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UBA domain found in salt-inducible kinase 2 (SIK2) SIK2, also called Qin-induced kinase or serine/threonine-protein kinase SNF1-like kinase 2 (SNF1LK2), is a serine/threonine kinase highly expressed in adipocytes. It belongs to the AMP-activated protein kinases (AMPK) family involved in the regulation of metabolism during energy stress. It plays an important role in the insulin-signaling pathway during adipocyte differentiation, as well as in autophagy progression. Moreover, SIK2 plays a critical role in neuronal survival and modulates cAMP responsive element binding protein (CREB)-mediated gene expression in response to hormones and nutrients. SIK2 acts as a critical determinant in autophagy progression. In addition, SIK2 localizes at the centrosome and functions as a centrosome kinase required for bipolar mitotic spindle formation. It is involved in the initiation of mitosis, and regulates the localization of the centrosome linker protein, C-Nap1, through S2392 phosphorylation. SIK2 contains an N-terminal protein kinase catalytic domain followed by an ubiquitin-associated (UBA) domain. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",