title: Characterisation of poly(ADP-Rib) polymerase activity in nuclei from the slime mould Dictyostelium discoideum.
abstract: Nuclei isolated from D. discoideum and incubated in vitro with 3H-NAD synthesise poly(ADP-Rib). The optimum incubation conditions for the poly(ADP-Rib) polymerase were determined. The Km of the enzyme is 18 microM NAD and it is inhibited by nicotinamide. Most of the poly(ADP-Rib) synthesised is attached to nuclear proteins.
mesh_terms: D002467:Cell Nucleus / Q000201:enzymology*; D004023:Dictyostelium / Q000201:enzymology*; D007700:Kinetics; D008274:Magnesium / Q000494:pharmacology; D009243:NAD / Q000378:metabolism; D009244:NAD+ Nucleosidase / Q000378:metabolism*; D009536:Niacinamide / Q000494:pharmacology; D009698:Nucleoproteins / Q000378:metabolism; D000067856:Poly(ADP-ribose) Polymerase Inhibitors; D011065:Poly(ADP-ribose) Polymerases / Q000378:metabolism*
chemical_list: D009698:Nucleoproteins; D000067856:Poly(ADP-ribose) Polymerase Inhibitors; D009243:NAD; D009536:Niacinamide; D011065:Poly(ADP-ribose) Polymerases; D009244:NAD+ Nucleosidase; D008274:Magnesium