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Protein kinase CK2 phosphorylates and activates the SR protein-specific kinase 1
- Source :
-
Biochemical & Biophysical Research Communications . Feb2003, Vol. 301 Issue 3, p650. 7p. - Publication Year :
- 2003
-
Abstract
- The serine/arginine subfamily of protein kinases has been conserved throughout evolution and its members are thought to play important roles in the regulation of multiple cellular processes. Mammalian SRPK1 has been considered as a constitutively active kinase that is predominantly expressed in testis. In the present study, recombinant GST-SRPK1 was used as substrate to identify potential protein kinase(s) in testis extracts, involved in phosphorylating and thereby regulating the activity of this enzyme. Using a panel of chromatography media, inhibition by heparin, immunoblot analysis, and phosphopeptide mapping, CK2 was determined to be the major kinase that phosphorylates SRPK1. Phosphorylation of SRPK1 by CK2 occurred mainly at <f>Ser51</f> and <f>Ser555</f> in vitro, and resulted in approximately 6-fold activation of the enzyme. These findings suggest that SRPK1 may be an important cellular target for CK2 action. [Copyright &y& Elsevier]
- Subjects :
- *PROTEIN kinases
*SPERMATOGENESIS
Subjects
Details
- Language :
- English
- ISSN :
- 0006291X
- Volume :
- 301
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Biochemical & Biophysical Research Communications
- Publication Type :
- Academic Journal
- Accession number :
- 9011755
- Full Text :
- https://doi.org/10.1016/S0006-291X(02)03055-3