title: Gene cloning and heterologous expression of glycoside hydrolase family 55 beta-1,3-glucanase from the basidiomycete Phanerochaete chrysosporium.
abstract: The basidiomycete Phanerochaete chrysosporium produces several beta-1,3-glucanases when grown on laminarin, a beta-1,3/1,6-glucan, as the sole carbon source. To characterize one of the major unknown beta-1, 3-glucanases with a molecular mass of 83 kDa, identification, cloning, and heterologous over-expression were carried out using the total genomic information of P. chrysosporium. The cDNA encoding this enzyme included an ORF of 2337 bp and the deduced amino acid sequence contains a predicted signal peptide of 26 amino acids and the mature protein of 752 amino acids. The amino acid sequence showed a significant similarity with glycoside hydrolase family 55 enzymes from filamentous fungi and was named Lam55A. Since the recombinant Lam55A expressed in the methylotrophic yeast Pichia pastoris degraded branched beta-1,3/1,6-glucan as well as linear beta-1,3-glucan, the kinetic features of the enzyme were compared with those of other beta-1,3-glucanases.
authors.affiliation: Department of Biomaterials Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.
authors.forename: Rie
authors.initials: R
authors.lastname: Kawai
authors.forename: Kiyohiko
authors.initials: K
authors.lastname: Igarashi
authors.forename: Masahiro
authors.initials: M
authors.lastname: Samejima
mesh_terms: D000595:Amino Acid Sequence; D018076:DNA, Complementary / Q000235:genetics; D043326:Glucan 1,3-beta-Glucosidase / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D005936:Glucans; D008969:Molecular Sequence Data; D020075:Phanerochaete / Q000201:enzymology* / Q000235:genetics; D011134:Polysaccharides / Q000378:metabolism; D011994:Recombinant Proteins / Q000096:biosynthesis; D013379:Substrate Specificity
chemical_list: D018076:DNA, Complementary; D005936:Glucans; D011134:Polysaccharides; D011994:Recombinant Proteins; C008247:laminaran; D043326:Glucan 1,3-beta-Glucosidase