Novel technology for full cellular biosynthetic deoxyribonucleoside triphosphate
A technology of deoxynucleoside triphosphate and deoxynucleoside monophosphate, which is applied in the field of synthesizing deoxynucleoside triphosphate dNTP, can solve the problems of complex preparation, high cost, and large pollution, and achieve reduced environmental pollution, low cost, and small pollution Effect
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[0034] Example 1:
[0035] Yeast culture medium (g / L): glucose 40, urea 2.0, potassium dihydrogen phosphate 1.5, magnesium sulfate heptahydrate 0.5, zinc sulfate heptahydrate 4.0×10 -3 , Ferrous sulfate heptahydrate 3.0×10 -3 , Manganese chloride tetrahydrate 0.3×10 -3 , Anhydrous calcium chloride 1.0×10 -3 , Biotin 0.05×10 -3 . The inoculation amount of Saccharomyces cerevisiae was 10%, cultured on a shaker at 120 rpm at 30°C for 24 hours, and centrifuged at 4000 rpm for 20 minutes. Take the yeast paste and store at -7°C for later use.
[0036] The yeasts used in the following examples are all cultured in the above-mentioned culture method.
Example Embodiment
[0037] Example 2: Preparation of dATP using dAMP.
[0038] Prepared in a beaker with a capacity of 500mL from dAMP 1.49mmol, glucose 0.072mol, baker's yeast puree 100g, magnesium sulfate 14.96mmol, sodium dihydrogen phosphate 0.036mol, glycerol 3mL, cetyltrimethylamine and ammonium bromide 0.3 300 mL of the reaction solution consisting of g and water, adjusted to pH 7.0 with sodium hydroxide, stirred at 30°C for 6 hours at low speed, after the reaction, precipitated with perchloric acid, quantitatively analyzed dATP by HPLC, the conversion solution Containing 2.59g / L of dATP, the yield of dATP reaches 93.6% (in mol).
Example Embodiment
[0039] Example 3: Preparation of dATP using dAMP.
[0040] In a beaker with a capacity of 500 mL, prepare 300 mL of a reaction solution consisting of 1.66 mmol of dAMP, 0.08 mol of glucose, 110 g of air-dried baker’s yeast paste, 8.05 mmol of potassium chloride, 0.036 mol of sodium dihydrogen phosphate, 3 mL of acetaldehyde and water. Adjust the pH to 7.0 with sodium hydroxide, and stir the reaction at low speed at 30℃ for 6 hours. After the reaction, precipitate with perchloric acid and quantitatively analyze dATP by HPLC. The conversion solution contains 2.85g / L of dATP. The rate reached 92.4% (by mol).
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