Explain de novo synthesis of UMP. Describe the steps.

Question

08 Feb 2025

Answer :

Word Count : 447

De novo synthesis of UMP (uridine monophosphate), a precursor for the synthesis of RNA, involves the creation of pyrimidine nucleotides from basic metabolic intermediates. The pathway for UMP synthesis is complex, beginning with the formation of the pyrimidine ring and then attaching ribose. The process is highly regulated and occurs in the cytoplasm of the cell.

The first step in de novo UMP synthesis is the formation of carbamoyl phosphate, which involves two reactions. The enzyme carbamoyl phosphate synthetase II (CPS II) catalyzes the conversion of glutamine and bicarbonate into carbamoyl phosphate. This reaction requires ATP and is regulated by the availability of nucleotide precursors. CPS II operates in a multi-step ______ _____ ________ _________ ____ ______ _______.
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