title: Reduction of mono(ADP-ribosyl)ation of histones in rat testis by gonadotropin-testosterone system.
abstract: Mono(ADP-ribose) synthetase activity in the nuclear fraction of immature rat testis was investigated in reference to the effect of testosterone. When the nuclear fraction was incubated with [32P] NAD in the presence of nicotinamide, an inhibitor of poly (ADP-ribose) synthetase, some proteins with a molecular mass of 14.4-21.5 kDa were ADP-ribosylated. In these proteins, H2B and H3 histones were found by sequencing 20 amino acids in the N-terminus. Their incorporations of ADP-ribose moiety were significantly decreased in immature rats at 4 hr after the subcutaneous injection of testosterone. Furthermore, the treatments with LH and FSH of the immature rats reduced mono(ADP-ribosyl)ations of H2B and H3 histones in a time-dependent manner. These results suggest that the testicular mono(ADP-ribose) synthetase activity is under the control of gonadotropin-testosterone system and is possibly related to differentiation of the testis.
mesh_terms: D036002:ADP Ribose Transferases; D000246:Adenosine Diphosphate Ribose / Q000378:metabolism*; D000595:Amino Acid Sequence; D000818:Animals; D002467:Cell Nucleus / Q000378:metabolism; D005640:Follicle Stimulating Hormone / Q000494:pharmacology*; D006657:Histones / Q000302:isolation & purification / Q000378:metabolism*; D007986:Luteinizing Hormone / Q000494:pharmacology*; D008297:Male; D008969:Molecular Sequence Data; D009243:NAD / Q000378:metabolism; D009687:Nuclear Proteins / Q000302:isolation & purification / Q000378:metabolism; D010446:Peptide Fragments / Q000737:chemistry / Q000302:isolation & purification; D011065:Poly(ADP-ribose) Polymerases / Q000378:metabolism*; D051381:Rats; D017208:Rats, Wistar; D013737:Testis / Q000187:drug effects / Q000378:metabolism*; D013739:Testosterone / Q000494:pharmacology*
chemical_list: D006657:Histones; D009687:Nuclear Proteins; D010446:Peptide Fragments; D009243:NAD; D000246:Adenosine Diphosphate Ribose; D013739:Testosterone; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D036002:ADP Ribose Transferases; D011065:Poly(ADP-ribose) Polymerases