Aurora-B kinase (AurB) is a serine/threonine kinase which is the enzymatic core of the Chromosomal Passenger Complex (CPC). This complex functions in chromosome alignment and separation, histone modification, and cytokinesis. CPC also includes three non-enzymatic subunits known as the inner centromere protein (INCENP), survivin, and borealin, which determine the activity, localization, stability, and possibly even the substrate specificity of AurB. Two CPCs exist during mitosis: one containing all four members and another consisting of INCENP and AurB. Quaternary CPC functions during chromosome alignment and cytokinesis, whereas the INCENP-AurB complex may be responsible for modifying histone H3. AurB is overexpressed in a number of tumours, including primary breast and colon tumour samples. Its expression in tumours seems to be linked with Aurora-A kinase, suggesting a feedback mechanism between the two proteins.
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Protein Aliases: AIE2; AIK1; AIK3; AIM-1; AIRK3; ARK-2; ARK3; AURKC; Aurora 1; aurora B; Aurora kinase B; aurora kinase B-Sv1; aurora kinase B-Sv2; Aurora- and IPL1-like midbody-associated protein 1; aurora-1; aurora-B; aurora-related kinase 2; Aurora/IPL1-related kinase 2; EC 220.127.116.11; NP_004208; protein phosphatase 1, regulatory subunit 48; serine/threonine kinase 12; serine/threonine kinase 5; Serine/threonine-protein kinase 12; Serine/threonine-protein kinase 5; Serine/threonine-protein kinase aurora-B; STK-1; STK13
Gene Aliases: AIK2; AIM-1; AIM1; AIRK2; AL022959; ARK2; AurB; AURKB; aurkb-sv1; aurkb-sv2; IPL1; PPP1R48; STK-1; STK1; STK12; STK5
Molecular Function: non-receptor serine/threonine protein kinase