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The prokaryotic expression system was employed in order to compare the catalytic properties of L183Q mutation and wild DAHP synthase enzyme. The gene of L183Q mutation and wild DAHP synthase enzyme was cloned and expressed by pET vector system and Eco.li BL21. The specific activity of the two recombinant enzyme was determinated. The result show that the relative activity of wild and L183Q mutation is 2.4u/mg and 3.6u/mg, respectively. But the optimal pH and temperature difference between wild and mutation DAHP synthase enzyme is not significant (p>0.05).

Characterization of DAHP Synthase L183Q Mutation Comparison to Wild One by Prokaryotic Expression System