title: Isolation and characterization of a multienzyme complex (cellulosome) of the Paenibacillus curdlanolyticus B-6 grown on Avicel under aerobic conditions.
abstract: A multienzyme complex, cellulosome, of the facultatively anaerobic bacterium, Paenibacillus curdlanolyticus B-6 was produced on microcrystalline cellulose (Avicel) under aerobic conditions. During growth on Avicel, the bacterial cells were found to be capable of adhesion to Avicel by scanning electron microscopic (SEM) analysis. The multienzyme complex of P. curdlanolyticus B-6 was isolated from the crude enzyme preparation by gel filtration chromatography on Sephacryl S-300 and affinity purification on cellulose. The isolated multienzyme complex was able to bind to both Avicel and insoluble xylan and consists of cellulolytic and xylanolytic enzymes such as avicelase, carboxymethyl cellulase (CMCase), cellobiohydrolase, beta-glucosidase, xylanase, beta-xylosidase and alpha-l-arabinofuranosidase. The molecular mass of the complex was estimated to be 1600 kDa. It composed of at least 12 proteins on SDS-PAGE and 10 CMCases and 11 xylanases on zymograms. The isolated multienzyme complex could degrade the raw lignocellulosic substances effectively.
authors.affiliation: School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkuntien, Bangkok 10150, Thailand.
authors.forename: Rattiya
authors.initials: R
authors.lastname: Waeonukul
authors.forename: Khin Lay
authors.initials: KL
authors.lastname: Kyu
authors.forename: Kazuo
authors.initials: K
authors.lastname: Sakka
authors.forename: Khanok
authors.initials: K
authors.lastname: Ratanakhanokchai
mesh_terms: D000332:Aerobiosis; D001426:Bacterial Proteins / Q000378:metabolism*; D002482:Cellulose / Q000378:metabolism*; D044603:Cellulosomes / Q000378:metabolism*; D016937:Gram-Positive Endospore-Forming Rods / Q000201:enzymology*; D009097:Multienzyme Complexes / Q000378:metabolism*; D014990:Xylans / Q000378:metabolism
chemical_list: D001426:Bacterial Proteins; D009097:Multienzyme Complexes; D014990:Xylans; D002482:Cellulose