Single-base resolution localization analysis method for 5-carboxycytosine modification in DNA assisted by deaminase
A carboxylcytosine and analysis method technology, which is applied in the field of 5-carboxycytosine modified single base resolution localization analysis, can solve the problems of increasing purification steps, DNA loss and the like, achieves high deamination efficiency, is easy to operate, and is conducive to localization The effect of analysis
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[0045] Standard Synthetic DNA Analysis
[0046] Commercially synthesized DNA 100ng containing C, 5-mC, 5-hmC, 5-fC and 5-caC, respectively, was added with a certain amount of APOBEC3A protein (according to the actual activity of the APOBEC3A protein used to determine the most suitable deamination concentration ), 2 μL of 250 mM HEPES, add deionized water to make the reaction system 20 μL, and incubate in a 37°C water bath for 2 hours. This was followed by incubation for 10 minutes in a 90°C water bath.
[0047] The above reaction DNA was taken for polymerase chain amplification reaction. Reaction system: 2 μL of 10x amplification buffer, 1 μL of 10 μmol / L forward and reverse primers, 5 ng of template DNA, 10 U of taq DNA polymerase final concentration, add deionized water to make the system 20 μL. The annealing temperature of the amplification reaction is selected according to different regions; the amplification cycle time program: (1) denaturation at 95°C for 5min; (2) den...
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