CSNK2B

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This gene encodes the beta subunit of casein kinase II, 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

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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Further reading

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This article incorporates text from the public domain Pfam and InterPro IPR000704

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