2MYM
Cullin3 - BTB interface: a novel target for stapled peptides
Summary for 2MYM
| Entry DOI | 10.2210/pdb2mym/pdb |
| Related | 2MYL |
| NMR Information | BMRB: 25457 |
| Descriptor | Cullin-3 (1 entity in total) |
| Functional Keywords | protein, protein binding |
| Biological source | Human (Homo sapiens) |
| Cellular location | Nucleus: Q13618 |
| Total number of polymer chains | 1 |
| Total formula weight | 2445.81 |
| Authors | Russo, L.,Palmieri, M.,Malgieri, G. (deposition date: 2015-01-27, release date: 2015-04-22, Last modification date: 2024-10-30) |
| Primary citation | de Paola, I.,Pirone, L.,Palmieri, M.,Balasco, N.,Esposito, L.,Russo, L.,Mazza, D.,Di Marcotullio, L.,Di Gaetano, S.,Malgieri, G.,Vitagliano, L.,Pedone, E.,Zaccaro, L. Cullin3 - BTB Interface: A Novel Target for Stapled Peptides. Plos One, 10:e0121149-e0121149, 2015 Cited by PubMed Abstract: Cullin3 (Cul3), a key factor of protein ubiquitination, is able to interact with dozens of different proteins containing a BTB (Bric-a-brac, Tramtrack and Broad Complex) domain. We here targeted the Cul3-BTB interface by using the intriguing approach of stabilizing the α-helical conformation of Cul3-based peptides through the "stapling" with a hydrocarbon cross-linker. In particular, by combining theoretical and experimental techniques, we designed and characterized stapled Cul3-based peptides embedding the helix 2 of the protein (residues 49-68). Intriguingly, CD and NMR experiments demonstrate that these stapled peptides were able to adopt the helical structure that the fragment assumes in the parent protein. We also show that some of these peptides were able to bind to the BTB of the tetrameric KCTD11, a substrate adaptor involved in HDAC1 degradation, with high affinity (~ 300-600 nM). Cul3-derived staple peptides are also able to bind the BTB of the pentameric KCTD5. Interestingly, the affinity of these peptides is of the same order of magnitude of that reported for the interaction of full-length Cul3 with some BTB containing proteins. Moreover, present data indicate that stapling endows these peptides with an increased serum stability. Altogether, these findings indicate that the designed stapled peptides can efficiently mimic protein-protein interactions and are potentially able to modulate fundamental biological processes involving Cul3. PubMed: 25848797DOI: 10.1371/journal.pone.0121149 PDB entries with the same primary citation |
| Experimental method | SOLUTION NMR |
Structure validation
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