MKP4 Antibody – Mouse Monoclonal

The protein encoded by this gene is a member of the dual specificity protein phosphatase subfamily. These phosphatases inactivate their target kinases by dephosphorylating both the phosphoserine/threonine and phosphotyrosine residues. They negatively regulate members of the mitogen-activated protein (MAP) kinase superfamily (MAPK/ERK, SAPK/JNK, p38), which is associated with cellular proliferation and differentiation. Different members of the family of dual specificity phosphatases show distinct substrate specificities for various MAP kinases, different tissue distribution and subcellular localization, and different modes of inducibility of their expression by extracellular stimuli. This gene product shows selectivity for members of the ERK family of MAP kinases, is expressed only in placenta, kidney, and fetal liver, and is localized to the cytoplasm and nucleus. [provided by RefSeq, Jul 2008]

DUSP9: a member of the dual specificity protein phosphatase subfamily. These phosphatases inactivate their target kinases by dephosphorylating both the phosphoserine/threonine and phosphotyrosine residues. They negatively regulate members of the mitogen-activated protein (MAP) kinase superfamily (ERK, JNK, p38). Shows selectivity for members of the ERK family, is expressed at high levels in placenta, kidney, and fetal liver, and is localized to the cytoplasm and nucleus.

Protein type: Motility/polarity/chemotaxis; Protein phosphatase, dual-specificity; EC 3.1.3.48; EC 3.1.3.16

Chromosomal Location of Human Ortholog: Xq28

Cellular Component: cytoplasm; nucleus

Molecular Function: protein binding; protein tyrosine/serine/threonine phosphatase activity; protein tyrosine phosphatase activity; MAP kinase tyrosine/serine/threonine phosphatase activity; phosphoprotein phosphatase activity

Biological Process: JNK cascade; protein amino acid dephosphorylation; inactivation of MAPK activity