InnateDB: Systems Biology of the Innate Immune Response

Homo sapiens Protein: CSNK2A1

Summary

InnateDB Protein

IDBP-228736.6

Last Modified

2014-10-13 [Report errors or provide feedback]

Gene Symbol

CSNK2A1

Protein Name

casein kinase 2, alpha 1 polypeptide

Synonyms

CK2A1; CKII; CSNK2A3;

Species

Homo sapiens

Ensembl Protein

ENSP00000383076

InnateDB Gene

IDBG-37787 (CSNK2A1)

Protein Structure

UniProt Annotation

Function

Catalytic subunit of a constitutively active serine/threonine-protein kinase complex that phosphorylates a large number of substrates containing acidic residues C-terminal to the phosphorylated serine or threonine. Regulates numerous cellular processes, such as cell cycle progression, apoptosis and transcription, as well as viral infection. May act as a regulatory node which integrates and coordinates numerous signals leading to an appropriate cellular response. During mitosis, functions as a component of the p53/TP53-dependent spindle assembly checkpoint (SAC) that maintains cyclin-B-CDK1 activity and G2 arrest in response to spindle damage. Also required for p53/TP53-mediated apoptosis, phosphorylating 'Ser-392' of p53/TP53 following UV irradiation. Can also negatively regulate apoptosis. Phosphorylates the caspases CASP9 and CASP2 and the apoptotic regulator NOL3. Phosphorylation protects CASP9 from cleavage and activation by CASP8, and inhibits the dimerization of CASP2 and activation of CASP8. Regulates transcription by direct phosphorylation of RNA polymerases I, II, III and IV. Also phosphorylates and regulates numerous transcription factors including NF-kappa-B, STAT1, CREB1, IRF1, IRF2, ATF1, SRF, MAX, JUN, FOS, MYC and MYB. Phosphorylates Hsp90 and its co-chaperones FKBP4 and CDC37, which is essential for chaperone function. Regulates Wnt signaling by phosphorylating CTNNB1 and the transcription factor LEF1. Acts as an ectokinase that phosphorylates several extracellular proteins. During viral infection, phosphorylates various proteins involved in the viral life cycles of EBV, HSV, HBV, HCV, HIV, CMV and HPV. Phosphorylates PML at 'Ser-565' and primes it for ubiquitin- mediated degradation. Plays an important role in the circadian clock function by phosphorylating ARNTL/BMAL1 at 'Ser-90' which is pivotal for its interaction with CLOCK and which controls CLOCK nuclear entry. {ECO:0000269PubMed:11239457, ECO:0000269PubMed:11704824, ECO:0000269PubMed:16193064, ECO:0000269PubMed:19188443, ECO:0000269PubMed:20625391, ECO:0000269PubMed:22406621}.

Subcellular Localization

Disease Associations

Tissue Specificity

Comments

Interactions

Number of Interactions

This gene and/or its encoded proteins are associated with 440 experimentally validated interaction(s) in this database.
They are also associated with 14 interaction(s) predicted by orthology.

Experimentally validated
Total	440 [view]
Protein-Protein	433 [view]
Protein-DNA	4 [view]
Protein-RNA	0
DNA-DNA	3 [view]
RNA-RNA	0
DNA-RNA	0

Predicted by orthology
Total	14 [view]

Gene Ontology

Molecular Function

Accession	GO Term
GO:0004672	protein kinase activity
GO:0004674	protein serine/threonine kinase activity
GO:0005515	protein binding
GO:0005524	ATP binding
GO:0016772	transferase activity, transferring phosphorus-containing groups
GO:0047485	protein N-terminus binding
GO:0051879	Hsp90 protein binding

Biological Process

GO:0000278	mitotic cell cycle
GO:0006351	transcription, DNA-templated
GO:0006355	regulation of transcription, DNA-templated
GO:0006468	protein phosphorylation
GO:0007165	signal transduction
GO:0007411	axon guidance
GO:0008284	positive regulation of cell proliferation
GO:0016055	Wnt signaling pathway
GO:0030177	positive regulation of Wnt signaling pathway
GO:0030307	positive regulation of cell growth
GO:0043154	negative regulation of cysteine-type endopeptidase activity involved in apoptotic process
GO:0045732	positive regulation of protein catabolic process
GO:0048511	rhythmic process
GO:0061077	chaperone-mediated protein folding
GO:0071174	mitotic spindle checkpoint

Cellular Component

GO:0005634	nucleus
GO:0005829	cytosol
GO:0005886	plasma membrane
GO:0016580	Sin3 complex
GO:0016581	NuRD complex
GO:0031519	PcG protein complex

Protein Structure and Domains

PDB ID

InterPro

IPR000719 Protein kinase domain
IPR001245 Serine-threonine/tyrosine-protein kinase catalytic domain
IPR002290 Serine/threonine/dual specificity protein kinase, catalytic domain
IPR002575 Aminoglycoside phosphotransferase
IPR011009 Protein kinase-like domain

PFAM

PF00069
PF07714
PF01636

PRINTS

PR00109

PIRSF

SMART

SM00220

TIGRFAMs

Post-translational Modifications

Modification

Cross-References

SwissProt