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

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 GS115 as a 42 kDa protein that displayed a K m of 15 ± 2 μM with Dabcyl-KTSAVLQSG...

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Veröffentlicht in:Biotechnology letters 2012-05, Vol.34 (5), p.831-838
Hauptverfasser: Nguyen, Thi Thanh Hanh, Woo, Hye-Jin, Kang, Hee-Kyoung, Nguyen, Van Dao, Kim, Young-Min, Kim, Do-Won, Ahn, Sul-Ah, Xia, Yongmei, Kim, Doman
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container_end_page 838
container_issue 5
container_start_page 831
container_title Biotechnology letters
container_volume 34
creator Nguyen, Thi Thanh Hanh
Woo, Hye-Jin
Kang, Hee-Kyoung
Nguyen, Van Dao
Kim, Young-Min
Kim, Do-Won
Ahn, Sul-Ah
Xia, Yongmei
Kim, Doman
description 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 GS115 as a 42 kDa protein that displayed a K m 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 K i 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.
doi_str_mv 10.1007/s10529-011-0845-8
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Recombinant 3CLpro was expressed in Pichia pastoris GS115 as a 42 kDa protein that displayed a K m 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 K i value of 25 ± 1.7 μM. 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subjects Applied Microbiology
Biochemistry
Biological and medical sciences
Biomedical and Life Sciences
Biotechnology
Catechin - analogs & derivatives
Catechin - metabolism
Cysteine Endopeptidases - biosynthesis
Cysteine Endopeptidases - chemistry
Cysteine Endopeptidases - genetics
drugs
energy
epigallocatechin
Flavonoids
Flavonoids - metabolism
Fundamental and applied biological sciences. Psychology
Gallates
Gene Expression
Hydrolysis
Inhibition
Inhibitory Concentration 50
Kinetics
Life Sciences
Microbiology
Molecular Weight
Original Research Paper
Pichia - genetics
Pichia pastoris
Protease
Protease Inhibitors - metabolism
Proteases
proteinases
quercetin
Recombinant
Recombinant Proteins - antagonists & inhibitors
Recombinant Proteins - biosynthesis
Recombinant Proteins - chemistry
Recombinant Proteins - genetics
SARS coronavirus
SARS Virus - enzymology
SARS Virus - genetics
Severe Acute Respiratory Syndrome
Viral Proteins - antagonists & inhibitors
Viral Proteins - biosynthesis
Viral Proteins - chemistry
Viral Proteins - genetics
title Flavonoid-mediated inhibition of SARS coronavirus 3C-like protease expressed in Pichia pastoris
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