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Isolation and Analysis of the Enzymatic Properties of Thermophilic Fungi from Compost
Lee, Hanbyul,Lee, Young Min,Jang, Yeongseon,Lee, Sangjoon,Lee, Hwanhwi,Ahn, Byoung Jun,Kim, Gyu-Hyeok,Kim, Jae-Jin The Korean Society of Mycology 2014 Mycobiology Vol.42 No.2
To the best of our knowledge, this is the first report on thermophilic fungi isolated in Korea. Three species of thermophiles were isolated from compost and were identified as Myriococcum thermophilum, Thermoascus aurantiacus, and Thermomyces lanuginosus. They can grow at temperatures above $50^{\circ}C$ and produce high levels of cellulolytic and xylanolytic enzymes at high temperatures. Notably, the considerable thermostability of the endo-glucanase produced by T. aurantiacus has made the fungus an attractive source of industrial enzymes.
( Hanbyul Lee ),( Young Min Lee ),( Young Mok Heo ),( Joo-hyun Hong ),( Seokyoon Jang ),( Byoung Jun Ahn ),( Sung-suk Lee ),( Jae-jin Kim ) 한국균학회 2017 Mycobiology Vol.45 No.1
The morphological optimization of Trichoderma harzianum was carried out using several surfactants to achieve increased cellulase production. Addition of the surfactants to the culture medium successfully modified the fungal morphology from an aggregated form to a dispersed form. Optimization of the fungal morphology increased cellulase activity up to 177%. The morphologically optimized conditions enhanced the accessibility of the fungus to substrates and thus promoted cellulase production.
( Hanbyul Lee ),( Young Min Lee ),( Yeongseon Jang ),( Sangjoon Lee ),( Hwanhwi Lee ),( Byoung Jun Ahn ),( Gyu Hyeok Kim ),( Jae Jin Kim ) 한국균학회 2014 韓國菌學會誌 Vol.42 No.2
To the best of our knowledge, this is the first report on thermophilic fungi isolated in Korea. Three species of thermophiles were isolated from compost and were identified as Myriococcum thermophilum, Thermoascus aurantiacus, and Thermomyces lanuginosus. They can grow at temperatures above 50oC and produce high levels of cellulolytic and xylanolytic enzymes at high temperatures. Notably, the considerable thermostability of the endo-glucanase produced by T. aurantiacus has made the fungus an attractive source of industrial enzymes.
Evaluation of Cellulolytic Enzyme Production by Indigenous Fungi in Korea
Hanbyul Lee,Young Min Lee,Young Mok Heo,Jaejung Lee,Jae-Jin Kim 한국환경생물학회 2017 환경생물 : 환경생물학회지 Vol.35 No.4
The aim of this study was to select various fungal strains indigenous to Korea that have the potential to produce cellulases, including filter paper activity (FPase), endo-β-1,4-glucanase (EG), and β-glucosidase (BGL). Among the 25 species of Ascomycetes and the 32 species of Basidiomycetes tested in this study, the Bjerkandera adusta KUC10565, Heterobasidion orientale KUC10556, Hyphoderma praetermissum KUC10609, and Trichoderma harzianum KUC1716 all exhibited remarkably high FPase activity. In addition, the T. harzianum KUC1716 showed high levels of EG and BGL activity. This strain has been selected for further study because of their enzymatic potential.
Evaluation of Cellulolytic Enzyme Production by Indigenous Fungi in Korea
Lee, Hanbyul,Lee, Young Min,Heo, Young Mok,Lee, Jaejung,Kim, Jae-Jin Korean Society of Environmental Biology 2017 환경생물 : 환경생물학회지 Vol.35 No.4
The aim of this study was to select various fungal strains indigenous to Korea that have the potential to produce cellulases, including filter paper activity (FPase), $endo-{\beta}$-1,4-glucanase (EG), and ${\beta}-glucosidase$ (BGL). Among the 25 species of Ascomycetes and the 32 species of Basidiomycetes tested in this study, the Bjerkandera adusta KUC10565, Heterobasidion orientale KUC10556, Hyphoderma praetermissum KUC10609, and Trichoderma harzianum KUC1716 all exhibited remarkably high FPase activity. In addition, the T. harzianum KUC1716 showed high levels of EG and BGL activity. This strain has been selected for further study because of their enzymatic potential.
Lee, Hanbyul,Lee, Young Min,Heo, Young Mok,Lee, Jaejung,Kim, Jun Seok,Kang, Kyu Young,Kim, Jae-Jin Elsevier 2017 INDUSTRIAL CROPS AND PRODUCTS Vol.109 No.-
<P><B>Abstract</B></P> <P>Agricultural residues are a potentially economical and eco-friendly source for second-generation ethanol production. In the present study, efficient cellulolytic enzyme production was studied using agricultural residues as a carbon source. Four types of agricultural residues were evaluated as carbon sources for <I>Trichoderma harzianum</I> KUC1716. Barley straw was identified as the optimal carbon source for the fungus such that the highest enzyme activity occurred in these cultures compared to cultures that used empty fruit bunches (EFB), miscanthus, or rice straw sources. <I>T. harzianum</I> KUC1716 produced high levels of filter paperase (FPase) and cellobiohydrolase (CBH) under optimized medium conditions when a central composite design and response surface methodology were used. Furthermore, <I>T. harzianum</I> KUC1716 fungal enzymes exhibited a significant hydrolysis yield for various types of agricultural residues compared to a commercial enzyme. Our study demonstrates that utilization of agricultural residues for both enzyme production and enzymatic saccharification will contribute to an increase in economical and eco-friendly production of biofuels and bio-based products.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Barley straw was an effective inducer for cellulolytic enzymes production by <I>Trichoderma hazianum</I>. </LI> <LI> The statistical optimization of medium components enhanced cellulolytic enzymes production. </LI> <LI> The fungal enzymes effectively hydrolyzed various types of agricultural residues. </LI> <LI> The fungal enzymes exhibited a significant hydrolysis yield compared to a commercial enzyme. </LI> </UL> </P>