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Reference: Kubinski K, et al. (2006) Yeast elf1 factor is phosphorylated and interacts with protein kinase CK2. J Biochem Mol Biol 39(3):311-8

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Abstract


One of the biggest group of proteins influenced by protein kinase CK2 is formed by factors engaged in gene expression. Here we have reported recently identified yeast transcription elongation factor Elf1 as a new substrate for both monomeric and tetrameric forms of CK2. Elf1 serves as a substrate for both the recombinant CK2alpha' (K(m) 0.38 microM) and holoenzyme (K(m) 0.13 microM). By MALDI-MS we identified the two serine residues at positions 95 and 117 as the most probable in vitro phosphorylation sites. Coimmunoprecypitation experiments show that Elf1 interacts with catalytic (alpha and alpha') as well as regulatory (beta and beta') subunits of CK2. These data may help to elucidate the role of protein kinase CK2 and Elf1 in the regulation of transcription elongation.

Reference Type
Journal Article
Authors
Kubinski K, Zielinski R, Hellman U, Mazur E, Szyszka R
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