Abstract:
:SAP155 is an essential component of the spliceosome and its phosphorylation is required for splicing catalysis, but little is known concerning its function and regulation during spermatogenesis in postnatal murine testes. We report that inhibition of dual-specificity tyrosine-phosphorylation regulated kinase (DYRK) IA strongly suppressed the mitogen-stimulated SAP155 phosphorylation and constitutive splicing of IκB pre-mRNA as well as the proliferation of spermatogonial and Sertoli cells in cultures of the 6-day post partum testes and a spermatogonial cell line, but not in a Sertoli cell line. Our findings suggest that the active spliceosome, containing SAP155 phosphorylated by DYRKIA, performs pre-mRNA splicing in spermatogonia during testicular development.
journal_name
Mol Cell Biochemjournal_title
Molecular and cellular biochemistryauthors
Eto K,Sonoda Y,Abe Sdoi
10.1007/s11010-011-0857-7subject
Has Abstractpub_date
2011-09-01 00:00:00pages
217-22issue
1-2eissn
0300-8177issn
1573-4919journal_volume
355pub_type
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