2018
DOI: 10.1186/s13568-018-0576-5
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Effect of CBM1 and linker region on enzymatic properties of a novel thermostable dimeric GH10 xylanase (Xyn10A) from filamentous fungus Aspergillus fumigatus Z5

Abstract: Xylanase with a high thermostability will satisfy the needs of raising the temperature of hydrolysis to improve the rheology of the broth in industry of biomass conversion. In this study, a xylanase gene (xyn10A), predicted to encode a hydrolase domain of GH10, a linker region and a CBM1 domain, was cloned from a superior lignocellulose degrading strain Aspergillus fumigatus Z5 and successfully expressed in Pichia pastoris X33. Xyn10A has a specific xylanase activity of 34.4 U mg−1, and is optimally active at … Show more

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Cited by 16 publications
(10 citation statements)
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“…3d), and SSF9.0 indeed had the lowest values, but the differences (79% and 67% for SSF3.0 and SSF6.0, respectively) are not enough to completely support the hypothesis that a low amount of secreted enzymes led to an inefficient destruction of rice straw in SSF9.0. Therefore, it was hypothesized that the ambient pH of SSF9.0 was another main reason that largely inhibited all enzyme activities, as it is well known that most secreted cellulases and hemicellulases can only maintain approximately 20% of enzyme activity at pH 9.0 [20][21][22]. The crude enzymes of NJAU4742 strain induced by rice straw were detected to only have 19.13 ± 0.31% of xylanase activity and 1.12 ± 0.07% endoglucanase activity at pH 9.0 when compared to pH 5.0.…”
Section: The Performance Of Njau4742 Strain Under Solid-state Fermentmentioning
confidence: 99%
“…3d), and SSF9.0 indeed had the lowest values, but the differences (79% and 67% for SSF3.0 and SSF6.0, respectively) are not enough to completely support the hypothesis that a low amount of secreted enzymes led to an inefficient destruction of rice straw in SSF9.0. Therefore, it was hypothesized that the ambient pH of SSF9.0 was another main reason that largely inhibited all enzyme activities, as it is well known that most secreted cellulases and hemicellulases can only maintain approximately 20% of enzyme activity at pH 9.0 [20][21][22]. The crude enzymes of NJAU4742 strain induced by rice straw were detected to only have 19.13 ± 0.31% of xylanase activity and 1.12 ± 0.07% endoglucanase activity at pH 9.0 when compared to pH 5.0.…”
Section: The Performance Of Njau4742 Strain Under Solid-state Fermentmentioning
confidence: 99%
“…Na natureza, a degradação da biomassa vegetal é conduzida por uma extensa comunidade de microrganismos capazes de secretar arsenais de CAZymes que atuam em sinergia e com complementariedade, desempenhando assim um papel essencial na reciclagem do carbono (OGUNYEWO et al, 2020;BERNARDES et al, 2019;WAHAB et al, 2019;BORIN et al, 2017;CRAGG et al, 2015;van den BRINK & de VRIES, 2011;ARO et al, 2005). Dentre esses, os fungos filamentosos se destacam como os mais eficientes degradadores devido à secreção de misturas enzimáticas completas (celulases, hemicelulases, pectinases e ligninases) em grandes quantidades e altamente específicas para os substratos com que se deparam, e pelo seu modo de crescimento hifal, que permite uma colonização mais eficiente do substrato (MIAO et al, 2018(MIAO et al, , 2015CULLETON et al, 2013;COUTINHO et al, 2009).…”
Section: Bioprospecção De Novas Enzimas Hidrolíticasunclassified
“…Dadas as inúmeras vantagens de se realizar processos industriais em temperaturas acima de 50 ºC, a termoestabilidade é uma das propriedades enzimáticas mais desejáveis para aplicações biotecnológicas (MIAO et al, 2018;CHAHED et al, 2018;MOROZ et al, 2015).…”
Section: Ensaios De Estabilidade a Diferentes Temperaturas E Phunclassified
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