A fast and efficient separation procedure for the analysis of the cellulase components of the thermophilic anaerobe Clostridium stercorarium was developed. Culture respernatants were concentrated without loss of cellulase activity by tangential flow ultrafiltration. Resolution of the cellulase system was achieved by fast protein liquid chromatography (FPLC) on a Mono Q anion exchange column. Enzyme fractions were assayed for hydrolysis of Avicel, carboxymethylcellulose (CMC), β-nitrophenyl-β-d-cellobioside, and p-nitrophenyl-β-d-glucoside. Two Avicelases, two β-cellobiosidases, and one β-glucosidase were identified and characterized by SDS-polyacrylamide electrophoresis and isoelectric focusing. On the basis of their activities towards CMC, Avicelase I was classified as endo-β-glucanase and Avicelase II as exo-β-glucanase. Efficient hydrolysis of microcrystalline cellulose was shown to result from the combined action of both Avicelases.
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Bronnenmeier, K., Staudenbauer, W.L. Resolution of Clostridium stercorarium cellulase by fast protein liquid chromatography (FPLC). Appl Microbiol Biotechnol 27, 432–436 (1988). https://doi.org/10.1007/BF00451608
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