6r28

Structure of peptide P7, which binds Cdc42 and inhibits effector interactions.

spinqualitylabelsall models 6r28 Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6r28 is a 1 chain structure with sequence from Synthetic construct. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR Ligands: HCS Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Aberrant Ras signalling drives 30% of cancers and inhibition of Rho family small-GTPase signalling has been shown to combat Ras-driven cancers. Here we present the discovery of a 16mer cyclic peptide that binds to Cdc42 with nanomolar affinity. Affinity maturation of this sequence has produced a panel of derived candidates with increased affinity and modulated specificity for other closely related small-GTPases. The structure of the tightest binding peptide was solved by NMR and its binding site on Cdc42 determined. Addition of a cell penetrating sequence allowed the peptides to access the cell interior and engage with their target(s), modulating signalling pathways. In Ras-driven cancer cell models, the peptides have an inhibitory effect on proliferation and show suppression of both invasion and motility. As such they represent promising candidates for Rho-family small GTPase inhibitors and therapeutics targeting Ras-driven cancers. Our data adds to the growing literature demonstrating that peptides are establishing their place in the biologics arm of drug discovery. The discovery and maturation of peptide biologics targeting the small G protein Cdc42: a bioblockade for Ras-driven signalling.,Tetley GJN, Murphy NP, Bonetto S, Ivanova-Berndt G, Revell J, Mott HR, Cooley RN, Owen D J Biol Chem. 2020 Jan 20. pii: RA119.010077. doi: 10.1074/jbc.RA119.010077. PMID:31959628 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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