该基因编码的蛋白是双特异性蛋白磷酸酶亚家族的一员这些磷酸酶通过磷酸丝氨酸/苏氨酸和磷酸酪氨酸残基的去磷酸化使其靶激酶失活。它们负性调节丝裂原活化蛋白激酶超家族（mapk/erk，sapk/jnk，p38）的成员，这些成员与细胞增殖和分化有关。双特异性磷酸酶家族的不同成员对不同的MAP激酶、不同的组织分布和亚细胞定位以及细胞外刺激诱导其表达的不同方式具有不同的底物特异性。该基因产物使erk1、erk2和jnk失活，在多种组织中表达，并定位于细胞核。已观察到该基因的两个选择性剪接转录变体，编码不同的亚型此外，还报道了多个聚腺苷酸化位点。[由RefSeq提供，2008年7月]
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 are 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 inactivates ERK1, ERK2 and JNK, is expressed in a variety of tissues, and is localized in the nucleus. Two alternatively spliced transcript variants, encoding distinct isoforms, have been observed for this gene. In addition, multiple polyadenylation sites have been reported. [provided by RefSeq, Jul 2008]