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Zielinski R, et al.  (2006) Fip1--an essential component of the Saccharomyces cerevisiae polyadenylation machinery is phosophorylated by protein kinase CK2. Mol Cell Biochem 286(1-2):191-7

Abstract: Since Fip1 is phosphoprotein we investigated whether it is a substrate for protein kinase CK2. According to the amino acid sequence Fip1 harbours twenty putative CK2 phosphorylation sites. Here we have report characterization of Fip1 as a substrate for both forms of CK2. Fip1 serves as a substrate for both the recombinant CK2alpha ' (K ( m ) 1.28 muM) and holoenzyme (K ( m ) 1.4 muM) but not for CK1. By MALDI-MS we identified the two serine residues at positions 73 and 77 as the possible in vitro phosphorylation sites. These data may help to elucidate the role of Fip1 in the mRNA 3'-OH polyadenylation process and the involvement of CK2 mediated phosphorylation in regulation of interactions and activity members of cleavage/polyadenylation factor (CPF) complex.

Status: Published Type: Journal Article PubMed ID: 16496213

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Topics Genes linked to topics
CKA1 CKA2 CKB1 CKB2 FIP1
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Primary Literature blue ball blue ball blue ball blue ball blue ball
Protein Processing/Modification/Regulation blue ball
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Protein-protein Interactions blue ball blue ball blue ball blue ball blue ball
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