HCV Protease

HCV NS3-4A serine protease is a critical enzyme in the hepatitis C virus life cycle, essential for polyprotein processing, RNA replication, and virion formation. It functions as a complex with NS4A and possesses both protease and NTPase/RNA helicase activities. This protease plays a key role in immune evasion by cleaving and inactivating host signaling molecules MAVS and TRIF, thereby suppressing interferon production. HCV infection leads to chronic liver diseases such as steatosis, fibrosis, cirrhosis, and hepatocellular carcinoma. Due to its pivotal role in viral replication and immune escape, the NS3-4A protease is a major target for antiviral drug development.