1. Cloning, expression, and genus-specificity analysis of 28-kDa OmpK from Vibrio alginolyticus.
- Author
-
Li YD, Ren HL, Lu SY, Zhou Y, Han X, Gong BB, Zhang YY, and Liu ZS
- Subjects
- Amino Acid Sequence, Bacterial Outer Membrane Proteins chemistry, Bacterial Outer Membrane Proteins immunology, Bacterial Vaccines, Base Sequence, Cross Reactions, Genes, Bacterial, Molecular Sequence Data, Molecular Weight, Phylogeny, Protein Sorting Signals, Recombinant Fusion Proteins biosynthesis, Recombinant Fusion Proteins immunology, Recombinant Fusion Proteins isolation & purification, Sequence Alignment, Sequence Analysis, DNA, Species Specificity, Vibrio genetics, Vibrio immunology, Vibrio isolation & purification, Vibrio metabolism, Vibrio Infections diagnosis, Vibrio Infections prevention & control, Vibrio alginolyticus immunology, Vibrio alginolyticus isolation & purification, Bacterial Outer Membrane Proteins genetics, Bacterial Outer Membrane Proteins metabolism, Cloning, Molecular, Gene Expression, Vibrio alginolyticus genetics, Vibrio alginolyticus metabolism
- Abstract
Some Vibrio species are universal marine pathogens and Vibrio infections are often encountered due to consumption of raw or uncooked seafood. The outer membrane proteins, playing a key role in interaction between bacteria and hosts, are potential candidates for development of vaccine and markers of the genus Vibrio. In this study, the ompK (outer membrane protein K) genes of Vibrio alginolyticus, V. vulnificus, V. parahaemolyticus, V. fluvialis, and V. mimicu were cloned with 798 to 822 nucleotides encoding 266 to 274 amino acids. The ompK gene from V. alginolyticus was expressed in Escherichia coli using pET-22b expression vector. The recombinant fusion OmpK protein with 6xHis tag was purified with nickel chelate affinity chromatography. The polyclonal antibody (titer, 1:102400) against V. alginolyticus OmpK was developed in guinea pigs and it positively reacted with each of 5 Vibrio species but negative to other 18 Gram-negative bacterial strains. The result suggests that Vibrio OmpK protein could be a genus-specific antigen, which can be used for developing vaccines and rapid detection of multiple Vibrio species.
- Published
- 2010
- Full Text
- View/download PDF