title: Synergistic activity of Paenibacillus sp. BP-23 cellobiohydrolase Cel48C in association with the contiguous endoglucanase Cel9B and with endo- or exo-acting glucanases from Thermobifida fusca.
abstract: Cellobiohydrolase Cel48C from Paenibacillus sp. BP-23, an enzyme displaying limited activity on most cellulosic substrates, was assayed for activity in the presence of other bacterial endo- or exocellulases. Significant enhanced activity was observed when Cel48C was incubated in the presence of Paenibacillus sp. BP-23 endoglucanase Cel9B or Thermobifida fusca cellulases Cel6A and Cel6B, indicating that Cel48C acts synergistically with them. Maximum synergism rates on bacterial microcrystalline cellulose or filter paper were obtained with a mixture of Paenibacillus cellulases Cel9B and Cel48C, accompanied by T. fusca exocellulase Cel6B. Synergism was also observed in cell extracts from recombinant clone E. coli pUCel9-Cel48 expressing the two contiguous Paenibacillus cellulases Cel9B and Cel48C. The enhanced cellulolytic activity displayed by the cellulase mixtures assayed could be used as an efficient tool for biotechnological applications like pulp and paper manufacturing.
authors.affiliation: Department of Microbiology, Faculty of Biology, University of Barcelona, Av. Diagonal 645, 08028-Barcelona, Spain.
authors.forename: Marta M
authors.initials: MM
authors.lastname: Sánchez
authors.forename: Diana C
authors.initials: DC
authors.lastname: Irwin
authors.forename: F I Javier
authors.initials: FI
authors.lastname: Pastor
authors.forename: David B
authors.initials: DB
authors.lastname: Wilson
authors.forename: Pilar
authors.initials: P
authors.lastname: Diaz
mesh_terms: D000192:Actinomycetales / Q000201:enzymology*; D001407:Bacillus / Q000201:enzymology* / Q000254:growth & development; D002266:Carboxymethylcellulose Sodium / Q000378:metabolism; D002475:Cellobiose / Q000032:analysis / Q000378:metabolism; D002480:Cellulase / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D002482:Cellulose / Q000378:metabolism*; D043366:Cellulose 1,4-beta-Cellobiosidase / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D002855:Chromatography, Thin Layer; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000235:genetics; D005947:Glucose / Q000378:metabolism; D006026:Glycoside Hydrolases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D007526:Isoelectric Point; D007700:Kinetics; D009844:Oligosaccharides / Q000032:analysis; D011994:Recombinant Proteins / Q000378:metabolism; D013379:Substrate Specificity
chemical_list: D009844:Oligosaccharides; D011994:Recombinant Proteins; D002475:Cellobiose; D002482:Cellulose; D006026:Glycoside Hydrolases; D002480:Cellulase; D043366:Cellulose 1,4-beta-Cellobiosidase; D005947:Glucose; D002266:Carboxymethylcellulose Sodium; C109691:microcrystalline cellulose