6VJ8

Crystal structure of GlpG in complex with peptide chloromethylketone inhibitor

6VJ8 の概要

• エントリーDOI: 10.2210/pdb6vj8/pdb
• 関連するBIRD辞書のPRD_ID: PRD_002372
• 分子名称: Rhomboid family intramembrane serine protease GlpG, Peptide chloromethylketone inhibitor (3 entities in total)
• 機能のキーワード: inhibitor, complex, glpg, rhomboid protease, hydrolase-hydrolase inhibitor complex, hydrolase/hydrolase inhibitor
• 由来する生物種: Escherichia coli; 詳細
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 22464.18

構造登録者

Urban, S.,Cho, S. (登録日: 2020-01-15, 公開日: 2020-09-16, 最終更新日: 2023-11-15)

主引用文献

Gandhi, S.,Baker, R.P.,Cho, S.,Stanchev, S.,Strisovsky, K.,Urban, S.
Designed Parasite-Selective Rhomboid Inhibitors Block Invasion and Clear Blood-Stage Malaria.
Cell Chem Biol, 27:1410-1424.e6, 2020

PubMed Abstract: Rhomboid intramembrane proteases regulate pathophysiological processes, but their targeting in a disease context has never been achieved. We decoded the atypical substrate specificity of malaria rhomboid PfROM4, but found, unexpectedly, that it results from "steric exclusion": PfROM4 and canonical rhomboid proteases cannot cleave each other's substrates due to reciprocal juxtamembrane steric clashes. Instead, we engineered an optimal sequence that enhanced proteolysis >10-fold, and solved high-resolution structures to discover that boronates enhance inhibition >100-fold. A peptide boronate modeled on our "super-substrate" carrying one "steric-excluding" residue inhibited PfROM4 but not human rhomboid proteolysis. We further screened a library to discover an orthogonal alpha-ketoamide that potently inhibited PfROM4 but not human rhomboid proteolysis. Despite the membrane-immersed target and rapid invasion, ultrastructural analysis revealed that single-dosing blood-stage malaria cultures blocked host-cell invasion and cleared parasitemia. These observations establish a strategy for designing parasite-selective rhomboid inhibitors and expose a druggable dependence on rhomboid proteolysis in non-motile parasites.

PubMed: 32888502
DOI: 10.1016/j.chembiol.2020.08.011

実験手法

X-RAY DIFFRACTION (2.3 Å)