Effects of the Escherichia coli sfsA gene on mal genes expression and a DNA binding activity of SfsA.
The sfsA gene was identified as one of the sfs genes the over-expression of which stimulates maltose fermentation of the Mal- Escherichia coli strain MK2001 (crp*1, cya:Km(r)). Expression from the malPQ promoter, which was measured using a chromosomally integrated malPp-lacZ fusion, was induced by over-expressing the sfsA gene in the crp*1, cya:Km(r) strain. The level of the MalE protein was increased in crp*1, cya:Km(r) cells over-producing SfsA. The SfsA protein was purified to homogeneity and tested for DNA binding activity. The purified SfsA protein binds to DNA non-specifically. All these results may suggest that SfsA functions as a DNA binding protein to induce the mal genes in coordination with CRP*1.
Department of Life Science and Biotechnology, Shimane University, Matsue, Japan.
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Takeda
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Akimoto
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Kawamukai
D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D004269:DNA, Bacterial / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism*; D029968:Escherichia coli Proteins; D005285:Fermentation; D005786:Gene Expression Regulation; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial; D008320:Maltose / Q000378:metabolism*; D008969:Molecular Sequence Data; D011401:Promoter Regions, Genetic / Q000235:genetics; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism
D001426:Bacterial Proteins; D004269:DNA, Bacterial; D004268:DNA-Binding Proteins; D029968:Escherichia coli Proteins; D011993:Recombinant Fusion Proteins; C432590:SfsA protein, E coli; D008320:Maltose