This domain is found at the C-terminal end of the SdbC protein from Legionella pneumophila, which is thought to be a virulence factor or effector of the pathogen [1]. The structure of the domain is solved, showing a fold mostly consisting of beta-strands.

1: The Legionella pneumophila genome evolved to accommodate multiple regulatory mechanisms controlled by the CsrA-system. Sahr T, Rusniok C, Impens F, Oliva G, Sismeiro O, Coppee JY, Buchrieser C; PLoS Genet. 2017;13:e1006629. PMID:28212376