catalytic activity:ATP + a protein = ADP + a phosphoprotein.,function:Can act on substrates such as myelin basic protein and histone 2A on serine and threonine residues.,PTM:Autophosphorylated.,similarity:Belongs to the protein kinase superfamily.,similarity:Belongs to the protein kinase superfamily. STE Ser/Thr protein kinase family. STE20 subfamily.,similarity:Contains 1 protein kinase domain.,tissue specificity:Expressed predominantly in lymphoid organs.,
Cell membrane ; Peripheral membrane protein .
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.