Ubiquitin-associated and SH3 domain-containing protein A (UBASH3A)

UBASH3A encodes a signaling adaptor protein with ubiquitin-associated and SH3 domains that regulates cellular processes in the immune system, especially T-cell signaling. It negatively modulates receptor-mediated tyrosine kinase degradation, primarily acting via phosphatase-independent mechanisms, and is involved in controlling apoptosis and immune activation. The gene is mainly associated with immune regulation, and genetic variation or expression changes have been implicated in autoimmune diseases like type 1 diabetes and in certain cancers. UBASH3A functions largely by modulating receptor signaling, apoptosis pathways, and endocytic processes, and it can regulate various kinases and signaling molecules within lymphoid tissues. Key distinguishing facts: UBASH3A is not a conventional receptor, ion channel, or transporter, but instead a member of the atypical tyrosine phosphatase signaling adaptor family. It functions primarily in lymphoid tissues, affecting immune system development and regulation.

Other names

TULA-1T-cell ubiquitin ligand AUBS3AHGNC: 12462NCBI Gene: 53347UniProtKB: P57075

Drugs or molecules targeting UBASH3A would act via: Modulation of immune cell signaling (e.g., NF-κB pathway); Regulation of apoptosis in lymphocytes; Interference with receptor tyrosine kinase degradation.