In: Biology
What steps are needed to make UMP into dTMP? Write out each step, using standard abbreviations for the nucleotides, and including co-substrates that make sense or are specifically needed (for each step).
Process of conversion of UMP to dTMP takes place in the following steps:
1. Formation of UDP from UMP through the enzyme nucleoside monophosphate kinase by the conversion of ATP to ADP.
UMP+ATP --> UDP + ADP.
2. The conversion of UDP to dUDP by the enzyme ribonucleotide reductase class1. This reduces the carbon at C2 position of the ribose sugar hence converting it to deoxyribose sugar.
UDP+NADPH--->dUDP+NADP+
3. Conversion of the dUDP to dUTP which is catalysed by nucleoside diphosphate kinase coupled to the subsequent conversion of ATP to ADP.
dUDP+ATP--->dUTP + ADP
4. The conversion of dUTP to dUMP by the enzyme dUTP pyrophosphatase.
dUTP +H2O ---> dUMP + PPi
5. The conversion of dUMP to dTMP catalysed by the thymidylaste synthase with N5,N10- methylenetetrahydrofolate as the methyl donor.
dUMP + NA,N10 - methylenetetrahydrofolate ---> dTMP + dihydrofolate.
In this way UMP is converted to dTMP.
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