An endo-1,4-β-glucanase PdCel5C from cellulolytic fungus Penicillium decumbens with distinctive domain composition and hydrolysis product profile

► The first report on a fungal cellulase containing immunoglobulin-like domains. ► Immunoglobulin-like domains are crucial for the hydrolytic activity of PdCel5C. ► Some catalytic mechanisms may be shared between bacterial and fungal cellulases. ► PdCel5C shows distinctive hydrolysis product file when acting on cellulose.