1
|
Zhang LB, Qiu TT, Qiu XG, Yang WWJ, Ye XY, Meng C. Transcriptomic and metabolomic analysis unveils a negative effect of glutathione metabolism on laccase activity in Cerrena unicolor 87613. Microbiol Spectr 2024; 12:e0340523. [PMID: 38230929 PMCID: PMC10846260 DOI: 10.1128/spectrum.03405-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 12/08/2023] [Indexed: 01/18/2024] Open
Abstract
The white rot fungus Cerrena unicolor 87613 has been previously shown to be a promising resource in laccase production, an enzyme with significant biotechnological applications. Conventional methods face technical challenges in improving laccase activity. Attempts are still being made to develop novel approaches for further enhancing laccase activity. This study aimed to understand the regulation of laccase activity in C. unicolor 87613 for a better exploration of the novel approach. Transcriptomic and metabolomic analyses were performed to identify key genes and metabolites involved in extracellular laccase activity. The findings indicated a strong correlation between the glutathione metabolism pathway and laccase activity. Subsequently, experimental verifications were conducted by manipulating the pathway using chemical approaches. The additive reduced glutathione (GSH) dose-dependently repressed laccase activity, while the GSH inhibitors (APR-246) and reactive oxygen species (ROS) inducer (H2O2) enhanced laccase activity. Changes in GSH levels could determine the intracellular redox homeostasis in interaction with ROS and partially affect the expression level of laccase genes in C. unicolor 87613 in turn. In addition, GSH synthetase was found to mediate GSH abundance in a feedback loop. This study suggests that laccase activity is negatively influenced by GSH metabolism and provides a theoretical basis for a novel strategy to enhance laccase activity by reprogramming glutathione metabolism at a specific cultivation stage.IMPORTANCEThe production of laccase activity is limited by various conventional approaches, such as heterologous expression, strain screening, and optimization of incubation conditions. There is an urgent need for a new strategy to meet industrial requirements more effectively. In this study, we conducted a comprehensive analysis of the transcriptome and metabolome of Cerrena unicolor 87613. For the first time, we discovered a negative role played by reduced glutathione (GSH) and its metabolic pathway in influencing extracellular laccase activity. Furthermore, we identified a feedback loop involving GSH, GSH synthetase gene, and GSH synthetase within this metabolic pathway. These deductions were confirmed through experimental investigations. These findings not only advanced our understanding of laccase activity regulation in its natural producer but also provide a theoretical foundation for a strategy to enhance laccase activity by reprogramming glutathione metabolism at a specific cultivation stage.
Collapse
Affiliation(s)
- Long-Bin Zhang
- The Key Laboratory of Marine Enzyme Engineering of Fujian Province, Fuzhou University, Fujian, China
- College of Biological Science and Engineering, Fuzhou University, Fujian, China
| | - Ting-Ting Qiu
- The Key Laboratory of Marine Enzyme Engineering of Fujian Province, Fuzhou University, Fujian, China
- College of Biological Science and Engineering, Fuzhou University, Fujian, China
| | - Xiu-Gen Qiu
- The Key Laboratory of Marine Enzyme Engineering of Fujian Province, Fuzhou University, Fujian, China
- College of Biological Science and Engineering, Fuzhou University, Fujian, China
| | - Wu-Wei-Jie Yang
- The Key Laboratory of Marine Enzyme Engineering of Fujian Province, Fuzhou University, Fujian, China
- College of Biological Science and Engineering, Fuzhou University, Fujian, China
| | - Xiu-Yun Ye
- The Key Laboratory of Marine Enzyme Engineering of Fujian Province, Fuzhou University, Fujian, China
- College of Biological Science and Engineering, Fuzhou University, Fujian, China
| | - Chun Meng
- The Key Laboratory of Marine Enzyme Engineering of Fujian Province, Fuzhou University, Fujian, China
- College of Biological Science and Engineering, Fuzhou University, Fujian, China
| |
Collapse
|
2
|
