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  • Title: An endo-1,4-β-glucanase PdCel5C from cellulolytic fungus Penicillium decumbens with distinctive domain composition and hydrolysis product profile.
    Author: Liu G, Qin Y, Hu Y, Gao M, Peng S, Qu Y.
    Journal: Enzyme Microb Technol; 2013 Mar 05; 52(3):190-5. PubMed ID: 23410931.
    Abstract:
    Cellulases from fungi typically contain one catalytic domain with or without a cellulose-binding domain. We characterized an endo-acting cellulase PdCel5C from industrial cellulase-producing fungus Penicillium decumbens with distinctive domain composition. In addition to a cellulose-binding domain and a catalytic domain, PdCel5C contains two immunoglobulin (Ig)-like domains near the C-terminal end. Truncated mutation experiment reveals that the two Ig-like domains are important for the hydrolytic activity of PdCel5C. Moreover, PdCel5C releases cello-oligosaccharides from cellulosic substrates, which is different from that of most characterized cellulases in the same glycoside hydrolase family 5. To the best of our knowledge, this is the first report on the characterization of an Ig-like domain-containing cellulase in fungi. The results expand our understanding on the diversity of cellulases in fungi, and suggest possible shared catalytic mechanisms between bacterial and fungal cellulases.
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