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Helicobacter pylori Alcohol Dehydrogenase 유전자의 클로닝과 염기서열 결정 Molecular Cloning and Nucleotide Sequence of a Gene Encoding Alcohol Dehydrogenase of Helicobacter pylori
논문 기본 정보
- 저자정보
- 발행연도
- 1998.4
- 수록면
- 129 - 137 (9page)
피인용 0
Helicobacter pylori Alcohol Dehydrogenase 유전자의 클로닝과 염기서열 결정
초록·키워드
Partially purified H. pylori ADH was used to determine the amino acid sequence of ADH N-terminus. The sequence of the ADH N-terminus was determined as MRVQSKGF. The genomic library of H. pylori that has been prepared by pTZ19U plasmid vector was screened with the deduced oligonucleotide probes to select the plasmid clone containing the entire ADH gene. The clone pTZ19U/ADH-6 was selected and its EcoRI-BamHI fragment (1.3 kb) was subcloned into pBluescript II K/S vector to determine nucleotide sequence. The length of H. pylori ADH gene was 1,044 bp. Ribosomal binding site was found in the upstream of start codon and rho-independent transcriptional stop signal was observed in the downstream of stop codon. The ADH gene encodes a protein of 348 amino acids, of which the predicted molecular size and pI value were 38.6 kDa and 7.1, respectively. ADH activity of E. coli transformant of pBluescript/ADH is 10-times greater compared to that of non-transformants. When H. pylori ADH gene was disrupted by pBluescript/ADH-KM whose internal region of 1.3 kb DNA fragment containing ADH gene was replaced by KM resistance sequence, the strain lost the ADH activity completely, despite the normal growth of the strain. This demonstrates that ADH gene is not essential for the viability of H. pylori.
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UCI(KEPA) : I410-ECN-0101-2010-475-003046777