Zhang LB, Yang WWJ, Qiu TT. Genome-wide study of Cerrena unicolor 87613 laccase gene family and their mode prediction in association with substrate oxidation. BMC Genomics 2023; 24:504. [PMID: 37649000 PMCID: PMC10466755 DOI: 10.1186/s12864-023-09606-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 08/19/2023] [Indexed: 09/01/2023] Open
Abstract
BACKGROUND Laccases are green biocatalysts with wide industrial applications. The study of efficient and specific laccase producers remains a priority. Cerrena species have been shown to be promising basidiomycete candidates for laccase production. Although two sets of Cerrena genome data have been publicly published, no comprehensive bioinformatics study of laccase gene family in C. unicolor has been reported, particularly concerning the analysis of their three-dimensional (3D) structures and molecular docking to substrates, like ABTS and aflatoxin B1 (AFB1). RESULTS In this study, we conducted a comprehensive genome-wide analysis of laccase gene family in C. unicolor 87613. We identified eighteen laccase genes (CuLacs) and classified them into three clades using phylogenetic analysis. We characterized these laccases, including their location in contig 5,6,9,12,15,19,26,27, gene structures of different exon-intron arrangements, molecular weight ranging from 47.89 to 141.41 kDa, acidic pI value, 5-15 conserved protein motifs, signaling peptide of extracellular secretion (harbored by 13 CuLacs) and others. In addition, the analysis of cis-acting element in laccase promoters indicated that the transcription response of CuLac gene family was regulatable and complex under different environmental cues. Furthermore, analysis of transcription pattern revealed that CuLac8, 12 and CuLac2, 13 were the predominant laccases in response to copper ions or oxidative stress, respectively. Finally, we focused on the 3D structure analysis of CuLac proteins. Seven laccases with extra transmembrane domains or special sequences were particularly interesting. Predicted structures of each CuLac protein with or without these extra sequences showed altered interacting amino acid residues and binding sites, leading to varied affinities to both ABTS and AFB1. As far as we know, it is the first time to discuss the influence of the extra sequence on laccase's affinity to substrates. CONCLUSIONS Our findings provide robust genetic data for a better understanding of the laccase gene family in C. unicolor 87613, and create a foundation for the molecular redesign of CuLac proteins to enhance their industrial applications.
Collapse
Affiliation(s)
- Long-Bin Zhang
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China.
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China.
| | - Wu-Wei-Jie Yang
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China
| | - Ting-Ting Qiu
- Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, 350116, Fujian, China
| |
Collapse
|
3
|
Wang F, Yu X, Yu Z, Cui Y, Xu L, Huo S, Ding Z, Zhao L, Du L, Qiu Y. Improved laccase production by Trametes versicolor using Copper-Glycyl-L-Histidyl-L-Lysine as a novel and high-efficient inducer. Front Bioeng Biotechnol 2023; 11:1176352. [PMID: 37180036 PMCID: PMC10167017 DOI: 10.3389/fbioe.2023.1176352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 04/14/2023] [Indexed: 05/15/2023] Open
Abstract
A highly efficient strategy using Copper-Glycyl-L-Histidyl-L-Lysine (GHK-Cu) as a novel inducer was developed to enhance laccase production by Trametes versicolor. After medium optimization, laccase activity increased by 12.77-fold compared to that without GHK-Cu. The laccase production of 1113.8 U L-1 was obtained by scaling-up culture in 5-L stirring tank. The laccase production induced by CuSO4 was poorer than that of GHK-Cu at the same mole concentration. GHK-Cu could increase the permeability of cell membrane with less damage, and it facilitated the adsorption, accumulation, and utilization of copper by fungal cells, which was beneficial for laccase synthesis. GHK-Cu induced better expression of laccase related genes than that of CuSO4, resulting in higher laccase production. This study provided a useful method for induced production of laccase by applying GHK chelated metal ion as a non-toxic inducer, which reduced the safety risk of laccase broth and provided the potential application of crude laccase in food industry. In addition, GHK can be used as the carrier of different metal ions to enhance the production of other metalloenzymes.
