Reovirus type 3 (strain Dearing) Outer capsid protein sigma-3 (His)

Stimulates translation by blocking the activation of the dsRNA-dependent protein kinase EIF2AK2/PKR, thereby inhibiting the host interferon response. Sigma3 prevents the activation of EIF2AK2 by competing with the kinase for dsRNA-binding.; The viral outer shell polypeptides, of which sigma-3 is one, impose structural constraints that prevent elongation of nascent transcripts by the RNA-dependent RNA polymerase lambda-3. Reovirus type 3 (strain Dearing) Outer capsid protein sigma-3 (His) is expressed in E. coli expression system with N-6xHis tag. The predicted molecular weight is 45.2 kDa and the accession number is P03527.