Comparison of Trichoderma longibrachiatum Xyloglucanase Production Using Tamarind (Tamarindus indica) and Jatoba (Hymenaea courbaril) Seeds: Factorial Design and Immobilization on Ionic Supports

Author(s)

Contato, Alex Graca ; Vici, Ana Claudia ; Pinheiro, Vanessa Elisa ; de Oliveira, Tassio Brito ; de Freitas, Emanuelle Neiverth ; Aranha, Guilherme Mauro ; Aparecido Valvassora Junior, Almir Luiz ; Vargas Rechia, Carem Gledes ; Buckeridge, Marcos Silveira ; Teixeira de Moraes Polizeli, Maria de Lourdes

• Document type: Journal article
• Source: FERMENTATION-BASEL; v. 8, n. 10, p. 12-pg., 2022-10-01.

Abstract

Xyloglucan (XG) is the predominant hemicellulose in the primary cell wall of superior plants. It has a fundamental role in controlling the stretching and expansion of the plant cell wall. There are five types of enzymes known to cleave the linear chain of xyloglucan, and the most well-known is xyloglucanase (XEG). The immobilization process can be used to solve problems related to stability, besides the economic benefits brought by the possibility of its repeated use and recovery. Therefore, this study aims at the optimization of the xyloglucanase production of Trichoderma longibrachiatum using a central composite rotatable design (CCRD) with tamarind and jatoba seeds as carbon sources, as well as XEG immobilization on ionic supports, such as MANAE (monoamine-N-aminoethyl), DEAE (diethylaminoethyl)-cellulose, CM (carboxymethyl)-cellulose, and PEI (polyethyleneimine). High concentrations of carbon sources (1.705%), at a temperature of 30 degrees C and under agitation for 72 h, were the most favorable conditions for the XEG activity from T. longibrachiatum with respect to both carbon sources. However, the tamarind seeds showed 23.5% higher activity compared to the jatoba seeds. Therefore, this carbon source was chosen to continue the experiments. The scaling up from Erlenmeyer flasks to the bioreactor increased the XEG activity 1.27-fold (1.040 +/- 0.088 U/mL). Regarding the biochemical characterization of the crude extract, the optimal temperature range was 50-55 degrees C, and the optimal pH was 5.0. Regarding the stabilities with respect to pH and temperature, XEG was not stable for prolonged periods, which was crucial to immobilizing it on ionic resins. XEG showed the best immobilization efficiency on CM-cellulose and DEAE-cellulose, with activities of 1.16 and 0.89 U/g of the derivative (enzyme plus support), respectively. This study describes, for the first time in the literature, the immobilization of a fungal xyloglucanase using these supports. (AU)

• FAPESP's process: 14/50884-5 - INCT 2014: National Institute of Science and Technology of Bioethanol
• Grantee: Marcos Silveira Buckeridge
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/25862-6 - Structural studies and functional properties of xyloglucanases and lichenases: applications on hydrolysis of lignocellulosic biomass
• Grantee: Alex Graça Contato
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 18/07522-6 - Development of eco-friendly technologies for the hydrolysis of biomass and residues of cellulose pulp and paper industry
• Grantee: Maria de Lourdes Teixeira de Moraes Polizeli
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/09000-4 - Effects of temperature and water stress, in climate change scenario, on the fungal community in tropical soil and selection of nitrous oxide producing strains
• Grantee: Tássio Brito de Oliveira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 17/23989-9 - Lignocellulosic biomass of Panicum maximum Jacq. forage grass produced in simulated future climate conditions: potential source of fermentable sugars for bioenergy
• Grantee: Emanuelle Neiverth de Freitas
• Support Opportunities: Scholarships in Brazil - Doctorate