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  • Title: Purification and characterization of an endoglucanase from the cellulosomes (multicomponent cellulase complexes) of Clostridium thermocellum.
    Author: Mori Y.
    Journal: Biosci Biotechnol Biochem; 1992 Aug; 56(8):1198-203. PubMed ID: 1368835.
    Abstract:
    A subunit with carboxymethyl cellulase (CMCase) activity was isolated from the cellulosomes of Clostridium thermocellum after dissociation of the cellulosomes by a mild sodium dodecyl sulfate (SDS) treatment. The subunit displayed only one protein band of 51 kDa on SDS-polyacrylamide gel electrophoresis (SDS-PAGE), but after boiling with SDS it had 3 bands of 60, 56, and 48 kDa. Prolonged incubation with SDS changed the subunit to display exclusively the 48-kDa band after boiling. The 51-kDa subunit was presumably a partially denatured form, and differentiated into 3 species with apparent M(r) of 60, 56, and 48 k through deglycosylation in SDS solution. Enzymatic properties of the 51-kDa subunit resembled those of the endoglucanase A which was purified from the culture fluid and from a E. coli clone with exceptions of temperature and pH optima.
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