미생물학회지 (Korean Journal of Microbiology)

  • 제54권3호
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  • Pages.266-271
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  • 2018
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  • 0440-2413(pISSN)
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  • 2383-9902(eISSN)
한국미생물학회 (The Microbiological Society of Korea)
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글루탐산을 유일한 탄소 원과 질소 원으로 이용하는 Acinetobacter sp. B-W의 글루탐산으로부터의 시드로포어 생산에 미치는 플라스미드 제거 효과

Effect of plasmid curing on the production of siderophore from glutamic acid as both carbon and nitrogen sole sources in Acinetobacter sp. B-W

  • 김경자 (순천향대학교 생명시스템학과) ;
  • 이재림 (순천향대학교 생명시스템학과) ;
  • 양용준 (상명대학교 식물식품공학과)
  • Kim, Kyoung-Ja (Department of Life Science and Biotechnology, College of Natural Science, Soonchunhyang University) ;
  • Lee, Jae-Rim (Department of Life Science and Biotechnology, College of Natural Science, Soonchunhyang University) ;
  • Yang, Yong-Joon (Department of Plant and Food Science, Sangmyung University)
  • 투고 : 2018.05.16
  • 심사 : 2018.08.17
  • 발행 : 2018.09.30
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초록

플라스미드가 제거된 Acinetobacter sp. B-W 균주의 돌연변이체를 글루탐산을 유일한 탄소 원과 질소원으로 함유한 배지에 $28^{\circ}C$에서 배양한 결과 글루탐산으로부터의 시드로포어 생산이 억제되었다. B-W 원 균주의 20 kb 플라스미드를 가진 형질 전환체 대장균 $DH5{\alpha}$는 같은 조건의 배지에서 시드로포어를 생산하는 것으로 조사되었다. 그러나 $36^{\circ}C$에서는 형질 전환체 대장균 $DH5{\alpha}$의 시드로포어 생산이 강하게 억제되었으며, 돌연변이체 B-W 균주는 $28^{\circ}C$에서와 마찬가지로 $36^{\circ}C$에서도 시드로포어를 생산하지 못하였다. 형질 전환체로부터 생산된 시드로포어의 종류는 원 균주 B-W와 마찬가지로 Arnow 시험 결과 카테콜 형으로 조사되었으며, $10{\mu}M\;FeCl_3$를 첨가한 배지에서는 시드로포어 생산이 완전히 억제되었다. 형질전환체로부터 생산된 시드로포어의 TLC상에서의 Rf값은 butanol-acetic acid-water (12:3:5) 용매상에서 0.32로 원 균주 B-W에서 생산된 시드로포어와 같았다. 위와 같은 실험 결과로 글루탐산으로부터 생산된 시드로포어의 생합성에 관여하는 유전자들이 20 kb 플라스미드 상에 있는 것으로 추정되었다.

Effect of plasmid curing of Acinetobacter sp. B-W on the production of siderophore from glutamic acid as both carbon and nitrogen sole sources was investigated. Plasmid cured mutant of strain B-W lost the ability to produce siderophore from glutamic acid at $28^{\circ}C$. Transformant E. coli $DH5{\alpha}$ harboring 20 kb plasmid, that was isolated from wild type of strain B-W produced siderophore from glutamic acid as both carbon and nitrogen sole sources at $28^{\circ}C$, but, not at $36^{\circ}C$. Production of siderophore from glutamic acid by transformant E. coli $DH5{\alpha}$ was completely inhibited by $10{\mu}M\;FeCl_3$. In previous report, catechol nature of siderophore produced from glutamic acid by strain B-W was detected by Arnow test. The siderophore produced from glutamic acid by transformant E. coli $DH5{\alpha}$ was also catechol type. Rf value of siderophore produced from transformant E. coli $DH5{\alpha}$ grown in medium glutamic acid as both carbon and nitrogen sole sources at $28^{\circ}C$ was 0.32 in butanol-acetic acid-water (12:3:5) as developing solvent. Rf value of the siderophore was the same with that of wild type of strain B-W. Thus a single plasmid of 20 kb seemed to be involved in the production of siderophore from glutamic acid.

키워드

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