title: [Poly(ADP-ribosylation) of nuclear proteins in rat thymocytes].
abstract: Specific antibodies to poly(ADP-ribose) were obtained and characterized. Using these antibodies, the tissue specificity of poly(ADP-ribose) modified nuclear proteins from rat thymocytes and hepatocytes was studied. The differences in the levels of poly(ADP-ribosylation) of nuclear proteins from both tissues were found to be quantitative rather than qualitative. Analysis of intranuclear distribution of poly(ADP-ribose) acceptor proteins revealed that the bulk of them is localized in the nuclear sap and matrix. A comparison of spectral properties of poly(ADP-ribosylated) proteins, using specific antibodies and label incorporation from [14C]NAD showed the existence of two protein groups. Some of those were modified in a great degree but exchange poly(ADP-ribose) at a slow rate, whereas others (e.g., histones and HMG proteins) modified in a small degree exchanged poly(ADP-ribose) at a much higher rate. The results obtained by different methods are discussed.
mesh_terms: D000818:Animals; D002417:Cattle; D006609:High Mobility Group Proteins / Q000378:metabolism; D006657:Histones / Q000378:metabolism; D015151:Immunoblotting; D007124:Immunoenzyme Techniques; D008297:Male; D009687:Nuclear Proteins / Q000378:metabolism*; D009702:Nucleoside Diphosphate Sugars / Q000378:metabolism*; D011064:Poly Adenosine Diphosphate Ribose / Q000276:immunology / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains; D013950:Thymus Gland / Q000378:metabolism*
chemical_list: D006609:High Mobility Group Proteins; D006657:Histones; D009687:Nuclear Proteins; D009702:Nucleoside Diphosphate Sugars; D011064:Poly Adenosine Diphosphate Ribose
vernacular_title: Poli(ADP-ribozilirovanie) iadernykh belkov timotsitov krys.