This domain is found associated with a wide variety of cellulose binding domains. This is a family of two very closely related proteins that together act as both a C1- and a C4-oxidising lytic polysaccharide mono-oxygenase [2], degrading cellulose. This domain is also found in baculoviral spheroidins and spindolins, protein of unknown function.

1: The novel lectin-like protein CHB1 is encoded by a chitin-inducible Streptomyces olivaceoviridis gene and binds specifically to crystalline alpha-chitin of fungi and other organisms. Schnellmann J, Zeltins A, Blaak H, Schrempf H; Mol Microbiol 1994;13:807-819. PMID:7815940

2: Structural and functional characterization of a conserved pair of bacterial cellulose-oxidizing lytic polysaccharide monooxygenases. Forsberg Z, Mackenzie AK, Sorlie M, Rohr AK, Helland R, Arvai AS, Vaaje-Kolstad G, Eijsink VG; Proc Natl Acad Sci U S A. 2014;111:8446-8451. PMID:24912171