Journal
CLINICAL MICROBIOLOGY AND INFECTION
Volume 14, Issue 3, Pages 286-288Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1469-0691.2007.01904.x
Keywords
detection; enterovirus 71; immunodominant linear epitope; pepscan analysis; recombinant GST-SP32 fusion protein; synthetic peptide
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A major IgG-specific immunodominant VP1 linear epitope of enterovirus 71 (EV71) strain 41 (5865/SIN/00009), defined by the core sequence LEGTTNPNG, was identified by Pepscan analysis. Oligonucleotides corresponding to the amino-acid sequence of synthetic peptide SP32 were cloned and over-expressed in Escherichia coli as a recombinant glutathione-S-transferase (GST)-SP32 fusion protein. In ELISAs, this protein did not react with human anti-EV71 IgG antibodies, but there was significant immunoreactivity according to western blot analysis. The amino-acid sequence of SP32 was highly specific for detecting EV71 strains in western blot analysis, and showed no immunoreactivity with monoclonal antibodies raised against other enteroviruses, e.g., CA9 and Echo 6.
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