Research Article

Hepatitis C Virus RNA-Dependent RNA Polymerase Is Regulated by Cysteine S-Glutathionylation

Table 1

Cysteine residues of the recombinant NS5BΔ21 protein that are subjected to S-glutathionylation.

ProteinCysteine residue
143989146170223243274279295303316366521

The recombinant NS5BΔ21Exp1++++
The recombinant NS5BΔ21Exp2++Two1
NS5BΔ21, treated with GSSGExp1+++2Two3+
NS5BΔ21, treated with GSSGExp2+++2Two3+

123The peptide comprising aa 271-298 with three cysteines (C274, C279, and C295) contained two glutathione residues. In the same analysis, no glutathionylation was revealed in a peptide of aa 271-280. A peptide aa 223-259 with two cysteines (C223 and C243) contained one glutathione residue. In a similar sample, the peptide of aa 235-250 was not glutathionylated. The peptide comprising aa 271-298 contained two glutathione residues. In the same analysis, a glutathionylated peptide of aa 251-278 is implying that one of the residues is at C274, and the second is either at C279 or C295.