Ammonia → Coenzyme A

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반응 단계

Palmitoyl CoA (10 mg) and 1 mg of L-serine were dissolved in 5 mL of 100 mM HEPES-NaOH buffer (containing 10 μM PLP; pH 8.0) and well stirred using a magnetic stirrer. While the stirring speed was reduced to such an extent that a mild mixing was resulted, 0.5 mL of a crude SPT enzyme solution was added and the mixture was made to react at 37° C. for 24 hours. The solution was made alkaline with 1 mL of 2N ammonia solution and the product in the solution was extracted and recovered with 5 mL of chloroform/methanol (2:1, (v/v)). The extract liquid was filtered, concentrated appropriately and analyzed by the same manner as in Example 3 whereupon the produced amount of 3-ketodihydrosphingosine was about 0.02 mg.

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