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Development of potent dipeptide-type SARS-CoV 3CL protease inhibitors with novel P3 scaffolds: design, synthesis, biological evaluation, and docking studies.

Identifieur interne : 001197 ( PubMed/Checkpoint ); précédent : 001196; suivant : 001198

Development of potent dipeptide-type SARS-CoV 3CL protease inhibitors with novel P3 scaffolds: design, synthesis, biological evaluation, and docking studies.

Auteurs : Pillaiyar Thanigaimalai [Japon] ; Sho Konno ; Takehito Yamamoto ; Yuji Koiwai ; Akihiro Taguchi ; Kentaro Takayama ; Fumika Yakushiji ; Kenichi Akaji ; Shen-En Chen ; Aurash Naser-Tavakolian ; Arne Schön ; Ernesto Freire ; Yoshio Hayashi

Source :

RBID : pubmed:23994330

Descripteurs français

English descriptors

Abstract

We report the design and synthesis of a series of dipeptide-type inhibitors with novel P3 scaffolds that display potent inhibitory activity against SARS-CoV 3CLpro. A docking study involving binding between the dipeptidic lead compound 4 and 3CLpro suggested the modification of a structurally flexible P3 N-(3-methoxyphenyl)glycine with various rigid P3 moieties in 4. The modifications led to the identification of several potent derivatives, including 5c-k and 5n with the inhibitory activities (Ki or IC50) in the submicromolar to nanomolar range. Compound 5h, in particular, displayed the most potent inhibitory activity, with a Ki value of 0.006 μM. This potency was 65-fold higher than the potency of the lead compound 4 (Ki=0.39 μM). In addition, the Ki value of 5h was in very good agreement with the binding affinity (16 nM) observed in isothermal titration calorimetry (ITC). A SAR study around the P3 group in the lead 4 led to the identification of a rigid indole-2-carbonyl unit as one of the best P3 moieties (5c). Further optimization showed that a methoxy substitution at the 4-position on the indole unit was highly favorable for enhancing the inhibitory potency.

DOI: 10.1016/j.ejmech.2013.07.037
PubMed: 23994330


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pubmed:23994330

Le document en format XML

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<div type="abstract" xml:lang="en">We report the design and synthesis of a series of dipeptide-type inhibitors with novel P3 scaffolds that display potent inhibitory activity against SARS-CoV 3CLpro. A docking study involving binding between the dipeptidic lead compound 4 and 3CLpro suggested the modification of a structurally flexible P3 N-(3-methoxyphenyl)glycine with various rigid P3 moieties in 4. The modifications led to the identification of several potent derivatives, including 5c-k and 5n with the inhibitory activities (Ki or IC50) in the submicromolar to nanomolar range. Compound 5h, in particular, displayed the most potent inhibitory activity, with a Ki value of 0.006 μM. This potency was 65-fold higher than the potency of the lead compound 4 (Ki=0.39 μM). In addition, the Ki value of 5h was in very good agreement with the binding affinity (16 nM) observed in isothermal titration calorimetry (ITC). A SAR study around the P3 group in the lead 4 led to the identification of a rigid indole-2-carbonyl unit as one of the best P3 moieties (5c). Further optimization showed that a methoxy substitution at the 4-position on the indole unit was highly favorable for enhancing the inhibitory potency.</div>
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