The critical roles of exposed surface residues for the thermostability and halotolerance of a novel GH11 xylanase from the metagenomic library of a saline-alkaline soil

Thermostable and halotolerant GH11 xylanases are highly desirable in various industrial applications but they were rarely characterized. In this study, we firstly revealed the genetic diversity of GH11 xylanases from the metagenomic DNA of a saline-alkaline soil by constructing a gene fragment library. Twelve distinct xylanase fragment sequences were identified, which shared 62-96% identity to known GH11 xylanases. Among them, Xyn22 with the...