| Structural highlights
Function
WWP1_HUMAN E3 ubiquitin-protein ligase which accepts ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. Ubiquitinates ERBB4 isoforms JM-A CYT-1 and JM-B CYT-1, KLF2, KLF5 and TP63 and promotes their proteasomal degradation. Ubiquitinates RNF11 without targeting it for degradation. Ubiquitinates and promotes degradation of TGFBR1; the ubiquitination is enhanced by SMAD7. Ubiquitinates SMAD6 and SMAD7. Ubiquitinates and promotes degradation of SMAD2 in response to TGF-beta signaling, which requires interaction with TGIF.[1] [2] [3]
Publication Abstract from PubMed
Molecules that induce novel interactions between proteins hold great promise for the study of biological systems and the development of therapeutics, but their discovery has been limited by the complexities of rationally designing interactions between three components, and because known binders to each protein are typically required to inform initial designs. Here, we report a general and rapid method for discovering alpha-helically constrained (Helicon) polypeptides that cooperatively induce the interaction between two target proteins without relying on previously known binders or an intrinsic affinity between the proteins. We show that Helicons are capable of binding every major class of E3 ubiquitin ligases, which are of great biological and therapeutic interest but remain largely intractable to targeting by small molecules. We then describe a phage-based screening method for discovering "trimerizer" Helicons, and apply it to reprogram E3s to cooperatively bind an enzyme (PPIA), a transcription factor (TEAD4), and a transcriptional coactivator (beta-catenin).
Recognition and reprogramming of E3 ubiquitin ligase surfaces by alpha-helical peptides.,Tokareva OS, Li K, Travaline TL, Thomson TM, Swiecicki JM, Moussa M, Ramirez JD, Litchman S, Verdine GL, McGee JH Nat Commun. 2023 Nov 1;14(1):6992. doi: 10.1038/s41467-023-42395-z. PMID:37914719[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Seo SR, Lallemand F, Ferrand N, Pessah M, L'Hoste S, Camonis J, Atfi A. The novel E3 ubiquitin ligase Tiul1 associates with TGIF to target Smad2 for degradation. EMBO J. 2004 Oct 1;23(19):3780-92. Epub 2004 Sep 9. PMID:15359284 doi:http://dx.doi.org/10.1038/sj.emboj.7600398
- ↑ Komuro A, Imamura T, Saitoh M, Yoshida Y, Yamori T, Miyazono K, Miyazawa K. Negative regulation of transforming growth factor-beta (TGF-beta) signaling by WW domain-containing protein 1 (WWP1). Oncogene. 2004 Sep 9;23(41):6914-23. PMID:15221015 doi:http://dx.doi.org/10.1038/sj.onc.1207885
- ↑ Verdecia MA, Joazeiro CA, Wells NJ, Ferrer JL, Bowman ME, Hunter T, Noel JP. Conformational flexibility underlies ubiquitin ligation mediated by the WWP1 HECT domain E3 ligase. Mol Cell. 2003 Jan;11(1):249-59. PMID:12535537
- ↑ Tokareva OS, Li K, Travaline TL, Thomson TM, Swiecicki JM, Moussa M, Ramirez JD, Litchman S, Verdine GL, McGee JH. Recognition and reprogramming of E3 ubiquitin ligase surfaces by α-helical peptides. Nat Commun. 2023 Nov 1;14(1):6992. PMID:37914719 doi:10.1038/s41467-023-42395-z
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