon보다 17% 증가가 되었음을 보여주었다. 이 실험은 ars-1 프로모터의 발현율을 측정할 수 있는 한 방법을 제시한 것으로, 보다 수월한 ars-1 발현 조절 연구가 기능할 것이다.

Keywords

References

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