7FIC image
Deposition Date 2021-07-31
Release Date 2022-06-08
Last Version Date 2024-10-09
Entry Detail
PDB ID:
7FIC
Keywords:
Title:
Reversible lysine-targeted probes reveal residence time-based kinase selectivity in vivo
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Method Details:
Experimental Method:
Resolution:
2.32 Å
R-Value Free:
0.27
R-Value Work:
0.23
R-Value Observed:
0.23
Space Group:
P 32 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Aurora kinase A
Gene (Uniprot):AURKA
Mutations:C290A
Chain IDs:A
Chain Length:265
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Reversible lysine-targeted probes reveal residence time-based kinase selectivity.
Nat.Chem.Biol. 18 934 941 (2022)
PMID: 35590003 DOI: 10.1038/s41589-022-01019-1

Abstact

The expansion of the target landscape of covalent inhibitors requires the engagement of nucleophiles beyond cysteine. Although the conserved catalytic lysine in protein kinases is an attractive candidate for a covalent approach, selectivity remains an obvious challenge. Moreover, few covalent inhibitors have been shown to engage the kinase catalytic lysine in animals. We hypothesized that reversible, lysine-targeted inhibitors could provide sustained kinase engagement in vivo, with selectivity driven in part by differences in residence time. By strategically linking benzaldehydes to a promiscuous kinase binding scaffold, we developed chemoproteomic probes that reversibly and covalently engage >200 protein kinases in cells and mice. Probe-kinase residence time was dramatically enhanced by a hydroxyl group ortho to the aldehyde. Remarkably, only a few kinases, including Aurora A, showed sustained, quasi-irreversible occupancy in vivo, the structural basis for which was revealed by X-ray crystallography. We anticipate broad application of salicylaldehyde-based probes to proteins that lack a druggable cysteine.

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