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Serine/threonine-protein kinase involved in regulation of lymphocyte migration. Phosphorylates MSN, and possibly PLK1. Involved in regulation of lymphocyte migration by mediating phosphorylation of ERM proteins such as MSN. Acts as a negative regulator of MAP3K1/MEKK1. May also act as a cell cycle regulator by acting as a polo kinase kinase: mediates phosphorylation of PLK1 in vitro; however such data require additional evidences in vivo.
Gene References into Functions
Binding of phosphatidylinositol 4,5-biphosphate to ezrin induces a conformational change permitting the insertion of the LOK C-terminal domain to wedge apart the membrane and F-actin-binding domains of ezrin. The N-terminal LOK kinase domain can then access a site 40 residues distal from the consensus sequence that collectively direct phosphorylation of the appropriate threonine residue. PMID: 28430576
The gene signature of OPA1, CTSA, NDUFA1, STK10 and PRDX1 was able to identify patients post-implant with a sensitivity of 91% and a specificity of 86% in discrimination between post-implant group and healthy controls. PMID: 27177495
STK10 functions as a tumor suppressor gene, and dysfunction of STK10 activity either through polymorphism or somatic mutations may confer anti-apoptotic effects contributing to carcinogenesis. PMID: 23842845
It was shown that lymphocyte-oriented and STE20 kinase were sufficient to restrict ezrin function to the apical domain. Both kinases were enriched in microvilli and locally activated there. PMID: 23209304
genetic polymorphism is associated with aspirin-intolerant asthma in a Korean population PMID: 21905501
Opposing roles of serine/threonine kinases MEKK1 and LOK in regulating the CD28 responsive element in T-cells PMID: 11903060
Stk10 is a novel polo-like kinase kinase that cooperates with hSlk to regulate Plk1 function in human cells PMID: 12639966
These studies identify a new ERM kinase of importance in lymphocytes and confirm the role of ezrin-radixin-moesin phosphorylation in regulating cell shape and motility. PMID: 19255442
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Involvement in disease
Testicular germ cell tumor (TGCT)
Subcellular Location
Cell membrane; Peripheral membrane protein.
Protein Families
Protein kinase superfamily, STE Ser/Thr protein kinase family, STE20 subfamily
Tissue Specificity
Highly expressed in rapidly proliferating tissues (spleen, placenta, and peripheral blood leukocytes). Also expressed in brain, heart, skeletal muscle, colon, thymus, kidney, liver, small intestine and lung.