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De novo UMP synthesis in S. pombe involves six steps and five enzymes.

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posted on 22.03.2013, 03:45 by Yuzy Matsuo, Kouhei Nishino, Kouhei Mizuno, Takashi Akihiro, Takashi Toda, Yasuhiro Matsuo, Tomohiro Kaino, Makoto Kawamukai

The de novo synthesis of UMP in S. pombe is outlined. Ura1 is a bi-functional enzyme consisting of carbamoyl phosphate synthetase I and aspartate transcarbamoylase, Ura2 is dihydroorotase, Ura3 is dihydroorotate dehydrogenase that requires quinone as a cofactor and localizes in mitochondria, Ura5 is orotate phosphoribosyltransferase, and Ura4 is OMP decarboxylase.

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