YjgF_Endoribonuc is a putative endoribonuclease. The structure is of beta-alpha-beta-alpha-beta(2) domains common both to bacterial chorismate mutase and to members of the YjgF family. These proteins form trimers with a three-fold symmetry with three closely-packed beta-sheets. The YjgF family is a large, widely distributed family of proteins of unknown biochemical function that are highly conserved among eubacteria, archaea and eukaryotes [1].

1: A test case for structure-based functional assignment: the 1.2 A crystal structure of the yjgF gene product from Escherichia coli. Volz K; Protein Sci. 1999;8:2428-2437. PMID:10595546