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da Silva Almeida LE, de Assis SA. Application of Immobilized β-Glucosidase from Candida boidinii in the Hydrolysis of Delignified Sugarcane Bagasse. Indian J Microbiol 2024; 64:650-670. [PMID: 39010988 PMCID: PMC11246346 DOI: 10.1007/s12088-024-01223-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 02/07/2024] [Indexed: 07/17/2024] Open
Abstract
Candida boidinii is a methylotrophic yeast with wide geographical distribution. In the present study, the microorganism was isolated from the Bahian semiarid and the enzymatic extract containing β-glucosidase was obtained through submerged fermentation. Response surface methodology was employed to optimize of fermentation medium. The higher production of β-glucosidase was obtained after 71 h of fermentation in an optimized medium composed of 3.35% glucose, 1.78% yeast extract and 1% peptone. The optimum pH and temperature of enzymatic activity were 6.8 (citrate-phosphate buffer) and 71.7 °C, respectively. Salts tested (10 mM) CaCl2, Na2SO4 and ZnSO4 promotes the increase of 91%, 45% and 80% of activity, respectively. The enzyme retained 64% ± 2.3 of its initial activity after 1 h heating at 90 °C. The production of reducing sugars was 95.94% after 24 h of hydrolysis and, with the addition of metal ions, this value increased more than 2 times. Among the supports analyzed for immobilization, chitosan showed higher residual activity during reuse. The immobilized enzyme showed higher activity at 60 °C with pH 6 and preserved almost 100% of the initial activity after 30 min at 70 °C.
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Affiliation(s)
- Larissa Emanuelle da Silva Almeida
- Enzymology and Fermentation Technology Laboratory, Health Department, State University of Feira de Santana, Transnordestina Ave., km 0, BR 116, Feira de Santana, Bahia 44036-900 Brazil
| | - Sandra Aparecida de Assis
- Enzymology and Fermentation Technology Laboratory, Health Department, State University of Feira de Santana, Transnordestina Ave., km 0, BR 116, Feira de Santana, Bahia 44036-900 Brazil
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Tavares MP, Morgan T, Gomes RF, Mendes JPR, Castro-Borges W, Maitan-Alfenas GP, Guimarães VM. Comparative analysis of Chrysoporthe cubensis exoproteomes and their specificity for saccharification of sugarcane bagasse. Enzyme Microb Technol 2024; 173:110365. [PMID: 38043248 DOI: 10.1016/j.enzmictec.2023.110365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/18/2023] [Accepted: 11/20/2023] [Indexed: 12/05/2023]
Abstract
The phytopathogenic fungus Chrysoporthe cubensis is a relevant source of lignocellulolytic enzymes. This work aimed to compare the profile of lignocellulose-degrading proteins secreted by C. cubensis grown under semi-solid state fermentation using wheat bran (WB) and sugarcane bagasse (SB). The exoproteomes of the fungus grown in wheat bran (WBE) and sugarcane bagasse (SBE) were qualitative and quantitatively analyzed by liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS). Data are available via ProteomeXchange with identifier PXD046075. Label-free proteomic analysis of WBE and SBE showed that the fungus produced a spectrum of carbohydrate-active enzymes (CAZymes) with exclusive characteristics from each extract. While SBE resulted in an enzymatic profile directed towards the depolymerization of cellulose, the enzymes in WBE were more adaptable to the degradation of biomass rich in hemicellulose and other non-lignocellulosic polymers. Saccharification of alkaline pre-treated sugarcane bagasse with SBE promoted glucose release higher than commercial cocktails (8.11 g L-1), while WBE promoted the higher release of xylose (5.71 g L-1). Our results allowed an in-depth knowledge of the complex set of enzymes secreted by C. cubensis responsible for its high lignocellulolytic activity and still provided the identification of promising target proteins for biotechnological applications in the context of biorefinery.
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Affiliation(s)
- Murillo Peterlini Tavares
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, 36570-900 Viçosa, MG, Brazil
| | - Túlio Morgan
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, 36570-900 Viçosa, MG, Brazil
| | - Riziane Ferreira Gomes
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, 36570-900 Viçosa, MG, Brazil
| | - Jean Pierre Rocha Mendes
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, 36570-900 Viçosa, MG, Brazil
| | - William Castro-Borges
- Department of Biological Science, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, 35400-000 Ouro Preto, MG, Brasil
| | - Gabriela Piccolo Maitan-Alfenas
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, 36570-900 Viçosa, MG, Brazil
| | - Valéria Monteze Guimarães
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, 36570-900 Viçosa, MG, Brazil.
