BIOMAT Database Logo BIOMAT Database Logo

Rapid conversion of newly-synthesized orotate to uridine-5-monophosphate by rat liver cytosolic enzymes. 1983

K N Dileepan, and J Kennedy

It had been noted previously that the activity of mitochondrial dihydroorotate dehydrogenase was lower in crude tissue preparations containing cytosol than in isolated mitochondria. Closer examination reveals that the apparent lower enzyme activity is due to rapid conversion of newly-synthesized orotate to uridine-5-monophosphate by the cytosolic enzymes, orotate phosphoribosyltransferase and orotidylate decarboxylase.

UI MeSH Term Description Entries
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D008297 Male Males
D008930 Mitochondria, Liver Mitochondria in hepatocytes. As in all mitochondria, there are an outer membrane and an inner membrane, together creating two separate mitochondrial compartments: the internal matrix space and a much narrower intermembrane space. In the liver mitochondrion, an estimated 67% of the total mitochondrial proteins is located in the matrix. (From Alberts et al., Molecular Biology of the Cell, 2d ed, p343-4) Liver Mitochondria,Liver Mitochondrion,Mitochondrion, Liver
D009962 Orotate Phosphoribosyltransferase The enzyme catalyzing the formation of orotidine-5'-phosphoric acid (orotidylic acid) from orotic acid and 5-phosphoribosyl-1-pyrophosphate in the course of pyrimidine nucleotide biosynthesis. EC 2.4.2.10. Orotidine-5'-Phosphate Pyrophosphorylase,Orotidylic Acid Phosphorylase,OMPase,Orotidine-5'-Monophosphate Phosphohydrolase,Orotidine 5' Monophosphate Phosphohydrolase,Orotidine 5' Phosphate Pyrophosphorylase,Phosphohydrolase, Orotidine-5'-Monophosphate,Phosphoribosyltransferase, Orotate,Phosphorylase, Orotidylic Acid,Pyrophosphorylase, Orotidine-5'-Phosphate
D009963 Orotic Acid An intermediate product in PYRIMIDINE synthesis which plays a role in chemical conversions between DIHYDROFOLATE and TETRAHYDROFOLATE. Potassium Orotate,Sodium Orotate,Zinc Orotate,Acid, Orotic,Orotate, Potassium,Orotate, Sodium,Orotate, Zinc
D009964 Orotidine-5'-Phosphate Decarboxylase Orotidine-5'-phosphate carboxy-lyase. Catalyzes the decarboxylation of orotidylic acid to yield uridylic acid in the final step of the pyrimidine nucleotide biosynthesis pathway. EC 4.1.1.23. Orotidine Phosphate Carboxy-Lyase,Orotidylate Decarboxylase,OMP Decarboxylase,Orotidine 5 Phosphate Decarboxylase,Orotidine 5' Phosphate Decarboxylase,Orotidine-5-Phosphate Decarboxylase,Carboxy-Lyase, Orotidine Phosphate,Decarboxylase, OMP,Decarboxylase, Orotidine-5'-Phosphate,Decarboxylase, Orotidine-5-Phosphate,Decarboxylase, Orotidylate,Orotidine Phosphate Carboxy Lyase,Phosphate Carboxy-Lyase, Orotidine
D010430 Pentosyltransferases Enzymes of the transferase class that catalyze the transfer of a pentose group from one compound to another.
D010754 Phosphoribosyl Pyrophosphate The key substance in the biosynthesis of histidine, tryptophan, and purine and pyrimidine nucleotides. Pyrophosphate, Phosphoribosyl
D011919 Rats, Inbred Strains Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding. August Rats,Inbred Rat Strains,Inbred Strain of Rat,Inbred Strain of Rats,Inbred Strains of Rats,Rat, Inbred Strain,August Rat,Inbred Rat Strain,Inbred Strain Rat,Inbred Strain Rats,Inbred Strains Rat,Inbred Strains Rats,Rat Inbred Strain,Rat Inbred Strains,Rat Strain, Inbred,Rat Strains, Inbred,Rat, August,Rat, Inbred Strains,Rats Inbred Strain,Rats Inbred Strains,Rats, August,Rats, Inbred Strain,Strain Rat, Inbred,Strain Rats, Inbred,Strain, Inbred Rat,Strains, Inbred Rat
D002262 Carboxy-Lyases Enzymes that catalyze the addition of a carboxyl group to a compound (carboxylases) or the removal of a carboxyl group from a compound (decarboxylases). EC 4.1.1. Carboxy-Lyase,Decarboxylase,Decarboxylases,Carboxy Lyase,Carboxy Lyases

Related Publications

K N Dileepan, and J Kennedy
Conversion of uracil and orotate to uridine 5'-phosphate by enzymes in lactobacilli.
June 1957, The Journal of biological chemistry,
K N Dileepan, and J Kennedy
Compartmentalization of uridine and uridine 5'-monophosphate in rat liver slices.
August 1973, The Journal of biological chemistry,
K N Dileepan, and J Kennedy
Factors influencing synthesis of uridine-5'-monophosphate in rat liver.
June 1962, Nature,
K N Dileepan, and J Kennedy
Biosynthesis of uridine-5'-monophosphate in rat liver and Morris hepatomas.
January 1974, Advances in enzyme regulation,
K N Dileepan, and J Kennedy
Enzymes of uridine 5'-monophosphate biosynthesis in Schistosoma mansoni.
June 1984, Molecular and biochemical parasitology,
K N Dileepan, and J Kennedy
Conversion of nucleoside to sedoheptulose monophosphate by rat liver.
May 1959, The Journal of biological chemistry,
K N Dileepan, and J Kennedy
A nonradioactive high-performance liquid chromatographic microassay for uridine 5'-monophosphate synthase, orotate phosphoribosyltransferase, and orotidine 5'-monophosphate decarboxylase.
December 2001, Analytical biochemistry,
K N Dileepan, and J Kennedy
Augmentation of uridine diphosphate glucuronyltransferase activity in rat liver by adenosine 3',5'-monophosphate.
September 1978, Gastroenterology,
K N Dileepan, and J Kennedy
Isolation and initial characterization of the single polypeptide that synthesizes uridine 5'-monophosphate from orotate in Ehrlich ascites carcinoma. Purification by tandem affinity chromatography of uridine-5'-monophosphate synthase.
September 1980, Biochemistry,
K N Dileepan, and J Kennedy
Rapid conversion of tea catechins to monomethylated products by rat liver cytosolic catechol-O-methyltransferase.
December 2001, Xenobiotica; the fate of foreign compounds in biological systems,
Copied contents to your clipboard!