Structure of a His170Tyr mutant of thermostable pNPPase from Geobacillus stearothermophilus

The crystal structure of the His170Tyr mutant of thermostable pNPPase from Geobacillus stearothermophilus has been determined at 2.0 Å resolution, with Na⁺ and SO₄^2- bound in the active site, showing a half-closed cap conformation.