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The NS5B protein, which is an RNA-dependent RNA polymerase, catalyzes hepatitis C virus replication. [10] The hepatitis C virus can cause acute infection but most patients are asymptomatic upon exposure. About one-third of patients develop symptoms such as fatigue, arthralgia and jaundice.
It is also possible that NS5A is a critical component during HCV replication and subcellular localization, which may shed light on the poorly understood HCV life cycle. [ 1 ] [ 4 ] Additionally, NS5A has been shown to modulate the polymerase activity of NS5B , an RNA-dependent RNA polymerase (RdRp) . [ 3 ]
HCV genome. Nonstructural protein 5B (NS5B) is a viral protein found in the hepatitis C virus (HCV). [1] It is an RNA-dependent RNA polymerase, having the key function of replicating HCV's viral RNA by using the viral positive RNA strand as a template to catalyze the polymerization of ribonucleoside triphosphates (rNTP) during RNA replication.
HCV is a positive-sense single-stranded RNA virus that has been demonstrated to replicate in the hepatocytes of both humans and chimpanzees. A single HCV polyprotein is translated, and then cleaved by cellular and viral proteases into three structural proteins (core, E1, and E2) and seven nonstructural proteins (p7, NS2, NS3, NS4A, NS4B, NS5A, and NS5B).
Hepatitis C is an infectious disease caused by the hepatitis C virus (HCV) that primarily affects the liver; [2] it is a type of viral hepatitis. [6] During the initial infection period, people often have mild or no symptoms. [1]
Combinations of sofosbuvir with NS5A inhibitors, such as daclatasvir, ledipasvir or velpatasvir, have shown sustained virological response rates of up to 100% in people infected with HCV. Most studies indicate that the efficacy rate is between 94% and 97%; much higher than previous treatment options.
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