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. 2020 Apr 18;14(4):407–412. doi: 10.1016/j.dsx.2020.04.020

Table 1.

Nonstructural proteins of coronaviruses and their function [10,20].

Nonstructural Protein (nsp) Function
nsp 1 & 3 Inhibition of IFN signaling and blocking of host innate immune response by promotion of cellular degradation and blocks translation of host’s RNA
nsp 2 Binding to prohibition protein
nsp3 & 5 Promoting cytokine expression and cleavage of viral polyprotein
nsp 4 & 6 Contribute to structure of DMVs as transmembrane scaffold protein (DMVs formation)
nsp 7/8 complex Processivity clamp for RNA polymerase by arms hexadecameric complex
nsp9 RNA binding protein phosphatase
nsp 10, 16 & 14 Stimulation of ExoN and 2-O-MT activity
nsp 12 Replication enzyme (RNA-dependent RNA polymerase)
nsp 13 RNA helicase, 5′ triphosphatase
nsp 14 Proofreading of viral genome
nsp 15 Viral endoribonuclease and chymotrypsin-like protease
nsp 16 Avoiding MDA5 recognition and inhibit innate immunity regulation