Viral nonstructural protein
# Viral nonstructural protein

In virology, a nonstructural protein is a protein encoded by a virus but that is not part of the viral particle. They typically include the various enzymes and transcription factors the virus uses to replicate itself, such as a viral protease (3CL/nsp5, etc.), an RNA replicase or other template-directed polymerases, and some means to control the host.

## Examples

* NSP1 (rotavirus)
* NSP4 (rotavirus)
* NSP5 (rotavirus)
* Influenza non-structural protein
* NS1 influenza protein
* HBcAg, core antigen of hepatitis B
* Bunyaviridae nonstructural S proteins
