[Identification and isolation of casein kinase type II from RNA-binding proteins of amphibian oocytes].
Protein kinase previously detected in RNA-binding proteins of amphibian oocytes phosphorylates casein far more efficiently than histones to form phosphoserine and phosphothreonine and utilizes both ATP and GTP. Heparin in concentrations below 1 microgram/ml inhibits protein kinase. This allows to relate the enzyme to casein kinases II. Protein kinase was extensively purified (more than 15000-fold) with respect to proteins of ribosome-free extract. The homogeneous enzyme consists of three polypeptide chains (Mr 43,000, 41,000, and 29,000). The 125I-labelled enzyme possessing casein kinase and RNA-binding activities when injected into amphibian oocytes was detected in the particles identical to free cytoplasmic informosomes in terms of their sedimentation properties.
D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D002352:Carrier Proteins / Q000378:metabolism*; D047388:Casein Kinases; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D006160:Guanosine Triphosphate / Q000378:metabolism; D006493:Heparin / Q000494:pharmacology; D009865:Oocytes / Q000201:enzymology*; D010766:Phosphorylation; D010768:Phosphoserine / Q000378:metabolism; D010769:Phosphothreonine / Q000378:metabolism; D047428:Protein Kinase Inhibitors; D011494:Protein Kinases / Q000302:isolation & purification* / Q000378:metabolism; D016601:RNA-Binding Proteins; D011896:Rana temporaria
D002352:Carrier Proteins; D047428:Protein Kinase Inhibitors; D016601:RNA-Binding Proteins; D010769:Phosphothreonine; D010768:Phosphoserine; D006160:Guanosine Triphosphate; D000255:Adenosine Triphosphate; D006493:Heparin; D011494:Protein Kinases; D047388:Casein Kinases
Identifikatsiia i vydelenie kazeinovoĭ kinazy tipa II iz RNK-sviazyvaiushchikh belkov ootsitov liagushki.