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Linker-Dependent Folding Rationalizes PROTAC Cell Permeability
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DOI：10.1021/acs.jmedchem.2c00877.png)
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Proteolysis-targeting chimeras (PROTACs) must be cell permeable to reach their target proteins. This is challenging as the bivalent structure of PROTACs puts them in chemical space at, or beyond, the outer limits of oral druggable space. We used NMR spectroscopy and molecular dynamics (MD) simulations independently to gain insights into the origin of the differences in cell permeability displayed by three flexible cereblon PROTACs having closely related structures. Both methods revealed that the propensity of the PROTACs to adopt folded conformations with a low solvent-accessible 3D polar surface area in an apolar environment is correlated to high cell permeability. The chemical nature and the flexibility of the linker were essential for the PROTACs to populate folded conformations stabilized by intramolecular hydrogen bonds, pi-pi interactions, and van der Waals interactions. We conclude that MD simulations may be used for the prospective ranking of cell permeability in the design of cereblon PROTACs.
Keyword:
MOLECULAR-DYNAMICS
DRUG DISCOVERY
CONFORMATIONS
SOFTWARE
SPACE
PROGRESS
PACKAGE
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6.8
论文数:
2.7W
被引数:
9.4W
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