Metagenomic exploration of cold-active enzymes for detergent applications: Characterization of a novel, cold-active and alkali-stable GH8 endoglucanase from ikaite columns in SW Greenland.


Journal

Microbial biotechnology
ISSN: 1751-7915
Titre abrégé: Microb Biotechnol
Pays: United States
ID NLM: 101316335

Informations de publication

Date de publication:
Jun 2024
Historique:
revised: 12 03 2024
received: 26 01 2024
accepted: 20 03 2024
medline: 3 6 2024
pubmed: 3 6 2024
entrez: 3 6 2024
Statut: ppublish

Résumé

Microbial communities from extreme environments are largely understudied, but are essential as producers of metabolites, including enzymes, for industrial processes. As cultivation of most microorganisms remains a challenge, culture-independent approaches for enzyme discovery in the form of metagenomics to analyse the genetic potential of a community are rapidly becoming the way forward. This study focused on analysing a metagenome from the cold and alkaline ikaite columns in Greenland, identifying 282 open reading frames (ORFs) that encoded putative carbohydrate-modifying enzymes with potential applications in, for example detergents and other processes where activity at low temperature and high pH is desired. Seventeen selected ORFs, representing eight enzyme families were synthesized and expressed in two host organisms, Escherichia coli and Aliivibrio wodanis. Aliivibrio wodanis demonstrated expression of a more diverse range of enzyme classes compared to E. coli, emphasizing the importance of alternative expression systems for enzymes from extremophilic microorganisms. To demonstrate the validity of the screening strategy, we chose a recombinantly expressed cellulolytic enzyme from the metagenome for further characterization. The enzyme, Cel240, exhibited close to 40% of its relative activity at low temperatures (4°C) and demonstrated endoglucanase characteristics, with a preference for cellulose substrates. Despite low sequence similarity with known enzymes, computational analysis and structural modelling confirmed its cellulase-family affiliation. Cel240 displayed activity at low temperatures and good stability at 25°C, activity at alkaline pH and increased activity in the presence of CaCl

Identifiants

pubmed: 38829370
doi: 10.1111/1751-7915.14466
doi:

Substances chimiques

Detergents 0
Cellulase EC 3.2.1.4
Recombinant Proteins 0

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

e14466

Subventions

Organisme : Danmarks Frie Forskningsfond
ID : 0217-00052B
Organisme : Fundação de Amparo à Pesquisa do Estado de São Paulo
ID : 2019/06663-8
Organisme : Fundação de Amparo à Pesquisa do Estado de São Paulo
ID : 2022/01756-0
Organisme : Novo Nordisk Fonden
ID : NNFSA170028392

Informations de copyright

© 2024 The Authors. Microbial Biotechnology published by John Wiley & Sons Ltd.

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Auteurs

Bianca Oliva (B)

Section for Protein Chemistry and Enzyme Technology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark.

Athanasios Zervas (A)

Section for Environmental Microbiology, Department of Environmental Science, Aarhus University, Roskilde, Denmark.

Peter Stougaard (P)

Section for Environmental Microbiology, Department of Environmental Science, Aarhus University, Roskilde, Denmark.

Peter Westh (P)

Section for Protein Chemistry and Enzyme Technology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark.

Mariane Schmidt Thøgersen (MS)

Section for Environmental Microbiology, Department of Environmental Science, Aarhus University, Roskilde, Denmark.

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