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Recombinant HCV NS3 and NS5B enzymes exhibit multiple posttranslational modifications for potential regulation.
Virus Genes 2019 January 30
Posttranslational modification (PTM) of proteins is critical to modulate protein function and to improve the functional diversity of polypeptides. In this report, we have analyzed the PTM of both hepatitis C virus NS3 and NS5B enzyme proteins, upon their individual expression in insect cells under the baculovirus expression system. Using mass spectrometry, we present evidence that these recombinant proteins exhibit diverse covalent modifications on certain amino acid side chains, such as phosphorylation, ubiquitination, and acetylation. Although the functional implications of these PTM must be further addressed, these data may prove useful toward the understanding of the complex regulation of these key viral enzymes and to uncover novel potential targets for antiviral design.
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