Lee Y H, Olson T W, Ogata C M, Levitt D G, Banaszak L J, Lange A J
Nat Struct Biol. 1997 Aug;4(8):615-8. doi: 10.1038/nsb0897-615.
The crystal structure of the fructose-2,6-bisphosphatase domain trapped during the reaction reveal a phosphorylated His 258, and a water molecule immobilized by the product, fructose-6-phosphate. The geometry suggests that the dephosphorylation step requires prior removal of the product for an 'associative in-line' phosphoryl transfer to the catalytic water.
反应过程中捕获的果糖-2,6-二磷酸酶结构域的晶体结构显示出一个磷酸化的组氨酸258,以及一个被产物果糖-6-磷酸固定的水分子。其几何结构表明,去磷酸化步骤需要在进行“协同线性”磷酰基转移至催化水之前先去除产物。