Dual specificity phosphatase 22 (DUSP22)

Dual specificity phosphatase 22 (DUSP22) is an enzyme belonging to the dual specificity phosphatase family, capable of dephosphorylating both tyrosine and serine/threonine residues on substrate proteins. DUSP22 plays a regulatory role in multiple cell signaling pathways, most notably inhibiting the mitogen-activated protein kinase (MAPK) signaling cascades including ERK, JNK, and p38 pathways. DUSP22 is implicated in the negative regulation of T-cell receptor and B-cell receptor signaling, immune responses, and modulation of cell transcription and adhesion. It acts in both cytoplasmic and nuclear compartments, influencing degradation of proteins such as the E3 ubiquitin ligase UBR2 and inactivating kinases like LCK. DUSP22 is associated with a variety of diseases, particularly cancers (hematologic and leukemia), immune system disorders, and kidney diseases. Despite its therapeutic relevance as a regulatory phosphatase, no specific drugs are in clinical use that target DUSP22 directly.

Other names

MKPXJSP1JKAPVHXLow molecular weight dual specificity phosphatase 2Mitogen-activated protein kinase phosphatase XDual specificity protein phosphatase 22JNK pathway associated phosphataseJNK-stimulatory phosphatase-1

Inhibition of MAP kinase pathways (ERK, JNK, p38) via dephosphorylation; Inhibition of T-cell receptor and B-cell receptor signaling; Promotion of degradation of E3 ubiquitin ligase UBR2; Inactivation of tyrosine kinase LCK