8Q6G image
Entry Detail
PDB ID:
8Q6G
Keywords:
TRANSFERASE
Title:
HUMAN PI4KIIIB IN COMPLEX WITH COVALENTLY BOUND INHIBITOR (COMPOUND 8)
Biological Source:
Source Organism:
Homo sapiens
Host Organism:
Baculovirus expression vector pFastBac1-HM
PDB Version:
Deposition Date:
2023-08-11
Release Date:
2023-12-13
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.54 Å
R-Value Free:
0.22
R-Value Work:
0.16
R-Value Observed:
0.16
Space Group:
P 21 21 21
8Q6G validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Phosphatidylinositol 4-kinase beta
Mutations:R409Q,R412Q
Chain IDs:A
Chain Length:424
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9UBF8 Pfam ID:PF00454 EC:2.7.1.67
Ligand Molecules
EDO
KIH
MG
Primary Citation
Covalent targeting of non-cysteine residues in PI4KIII beta.
Rsc Chem Biol 4 1111 1122 (2023)
PMID: 38033723 DOI: 10.1039/d3cb00142c

Abstact

The synthesis and characterisation of fluorosulfate covalent inhibitors of the lipid kinase PI4KIIIβ is described. The conserved lysine residue located within the ATP binding site was targeted, and optimised compounds based upon reversible inhibitors with good activity and physicochemical profile showed strong reversible interactions and slow onset times for the covalent inhibition, resulting in an excellent selectivity profile for the lipid kinase target. X-Ray crystallography demonstrated a distal tyrosine residue could also be targeted using a fluorosulfate strategy. Combination of this knowledge showed that a dual covalent inhibitor could be developed which reveals potential in addressing the challenges associated with drug resistant mutations.

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Primary Citation of related structures
8Q6G