Protein: Nucleoprotein (EC 3.1.13.-) (Nucleocapsid protein) (Protein N) (P13699)
Organism: Lassa virus (strain Mouse/Sierra Leone/Josiah/1976) (LASV)
Function: Encapsidates the genome, protecting it from nucleases. The encapsidated genomic RNA is termed the nucleocapsid (NC). Serves as template for viral transcription and replication. The increased presence of protein N in host cell does not seem to trigger the switch from transcription to replication as observed in other negative strain RNA viruses. Through the interaction with host IKBKE, strongly inhibits the phosphorylation and nuclear translocation of host IRF3, a protein involved in interferon activation pathway, leading to the inhibition of interferon-beta and IRF3-dependent promoters activation. Encodes also a functional 3'-5' exoribonuclease that degrades preferentially dsRNA substrates and thereby participates in the suppression of interferon induction.
Subcellular location: Virion {ECO:0000255|HAMAP-Rule:MF_04085}. Host cytoplasm {ECO:0000255|HAMAP-Rule:MF_04085}.
Sequence: MSASKEIKSFLWTQSLRRELSGYCSNIKLQVVKDAQALLHGLDFSEVSNVQRLMRKERRDDNDLKRLRDLNQAVNNLVELKSTQQKSILRVGTLTSDDLLILAADLEKLKSKVIRTERPLSAGVYMGNLSSQQLDQRRALLNMIGMSGGNQGARAGRDGVVRVWDVKNAELLNNQFGTMPSLTLACLTKQGQVDLNDAVQALTDLGLIYTAKYPNTSDLDRLTQSHPILNMIDTKKSSLNISGYNFSLGAAVKAGACMLDGGNMLETIKVSPQTMDGILKSILKVKKALGMFISDTPGERNPYENILYKICLSGDGWPYIASRTSITGRAWENTVVDLESDGKPQKADSNNSSKSLQSAGFTAGLTYSQLMTLKDAMLQLDPNAKTWMDIEGRPEDPVEIALYQPSSGCYIHFFREPTDLKQFKQDAKYSHGIDVTDLFATQPGLTSAVIDALPRNMVITCQGSDDIRKLLESQGRKDIKLIDIALSKTDSRKYENAVWDQYKDLCHMHTGVVVEKKKRGGKEEITPHCALMDCIMFDAAVSGGLNTSVLRAVLPRDMVFRTSTPRVVL
InterPro domains: - IPR001680: WD40 repeat (repeat) [155-174]
- IPR035083: Nucleocapsid, N-terminal, Arenaviridae (domain) [4-339]
- IPR038115: Nucleocapsid, C-terminal superfamily (homologous_superfamily) [360-562]
- IPR000229: Nucleocapsid protein, arenaviridae (family) [1-569]
- IPR035084: Nucleocapsid, C-terminal, Arenaviridae (domain) [363-543]
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0005515 (protein binding)
Biological Process (BP): GO:0008150 (biological process), GO:0065007 (biological regulation), GO:0050896 (response to stimulus), GO:0050789 (regulation of biological process), GO:0044419 (biological process involved in interspecies interaction between organisms), GO:0048519 (negative regulation of biological process), GO:0009605 (response to external stimulus), GO:0044068 (modulation by symbiont of host cellular process), GO:0009607 (response to biotic stimulus), GO:0050794 (regulation of cellular process), GO:0048583 (regulation of response to stimulus), GO:0002682 (regulation of immune system process), GO:0035821 (modulation of process of another organism), GO:0044403 (biological process involved in symbiotic interaction), GO:0051707 (response to other organism), GO:0048585 (negative regulation of response to stimulus), GO:0051701 (biological process involved in interaction with host), GO:0031341 (regulation of cell killing), GO:0050776 (regulation of immune response), GO:0043207 (response to external biotic stimulus), GO:0052173 (response to defenses of other organism), GO:0080134 (regulation of response to stress), GO:0044003 (modulation by symbiont of host process), GO:0075136 (response to host), GO:0031348 (negative regulation of defense response), GO:0044414 (suppression of host defenses by symbiont), GO:0031347 (regulation of defense response), GO:0052200 (response to host defenses), GO:0052031 (modulation by symbiont of host defense response), GO:0019049 (mitigation of host antiviral defense response), GO:0052170 (suppression by symbiont of host innate immune response), GO:0052572 (response to host immune response), GO:0030682 (mitigation of host defenses by symbiont), GO:0052553 (modulation by symbiont of host immune response), GO:0052167 (modulation by symbiont of host innate immune response), GO:0052562 (suppression by symbiont of host immune response)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0018995 (host cellular component), GO:0043657 (host cell), GO:0033643 (host cell part), GO:0033646 (host intracellular part), GO:0043656 (host intracellular region), GO:0033647 (host intracellular organelle), GO:0033648 (host intracellular membrane-bounded organelle), GO:0042025 (host cell nucleus)