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Jia J, Tan Y, Gao J, Han J, Shi P, Fang H, Zhao C. Cloning and expression of Neurospora crassa cellobiohydrolase II in Pichia pastoris. Protein Expr Purif 2024; 216:106416. [PMID: 38104790 DOI: 10.1016/j.pep.2023.106416] [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: 09/14/2023] [Revised: 12/07/2023] [Accepted: 12/09/2023] [Indexed: 12/19/2023]
Abstract
A major cellobiohydrolase of Neurospora crassa CBH2 was successfully expressed in Pichia pastoris. The maximum Avicelase activity in shake flask among seven transformants which selected on 4.0 g/L G418 plates was 0.61 U/mL. The optimal pH and temperature for Avicelase activity of the recombinant CBH2 were determined to be 4.8 and 60 °C, respectively. The new CBH2 maintained 63.5 % Avicelase activity in the range of pH 4.0-10.4, and 60.2 % Avicelase activity in the range of 30-90 °C. After incubation at 70-90 °C for 1 h, the Avicelase activity retained 60.5 % of its initial activity. The presence of Zn2+, Ca2+ or Cd2+ enhanced the Avicelase activity of the CBH2, of which Cd2+ at 10 mM causing the highest increase. The recombinant CBH2 was used to enhance the Avicel hydrolysis by improving the exo-exo-synergism between CBH2 and CBH1 in N.crassa cellulase. The enzymatic hydrolysis yield was increased by 38.1 % by adding recombinant CBH2 and CBH1, and the yield was increased by 215.4 % when the temperature is raised to 70 °C. This work provided a CBH2 with broader pH range and better heat resistance, which is a potential enzyme candidate in food, textile, pulp and paper industries, and other industrial fields.
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Affiliation(s)
- Jingsong Jia
- College of Life Sciences, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China; Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China
| | - Yu Tan
- College of Life Sciences, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China; Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China
| | - Jialun Gao
- College of Life Sciences, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China; Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China
| | - Jingjing Han
- College of Life Sciences, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China; Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China
| | - Peng Shi
- College of Life Sciences, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China
| | - Hao Fang
- College of Life Sciences, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China; Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China; ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, Zhejiang, China
| | - Chen Zhao
- College of Life Sciences, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China; Biomass Energy Center for Arid and Semi-arid Lands, Northwest A&F University, 22 Xinong Road, Yangling, 712100, Shaanxi, China.
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Bernat-Camps N, Ebner K, Schusterbauer V, Fischer JE, Nieto-Taype MA, Valero F, Glieder A, Garcia-Ortega X. Enabling growth-decoupled Komagataella phaffii recombinant protein production based on the methanol-free P DH promoter. Front Bioeng Biotechnol 2023; 11:1130583. [PMID: 37034257 PMCID: PMC10076887 DOI: 10.3389/fbioe.2023.1130583] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 03/01/2023] [Indexed: 04/07/2023] Open
Abstract
The current transition towards the circular bioeconomy requires a rational development of biorefineries to sustainably fulfill the present demands. The use of Komagataella phaffii (Pichia pastoris) can meet this challenge, since it has the capability to use crude glycerol as a carbon-source, a by-product from the biodiesel industry, while producing high- and low-added value products. Recombinant protein production (RPP) using K. phaffii has often been driven either by the methanol induced AOX1 promoter (PAOX1) and/or the constitutive GAP promoter (PGAP). In the last years, strong efforts have been focused on developing novel expression systems that expand the toolbox variety of K. phaffii to efficiently produce diverse proteins that requires different strategies. In this work, a study was conducted towards the development of methanol-free expression system based on a heat-shock gene promoter (PDH) using glycerol as sole carbon source. Using this promoter, the recombinant expression is strongly induced in carbon-starving conditions. The classical PGAP was used as a benchmark, taking for both strains the lipase B from Candida antarctica (CalB) as model protein. Titer of CalB expressed under PDH outperformed PGAP controlled expression in shake-flask cultivations when using a slow-release continuous feeding technology, confirming that PDH is induced under pseudo-starving conditions. This increase was also confirmed in fed-batch cultivations. Several optimization rounds were carried out for PDH under different feeding and osmolarity conditions. In all of them the PDH controlled process outperformed the PGAP one in regard to CalB titer. The best PDH approach reached 3.6-fold more specific productivity than PGAP fed-batch at low μ. Compared to the optimum approach for PGAP-based process, the best PDH fed-batch strategy resulted in 2.3-fold higher titer, while the specific productivity was very similar. To summarize, PDH is an inducible promoter that exhibited a non-coupled growth regulation showing high performance, which provides a methanol-free additional solution to the usual growth-coupled systems for RPP. Thus, this novel system emerges as a potential alternative for K. phaffii RPP bioprocess and for revaluing crude glycerol, promoting the transition towards a circular economy.
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Affiliation(s)
- Núria Bernat-Camps
- Department of Chemical, Biological, and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Austrian Centre of Industrial Biotechnology (ACIB), Graz, Austria
| | | | | | | | - Miguel Angel Nieto-Taype
- Department of Chemical, Biological, and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Francisco Valero
- Department of Chemical, Biological, and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Austrian Centre of Industrial Biotechnology (ACIB), Graz, Austria
| | | | - Xavier Garcia-Ortega
- Department of Chemical, Biological, and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Austrian Centre of Industrial Biotechnology (ACIB), Graz, Austria
- *Correspondence: Xavier Garcia-Ortega,
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Jiang L, Zhang D, Li Y, Chen W, Shi W, Wu H, Ma Z. Eukaryotic Expression of the Cytochrome c Oxidase Subunit I of Sitophilus zeamais and Its Interaction with Allyl Isothiocyanate. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:3497-3507. [PMID: 36757172 DOI: 10.1021/acs.jafc.2c08363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) is a destructive pest of stored grains around the world. Allyl isothiocyanate (AITC) was shown to have good bioactivity in the control of S. zeamais. In this study, the interaction of AITC on cytochrome c oxidase core subunits I (COX I) and their binding mechanism were determined using spectroscopic, isothermal titration calorimetry and molecular docking techniques. The results indicate the binding constant (Ka) of AITC and COX I was 6.742 × 103 L/mol. Analysis of spectroscopic revealed that the binding of COX I to reduced Cyt c induced conformational changes of reduced Cyt c, while AITC could competitively bind and inhibit the activity of the COX I protein. Moreover, molecular docking results suggested a sulfur atom in the AITC structure could form a hydrogen bond having a length of 3.3 Å with the Gly- 27 of COX I.
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Affiliation(s)
- Linlin Jiang
- College of Plant Protection, Northwest A & F University, Yangling 712100, China
| | - Dan Zhang
- College of Plant Protection, Northwest A & F University, Yangling 712100, China
| | - Yue Li
- College of Plant Protection, Northwest A & F University, Yangling 712100, China
| | - Wei Chen
- College of Plant Protection, Northwest A & F University, Yangling 712100, China
| | - Weilin Shi
- College of Plant Protection, Northwest A & F University, Yangling 712100, China
| | - Hua Wu
- College of Plant Protection, Northwest A & F University, Yangling 712100, China
- Provincial Center for Bio-Pesticide Engineering, Yangling, Shaanxi Province 712100, China
| | - Zhiqing Ma
- College of Plant Protection, Northwest A & F University, Yangling 712100, China
- Provincial Center for Bio-Pesticide Engineering, Yangling, Shaanxi Province 712100, China
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