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Identification and characterization of novel cellulolytic and hemicellulolytic genes and enzymes derived from German grassland soil metagenomes
Soil metagenomes represent an unlimited resource for the discovery of novel biocatalysts from soil microorganisms. Three large-inserts metagenomic DNA libraries were constructed from different grassland soil samples and screened for genes conferring cellulase or xylanase activity. Function-driven sc...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Netherlands
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3298741/ https://www.ncbi.nlm.nih.gov/pubmed/22187078 http://dx.doi.org/10.1007/s10529-011-0830-2 |
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author | Nacke, Heiko Engelhaupt, Martin Brady, Silja Fischer, Christiane Tautzt, Janine Daniel, Rolf |
author_facet | Nacke, Heiko Engelhaupt, Martin Brady, Silja Fischer, Christiane Tautzt, Janine Daniel, Rolf |
author_sort | Nacke, Heiko |
collection | PubMed |
description | Soil metagenomes represent an unlimited resource for the discovery of novel biocatalysts from soil microorganisms. Three large-inserts metagenomic DNA libraries were constructed from different grassland soil samples and screened for genes conferring cellulase or xylanase activity. Function-driven screening identified a novel cellulase-encoding gene (cel01) and two xylanase-encoding genes (xyn01 and xyn02). From sequence and protein domain analyses, Cel01 (831 amino acids) belongs to glycoside hydrolase family 9 whereas Xyn01 (170 amino acids) and Xyn02 (255 amino acids) are members of glycoside hydrolase family 11. Cel01 harbors a family 9 carbohydrate-binding module, previously found only in xylanases. Both Xyn01 and Xyn02 were most active at 60°C with high activities from 4 to 10 and optimal at pH 7 (Xyn01) and pH 6 (Xyn02). The cellulase gene, cel01, was expressed in E. coli BL21 and the recombinant enzyme (91.9 kDa) was purified. Cel01 exhibited high activity with soluble cellulose substrates containing β-1,4-linkages. Activity with microcrystalline cellulose was not detected. These data, together with the analysis of the degradation profiles of carboxymethyl cellulose and barley glucan indicated that Cel01 is an endo 1,4-β-glucanase. Cel01 showed optimal activity at 50°C and pH 7 being highly active from pH range 5 to 9 and possesses remarkable halotolerance. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10529-011-0830-2) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-3298741 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Springer Netherlands |
record_format | MEDLINE/PubMed |
spelling | pubmed-32987412012-03-21 Identification and characterization of novel cellulolytic and hemicellulolytic genes and enzymes derived from German grassland soil metagenomes Nacke, Heiko Engelhaupt, Martin Brady, Silja Fischer, Christiane Tautzt, Janine Daniel, Rolf Biotechnol Lett Original Research Paper Soil metagenomes represent an unlimited resource for the discovery of novel biocatalysts from soil microorganisms. Three large-inserts metagenomic DNA libraries were constructed from different grassland soil samples and screened for genes conferring cellulase or xylanase activity. Function-driven screening identified a novel cellulase-encoding gene (cel01) and two xylanase-encoding genes (xyn01 and xyn02). From sequence and protein domain analyses, Cel01 (831 amino acids) belongs to glycoside hydrolase family 9 whereas Xyn01 (170 amino acids) and Xyn02 (255 amino acids) are members of glycoside hydrolase family 11. Cel01 harbors a family 9 carbohydrate-binding module, previously found only in xylanases. Both Xyn01 and Xyn02 were most active at 60°C with high activities from 4 to 10 and optimal at pH 7 (Xyn01) and pH 6 (Xyn02). The cellulase gene, cel01, was expressed in E. coli BL21 and the recombinant enzyme (91.9 kDa) was purified. Cel01 exhibited high activity with soluble cellulose substrates containing β-1,4-linkages. Activity with microcrystalline cellulose was not detected. These data, together with the analysis of the degradation profiles of carboxymethyl cellulose and barley glucan indicated that Cel01 is an endo 1,4-β-glucanase. Cel01 showed optimal activity at 50°C and pH 7 being highly active from pH range 5 to 9 and possesses remarkable halotolerance. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10529-011-0830-2) contains supplementary material, which is available to authorized users. Springer Netherlands 2011-12-21 2012 /pmc/articles/PMC3298741/ /pubmed/22187078 http://dx.doi.org/10.1007/s10529-011-0830-2 Text en © The Author(s) 2011 https://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. |
spellingShingle | Original Research Paper Nacke, Heiko Engelhaupt, Martin Brady, Silja Fischer, Christiane Tautzt, Janine Daniel, Rolf Identification and characterization of novel cellulolytic and hemicellulolytic genes and enzymes derived from German grassland soil metagenomes |
title | Identification and characterization of novel cellulolytic and hemicellulolytic genes and enzymes derived from German grassland soil metagenomes |
title_full | Identification and characterization of novel cellulolytic and hemicellulolytic genes and enzymes derived from German grassland soil metagenomes |
title_fullStr | Identification and characterization of novel cellulolytic and hemicellulolytic genes and enzymes derived from German grassland soil metagenomes |
title_full_unstemmed | Identification and characterization of novel cellulolytic and hemicellulolytic genes and enzymes derived from German grassland soil metagenomes |
title_short | Identification and characterization of novel cellulolytic and hemicellulolytic genes and enzymes derived from German grassland soil metagenomes |
title_sort | identification and characterization of novel cellulolytic and hemicellulolytic genes and enzymes derived from german grassland soil metagenomes |
topic | Original Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3298741/ https://www.ncbi.nlm.nih.gov/pubmed/22187078 http://dx.doi.org/10.1007/s10529-011-0830-2 |
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