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Flavonoid-mediated inhibition of SARS coronavirus 3C-like protease expressed in Pichia pastoris

Identifieur interne : 001F85 ( Main/Exploration ); précédent : 001F84; suivant : 001F86

Flavonoid-mediated inhibition of SARS coronavirus 3C-like protease expressed in Pichia pastoris

Auteurs : Thi Thanh Hanh Nguyen [Corée du Sud, États-Unis] ; Hye-Jin Woo [Corée du Sud, États-Unis] ; Hee-Kyoung Kang [Corée du Sud, États-Unis] ; VAN DAO NGUYEN [Viêt Nam] ; Young-Min Kim [Corée du Sud] ; Do-Won Kim [Corée du Sud] ; Sul-Ah Ahn [Corée du Sud] ; YONGMEI XIA [République populaire de Chine] ; Doman Kim [États-Unis]

Source :

RBID : Pascal:12-0198879

Descripteurs français

English descriptors

Abstract

The 3C-like protease (3CLpro) of severe acute respiratory syndrome associated coronavirus (SARS-CoV) is vital for SARS-CoV replication and is a promising drug target. Recombinant 3CLpro was expressed in Pichia pastoris GS 115 as a 42 kDa protein that displayed a Km of 15 ± 2 μM with Dabcyl-KTSAVLQSGFRKME-Edans as substrate. Purified 3CLpro was used for inhibition and kinetic assays with seven flavonoid compounds. The IC50 of six flavonoid compounds were 47-381 μM. Quercetin, epigallocatechin gallate and gallocatechin gallate (GCG) displayed good inhibition toward 3CLpro with IC50 values of 73, 73 and 47 μM, respectively. GCG showed a competitive inhibition pattern with Ki value of 25 ± 1.7 μM. In molecular docking experiments, GCG displayed a binding energy of -14 kcal mol-1 to the active site of 3CLpro and the galloyl moiety at 3-OH position was required for 3CLpro inhibition activity.


Affiliations:


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Le document en format XML

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<name sortKey="Kang, Hee Kyoung" sort="Kang, Hee Kyoung" uniqKey="Kang H" first="Hee-Kyoung" last="Kang">Hee-Kyoung Kang</name>
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</affiliation>
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<author>
<name sortKey="Yongmei Xia" sort="Yongmei Xia" uniqKey="Yongmei Xia" last="Yongmei Xia">YONGMEI XIA</name>
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<country>République populaire de Chine</country>
<wicri:noRegion>214122 Jiangsu</wicri:noRegion>
</affiliation>
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<series>
<title level="j" type="main">Biotechnology letters</title>
<title level="j" type="abbreviated">Biotechnol. lett.</title>
<idno type="ISSN">0141-5492</idno>
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<term>Coronavirus</term>
<term>Flavonoid</term>
<term>Inhibition</term>
<term>Peptidases</term>
<term>Pichia pastoris</term>
<term>Severe acute respiratory syndrome</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr">
<term>Flavonoïde</term>
<term>Inhibition</term>
<term>Peptidases</term>
<term>Syndrome respiratoire aigu sévère</term>
<term>Coronavirus</term>
<term>Pichia pastoris</term>
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<front>
<div type="abstract" xml:lang="en">The 3C-like protease (3CL
<sup>pro</sup>
) of severe acute respiratory syndrome associated coronavirus (SARS-CoV) is vital for SARS-CoV replication and is a promising drug target. Recombinant 3CL
<sup>pro</sup>
was expressed in Pichia pastoris GS 115 as a 42 kDa protein that displayed a K
<sub>m</sub>
of 15 ± 2 μM with Dabcyl-KTSAVLQSGFRKME-Edans as substrate. Purified 3CL
<sup>pro</sup>
was used for inhibition and kinetic assays with seven flavonoid compounds. The IC
<sub>50</sub>
of six flavonoid compounds were 47-381 μM. Quercetin, epigallocatechin gallate and gallocatechin gallate (GCG) displayed good inhibition toward 3CL
<sup>pro</sup>
with IC
<sub>50</sub>
values of 73, 73 and 47 μM, respectively. GCG showed a competitive inhibition pattern with K
<sub>i</sub>
value of 25 ± 1.7 μM. In molecular docking experiments, GCG displayed a binding energy of -14 kcal mol
<sup>-1</sup>
to the active site of 3CL
<sup>pro</sup>
and the galloyl moiety at 3-OH position was required for 3CL
<sup>pro</sup>
inhibition activity.</div>
</front>
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<li>Corée du Sud</li>
<li>République populaire de Chine</li>
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<name sortKey="Hanh Nguyen, Thi Thanh" sort="Hanh Nguyen, Thi Thanh" uniqKey="Hanh Nguyen T" first="Thi Thanh" last="Hanh Nguyen">Thi Thanh Hanh Nguyen</name>
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<country name="Viêt Nam">
<noRegion>
<name sortKey="Van Dao Nguyen" sort="Van Dao Nguyen" uniqKey="Van Dao Nguyen" last="Van Dao Nguyen">VAN DAO NGUYEN</name>
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<noRegion>
<name sortKey="Yongmei Xia" sort="Yongmei Xia" uniqKey="Yongmei Xia" last="Yongmei Xia">YONGMEI XIA</name>
</noRegion>
</country>
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</affiliations>
</record>

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