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Pharmaceuticals 2017, 10(1), 27; doi:10.3390/ph10010027

Protein Kinase CK2: Intricate Relationships within Regulatory Cellular Networks

1
Department of Biochemistry, Schulich School of Medicine & Dentistry, University of Western Ontario, London, ON N6A 5C1, Canada
2
Department of Oncology, Schulich School of Medicine & Dentistry, University of Western Ontario, London, ON N6A 5C1, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Joachim Jose
Received: 14 January 2017 / Revised: 25 February 2017 / Accepted: 2 March 2017 / Published: 5 March 2017
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Abstract

Protein kinase CK2 is a small family of protein kinases that has been implicated in an expanding array of biological processes. While it is widely accepted that CK2 is a regulatory participant in a multitude of fundamental cellular processes, CK2 is often considered to be a constitutively active enzyme which raises questions about how it can be a regulatory participant in intricately controlled cellular processes. To resolve this apparent paradox, we have performed a systematic analysis of the published literature using text mining as well as mining of proteomic databases together with computational assembly of networks that involve CK2. These analyses reinforce the notion that CK2 is involved in a broad variety of biological processes and also reveal an extensive interplay between CK2 phosphorylation and other post-translational modifications. The interplay between CK2 and other post-translational modifications suggests that CK2 does have intricate roles in orchestrating cellular events. In this respect, phosphorylation of specific substrates by CK2 could be regulated by other post-translational modifications and CK2 could also have roles in modulating other post-translational modifications. Collectively, these observations suggest that the actions of CK2 are precisely coordinated with other constituents of regulatory cellular networks. View Full-Text
Keywords: protein kinase CK2; post-translational modification; regulatory networks; protein–protein interaction networks; hierarchical phosphorylation; post-translational modification interplay protein kinase CK2; post-translational modification; regulatory networks; protein–protein interaction networks; hierarchical phosphorylation; post-translational modification interplay
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Nuñez de Villavicencio-Diaz, T.; Rabalski, A.J.; Litchfield, D.W. Protein Kinase CK2: Intricate Relationships within Regulatory Cellular Networks. Pharmaceuticals 2017, 10, 27.

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