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Morgan T, Falkoski DL, Tavares MP, Oliveira MB, Guimarães VM, de Oliveira Mendes TA. Penicillium Ochrochloron RLS11 Secretome Containing Carbohydrate-Active Enzymes Improves Commercial Enzyme Mixtures During Sugarcane Straw Saccharification. Appl Biochem Biotechnol 2022; 194:2946-2967. [PMID: 35312974 DOI: 10.1007/s12010-022-03898-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 03/14/2022] [Indexed: 11/29/2022]
Abstract
Filamentous fungi are prolific producers of carbohydrate-active enzymes (CAZymes) and important agents that carry out plant cell wall degradation in natural environments. The number of fungal species is frequently reported in the millions range, with a huge diversity and genetic variability, reflecting on a vast repertoire of CAZymes that these organisms can produce. In this study, we evaluated the ability of previously selected ascomycete and basidiomycete fungi to produce plant cell wall-degrading enzyme (PCWDE) activities and the potential of the culture supernatants to increase the efficiency of the Cellic® CTec2/HTec2 for steam-exploded sugarcane straw saccharification. The culture supernatant of Penicillium ochrochloron RLS11 showed a promising supplementation effect on Cellic® CTec2/HTec2, and we conducted the whole-genome sequencing and proteomic analysis for this fungus. The size of the assembled genome was 38.06 Mbp, and a total of 12,015 protein-coding genes were identified. The repertoire of PCWDE-coding genes was comparatively high among Penicillium spp. and showed an expansion in important cellulases and xylanases families, such as GH3, GH6, GH7, and GH11. The proteomic analysis indicated cellulases that probably enhanced the biomass saccharification performance of the Cellic® CTec2/HTec2, which included enzymes from GH3, GH6, and GH7 families.
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Affiliation(s)
- Túlio Morgan
- Postgraduate Program in Bioinformatics, Federal University of Minas Gerais, Av. Presidente Antônio Carlos, 6627 - Pampulha, Belo Horizonte, Minas Gerais, 31270-901, Brazil. .,Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Av. PH Rolfs, s/n, Viçosa, MG, 36570-900, Brazil.
| | - Daniel Luciano Falkoski
- Novozymes Latin America - R. Prof. Francisco Ribeiro, 683 - Barigui, Araucária, PR, 83707-660, Brazil
| | - Murillo Peterlini Tavares
- Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Av. PH Rolfs, s/n, Viçosa, MG, 36570-900, Brazil
| | - Mariana Bicalho Oliveira
- Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Av. PH Rolfs, s/n, Viçosa, MG, 36570-900, Brazil
| | - Valéria Monteze Guimarães
- Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Av. PH Rolfs, s/n, Viçosa, MG, 36570-900, Brazil
| | - Tiago Antônio de Oliveira Mendes
- Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Av. PH Rolfs, s/n, Viçosa, MG, 36570-900, Brazil.
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Tavares MP, Morgan T, Gomes RF, Rodrigues MQRB, Castro-Borges W, de Rezende ST, de Oliveira Mendes TA, Guimarães VM. Secretomic insight into the biomass hydrolysis potential of the phytopathogenic fungus Chrysoporthe cubensis. J Proteomics 2021; 236:104121. [PMID: 33540065 DOI: 10.1016/j.jprot.2021.104121] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/17/2020] [Accepted: 01/12/2021] [Indexed: 12/13/2022]
Abstract
The phytopathogenic fungus Chrysoporthe cubensis has a great capacity to produce highly efficient enzymes for the hydrolysis of lignocellulosic biomass. The bioinfosecretome of C. cubensis was identified by computational predictions of secreted proteins combined with protein analysis using 1D-LC-MS/MS. The in silico secretome predicted 562 putative genes capable of encoding secreted proteins, including 273 CAZymes. Proteomics analysis confirmed the existence of 313 proteins, including 137 CAZymes classified as Glycosyl Hydrolases (GH), Polysaccharide Lyases (PL), Carbohydrate Esterases (CE) and Auxiliary Activities enzymes (AA), which indicates the presence of classical and oxidative cellulolytic mechanisms. The enzymes diversity in the extract shows fungal versatility to act in complex biomasses. This study provides an insight into the lignocellulose-degradation mechanisms by C. cubensis and allows the identification of the enzymes that are potentially useful in improving industrial process of bioconversion of lignocellulose. SIGNIFICANCE: Chrysoporthe cubensis is an important deadly canker pathogen of commercially cultivated Eucalyptus species. The effective depolymerisation of the recalcitrant plant cell wall performed by this fungus is closely related to its high potential of lignocellulolytic enzymes secretion. Since the degradation of biomass occurs in nature almost exclusively by enzyme secretion systems, it is reasonable to suggest that the identification of C. cubensis lignocellulolytic enzymes is relevant in contributing to new sustainable alternatives for industrial solutions. As far as we know, this work is the first accurate proteomic evaluation of the enzymes secreted by this species of fungus. The integration of the gel-based proteomic approach, the bioinformatic prediction of the secretome and the analyses of enzymatic activity are powerful tools in the evaluation of biotechnological potential of C. cubensis in producing carbohydrate-active enzymes. In addition, analysis of the C. cubensis secretome grown in wheat bran draws attention to this plant pathogen and its extracellular enzymatic machinery, especially regarding the identification of promising new enzymes for industrial applications. The results from this work allowed for explanation and reinforce previous research that revealed C. cubensis as a strong candidate to produce enzymes to hydrolyse sugarcane bagasse and similar substrates.
