An Active of Extracellular Cellulose Degrading Enzyme from Termite Bacterial Endosimbiont
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2015
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Abstract
Cellulase is an ezyme that specifically cleaves the 1,4-β-glycosidic bond of cellulose to produce the small fragments of simple carbohydrate. This work was aimed to characterize the extracellular cellulase from Paenibacillus spp., which was previously isolated from macro termites, Odontotermes bhagwatii in our laboratory. Two Paenibacillus isolates were used in this experiment, namely Paenibacillus cellulositrophicus SBT1 and Paenibacillus , sp. SBT8. Analysis of the total proteins in the supernatants showed that P. cellulositrophicus SBT1 and Paenibacillus sp. SBT8 roughly produced as much as 18.6 mg/l and 24.8 mg/l of extracellular cellulases, respectively. Enzymatic assay showed that SBT1 and SBT8 cellulase exhibited enzymatic acitivity of 0.17 U/ mg and 0.12 U/mg, respectively. Temperature dependencies analysis indicated that both cellulases exhibited maximum activity at 35 o C. At the temperature higher than 55 o C, the enzymatic activities of both cellulases were roughly 20% reduced compared to the maximum activity. SBT1 and SBT8 cellulases were both active at acidic pH. At basic pH (pH 8) the enzymatic activities of both cellulases were reduced roughly 30% compared to that of acidic pH. Supplementing of Mg 2+ , Zn 2+ , and Ca 2+ in range of 1-10 mM increased the enzymatic activity of both cellulases roughly 33 to 50%.
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rohman2015anindonesian
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| Authors | M. Saifur Rohman;Endang Pamulatsih;Yudi Kusnadi;Triwibowo Yuwono;Erni Martani; |
| Journal | indonesian journal of biotechnology |
| Year | 2015 |
| DOI |
10.22146/ijbiotech.15273
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