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UBA domain found in E3 ubiquitin-protein ligase Cbl and similar proteins Cbl, also called casitas B-lineage lymphoma proto-oncogene, proto-oncogene c-Cbl, RING finger protein 55, or signal transduction protein Cbl, is a multi-domain protein that acts as a key negative regulator of various receptor and non-receptor tyrosine kinases signaling. It contains a tyrosine kinase-binding domain (TKB), a proline-rich domain, a RING domain, and a ubiquitin-associated (UBA) domain. The TKB is responsible for the interactions with many tyrosine kinases, such as the colony-stimulating factor-1 (CSF-1) receptor, Syk/ZAP-70 and Src-family of protein tyrosine kinases. The proline-rich domain can recruit proteins with SH3 domain. Moreover, Cbl functions as an E3 ubiquitin ligase that can bind ubiquitin-conjugating enzymes (E2s) through RING domain.
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Jiyao W et al.(2023). "The conserved domain database in 2023.",