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Vibrio fluvialis, an enteropathogenic bacterium,produces a phospholipase which is thought to be an importantfactor in the pathogenesis of disease. In this study, thephospholipase gene (vfp) was identified from V. fluvialis(KCTC 2473) and its sequence was determined. The entireopen reading frame was composed of 1,689 nucleotides and563 amino acids. The phospholipase gene (vfp) was overexpressedin Escherichia coli as a his-tag fused protein. This recombinantprotein (rVFP58) was solubilized with 6 M urea and purifiedby Ni-NTA affinity chromatography. The action mode ofrVFP58 was determined by TLC and GC-MS, and it showedphospholipase B activity, which had both phospholipase Aand lysophospholipase activities. The rVFP58 showed amaximum activity at pH around 9- 10 and temperature ofabout 40oC, and it was stable under alkaline condition overpH 9. The cytotoxicity of rVFP58 was evaluated, using a fishcell line, CHSE-214, and was found to cause significant celldeath after 14 h of exposure to 250 μg of the protein.

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