Structure of Xanthomonas axonopodis pv. citri YaeQ reveals a new compact protein fold built around a variation of the PD-[D/E]XK nuclease motif - Guzzo, Cristiane Rodrigues; Nagem, Ronaldo Alves Pinto; Barbosa, João Alexandre Ribeiro Gonçalves; Farah, Chuck Shaker (Proteins - Structure, Function, and Bioinformatics, 2007)