A central region in the hepatitis C virus NS4A protein allows formation of an active NS3-NS4A serine proteinase complex in vivo and in vitro
Key result
A synthetic peptide spanning hepatitis C virus NS4A residues 22 to 34 successfully substituted for intact NS4A in forming an active NS3-NS4A serine proteinase complex in a cell-free assay.
Population
In vitro and in vivo models studying hepatitis C virus NS3-NS4A serine proteinase complex
Comparison
NS4A mutations and synthetic peptide vs Intact NS4A / wild-type
Design
Preclinical
Authors
Discussion
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Member takes
Implication
No clinical implications yet; leaves open NS4A central region as antiviral target for future study.
Structured PICO
P
Population
In vitro and in vivo models studying hepatitis C virus NS3-NS4A serine proteinase complex
I
Intervention
NS4A mutations and synthetic peptide (spanning NS4A residues 22 to 34)
C
Comparator
Intact NS4A / wild-type
O
Outcome
NS4A-dependent processing and NS3-NS4A complex stability
The central region of the HCV NS4A protein forms a stable interaction with the NS3 catalytic domain, representing a potential target for antiviral compounds.
Cite This Study
Lin et al. (1995) studied Hepatitis C. Synthetic peptide (NS4A residues 22-34) and NS4A mutations was evaluated on NS3-NS4A complex formation and serine proteinase cleavage activity. A synthetic peptide spanning hepatitis C virus NS4A residues 22 to 34 successfully substituted for intact NS4A in forming an active NS3-NS4A serine proteinase complex in a cell-free assay.