7Q9U
Crystal structure of the high affinity KRas mutant PDE6D complex
This is a non-PDB format compatible entry.
Summary for 7Q9U
| Entry DOI | 10.2210/pdb7q9u/pdb |
| Descriptor | GTPase KRas, Retinal rod rhodopsin-sensitive cGMP 3',5'-cyclic phosphodiesterase subunit delta, GUANOSINE-5'-DIPHOSPHATE, ... (7 entities in total) |
| Functional Keywords | cancer, drug discovery, complex, signaling protein |
| Biological source | Homo sapiens (human) More |
| Total number of polymer chains | 4 |
| Total formula weight | 78923.69 |
| Authors | Yelland, T.,Ismail, I. (deposition date: 2021-11-14, release date: 2022-01-26, Last modification date: 2024-01-31) |
| Primary citation | Yelland, T.,Garcia, E.,Parry, C.,Kowalczyk, D.,Wojnowska, M.,Gohlke, A.,Zalar, M.,Cameron, K.,Goodwin, G.,Yu, Q.,Zhu, P.C.,ElMaghloob, Y.,Pugliese, A.,Archibald, L.,Jamieson, A.,Chen, Y.X.,McArthur, D.,Bower, J.,Ismail, S. Stabilization of the RAS:PDE6D Complex Is a Novel Strategy to Inhibit RAS Signaling. J.Med.Chem., 65:1898-1914, 2022 Cited by PubMed Abstract: RAS is a major anticancer drug target which requires membrane localization to activate downstream signal transduction. The direct inhibition of RAS has proven to be challenging. Here, we present a novel strategy for targeting RAS by stabilizing its interaction with the prenyl-binding protein PDE6D and disrupting its localization. Using rationally designed RAS point mutations, we were able to stabilize the RAS:PDE6D complex by increasing the affinity of RAS for PDE6D, which resulted in the redirection of RAS to the cytoplasm and the primary cilium and inhibition of oncogenic RAS/ERK signaling. We developed an SPR fragment screening and identified fragments that bind at the KRAS:PDE6D interface, as shown through cocrystal structures. Finally, we show that the stoichiometric ratios of KRAS:PDE6D vary in different cell lines, suggesting that the impact of this strategy might be cell-type-dependent. This study forms the foundation from which a potential anticancer small-molecule RAS:PDE6D complex stabilizer could be developed. PubMed: 35104933DOI: 10.1021/acs.jmedchem.1c01265 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.238 Å) |
Structure validation
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