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Thymidine kinase enzyme variants in Physarum polycephalum. Kinetics and properties of the enzyme variants. 1979

P Gröbner

Thymidine kinase variants of Physarum polycephalum separated by repeated DEAE-cellulose chromatography have been characterized. The enzyme variants show similar catalytic properties (e.g., substrate specificity, pH optimum) and molecular weights, as judges by their sedimentation in sucrose gradients. However, they differ significantly with respect to pI, inhibition by dTTP and thermostability, and they have slightly different Km values for deoxythymidine as a substrate.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D008970 Molecular Weight The sum of the weight of all the atoms in a molecule. Molecular Weights,Weight, Molecular,Weights, Molecular
D010804 Physarum A genus of protozoa, formerly also considered a fungus. Characteristics include the presence of violet to brown spores. Physarums
D003854 Deoxyribonucleotides A purine or pyrimidine base bonded to a DEOXYRIBOSE containing a bond to a phosphate group. Deoxyribonucleotide
D012265 Ribonucleotides Nucleotides in which the purine or pyrimidine base is combined with ribose. (Dorland, 28th ed) Ribonucleoside Phosphates,Ribonucleotide,Phosphates, Ribonucleoside
D013379 Substrate Specificity A characteristic feature of enzyme activity in relation to the kind of substrate on which the enzyme or catalytic molecule reacts. Specificities, Substrate,Specificity, Substrate,Substrate Specificities
D013937 Thymidine Kinase An enzyme that catalyzes the conversion of ATP and thymidine to ADP and thymidine 5'-phosphate. Deoxyuridine can also act as an acceptor and dGTP as a donor. (From Enzyme Nomenclature, 1992) EC 2.7.1.21. Deoxythymidine Kinase,Deoxypyrimidine Kinase,Kinase, Deoxypyrimidine,Kinase, Deoxythymidine,Kinase, Thymidine
D014644 Genetic Variation Genotypic differences observed among individuals in a population. Genetic Diversity,Variation, Genetic,Diversity, Genetic,Diversities, Genetic,Genetic Diversities,Genetic Variations,Variations, Genetic

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