5MT7 image
Entry Detail
PDB ID:
5MT7
Keywords:
Title:
Structure of E.coli GlpG in complex with peptide derived inhibitor Ac-VRHA-cmk
Biological Source:
PDB Version:
Deposition Date:
2017-01-06
Release Date:
2017-11-15
Method Details:
Experimental Method:
Resolution:
2.05 Å
R-Value Free:
0.22
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
H 3 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Rhomboid protease GlpG
Chain IDs:A
Chain Length:181
Number of Molecules:1
Biological Source:Escherichia coli K-12
Polymer Type:polypeptide(L)
Description:ACE-VAL-ARG-HIS-ALA-0QE
Chain IDs:B
Chain Length:6
Number of Molecules:1
Biological Source:Providencia stuartii
Primary Citation
General and Modular Strategy for Designing Potent, Selective, and Pharmacologically Compliant Inhibitors of Rhomboid Proteases.
Cell Chem Biol 24 1523 1536.e4 (2017)
PMID: 29107700 DOI: 10.1016/j.chembiol.2017.09.007

Abstact

Rhomboid-family intramembrane proteases regulate important biological processes and have been associated with malaria, cancer, and Parkinson's disease. However, due to the lack of potent, selective, and pharmacologically compliant inhibitors, the wide therapeutic potential of rhomboids is currently untapped. Here, we bridge this gap by discovering that peptidyl α-ketoamides substituted at the ketoamide nitrogen by hydrophobic groups are potent rhomboid inhibitors active in the nanomolar range, surpassing the currently used rhomboid inhibitors by up to three orders of magnitude. Such peptidyl ketoamides show selectivity for rhomboids, leaving most human serine hydrolases unaffected. Crystal structures show that these compounds bind the active site of rhomboid covalently and in a substrate-like manner, and kinetic analysis reveals their reversible, slow-binding, non-competitive mechanism. Since ketoamides are clinically used pharmacophores, our findings uncover a straightforward modular way for the design of specific inhibitors of rhomboid proteases, which can be widely applicable in cell biology and drug discovery.

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