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Affiliation(s)
- Murillo Peterlini Tavares
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, Viçosa, MG 36570-900, Brazil
| | - Túlio Morgan
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, Viçosa, MG 36570-900, Brazil
| | - Riziane Ferreira Gomes
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, Viçosa, MG 36570-900, Brazil
| | | | - William Castro-Borges
- Department of Biological Science, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, Ouro Preto, MG 35400-000, Brazil
| | - Sebastião Tavares de Rezende
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, Viçosa, MG 36570-900, Brazil
| | - Tiago Antônio de Oliveira Mendes
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, Viçosa, MG 36570-900, Brazil
| | - Valéria Monteze Guimarães
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Av. PH Rolfs, s/n, Viçosa, MG 36570-900, Brazil.
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da Costa SG, Pereira OL, Teixeira-Ferreira A, Valente RH, de Rezende ST, Guimarães VM, Genta FA. Penicillium citrinum UFV1 β-glucosidases: purification, characterization, and application for biomass saccharification. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:226. [PMID: 30151054 PMCID: PMC6100729 DOI: 10.1186/s13068-018-1226-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 08/11/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND β-Glucosidases are components of the cellulase system, a family of enzymes that hydrolyze the β-1,4 linkages of cellulose. These proteins have been extensively studied due to the possibility of their use in various biotechnological processes. They have different affinities for substrates (depending on their source) and their activities can be used for saccharification of different types of biomass. In this context, the properties and the synergistic capacity of β-glucosidases from different organisms, to supplement the available commercial cellulase cocktails, need a comprehensive evaluation. RESULTS Two β-glucosidases belonging to GH3 family were secreted by Penicillium citrinum UFV. PcβGlu1 (241 kDa) and PcβGlu2 (95 kDa) presented acidic and thermo-tolerant characteristics. PcβGlu1 showed Michaelis-Menten kinetics for all substrates tested with Km values ranging from 0.09 ± 0.01 (laminarin) to 1.7 ± 0.1 mM (cellobiose, C2) and kcat values ranging from 0.143 ± 0.005 (laminarin) to 8.0 ± 0.2 s-1 (laminaribiose, Lb). PcβGlu2 showed substrate inhibition for 4-methylumbelliferyl-β-d-glucopyranoside (MUβGlu), p-nitrophenyl-β-d-glucopyranoside (pNPβGlu), cellodextrins (C3, C4, and C5), N-octil-β-d-glucopyranoside, and laminaribiose, with Km values ranging from 0.014 ± 0.001 (MUβGlu) to 0.64 ± 0.06 mM (C2) and kcat values ranging from 0.49 ± 0.01 (gentiobiose) to 1.5 ± 0.2 s-1 (C4). Inhibition constants (Ki) for PcβGlu2 substrate inhibition ranged from 0.69 ± 0.07 (MUβGlu) to 10 ± 1 mM (Lb). Glucose and cellobiose are competitive inhibitors of PcβGlu1 and PcβGlu2 when pNPβGlu is used as a substrate. For PcβGlu1 inhibition, Ki = 1.89 ± 0.08 mM (glucose) and Ki = 3.8 ± 0.1 mM (cellobiose); for PcβGlu2, Ki = 0.83 ± 0.05 mM (glucose) and Ki = 0.95 ± 0.07 mM (cellobiose). The enzymes were tested for saccharification of different biomasses, individually or supplementing a Trichoderma reesei commercial cellulose preparation. PcβGlu2 was able to hydrolyze banana pseudostem and coconut fiber with the same efficiency as the T. reesei cocktail, showing significant synergistic properties with T. reesei enzymes in the hydrolysis of these alternative biomasses. CONCLUSIONS The β-glucosidases from P. citrinum UFV1 present different enzymatic properties from each other and might have potential application in several biotechnological processes, such as hydrolysis of different types of biomass.
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Affiliation(s)
- Samara G. da Costa
- Laboratory of Enzymatic Technology, Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Viçosa, MG CEP3657000 Brazil
- Laboratory of Insect Biochemistry and Physiology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, Av Brasil 4365, Pav. Leônidas Deane, Room 207, Manguinhos, RJ CEP21040360 Brazil
| | - Olinto Liparini Pereira
- Laboratory of Seed Pathology and Post-Harvest, Department of Phytopathology, Federal University of Viçosa, Viçosa, MG CEP36570-000 Brazil
| | - André Teixeira-Ferreira
- Laboratory of Toxinology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ CEP21040360 Brazil
| | - Richard Hemmi Valente
- Laboratory of Toxinology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ CEP21040360 Brazil
| | - Sebastião T. de Rezende
- Laboratory of Enzymatic Technology, Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Viçosa, MG CEP3657000 Brazil
| | - Valéria M. Guimarães
- Laboratory of Enzymatic Technology, Department of Biochemistry and Molecular Biology, Federal University of Viçosa, Viçosa, MG CEP3657000 Brazil
| | - Fernando Ariel Genta
- Laboratory of Insect Biochemistry and Physiology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, Av Brasil 4365, Pav. Leônidas Deane, Room 207, Manguinhos, RJ CEP21040360 Brazil
- National Institute of Science and Technology for Molecular Entomology, Rio de Janeiro, RJ Brazil
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