TAOK2 - Serine/threonine-protein kinase TAO2 - human protein (Function)
 
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TAOK2 »  Serine/threonine-protein kinase TAO2
 
Protein also known as:  Thousand and one amino acid protein kinase 2.
Gene name:  TAOK2
One or more isoforms of this protein have been shown to exist at protein level
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1 24 4
GENE REF ISO

Function

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Overview 
Serine/threonine-protein kinase involved in different processes such as membrane blebbing and apoptotic bodies formation DNA damage response and MAPK14/p38 MAPK stress-activated MAPK cascade. Phosphorylates itself, MBP, activated MAPK8, MAP2K3, MAP2K6 and tubulins. Activates the MAPK14/p38 MAPK signaling pathway through the specific activation and phosphorylation of the upstream MAP2K3 and MAP2K6 kinases. In response to DNA damage, involved in the G2/M transition DNA damage checkpoint by activating the p38/MAPK14 stress-activated MAPK cascade, probably by mediating phosphorylation of upstream MAP2K3 and MAP2K6 kinases.  
8
  • CuratedUniProtKB
Isoform  Iso 2   But not isoform 1, is required for PCDH8 endocytosis. Following homophilic interactions between PCDH8 extracellular domains, isoform 2 phosphorylates and activates MAPK14/p38 MAPK which in turn phosphorylates isoform 2. This process leads to PCDH8 endocytosis and CDH2 cointernalization. Both isoforms are involved in MAPK14 phosphorylation.  
8
  • CuratedUniProtKB
Isoform  Iso 1   But not isoform 2, plays a role in apoptotic morphological changes, including cell contraction, membrane blebbing and apoptotic bodies formation. This function, which requires the activation of MAPK8/JNK and nuclear localization of C-terminally truncated isoform 1, may be linked to the mitochondrial CASP9-associated death pathway.  
8
  • CuratedUniProtKB
Isoform  Iso 1   Binds to microtubules and affects their organization and stability independently of its kinase activity. Prevents MAP3K7-mediated activation of CHUK, and thus NF-kappa-B activation, but not that of MAPK8/JNK. May play a role in the osmotic stress-MAPK8 pathway.  
8
  • CuratedUniProtKB
GO molecular function 
ATP bindingdefinition[GO:0005524]  
  • IEAUniProtKB KW
Mitogen-activated protein kinase kinase bindingdefinition[GO:0031434]  
1
  • IPIUniProtKB
Protein serine/threonine kinase activitydefinition[GO:0004674]  
2
  • IDAUniProtKB
GO biological process 
Actin cytoskeleton organizationdefinition[GO:0030036]  
1
  • IDAUniProtKB
Activation of MAPKK activitydefinition[GO:0000186]  
1
  • IDAUniProtKB
Apoptotic processdefinition[GO:0006915]  
1
  • NASUniProtKB
Cell migrationdefinition[GO:0016477]  
1
  • NASUniProtKB
Focal adhesion assemblydefinition[GO:0048041]  
1
  • IDAUniProtKB
G2/M transition DNA damage checkpointdefinition[GO:0031572]  
1
  • IMPUniProtKB
Positive regulation of JNK cascadedefinition[GO:0046330]  
1
  • IDAUniProtKB
Positive regulation of stress-activated MAPK cascadedefinition[GO:0032874]  
1
  • IMPUniProtKB
Protein targeting to membranedefinition[GO:0006612]  
1
  • NASUniProtKB
Regulation of cell growthdefinition[GO:0001558]  
1
  • NASUniProtKB
Regulation of cell shapedefinition[GO:0008360]  
1
  • IDAUniProtKB
Response to DNA damage stimulusdefinition[GO:0006974]  
1
  • IDAUniProtKB
Response to stressdefinition[GO:0006950]  
1
  • IDAUniProtKB
Stress-activated MAPK cascadedefinition[GO:0051403]  
1
  • IDAUniProtKB
Enzymatic activity 
This protein acts as an enzyme. It is known to catalyze the following reaction
EC 2.7.11.1: ATP + a protein ADP + a phosphoprotein.  
  • CuratedUniProtKB
It requires the following cofactor
Magnesium (By similarity).  
  • CuratedUniProtKB
It is regulated in the following manner
Selectively inhibited by the enantiopure organoruthenium inhibitor 9E1. Activated following arsenic trioxide (As(2)O(3)) treatment.  
2
  • CuratedUniProtKB
Pathways 
According to KEGG, this protein belongs to the following pathway:
MAPK signaling pathway  hsa04010+9344  
According to Pathway Interaction DB, this protein belongs to the following pathway:
p38 MAPK signaling pathway  p38_mkk3_6pathway  
 

Keywords

Molecular function 
Kinase  definition   [KW-0418]
Serine/threonine-protein kinase  definition   [KW-0723]
Transferase  definition   [KW-0808]
Technical term 
Reference proteome  definition   [KW-1185]