Crystallization and preliminary crystallographic analysis of the snake muscle fructose 1,6-bisphosphatase

The snake muscle fructose 1,6-bisphosphatase, a typical allosteric enzyme which plays important roles in gluconeogenesis, was crystallized in the presence of polyethylene glycol 3350 and magnesium chloride at pH 8.5. The crystals diffract to 2.3 Å on a rotating-anode X-ray source. The space group was determined to be either P3₁21 or its enantiomorph P3₂21, with unit-cell parameters a = b = 83.7, c = 202.41 Å, α = β = 90 and γ = 120°. There are two subunits in the asymmetric unit. Preliminary molecular-replacement studies indicate that the first enantiomorph is the correct one.