Targeting the Genome-Stability Hub Ctf4 by Stapled-Peptide Design.Wu, Y., Villa, F., Maman, J., Lau, Y.H., Dobnikar, L., Simon, A.C., Labib, K., Spring, D.R., Pellegrini, L.
(2017) Angew Chem Int Ed Engl 56: 12866-12872
- PubMed: 28815832
- DOI: 10.1002/anie.201705611
- Primary Citation of Related Structures:
- PubMed Abstract:
- A Ctf4 trimer couples the CMG helicase to DNA polymerase alpha in the eukaryotic replisome.
Simon, A.C., Zhou, J.C., Perera, R.L., van Deursen, F., Evrin, C., Ivanova, M.E., Kilkenny, M.L., Renault, L., Kjaer, S., Matak-Vinkovic, D., Labib, K., Costa, A., Pellegrini, L.
(2014) Nature 510: 293
The exploitation of synthetic lethality by small-molecule targeting of pathways that maintain genomic stability is an attractive chemotherapeutic approach. The Ctf4/AND-1 protein hub, which links DNA replication, repair, and chromosome segregation, repre ...
The exploitation of synthetic lethality by small-molecule targeting of pathways that maintain genomic stability is an attractive chemotherapeutic approach. The Ctf4/AND-1 protein hub, which links DNA replication, repair, and chromosome segregation, represents a novel target for the synthetic lethality approach. Herein, we report the design, optimization, and validation of double-click stapled peptides encoding the Ctf4-interacting peptide (CIP) of the replicative helicase subunit Sld5. By screening stapling positions in the Sld5 CIP, we identified an unorthodox i,i+6 stapled peptide with improved, submicromolar binding to Ctf4. The mode of interaction with Ctf4 was confirmed by a crystal structure of the stapled Sld5 peptide bound to Ctf4. The stapled Sld5 peptide was able to displace the Ctf4 partner DNA polymerase α from the replisome in yeast extracts. Our study provides proof-of-principle evidence for the development of small-molecule inhibitors of the human CTF4 orthologue AND-1.
Department of Biochemistry, University of Cambridge, Cambridge, CB2 1GA, UK.