Characterisation of wild-type and engineered thermostable cellobiohydrolases from glycosyl hydrolase family 7

Sanni Voutilainen, Harry Boer, Terhi Puranen, Matti Siika-aho, Marika Alapuranen, Liisa Viikari, Jari Vehmaanperä, Anu Koivula

Research output: Contribution to conferenceConference articleScientific

Abstract

Cellulases are important industrial enzymes, which can be used e.g. in the pulp and paper, textile, and detergent industry, as well as for the conversion of cellulosic biomass to ethanol, a transport fuel. Thermostable enzymes are needed in many of these applications. Thermophilic organisms are a potential source for thermostable enzymes for industrial applications. As an alternative, the thermostability of an enzyme can be improved by structure-based rational mutagenesis or directed evolution methods. Here, we present the characterisation of the enzymatic properties of four novel thermostable cellobiohydrolases originating from the thermophililic fungi Acremonium thermophilum, Chaetomium thermophilum, Melanocarpus albomyces and Thermoascus aurantiacus. These GH-7 family enzymes were expressed in the industrially relevant production host Trichoderma reesei, and the kinetics on small soluble substrates, cellobiose inhibition, crystalline cellulose hydrolysis and thermostability of the purified enzymes were determined. Enzymatic properties of these cellobiohydrolases were compared to those of the T.reesei cellobiohydrolase Cel7A, one of the most thoroughly studied fungal cellobiohydrolases. In addition, protein engineering of yeast expressed M. albomyces Cel7B was performed leading to a further improvement of its thermostability. Acknowledgements: This work has been supported by grants from the EU (“Technological improvement for ethanol production from lignocellulose” project; coordinator L. Viikari, VTT), the Academy of Finland (SV) and the Glycoscience Graduate School (SV).
Original languageEnglish
Publication statusPublished - 2007
MoE publication typeNot Eligible
Event7th Carbohydrate Bioengineering Meeting - Braunschweig, Germany
Duration: 22 Apr 200725 Apr 2007

Conference

Conference7th Carbohydrate Bioengineering Meeting
CountryGermany
CityBraunschweig
Period22/04/0725/04/07

Fingerprint

cellulose 1,4-beta-cellobiosidase
glycosidases
enzymes
thermal stability
thermophilic microorganisms
protein engineering
Chaetomium
Acremonium
Trichoderma reesei
lignocellulose
cellobiose
cellulases
industrial applications
ethanol production
mutagenesis
detergents
Finland
pulp
cellulose
hydrolysis

Cite this

Voutilainen, S., Boer, H., Puranen, T., Siika-aho, M., Alapuranen, M., Viikari, L., ... Koivula, A. (2007). Characterisation of wild-type and engineered thermostable cellobiohydrolases from glycosyl hydrolase family 7. Paper presented at 7th Carbohydrate Bioengineering Meeting, Braunschweig, Germany.
Voutilainen, Sanni ; Boer, Harry ; Puranen, Terhi ; Siika-aho, Matti ; Alapuranen, Marika ; Viikari, Liisa ; Vehmaanperä, Jari ; Koivula, Anu. / Characterisation of wild-type and engineered thermostable cellobiohydrolases from glycosyl hydrolase family 7. Paper presented at 7th Carbohydrate Bioengineering Meeting, Braunschweig, Germany.
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title = "Characterisation of wild-type and engineered thermostable cellobiohydrolases from glycosyl hydrolase family 7",
abstract = "Cellulases are important industrial enzymes, which can be used e.g. in the pulp and paper, textile, and detergent industry, as well as for the conversion of cellulosic biomass to ethanol, a transport fuel. Thermostable enzymes are needed in many of these applications. Thermophilic organisms are a potential source for thermostable enzymes for industrial applications. As an alternative, the thermostability of an enzyme can be improved by structure-based rational mutagenesis or directed evolution methods. Here, we present the characterisation of the enzymatic properties of four novel thermostable cellobiohydrolases originating from the thermophililic fungi Acremonium thermophilum, Chaetomium thermophilum, Melanocarpus albomyces and Thermoascus aurantiacus. These GH-7 family enzymes were expressed in the industrially relevant production host Trichoderma reesei, and the kinetics on small soluble substrates, cellobiose inhibition, crystalline cellulose hydrolysis and thermostability of the purified enzymes were determined. Enzymatic properties of these cellobiohydrolases were compared to those of the T.reesei cellobiohydrolase Cel7A, one of the most thoroughly studied fungal cellobiohydrolases. In addition, protein engineering of yeast expressed M. albomyces Cel7B was performed leading to a further improvement of its thermostability. Acknowledgements: This work has been supported by grants from the EU (“Technological improvement for ethanol production from lignocellulose” project; coordinator L. Viikari, VTT), the Academy of Finland (SV) and the Glycoscience Graduate School (SV).",
author = "Sanni Voutilainen and Harry Boer and Terhi Puranen and Matti Siika-aho and Marika Alapuranen and Liisa Viikari and Jari Vehmaanper{\"a} and Anu Koivula",
year = "2007",
language = "English",
note = "7th Carbohydrate Bioengineering Meeting ; Conference date: 22-04-2007 Through 25-04-2007",

