Walton G M, Gill G N, Abrass I B, Garren L D
Proc Natl Acad Sci U S A. 1971 May;68(5):880-4. doi: 10.1073/pnas.68.5.880.
In the adrenal cortex, the adenosine 3':5'-cyclic monophosphate (cAMP)-receptor protein and the cAMP-dependent protein kinase are located in both the cytosol and endoplasmic reticulum. The cAMP-dependent protein kinase from the cytosol catalyzes the phosphorylation of ribosome-associated protein. Ribosomes washed in 0.5 M NH(4)Cl retain the substrate of the protein kinase reaction, but are dependent on the NH(4)Cl extract for in vitro protein synthesis. Dissociation of the 80S ribosomes by 0.88 M KCl, however, releases the ribosome-associated (protein) substrate of the phosphorylation reaction.
在肾上腺皮质中,腺苷3':5'-环磷酸(cAMP)受体蛋白和cAMP依赖性蛋白激酶位于细胞质和内质网中。来自细胞质的cAMP依赖性蛋白激酶催化核糖体相关蛋白的磷酸化。用0.5M NH(4)Cl洗涤的核糖体保留了蛋白激酶反应的底物,但体外蛋白质合成依赖于NH(4)Cl提取物。然而,用0.88M KCl使80S核糖体解离会释放磷酸化反应的核糖体相关(蛋白质)底物。