title: Comparison of the effects of polyamines on the activities of RNA polymerases from murine normal tissues and transplantable tumors.
abstract: Nuclear DNA-dependent RNA polymerases I, II and III were purified from kidney, liver and spleen from Swiss mice (Mus musculis) and from seven transplantable murine tumors. In the presence of the optimal concentration of (NH4)2SO4 for each polymerase, 1-8 mM spermidine or spermine stimulated most polymerases several fold, and generally, enzyme I was stimulated more than either enzyme II or III. Spermine was more efficacious than spermidine as a stimulant of polymerase activity except for polymerase III from three tumors. Tumor polymerases I (or II) and the corresponding normal tissue enzymes responded similarly to the polyamines. Stimulation of a RNA polymerase by a polyamine could not be correlated with the growth rate of the tissues of polymerase origin or with the tissue's RNA polymerase or RNA synthetic activities.
mesh_terms: D000818:Animals; D012321:DNA-Directed RNA Polymerases / Q000378:metabolism*; D007668:Kidney / Q000201:enzymology*; D007700:Kinetics; D008099:Liver / Q000201:enzymology*; D051379:Mice; D009374:Neoplasms, Experimental / Q000201:enzymology*; D012318:RNA Polymerase I / Q000378:metabolism*; D012319:RNA Polymerase II / Q000378:metabolism*; D012320:RNA Polymerase III / Q000378:metabolism*; D013095:Spermidine / Q000494:pharmacology*; D013096:Spermine / Q000494:pharmacology*; D013154:Spleen / Q000201:enzymology*
chemical_list: D013096:Spermine; D012319:RNA Polymerase II; D012321:DNA-Directed RNA Polymerases; D012318:RNA Polymerase I; D012320:RNA Polymerase III; D013095:Spermidine