The SUZ-C domain is a conserved motif found in one or more copies in several RNA-binding proteins. It is always found at the C-terminus of the protein and appear to be required for localization of the protein to specific subcellular structures. It was first characterized in the C.elegans protein Szy-20 which localizes to the centrosome. It is widely distributed in eukaryotes.

1: The conserved protein SZY-20 opposes the Plk4-related kinase ZYG-1 to limit centrosome size. Song MH, Aravind L, Muller-Reichert T, O'Connell KF; Dev Cell. 2008;15:901-912. PMID:19081077