Crystal structure of human protein kinase CK2: insights into basic properties of the CK2 holoenzyme.
The crystal structure of a fully active form of human protein kinase CK2 (casein kinase 2) consisting of two C-terminally truncated catalytic and two regulatory subunits has been determined at 3.1 A resolution. In the CK2 complex the regulatory subunits form a stable dimer linking the two catalytic subunits, which ... make no direct contact with one another. Each catalytic subunit interacts with both regulatory chains, predominantly via an extended C-terminal tail of the regulatory subunit. The CK2 structure is consistent with its constitutive activity and with a flexible role of the regulatory subunit as a docking partner for various protein kinases. Furthermore it shows an inter-domain mobility in the catalytic subunit known to be functionally important in protein kinases and detected here for the first time directly within one crystal structure.
Mesh Terms:
Amino Acid Sequence, Casein Kinase II, Catalytic Domain, Crystallography, X-Ray, Holoenzymes, Humans, Models, Molecular, Molecular Sequence Data, Motion, Peptide Fragments, Protein Structure, Tertiary, Protein-Serine-Threonine Kinases, Recombinant Proteins, Static Electricity
Amino Acid Sequence, Casein Kinase II, Catalytic Domain, Crystallography, X-Ray, Holoenzymes, Humans, Models, Molecular, Molecular Sequence Data, Motion, Peptide Fragments, Protein Structure, Tertiary, Protein-Serine-Threonine Kinases, Recombinant Proteins, Static Electricity
EMBO J.
Date: Oct. 01, 2001
PubMed ID: 11574463
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