Bacterial Cellulose Hydrolysis in Anaerobic Environmental Subsystems--Clostridium thermocellum and Clostridium stercorarium, Thermophilic Plant-fiber Degraders.

Bacterial Cellulose Hydrolysis in Anaerobic Environmental Subsystems--Clostridium thermocellum and Clostridium stercorarium, Thermophilic Plant-fiber Degraders. Research Abstract Details 

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Bacterial Cellulose Hydrolysis in Anaerobic Environmental Subsystems--Clostridium thermocellum and Clostridium stercorarium, Thermophilic Plant-fiber Degraders. Abstract Text:

Vladimir V Zverlov,Wolfgang H Schwarz,

Cellulose degradation is a rare trait in bacteria. However, the truly cellulolytic bacteria are extremely efficient hydrolyzers of plant cell wall polysaccharides, especially those in thermophilic anaerobic ecosystems. Clostridium stercorarium, a thermophilic ubiquitous soil dweller, has a simple cellulose hydrolyzing enzyme system of only two cellulases. However, it seems to be better suited for the hydrolysis of a wide range of hemicelluloses. Clostridium thermocellum, an ubiquitous thermophilic gram-type positive bacterium, is one of the most successful cellulose degraders known. Its extracellular enzyme complex, the cellulosome, was prepared from C. thermocellum cultures grown on cellulose, cellobiose, barley beta-1,3-1,4-glucan, or a mixture of xylan and cellulose. The single proteins were identified by peptide chromatography and MALDI-TOF-TOF. Eight cellulosomal proteins could be found in all eight preparations, 32 proteins occur in at least one preparation. A number of enzymatic components had not been identified previously. The proportion of components changes if C. thermocellum is grown on different substrates. Mutants of C. thermocellum, devoid of scaffoldin CipA, that now allow new types of experiments with in vitro cellulosome reassembly and a role in cellulose hydrolysis are described. The characteristics of these mutants provide strong evidence of the positive effect of complex (cellulosome) formation on hydrolysis of crystalline cellulose.

Bacterial Cellulose Hydrolysis in Anaerobic Environmental Subsystems--Clostridium thermocellum and Clostridium stercorarium, Thermophilic Plant-fiber Degraders. Publishing Authors By Initials

VV Zverlov,WH Schwarz,

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Bacterial Cellulose Hydrolysis in Anaerobic Environmental Subsystems--Clostridium thermocellum and Clostridium stercorarium, Thermophilic Plant-fiber Degraders. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Annals of the New York Academy of Sciences

VOLUME: 1125

Page Numbers: 298-307

Journal Abbreviation: Ann. N. Y. Acad. Sci.

ISSN: 0077-8923

DAY: 1

MONTH: Apr

YEAR: 2008

Bacterial Cellulose Hydrolysis in Anaerobic Environmental Subsystems--Clostridium thermocellum and Clostridium stercorarium, Thermophilic Plant-fiber Degraders. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Bacterial Cellulose Hydrolysis in Anaerobic Environmental Subsystems--Clostridium thermocellum and Clostridium stercorarium, Thermophilic Plant-fiber Degraders.

AFFILIATION: Department of Microbiology, TUM, Am Hochanger 4, D-85350 Freising, Germany. +49-8161-715445. wschwarz@wzw.tum.de.

Country: United States

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MEDLINETA: Ann N Y Acad Sci

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