Abstract
In a bacterial surface display system, the display of a successful recombinant protein is highly dependent on the choice of anchoring motif. In this study, we developed an efficient Escherichia coli display system using novel anchoring motifs derived from the protein YiaT. To determine the best surface-anchoring motif, full-length YiaT and two of its C-terminal truncated forms, cut at the R181 and R232 sites, were evaluated. Two industrial enzymes, a lipase from Pseudomonas fluorescens SIK W1 and an α-amylase from Bacillus subtilis, were used as the target proteins for display. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis, Western blot, immunofluorescence microscopy and whole-cell enzyme activity measurements confirmed the expression of the fusion proteins on the E. coli surface. Using YiaTR181 or YiaTR232 as the anchoring motif, the fusion proteins showed very high enzyme activities and did not exert any adverse effects on either cell growth or the outer membrane integrity. Additionally, these fusion proteins were suitable for displaying proteins of large molecular size in an active form. Compared with the previous anchoring motifs FadL and OprF, YiaTR181 and YiaTR232 had approximately 10-fold and 20-fold higher e...Continue Reading
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Jan 23, 2018·Biotechnology Letters·H D Pardavé-AlejandreC R González-Bonilla
Apr 27, 2019·Biotechnology Letters·Chang-Ye HuiWen Zhang
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