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Voutilainen, S, Boer, H, Puranen, T, Siika-aho, M, Alapuranen, M, Viikari, L, Vehmaanperä, J & Koivula, A 2007, 'Characterisation of wild-type and engineered thermostable cellobiohydrolases from glycosyl hydrolase family 7', Paper presented at 7th Carbohydrate Bioengineering Meeting, Braunschweig, Germany, 22/04/07 - 25/04/07.

Characterisation of wild-type and engineered thermostable cellobiohydrolases from glycosyl hydrolase family 7. / Voutilainen, Sanni; Boer, Harry; Puranen, Terhi; Siika-aho, Matti; Alapuranen, Marika; Viikari, Liisa; Vehmaanperä, Jari; Koivula, Anu.

2007. Paper presented at 7th Carbohydrate Bioengineering Meeting, Braunschweig, Germany.

Research output: Contribution to conferenceConference articleScientific

TY - CONF

T1 - Characterisation of wild-type and engineered thermostable cellobiohydrolases from glycosyl hydrolase family 7

AU - Voutilainen, Sanni

AU - Boer, Harry

AU - Puranen, Terhi

AU - Siika-aho, Matti

AU - Alapuranen, Marika

AU - Viikari, Liisa

AU - Vehmaanperä, Jari

AU - Koivula, Anu

PY - 2007

Y1 - 2007

N2 - Cellulases are important industrial enzymes, which can be used e.g. in the pulp and paper, textile, and detergent industry, as well as for the conversion of cellulosic biomass to ethanol, a transport fuel. Thermostable enzymes are needed in many of these applications. Thermophilic organisms are a potential source for thermostable enzymes for industrial applications. As an alternative, the thermostability of an enzyme can be improved by structure-based rational mutagenesis or directed evolution methods. Here, we present the characterisation of the enzymatic properties of four novel thermostable cellobiohydrolases originating from the thermophililic fungi Acremonium thermophilum, Chaetomium thermophilum, Melanocarpus albomyces and Thermoascus aurantiacus. These GH-7 family enzymes were expressed in the industrially relevant production host Trichoderma reesei, and the kinetics on small soluble substrates, cellobiose inhibition, crystalline cellulose hydrolysis and thermostability of the purified enzymes were determined. Enzymatic properties of these cellobiohydrolases were compared to those of the T.reesei cellobiohydrolase Cel7A, one of the most thoroughly studied fungal cellobiohydrolases. In addition, protein engineering of yeast expressed M. albomyces Cel7B was performed leading to a further improvement of its thermostability. Acknowledgements: This work has been supported by grants from the EU (“Technological improvement for ethanol production from lignocellulose” project; coordinator L. Viikari, VTT), the Academy of Finland (SV) and the Glycoscience Graduate School (SV).

AB - Cellulases are important industrial enzymes, which can be used e.g. in the pulp and paper, textile, and detergent industry, as well as for the conversion of cellulosic biomass to ethanol, a transport fuel. Thermostable enzymes are needed in many of these applications. Thermophilic organisms are a potential source for thermostable enzymes for industrial applications. As an alternative, the thermostability of an enzyme can be improved by structure-based rational mutagenesis or directed evolution methods. Here, we present the characterisation of the enzymatic properties of four novel thermostable cellobiohydrolases originating from the thermophililic fungi Acremonium thermophilum, Chaetomium thermophilum, Melanocarpus albomyces and Thermoascus aurantiacus. These GH-7 family enzymes were expressed in the industrially relevant production host Trichoderma reesei, and the kinetics on small soluble substrates, cellobiose inhibition, crystalline cellulose hydrolysis and thermostability of the purified enzymes were determined. Enzymatic properties of these cellobiohydrolases were compared to those of the T.reesei cellobiohydrolase Cel7A, one of the most thoroughly studied fungal cellobiohydrolases. In addition, protein engineering of yeast expressed M. albomyces Cel7B was performed leading to a further improvement of its thermostability. Acknowledgements: This work has been supported by grants from the EU (“Technological improvement for ethanol production from lignocellulose” project; coordinator L. Viikari, VTT), the Academy of Finland (SV) and the Glycoscience Graduate School (SV).

M3 - Conference article

ER -

Voutilainen S, Boer H, Puranen T, Siika-aho M, Alapuranen M, Viikari L et al. Characterisation of wild-type and engineered thermostable cellobiohydrolases from glycosyl hydrolase family 7. 2007. Paper presented at 7th Carbohydrate Bioengineering Meeting, Braunschweig, Germany.