Subcellular Localization of the Pathway of de Novo Pyrimidine Nucleotide Biosynthesis in Pea Leaves | Zendy

Holly Doremus | Zendy; André T. Jagendorf | Zendy

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Subcellular Localization of the Pathway of de Novo Pyrimidine Nucleotide Biosynthesis in Pea Leaves

Author(s) -

Holly Doremus,

André T. Jagendorf

Publication year - 1985

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.79.3.856

Subject(s) - dihydroorotate dehydrogenase , pyrimidine metabolism , aspartate carbamoyltransferase , chloroplast , biochemistry , nucleotide , biosynthesis , pisum , biology , transferase , enzyme , dehydrogenase , subcellular localization , pyrimidine , adenine phosphoribosyltransferase , plastid , cytoplasm , purine , gene , allosteric regulation

The subcellular distribution of the enzymes of de novo pyrimidine nucleotide biosynthesis was investigated in pea (Pisum sativum L. cv Progress No. 9) leaves. Aspartate carbamoyltransferase, the committed step of the pathway, was found to be strictly confined to the chloroplasts. Dihydro-orotase, orotate phosphoribosyl transferase, and orotidine decarboxylase activities were also found only in the plastids. The remaining enzyme of the pathway, dihydroorotate dehydrogenase, was shown to be mitochondrial.

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