1
|
Zheng F, Yang J, Luo H, Sun Q, Zhang X, Li R, He X, Zhao G. Hydrolysis Mechanism of Multimodular Endoglucanases with Distinctive Domain Composition in the Saccharification of Cellulosic Substrates. Biomacromolecules 2024; 25:6007-6016. [PMID: 39207087 DOI: 10.1021/acs.biomac.4c00660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Two multimodular endoglucanases in glycoside hydrolase family 5, ReCel5 and ElCel5, share 73% identity and exhibit similar modular structures: family 1 carbohydrate-binding module (CBM1); catalytic domain; CBMX2; module of unknown function. However, they differed in their biochemical properties and catalytic performance. ReCel5 showed optimal activity at pH 4.0 and 70 °C, maintaining stability at 70 °C (>80% activity). Conversely, ElCel5 is optimal at pH 3.0 and 50 °C (>50% activity at 50 °C). ElCel5 excels in degrading CMC-Na (256 U/mg vs 53 U/mg of ReCel5). Five domain-truncated (TM1-TM5) and four domain-replaced (RM1-RM4) mutants of ReCel5 with the counterparts of ElCel5 were constructed, and their enzymatic properties were compared with those of the wild type. Only RM1, with ElCel5-CBM1, displayed enhanced thermostability and activity. The hydrolysis of pretreated corn stover was reduced in most TM and RM mutants. Molecular dynamics simulations revealed interdomain interactions within the multimodular endoglucanase, potentially affecting its structural stability and complex biological catalytic processes.
Collapse
Affiliation(s)
- Fei Zheng
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
- Beijing Key Laboratory of Food Processing and Safety in Forestry, Beijing Forestry University, Beijing 100083, China
| | - Junzhao Yang
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
- Beijing Key Laboratory of Food Processing and Safety in Forestry, Beijing Forestry University, Beijing 100083, China
| | - Huiying Luo
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Qingyang Sun
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
- Beijing Key Laboratory of Food Processing and Safety in Forestry, Beijing Forestry University, Beijing 100083, China
| | - Xinrui Zhang
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
- Beijing Key Laboratory of Food Processing and Safety in Forestry, Beijing Forestry University, Beijing 100083, China
| | - Ruilin Li
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
- Beijing Key Laboratory of Food Processing and Safety in Forestry, Beijing Forestry University, Beijing 100083, China
| | - Xiangwei He
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
- Beijing Key Laboratory of Food Processing and Safety in Forestry, Beijing Forestry University, Beijing 100083, China
| | - Guozhu Zhao
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China
- Beijing Key Laboratory of Food Processing and Safety in Forestry, Beijing Forestry University, Beijing 100083, China
| |
Collapse
|
2
|
Asemoloye MD, Bello TS, Oladoye PO, Remilekun Gbadamosi M, Babarinde SO, Ebenezer Adebami G, Olowe OM, Temporiti MEE, Wanek W, Marchisio MA. Engineered yeasts and lignocellulosic biomaterials: shaping a new dimension for biorefinery and global bioeconomy. Bioengineered 2023; 14:2269328. [PMID: 37850721 PMCID: PMC10586088 DOI: 10.1080/21655979.2023.2269328] [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: 06/24/2023] [Accepted: 10/03/2023] [Indexed: 10/19/2023] Open
Abstract
The next milestone of synthetic biology research relies on the development of customized microbes for specific industrial purposes. Metabolic pathways of an organism, for example, depict its chemical repertoire and its genetic makeup. If genes controlling such pathways can be identified, scientists can decide to enhance or rewrite them for different purposes depending on the organism and the desired metabolites. The lignocellulosic biorefinery has achieved good progress over the past few years with potential impact on global bioeconomy. This principle aims to produce different bio-based products like biochemical(s) or biofuel(s) from plant biomass under microbial actions. Meanwhile, yeasts have proven very useful for different biotechnological applications. Hence, their potentials in genetic/metabolic engineering can be fully explored for lignocellulosic biorefineries. For instance, the secretion of enzymes above the natural limit (aided by genetic engineering) would speed-up the down-line processes in lignocellulosic biorefineries and the cost. Thus, the next milestone would greatly require the development of synthetic yeasts with much more efficient metabolic capacities to achieve basic requirements for particular biorefinery. This review gave comprehensive overview of lignocellulosic biomaterials and their importance in bioeconomy. Many researchers have demonstrated the engineering of several ligninolytic enzymes in heterologous yeast hosts. However, there are still many factors needing to be well understood like the secretion time, titter value, thermal stability, pH tolerance, and reactivity of the recombinant enzymes. Here, we give a detailed account of the potentials of engineered yeasts being discussed, as well as the constraints associated with their development and applications.
Collapse
Affiliation(s)
- Michael Dare Asemoloye
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, Nankai District, China
- Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria
| | - Tunde Sheriffdeen Bello
- Department of Plant Biology, School of Life Sciences, Federal University of Technology Minna, Minna Niger State, Nigeria
| | | | | | - Segun Oladiran Babarinde
- Department of Plant, Food and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia, Canada
| | | | - Olumayowa Mary Olowe
- Food Security and Safety Focus Area, Faculty of Natural and Agricultural Sciences, North-West University, Private Mail Bag, Mmabatho, South Africa
| | | | - Wolfgang Wanek
- Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria
| | - Mario Andrea Marchisio
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, Nankai District, China
| |
Collapse
|