ORF4
Function
Viral suppressor of RNA silencing which binds specifically to silencing RNAs (siRNAs). Acts as a molecular caliper to specifically select siRNAs based on the length of the duplex region of the RNA (By similarity).
Sequence Similarities
Belongs to the tombusvirus protein p19 family.
Alternative names
RNA silencing suppressor p19, 19 kDa symptom severity modulator, ORF4