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논문 기본 정보

자료유형
학술대회자료
저자정보
Park, Soo-Min (Institute for Molecular Biology and Genetics, Seoul National University) Joe, Myung-Kuk (Institute for Molecular Biology and Genetics, Seoul National University) Hong, Choo-Bong (Institute for Molecular Biology and Genetics, Seoul National University)
저널정보
한국식물학회 한국식물학회 학술발표대회 한국식물학회 1999년도 춘계학술발표대회:발표논문요지록
발행연도
1999.1
수록면
18 - 18 (1page)

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초록· 키워드

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We characterized a cDNA clone for a low molecular weight heat-shock protein (LMW HSP) from tobacco named TLHS-l. Nucleotide sequence determination of TLHS-1 identified an open reading frame for 159 amino acids. To the upstream of the open reading frame, a sequence of 124 nucleotides was determined. To the 3' downstream of the open reading frame, 212 nucleotides were identified which carried poly(A)-tail. Comparison of the open reading frame and hydropathy plot of TLHS-1 with the previously reported class I LMW HSPs showed high identity which classified TLHS-1 as a class I LMW HSP cDNA clone. We proposed that there are six consensus regions in class I LMW HSPs. RNA blot hybridization for TLHS-1 showed a typical expression pattern of heat-shock-inducible gene from three common tobacco cultivars. The open reading frame of TLHS-1 was overexpressed in Escherichia coli. TLHS-1 protein confers thermal protection of other proteins in vitro and in vivo. Thermal induced aggregation of citrate synthase was reduced by purified TLHS-1 protein, and thermal death rate at $50^{\circ}C$ was reduced in E. coli expressing TLHS-l. From these data, we can expect that TLHS-1 acts as a molecular chaperone.perone.

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