Hyperthermostable Endoglucanase from Pyrococcus horikoshii

Author:

Ando Susumu12,Ishida Hiroyasu3,Kosugi Yoshitsugu3,Ishikawa Kazuhiko1

Affiliation:

1. National Institute of Advanced Industrial Science and Technology (Kansai), Ikeda, Osaka 563-8577

2. Rakuto Kasei Industrial Co. Inc., Otsu, Shiga 520-2277

3. National Institute of Advanced Industrial Science and Technology (Tsukuba), Tsukuba, Ibaraki 305-8566, Japan

Abstract

ABSTRACT An endoglucanase homolog from the hyperthermophilic archaeon Pyrococcus horikoshii was expressed in Escherichia coli , and its enzymatic characteristics were examined. The expressed protein was a hyperthermostable endoglucanase which hydrolyzes celluloses, including Avicel and carboxymethyl cellulose, as well as β-glucose oligomers. This enzyme is the first endoglucanase belonging to glycosidase family 5 found from Pyrococcus species and is also the first hyperthermostable endoglucanase to which celluloses are the best substrates. This enzyme is expected to be useful for industrial hydrolysis of cellulose at high temperatures, particularly in biopolishing of cotton products.

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

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