Editing Plant virus (section)

===Genome packaging===
Besides involvement in the infection process, [[viral replicase]] is a directly necessary part of the [[genome packaging|packaging of RNA viruses' genetic material]]. This was expected due to replicase involvement already being confirmed in various other viruses.<ref name="Rao-2006">{{cite journal |last=Rao |first=A.L.N. |title=Genome Packaging by Spherical Plant RNA Viruses |journal=[[Annual Review of Phytopathology]] |publisher=[[Annual Reviews (publisher)|Annual Reviews]] |volume=44 |issue=1 |year=2006 |doi=10.1146/annurev.phyto.44.070505.143334 |pages=61–87 |pmid=16480335 }}</ref>

The genome of Beet necrotic yellow vein virus (BNYVV) consists of five RNAs, each encapsidated into rod-shaped virus particles. RNA 1, which is 6746 nucleotides long, encodes a single open reading frame (ORF) that produces the 237 kDa protein P237. This protein is cleaved into P150 and P66 by a papain-like proteinase. RNA 2, 4612 nucleotides long, encodes six proteins, including movement proteins (P42, P13, P15), a coat protein (P21), and a regulatory protein (P14). RNA 3, 1775 nucleotides long, encodes P25, which is involved in symptom expression. RNA 4, 1431 nucleotides long, encodes P31, crucial for vector transmission. RNA 5, found in certain isolates, encodes P26 and is associated with more severe symptoms.<ref>{{Cite journal |last=Tamada |first=T. |last2=Abe |first2=H. |date=1989-12-01 |title=Evidence that Beet Necrotic Yellow Vein Virus RNA-4 Is Essential for Efficient Transmission by the Fungus Polymyxa betae |url=https://www.microbiologyresearch.org/content/journal/jgv/10.1099/0022-1317-70-12-3391 |journal=Journal of General Virology |language=en |volume=70 |issue=12 |pages=3391–3398 |doi=10.1099/0022-1317-70-12-3391 |issn=0022-1317}}</ref>