Collapse
Affiliation(s)
- Feng Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- Institute of Agricultural Products Processing Engineering, Jiangsu University, Zhenjiang, China
| | - Xiaolei Yu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Zhuo Yu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Yi Cui
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Ling Xu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- Institute of Agricultural Products Processing Engineering, Jiangsu University, Zhenjiang, China
| | - Shuhao Huo
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Zhongyang Ding
- Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Liting Zhao
- Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Lizhi Du
- Shandong Dehemingxing Biotechnology Co., Ltd., Weifang, China
| | - Yanguo Qiu
- Shandong Dehemingxing Biotechnology Co., Ltd., Weifang, China
| |
Collapse
|
4
|
Hirakawa MP, Rodriguez A, Tran-Gyamfi MB, Light YK, Martinez S, Diamond-Pott H, Simmons BA, Sale KL. Phenothiazines Rapidly Induce Laccase Expression and Lignin-Degrading Properties in the White-Rot Fungus Phlebia radiata. J Fungi (Basel) 2023; 9:jof9030371. [PMID: 36983539 PMCID: PMC10053029 DOI: 10.3390/jof9030371] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/08/2023] [Accepted: 03/15/2023] [Indexed: 03/22/2023] Open
Abstract
Phlebia radiata is a widespread white-rot basidiomycete fungus with significance in diverse biotechnological applications due to its ability to degrade aromatic compounds, xenobiotics, and lignin using an assortment of oxidative enzymes including laccase. In this work, a chemical screen with 480 conditions was conducted to identify chemical inducers of laccase expression in P. radiata. Among the chemicals tested, phenothiazines were observed to induce laccase activity in P. radiata, with promethazine being the strongest laccase inducer of the phenothiazine-derived compounds examined. Secretomes produced by promethazine-treated P. radiata exhibited increased laccase protein abundance, increased enzymatic activity, and an enhanced ability to degrade phenolic model lignin compounds. Transcriptomics analyses revealed that promethazine rapidly induced the expression of genes encoding lignin-degrading enzymes, including laccase and various oxidoreductases, showing that the increased laccase activity was due to increased laccase gene expression. Finally, the generality of promethazine as an inducer of laccases in fungi was demonstrated by showing that promethazine treatment also increased laccase activity in other relevant fungal species with known lignin conversion capabilities including Trametes versicolor and Pleurotus ostreatus.
Collapse
Affiliation(s)
- Matthew P. Hirakawa
- Systems Biology Department, Sandia National Laboratories, Livermore, CA 94550, USA
- Correspondence: (M.P.H.); (K.L.S.)
| | - Alberto Rodriguez
- Biomaterials and Biomanufacturing Department, Sandia National Laboratories, Livermore, CA 94550, USA
| | - Mary B. Tran-Gyamfi
- Bioresource and Environmental Security Department, Sandia National Laboratories, Livermore, CA 94550, USA
| | - Yooli K. Light
- Systems Biology Department, Sandia National Laboratories, Livermore, CA 94550, USA
| | - Salvador Martinez
- Systems Biology Department, Sandia National Laboratories, Livermore, CA 94550, USA
| | - Henry Diamond-Pott
- Bioresource and Environmental Security Department, Sandia National Laboratories, Livermore, CA 94550, USA
| | - Blake A. Simmons
- Biological Systems & Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
- Deconstruction Division, Joint BioEnergy Institute, Emeryville, CA 94608, USA
| | - Kenneth L. Sale
- Deconstruction Division, Joint BioEnergy Institute, Emeryville, CA 94608, USA
- Computational Biology and Biophysics Department, Sandia National Laboratories, Livermore, CA 94550, USA
- Correspondence: (M.P.H.); (K.L.S.)
