This domain of unknown function is found in uncharacterised proteins from Proteobacteria. This domain is approximately 80 amino acids in length and exhibits overlaps with Pfam:PF04717, which suggests that it has an OB fold and, thus, it belongs to the same clan. Many proteins containing this domain are related to the Type VI secretion system and to Phage-related baseplate proteins.

1: Lattice filter for processing image data of three-dimensional protein nanocrystals. van Genderen E, Li YW, Nederlof I, Abrahams JP; Acta Crystallogr D Struct Biol. 2016;72:34-39. PMID:26894532