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dc.contributor.authorAbdulrahman, A.Y.
dc.contributor.authorRothan, H.A.
dc.contributor.authorRashid, N.N.
dc.contributor.authorLim, S.K.
dc.contributor.authorSakhor, W.
dc.contributor.authorTee, K.C.
dc.contributor.authorTeoh, T.C.
dc.contributor.authorRahman, N.A.
dc.contributor.authorYusof, R.
dc.description.abstractThe emerging of hepatitis C virus (HCV) resistant strains has been considered as a main drawback of the available drugs. Since HCV has a large inactive surface, we would like to hypothesis that the mutation occur in HCV is minimal and causing less resistance against inhibition. In this study, a short peptide inhibitor of HCV namely plectasin was identified by HCV NS3-4A serine protease assay. Plectasin peptide showed considerable inhibition against HCV NS3-4A serine protease. Enzymatic activity of the recombinant NS3-4Apro was analysed by fluorescence release from several fluorogenic peptide substrates which resembling the dibasic cleavage site sequences of the flavivirus polyprotein precursor. Of all amc-labelled peptides, Pyr-RTKR-amc was the most efficiently cleaved substrate with the lowest Km value of 20 µM. The kinetic assay showed that plectasin peptide inhibited NS3-4Apro activity with an IC50 value of 4.3 μM compared to the aprotinin as a standard proteases inhibitor with an IC50 of 6.1 μM. From the results, plectasin peptide also demonstrated a dose-dependent inhibition of HCV replication with a considerable reduction in RLuc activity at 15 µM using HCV replicon- containing Huh-7 cells. Our study has identified a unique natural peptide that can be used to highlight novel structures for the development of drug derivatives with high efficacy of HCV NS3-4A protease inhibitors. © 2016, Springer Science+Business Media New York.
dc.titleIdentification of Peptide Leads to Inhibit Hepatitis C Virus: Inhibitory Effect of Plectasin Peptide Against Hepatitis C Serine Protease
item.fulltextNo Fulltext-
item.grantfulltextnone- Tenaga Nasional-
Appears in Collections:COE Scholarly Publication
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