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• W2396204082 abstract "대장균 야생주와 프로판올 내성 변이주에서 프로판올 스트레스에 의해 발현이 크게 변화하는 유전자를 DNA microarray 기술을 이용하여 비교 분석하였다. 프로판올 첨가한 야생주와 무첨가한 야생주 사이의 RNA 발현 연관값은 0.949이며, 50개의 유전자 발현이 2배 이상 변화하였다. 프로판올을 첨가한 내성변이주와 무첨가한 변이주 사이의 연관값은 0.952이며, 71개의 유전자 발현이 크게 변화하였다. 그러나, 야생주와 변이주 사이의 연관값은 프로판올 무첨가한 조건과 첨가한 조건에서 각각 0.992 및 0.974로 매우 높았으며, 2배 이상의 발현차이를 나타내는 유전자는 각각 1개 및 2개로, 두 균주는 매우 유사한 발현양상을 보였다. 야생주 또는 변이주에서 프로판올 스트레스에 반응하는 대표적인 유전자들의 특징은 많은 열충격 반응에 관여하는 유전자들의 발현이 크게 증가하였으며, 리보소옴 합성에 필요한 많은 유전자들의 발현이 감소하였다. 또한, 전사조절인자들인 ArcA, CRP, FNR, H-NS, GatR, PurR에 의해 조절받는 유전자들의 발현이 크게 변화하였으며, 시그마인자들 중에서는 RpoH에 의해서 발현되는 유전자들의 발현이 크게 증가하였다. rpoH가 정상적으로 발현되지 못하는 변이주와 야생주를 이용한 프로판올 내성정도를 측정한 결과, RpoH는 대장균에서 프로판올 스트레스에 적응하는데 중요한 기능을 하는 것으로 확인되었다. We compared the transcriptome in response to propanol stress in wild-type and propanol-resistant mutant Escherichia coli using the DNA microarray technique. The correlation value of RNA expression between the propanol-treated wild type and the untreated-one was about 0.949, and 50 genes were differentially expressed by more than twofold in both samples. The correlation value of RNA expression between the propanol-treated mutant and the untreated one was about 0.951, and 71 genes in two samples showed differential expression patterns. However, the values between the wild type and mutant, regardless of propanol addition, were 0.974-0.992 and only 1-2 genes were differentially expressed in the two strains. The representative characteristics among differentially expressed genes in W3110 or P19 treated with propanol compared to untreated samples were up-regulation of hest shock response genes and down-regulation of genes relating to ribosome biosynthesis. In addition, many genes were regulated by transcription regulation factors such as ArcA, CRP, FNR, H-NS, GatR, or PurR and overexpressed by sigma factor RpoH. We confirmed that RpoH mediated an important host defense function in propanol stress in E. coli W3110 and P19 by comparison of cell growth rate among the wild type, rpoH disruptant mutant, and rpoH-complemented strain." @default.
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• W2396204082 date "2012-03-30" @default.
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• W2396204082 title "Transcriptional Analysis Responding to Propanol Stress in Escherichia coli" @default.
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