A motif from Lys216 to Lys222 in human BUB3 protein is a nuclear localization signal and critical for BUB3 function in mitotic checkpoint.
Zhu S, Jing R, Yang Y, Huang Y, Wang X, Leng Y, Xi J, Wang G, Jia W, Kang J. J Biol Chem. 2015 May 1; 290(18):11282-92. Epub 2015 Mar 26.