CSNK2B

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Casein kinase II regulatory subunit
File:PDB 1rqf EBI.jpg
structure of ck2 beta subunit crystallized in the presence of a p21waf1 peptide
Identifiers
SymbolCK_II_beta
PfamPF01214
InterProIPR000704
PROSITEPDOC00845
SCOP21qf8 / SCOPe / SUPFAM
Available protein structures:
Pfam  structures / ECOD  
PDBRCSB PDB; PDBe; PDBj
PDBsumstructure summary

Casein kinase II subunit beta is a protein that in humans is encoded by the CSNK2B gene.[1][2] It is a ubiquitous protein kinase which regulates metabolic pathways, signal transduction, transcription, translation, and replication. The enzyme localizes to the endoplasmic reticulum and the Golgi apparatus.[3]

Casein kinase, a ubiquitous, well-conserved protein kinase involved in cell metabolism and differentiation, is characterised by its preference for Serine or Threonine in acidic stretches of amino acids. The enzyme is a tetramer of 2 alpha- and 2 beta-subunits.[4][5] However, some species (e.g., mammals) possess 2 related forms of the alpha-subunit (alpha and alpha'), while others (e.g., fungi) possess 2 related beta-subunits (beta and beta').[6] The alpha-subunit is the catalytic unit and contains regions characteristic of serine/threonine protein kinases. The beta-subunit is believed to be regulatory, possessing an N-terminal auto-phosphorylation site, an internal acidic domain, and a potential metal-binding motif.[6] The beta subunit is a highly conserved protein of about 25kDa that contains, in its central section, a cysteine-rich motif, CX(n)C, that could be involved in binding a metal such as zinc.[7] The mammalian beta-subunit gene promoter shares common features with those of other mammalian protein kinases and is closely related to the promoter of the regulatory subunit of cAMP-dependent protein kinase.[6]

Interactions

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CSNK2B has been shown to interact with CD163,[8] CSNK2A2,[9][10][11][12] Casein kinase 2, alpha 1,[10][11][12][13][14] FGF1,[15] TRIB3,[16] CDC34,[17] Ribosomal protein L5,[9][13][18][19] BTF3,[20] BRCA1,[21] RNF7,[13] P70-S6 Kinase 1[22] and APC.[23]

References

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  • Human CSNK2B genome location and CSNK2B gene details page in the UCSC Genome Browser.
  • PDBe-KB provides an overview of all the structure information available in the PDB for Human Casein kinase II subunit beta (CSNK2B)

Further reading

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  • Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  • Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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This article incorporates text from the public domain Pfam and InterPro: IPR000704
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