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Table 14.10 Function and properties of hepatitis E virus proteins

From: Viruses with Single-Stranded, Positive-Sense RNA Genomes

Protein

Size (kDa)

Properties

Function

Capsid protein

76

Dimer; signal peptide is cleaved, partially glycosylated

Capsid protein

Capsid protein

14.5

?

Soluble protein in virions, cleavage product of the 76-kDa capsid protein?

Methyltransferase/guanylyltransferase

110

?

Capping of genomic and subgenomic RNA molecules

Protease

?

Homology to cysteine proteases

Cleaves the precursor of non-structural proteins

RNA helicase

?

NTP-binding

Resolution of RNA secondary structures

RNA-dependent RNA polymerase

?

?

Replication

Synthesis of subgenomic RNA

pORF3

13.5

Phosphorylated, homodimer

Associated with cytoskeleton