8B0S

SARS-COV-2 Main Protease adduct with Au(NHC)Cl

8B0S の概要

• エントリーDOI: 10.2210/pdb8b0s/pdb
• 関連するPDBエントリー: 7DAU 7NWX 7NXH
• 分子名称: 3C-like proteinase nsp5, GOLD ION (3 entities in total)
• 機能のキーワード: nsp5, mpro, sars_cov-2, viral protein
• 由来する生物種: Severe acute respiratory syndrome coronavirus 2
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 33489.93

構造登録者

Massai, L.,Grifagni, D.,Desantis, A.,Geri, A.,Calderone, V.,Cantini, F.,Messori, L.,Banci, L. (登録日: 2022-09-08, 公開日: 2022-12-28, 最終更新日: 2024-01-31)

主引用文献

Massai, L.,Grifagni, D.,De Santis, A.,Geri, A.,Cantini, F.,Calderone, V.,Banci, L.,Messori, L.
Gold-Based Metal Drugs as Inhibitors of Coronavirus Proteins: The Inhibition of SARS-CoV-2 Main Protease by Auranofin and Its Analogs.
Biomolecules, 12:-, 2022

PubMed Abstract: Gold compounds have a long tradition in medicine and offer many opportunities for new therapeutic applications. Herein, we evaluated the lead compound Auranofin and five related gold(I) complexes as possible inhibitors of SARS-CoV-2 Main Protease (SARS-CoV-2 M), a validated drug target for the COVID-19 disease. The investigational panel of gold compounds included Auranofin; three halido analogues, i.e., Au(PEt)Cl, Au(PEt)Br, and Au(PEt)I; and two gold carbene complexes, i.e., Au(NHC)Cl and [Au(NHC)]PF. Notably, all these gold compounds, with the only exception of [Au(NHC)]PF, turned out to be potent inhibitors of the catalytic activity of SARS-CoV-2 M: the measured K values were in the range 2.1-0.4 μM. The reactions of the various gold compounds with SARS-CoV-2 M were subsequently investigated through electrospray ionization (ESI) mass spectrometry (MS) upon a careful optimization of the experimental conditions; the ESI MS spectra provided clear evidence for the formation of tight metallodrug-protein adducts and for the coordination of well defined gold-containing fragments to the SARS-CoV-2 M, again with the only exception of [Au(NHC)]PF, The metal-protein stoichiometry was unambiguously determined for the resulting species. The crystal structures of the metallodrug- M adducts were solved in the case of Au(PEt)Br and Au(NHC)Cl. These crystal structures show that gold coordination occurs at the level of catalytic Cys 145 in the case of Au(NHC)Cl and at the level of both Cys 145 and Cys 156 for Au(PEt)Br. Tight coordination of gold atoms to functionally relevant cysteine residues is believed to represent the true molecular basis of strong enzyme inhibition.

PubMed: 36421689
DOI: 10.3390/biom12111675

実験手法

X-RAY DIFFRACTION (2.42 Å)