8GH7 image
Entry Detail
PDB ID:
8GH7
Title:
142D6 bound to BIR3-XIAP
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2023-03-09
Release Date:
2023-07-05
Method Details:
Experimental Method:
Resolution:
1.75 Å
R-Value Free:
0.20
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:E3 ubiquitin-protein ligase XIAP
Chain IDs:A, B
Chain Length:99
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:BIR3 inhibitor MAA-CHG-PRO-ZHW
Chain IDs:C (auth: D), D (auth: H)
Chain Length:4
Number of Molecules:2
Biological Source:synthetic construct
Peptide-like Molecules
PRD_002528
Primary Citation
Characterization of a Potent and Orally Bioavailable Lys-Covalent Inhibitor of Apoptosis Protein (IAP) Antagonist.
J.Med.Chem. 66 8159 8169 (2023)
PMID: 37262387 DOI: 10.1021/acs.jmedchem.3c00467

Abstact

We have recently reported on the use of aryl-fluorosulfates in designing water- and plasma-stable agents that covalently target Lys, Tyr, or His residues in the BIR3 domain of the inhibitor of the apoptosis protein (IAP) family. Here, we report further structural, cellular, and pharmacological characterizations of this agent, including the high-resolution structure of the complex between the Lys-covalent agent and its target, the BIR3 domain of X-linked IAP (XIAP). We also compared the cellular efficacy of the agent in two-dimensional (2D) and three-dimensional (3D) cell cultures, side by side with the clinical candidate reversible IAP inhibitor LCL161. Finally, in vivo pharmacokinetic studies indicated that the agent was long-lived and orally bioavailable. Collectively our data further corroborate that aryl-fluorosulfates, when incorporated correctly in a ligand, can result in Lys-covalent agents with pharmacodynamic and pharmacokinetic properties that warrant their use in the design of pharmacological probes or even therapeutics.

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