Inosine monophosphate dehydrogenase from porcine (Sus scrofa domestica) thymus: purification and properties. 1993

M E Pugh, and E B Skibo
Department of Chemistry, Bloomsburg University, PA 17815.

1. IMP dehydrogenase (EC 1.1.1.205) from porcine thymus glands has been purified to homogeneity. 2. The enzyme has a subunit MW of 57 kDa and an amino acid composition similar to those obtained from other normal and cancerous mammalian cells. 3. The apparent Km values at pH 8.0 for IMP and NAD+ are 7 and 16 microM, respectively. 4. GMP, XMP and AMP are competitive inhibitors towards IMP and Ki values of 50, 85 and 282 microM, respectively. 5. The effectiveness of nucleotides to protect inactivation by CI-IMP is IMP > GMP > XMP > AMP.

UI MeSH Term Description Entries
D007168 IMP Dehydrogenase An enzyme that catalyzes the dehydrogenation of inosine 5'-phosphate to xanthosine 5'-phosphate in the presence of NAD. EC 1.1.1.205. Inosinic Acid Dehydrogenase,Inosine-5-Monophosphate Dehydrogenase,Acid Dehydrogenase, Inosinic,Dehydrogenase, IMP,Dehydrogenase, Inosine-5-Monophosphate,Dehydrogenase, Inosinic Acid,Inosine 5 Monophosphate Dehydrogenase
D007291 Inosine Monophosphate Inosine 5'-Monophosphate. A purine nucleotide which has hypoxanthine as the base and one phosphate group esterified to the sugar moiety. IMP,Inosinic Acid,Ribosylhypoxanthine Monophosphate,Inosinic Acids,Sodium Inosinate,Acid, Inosinic,Acids, Inosinic,Inosinate, Sodium,Monophosphate, Inosine,Monophosphate, Ribosylhypoxanthine
D008970 Molecular Weight The sum of the weight of all the atoms in a molecule. Molecular Weights,Weight, Molecular,Weights, Molecular
D009243 NAD A coenzyme composed of ribosylnicotinamide 5'-diphosphate coupled to adenosine 5'-phosphate by pyrophosphate linkage. It is found widely in nature and is involved in numerous enzymatic reactions in which it serves as an electron carrier by being alternately oxidized (NAD+) and reduced (NADH). (Dorland, 27th ed) Coenzyme I,DPN,Diphosphopyridine Nucleotide,Nadide,Nicotinamide-Adenine Dinucleotide,Dihydronicotinamide Adenine Dinucleotide,NADH,Adenine Dinucleotide, Dihydronicotinamide,Dinucleotide, Dihydronicotinamide Adenine,Dinucleotide, Nicotinamide-Adenine,Nicotinamide Adenine Dinucleotide,Nucleotide, Diphosphopyridine
D002851 Chromatography, High Pressure Liquid Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed. Chromatography, High Performance Liquid,Chromatography, High Speed Liquid,Chromatography, Liquid, High Pressure,HPLC,High Performance Liquid Chromatography,High-Performance Liquid Chromatography,UPLC,Ultra Performance Liquid Chromatography,Chromatography, High-Performance Liquid,High-Performance Liquid Chromatographies,Liquid Chromatography, High-Performance
D004591 Electrophoresis, Polyacrylamide Gel Electrophoresis in which a polyacrylamide gel is used as the diffusion medium. Polyacrylamide Gel Electrophoresis,SDS-PAGE,Sodium Dodecyl Sulfate-PAGE,Gel Electrophoresis, Polyacrylamide,SDS PAGE,Sodium Dodecyl Sulfate PAGE,Sodium Dodecyl Sulfate-PAGEs
D004790 Enzyme Induction An increase in the rate of synthesis of an enzyme due to the presence of an inducer which acts to derepress the gene responsible for enzyme synthesis. Induction, Enzyme
D006157 Guanosine Monophosphate A guanine nucleotide containing one phosphate group esterified to the sugar moiety and found widely in nature. 5'-Guanylic Acid,Guanosine 5'-Monophosphate,5'-GMP,Guanylic Acid,5' Guanylic Acid,5'-Monophosphate, Guanosine,Acid, 5'-Guanylic,Acid, Guanylic,Guanosine 5' Monophosphate,Monophosphate, Guanosine
D006863 Hydrogen-Ion Concentration The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH pH,Concentration, Hydrogen-Ion,Concentrations, Hydrogen-Ion,Hydrogen Ion Concentration,Hydrogen-Ion Concentrations
D000249 Adenosine Monophosphate Adenine nucleotide containing one phosphate group esterified to the sugar moiety in the 2'-, 3'-, or 5'-position. AMP,Adenylic Acid,2'-AMP,2'-Adenosine Monophosphate,2'-Adenylic Acid,5'-Adenylic Acid,Adenosine 2'-Phosphate,Adenosine 3'-Phosphate,Adenosine 5'-Phosphate,Adenosine Phosphate Dipotassium,Adenosine Phosphate Disodium,Phosphaden,2' Adenosine Monophosphate,2' Adenylic Acid,5' Adenylic Acid,5'-Phosphate, Adenosine,Acid, 2'-Adenylic,Acid, 5'-Adenylic,Adenosine 2' Phosphate,Adenosine 3' Phosphate,Adenosine 5' Phosphate,Dipotassium, Adenosine Phosphate,Disodium, Adenosine Phosphate,Monophosphate, 2'-Adenosine,Phosphate Dipotassium, Adenosine,Phosphate Disodium, Adenosine

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