Crystallization and X-ray structure determination of a thermoalkalophilic lipase from Geobacillus SBS-4S

A thermoalkalophilic lipase (LIP_SBS) from the newly isolated Geobacillus strain SBS-4S which hydrolyzes a wide range of fatty acids has been characterized. In the present study, the crystallization of purified LIP_SBS using the sitting-drop vapour-diffusion method and its X-ray diffraction studies are described. The crystals belonged to the orthorhombic space group P2₁2₁2₁, with unit-cell parameters a = 55.13, b = 71.75, c = 126.26 Å. The structure was determined at 1.6 Å resolution by the molecular-replacement method using the lipase from G. stearothermophilus L1 as a model.