A GH10 xylanase GthC5Xyl obtained from Geobacillus thermodenitrificans C5 when expressed in Escherichia coli, depicted
improved properties like adaptability and stability at a broad range of pH. However, its ability to remain stable at temperature above 60 ◦C was poor.
In order to amplify its industrial utilization, it was essential to enhance GthC5Xyl’s thermal properties.
In our study, a thermostable recombinant xylanase GthC5Xyl was the developed by introduction of proline at its C terminus through rational engineering. Recombinant xylanase GthC5ProXyl expressed in Escherichia coli depicted higher temperature optima (70 ◦C). To the best of our knowledge, this is the first report where C-terminus modification of recombinant xylanase from G. thermodenitrificans with proline and its effect on thermostability was studied