Figure 4
From: Effect of attC structure on cassette excision by integron integrases
cis and trans extrahelical base interactions. (a) cis interactions of the VchIntIA non-attacking subunit made by P232, H240 and H241 (in blue) with the extrahelical base T12''. (b) trans interactions of the VchIntIA attacking subunit made by Q145, W157, K209, Y210 and W219 (in magenta) with the extrahelical base G20''. The non-attacking subunit is in yellow, the attacking subunit in green, DNA in orange, and the extrahelical bases T12'' and G20'' are in red. (Based on the structure of the VchIntIA-VCRbs complex (PDB:2A3V) [29].