This domain is found in Cip1 from Hypocrea jecorina and similar sequences predominantly found in fungi. Cip1 is a cellulose induced protein with a carbohydrate binding module (Pfam:PF00734) connected via a linker region to a domain with yet unknown function (this entry). This domain shows a beta- sandwich jelly-roll fold with two anti-parallel beta-sheets that consist on eight and seven strands and pack on top of one another. Structural analysis suggest it may function as a lyase [1].

1: The crystal structure of the core domain of a cellulose induced protein (Cip1) from Hypocrea jecorina, at 1.5 A resolution. Jacobson F, Karkehabadi S, Hansson H, Goedegebuur F, Wallace L, Mitchinson C, Piens K, Stals I, Sandgren M; PLoS One. 2013;8:e70562. PMID:24039705