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E3 Ubiquitin Ligase CBL-B

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Synonyms

Casitas B Lymphoma

Historical Background

The E3 ubiquitin ligase CBL-B (Casitas Blymphoma-b) is a member of the highly conserved mammalian Cbl family consisting of c-Cbl, Cbl-b, and Cbl-3. c-Cbl is the founding member, which was first discovered in 1989 (Langdon et al. 1989), whereas Cbl-b was first cloned in 1995 (Keane et al. 1995). Both Cbl-b and c-Cbl contain an N-terminal protein tyrosine kinase binding (TKB) domain, a RING finger, a C-terminal proline-rich region (PRR) with potential tyrosine phosphorylation sites, and a ubiquitin-associated domain (UBA) (Fig. 1). With these multiple domains, c-Cbl and Cbl-b can act as adaptor proteins and forms multiple complexes with many signaling molecules to modulate intracellular signaling events.

E3 Ubiquitin Ligase CBL-B, Fig. 1
figure 61 figure 61

Cbl-b structure

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Correspondence to Jian Zhang .

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Tang, J., Zhang, J. (2018). E3 Ubiquitin Ligase CBL-B. In: Choi, S. (eds) Encyclopedia of Signaling Molecules. Springer, Cham. https://doi.org/10.1007/978-3-319-67199-4_101569

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