title: A cell-free mammalian protein-synthesizing system stimulated by RNA from avian myeloblastosis virus.
abstract: Carcinoma cells, oncornavirus-infected cells and fetal bovine tissue provide salt wash ribosomal factors capable of responding to avian myeloblastosis virus (AM virus)-RNA and stimulating the incorporation of amino acids into proteins as well as catalyzing the binding of N-acetylated (35S) methionyl-tRNA. The exogenously dependent amino acid incorporation system is stimulated by the high molecular weight species of AM virus-RNA only, particularly the fraction containing polyadenylate (poly(A)) residues; the system is also markedly inhibited by the low molecular weight AM virus-RNA species. Activity for the exogenous system displays very definite divalent/monovalent cation optima and requires the presence of mammalian transfer RNA.
mesh_terms: D000818:Animals; D001354:Avian Leukosis Virus / Q000378:metabolism*; D009189:Avian Myeloblastosis Virus / Q000378:metabolism*; D002417:Cattle; D002642:Chick Embryo; D005333:Fetus; D005347:Fibroblasts / Q000378:metabolism; D006367:HeLa Cells / Q000378:metabolism; D007700:Kinetics; D008099:Liver / Q000378:metabolism; D008715:Methionine / Q000378:metabolism; D009363:Neoplasm Proteins / Q000096:biosynthesis; D009928:Organ Specificity; D010448:Peptide Initiation Factors; D010944:Plants / Q000378:metabolism; D011132:Polyribosomes / Q000378:metabolism; D014176:Protein Biosynthesis; D012367:RNA, Viral / Q000378:metabolism*; D012270:Ribosomes / Q000378:metabolism; D013045:Species Specificity; D013997:Time Factors
chemical_list: D009363:Neoplasm Proteins; D010448:Peptide Initiation Factors; D012367:RNA, Viral; D008715:Methionine