Antizyme to ornithine decarboxylase is present in the liver of starved rats.
Antizyme to ornithine decarboxylase (ODC) and ODC-antizyme complex were both present in liver cytosols of starved rats. The antizyme was identified by its molecular weight, kinetic properties, formation of a complex with ODC, and reversal of its inhibition by antizyme inhibitor. The average amount of antizyme in liver cytosols of starved rats was 0.1 unit/mg of protein, roughly corresponding to basal hepatic ODC activity in rats fed ad libitum. The presence of ODC-antizyme complex was detected by using antizyme inhibitor. These results indicate that antizyme participates in the regulation of ODC activity in vivo under physiological conditions.
D000818:Animals; D002850:Chromatography, Gel; D003600:Cytosol / Q000201:enzymology; D066298:In Vitro Techniques; D007700:Kinetics; D008099:Liver / Q000201:enzymology*; D046911:Macromolecular Substances; D008297:Male; D008970:Molecular Weight; D065108:Ornithine Decarboxylase Inhibitors; D011506:Proteins / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D013217:Starvation / Q000201:enzymology
D046911:Macromolecular Substances; D065108:Ornithine Decarboxylase Inhibitors; D011506:Proteins; C031017:ornithine decarboxylase antizyme