Tombusvirus p19PDB ID: 1R9F
Small interfering RNA are short pieces of double-stranded RNA used in defense against viral infection. This structure includes a viral protein that blocks this defense by binding to siRNA.
Recognition of small interfering RNA by a viral suppressor of RNA
Ye, K., Malinina, L., Patel, D.J.
Journal: (2003) Nature 426: 874-878