Chrysoporthe cubensis: A new source of cellulases and hemicellulases to application in biomass saccharification processes

Falkoski, Daniel Luciano; Guimarães, Valéria Monteze; Almeida, Maíra Nicolau de; Alfenas, Acelino C.; Colodette, Jorge Luiz; Rezende, Sebastião Tavares de

doi:10.1016/j.biortech.2012.11.140

Cited by 90 publications

(50 citation statements)

References 32 publications

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“…Considerando que a casca de arroz não passou por nenhum tipo de pré-tatamento, esse maior rendimento de glicose pode ser atribuído possivelmente ao pó de arroz que está junto com a casca de arroz e que por sua vez pode conter açúcares que podem ter sido hidrolisados pelas enzimas presentes no extrato enzimático. Segundo Falkoski et al (2013) a biomassa lignocelulósica não pode ser sacarificada por enzimas com rendimentos elevados sem um processo de pré-tratamento, isso porque, a lignina e a hemicelulose presentes na parede da célula vegetal formam um obstáculo para a ação de enzimas.…”

Section: Resultsunclassified

SACARIFICAÇÃO DE DIFERENTES RESÍDUOS AGROINDUSTRIAIS PELO EXTRATO ENZIMÁTICO BRUTO PRODUZIDO POR Trichoderma reesei NRRL 3652 EM CASCA DE SOJA

Astolfi¹,

Astolfi²,

Bustamante³

et al. 2015

Anais Do Congresso Brasileiro De Engenharia Química Em Iniciação Científica - Cobeq IC 2015

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RESUMO -Atualmente tem se buscado esforços para o desenvolvimento e a implementação de tecnologias para produção de etanol celulósico a partir de resíduos agrícolas com baixo valor agregado, como bagaço de cana, casca de soja, resíduos de madeira, palha de arroz, palha de trigo, entre outros. A biomassa vegetal é constituída principalmente de celulose, hemicelulose e lignina, sendo a celulose o polímero mais abundante. A hidrólise enzimática é um importante passo para a bioconversão da fração celulósica e hemicelulósica de resíduos lignocelulósicos em açúcares fermentescíveis. Neste estudo, o objetivo foi investigar a sacarificação de casca de soja, bagaço de cana e casca de arroz, utilizando-se o extrato enzimático bruto obtido da fermentação em estado sólido de T. reesei NRRL 3652 em casca de soja, com finalidade da obtenção de açúcares fermentescíveis. Obteve-se maior rendimento de glicose com casca de arroz, no entanto é importante destacar que para que a sacarificação da biomassa lignocelulósica apresente elevados rendimentos, faz-se necessário a realização de processos de pré-tratamento, isto porque a lignina e hemicelulose presente na parede da célula vegetal formam uma barreira para ação enzimática.

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Section: Resultsunclassified

SACARIFICAÇÃO DE DIFERENTES RESÍDUOS AGROINDUSTRIAIS PELO EXTRATO ENZIMÁTICO BRUTO PRODUZIDO POR Trichoderma reesei NRRL 3652 EM CASCA DE SOJA

Astolfi¹,

Astolfi²,

Bustamante³

et al. 2015

Anais Do Congresso Brasileiro De Engenharia Química Em Iniciação Científica - Cobeq IC 2015

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“…Moreover, physical and nutritional factors may also account for reported differences in enzyme expression and expression levels. Enzymes from Aspergilli are mostly reported to exhibit low total cellulase activity (Falkoski et al 2013); however, their high β-glucosidase expressing levels have made them relevant game changers for industrial applications. One remarkable property of the species in the genus is their tolerance against osmotic gradients.…”

Section: Fungi Sourcesmentioning

confidence: 99%

Lignocellulases: a review of emerging and developing enzymes, systems, and practices

Obeng

Adam

Budiman

et al. 2017

Bioresour. Bioprocess.

127

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The highly acclaimed prospect of renewable lignocellulosic biocommodities as obvious replacement of their fossilbased counterparts is burgeoning within the last few years. However, the use of the abundant lignocellulosic biomass provided by nature to produce value-added products, especially bioethanol, still faces significant challenges. One of the crucial challenging factors is in association with the expression levels, stability, and cost-effectiveness of the cellulose-degrading enzymes (cellulases). Interestingly, several recommendable endeavors in the bid to curb these challenges are in pursuance. However, the existing body of literature has not well provided the updated roadmap of the advancement and key players spearheading the current success. Moreover, the description of enzyme systems and emerging paradigms with high prospects, for example, the cell-surface display system has been ill-captured in the literature. This review focuses on the lignocellulosic biocommodity pathway, with emphasis on cellulase and hemicellulase systems. The paradigm shift towards cell-surface display system and its emerging recommendable developments have also been discussed. The attempts in supplementing cellulase with other enzymes, accessory proteins, and chemical additives have also been discussed. Moreover, some of the prominent and influential discoveries in the cellulase fraternity have been discussed.

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“…A set of lignolytic enzymes, namely, laccases (EC 1. 10.3.2), manganese peroxidases (EC 1.11.1.3), lignin peroxidases (EC 1.11.1.4), versatile peroxidases (EC 1.11.1. 16), and other accessory enzymes (aryl alcohol oxidase, glyoxal oxidase, etc.)…”

Section: ■ Introductionmentioning

confidence: 99%

Rice Straw Based Evaluation of Lignolytic and Cellulolytic Capabilities of Novel Strains of Saprophytic Fungi from Indo-Burma Biodiversity Hotspot

et al. 2015

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Superior lignocellulolytic microbes are useful for efficient bioconversion of plant biomass. Eight fungal strains were isolated from compost and forest litter of an Indo-Burma Biodiversity hotspot and were evaluated for their lignolytic and cellulolytic capabilities. X-ray diffraction (XRD) study was performed to test their effect on cellulose crystallinity of rice straw. Scanning electron spectroscopic (SEM) and Fourier transform-infrared (FT-IR) spectroscopic analysis were performed to study the surface morphology and chemical changes occurred in the fungi treated rice straw, respectively. The fungus Fusarium equiseti strain TWRF-10 showed endoglucanase, exoglucanase, and endoxylanase activity of 99.19, 87.39, and 166.81 IU g −1 rice straw, respectively, whereas Penicillium simplicissimum strain TRF-27 showed laccase and Mn peroxidase activity of 248.53 and 168.5 IU g −1 rice straw, respectively. The strain TRF-27 caused a 65% reduction in cellulose crystallinity. These strains should be further tested for industrial use.

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Chrysoporthe cubensis: A new source of cellulases and hemicellulases to application in biomass saccharification processes

Cited by 90 publications

References 32 publications

SACARIFICAÇÃO DE DIFERENTES RESÍDUOS AGROINDUSTRIAIS PELO EXTRATO ENZIMÁTICO BRUTO PRODUZIDO POR Trichoderma reesei NRRL 3652 EM CASCA DE SOJA

SACARIFICAÇÃO DE DIFERENTES RESÍDUOS AGROINDUSTRIAIS PELO EXTRATO ENZIMÁTICO BRUTO PRODUZIDO POR Trichoderma reesei NRRL 3652 EM CASCA DE SOJA

Lignocellulases: a review of emerging and developing enzymes, systems, and practices

Rice Straw Based Evaluation of Lignolytic and Cellulolytic Capabilities of Novel Strains of Saprophytic Fungi from Indo-Burma Biodiversity Hotspot

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