Nucleoprotein

UniProtKB accession:  P04857

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UniProtKB description:  Forms the helical nucleocapsid (NC) in a ratio of 1 N per 6 ribonucleotides, protecting the genome from nucleases (By similarity). The NC has a helical structure with either 13.07 N per turn, approximately 20 nm in diameter, with a hollow central cavity approximately 5 nm in diameter (PubMed:2539515). The encapsidated genomic RNA serves as template for transcription and replication; encapsidation by N is coupled to RNA synthesis. Forms the encapsidation complex with the phosphoprotein protein P. Before encapsidation, the newly synthesized free N protein, so-called N0, is chaperoned by P (By similarity).