| |
Collapse
|
5
|
Transcriptome Profiling Reveals Differential Gene Expression of Laccase Genes in Aspergillus terreus KC462061 during Biodegradation of Crude Oil. BIOLOGY 2022; 11:biology11040564. [PMID: 35453763 PMCID: PMC9026905 DOI: 10.3390/biology11040564] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 03/30/2022] [Accepted: 04/05/2022] [Indexed: 01/01/2023]
Abstract
Fungal laccases have high catalytic efficiency and are utilized for the removal of crude oil because they oxidize various aliphatic and aromatic hydrocarbons and convert them into harmless compounds or less toxic compounds, thus accelerating the biodegradation potential of crude oil. Laccases are important gene families and the function of laccases genes varied widely based on transcription and function. Biodegradation of crude oil using Aspergillus terreus KC462061 was studied in the current study beside the transcription level of eight laccase (Lcc) genes have participated in biodegradation in the presence of aromatic compounds, and metal ions. Time-course profiles of laccase activity in the presence of crude oil indicated that the five inducers individual or combined have a very positive on laccase activity. In the status of the existence of crude oil, the synergistic effect of Cu-ABTS compound caused an increase in laccase yields up to 22-fold after 10 days than control. The biodegradation efficiencies of A. terreus KC462061 for aliphatic and aromatic hydrocarbons of crude oil were 82.1 ± 0.2% and 77.4 ± 0.6%, respectively. The crude oil biodegradation efficiency was improved by the supplemented Cu-ABTS compound in A. terreus KC462061. Gas chromatography-mass spectrometry was a very accurate tool to demonstrate the biodegradation efficiencies of A. terreus KC462061 for crude oil. Significant differences were observed in the SDS-PAGE of A. terreus KC462061 band intensities of laccase proteins after the addition of five inducers, but the Cu-ABTS compound highly affects very particular laccase electrophoresis. Quantitative real-time polymerase chain reaction (qPCR) was used for the analysis of transcription profile of eight laccase genes in A. terreus KC462061 with a verified reference gene. Cu2+ ions and Cu-ABTS were highly effective for efficient laccase expression profiling, mainly via Lcc11 and 12 transcription induction. The current study will explain the theoretical foundation for laccase transcription in A. terreus KC462061, paving the road for commercialization and usage.
Collapse
|
6
|
Araújo NL, Avelino KV, Halabura MIW, Marim RA, Kassem ASS, Linde GA, Colauto NB, do Valle JS. Use of green light to improve the production of lignocellulose-decay enzymes by Pleurotus spp. in liquid cultivation. Enzyme Microb Technol 2021; 149:109860. [PMID: 34311876 DOI: 10.1016/j.enzmictec.2021.109860] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 06/16/2021] [Accepted: 06/24/2021] [Indexed: 10/21/2022]
Abstract
The influence of green light on mycelium biomass growth and extracellular enzyme activities of edible mushrooms from the Pleurotus genus, which is popularly cultivated all over the world, were investigated. The mycelium of seven strains of five species of Pleurotus (P. citrinopileatus, P. djamor, P. eryngii, P. ostreatus, and P. pulmonarius) was grown in liquid medium at 28 °C in the dark or under green light (515-530 nm). The light source was light-emitting diodes (LED) with photon flux density adjusted to 20 μmol m-2 s-1 that was kept on throughout the cultivation period. After 12 days of growth, the mycelium was recovered and used for biomass determination and the cultivation medium was used to total cellulase, endoglucanase, xylanase, and laccase activities determination. Green light reduced the mycelial biomass growth of Pleurotus spp. but increased the cellulolytic and xylanolytic activities. The cellulolytic activity of most strains increased in the presence of green light with increases ranging from 1.5 times (P. ostreatus endoglucanase) to 8 times (P. citrinopileatus total cellulase and endoglucanase). Green light reduced laccase activity for most strains with the greatest reduction for P. eryngii (2.2 times lower). The specific enzymatic activity of cellulase and endoglucanase from P. citrinopileatus, increased by 31 times and 30 times, respectively, compared to the dark. Also, the specific laccase and xylanase activities of P. pulmonarius increased 4.4 times and 6.8 times, respectively, under green light. The use of light at particular wavelengths can be a viable strategy to increase the production of enzymes for different biotechnological applications and species of Pleurotus are particularly interesting for this purpose.
Collapse
Affiliation(s)
- Nelma Lopes Araújo
- Graduate Program in Biotechnology Applied to Agriculture, Paranaense University, Praça Mascarenhas de Moraes, 4282, Umuarama, PR, Brazil; Federal Institute of Paraná, PR 323 Road, KM 310, Umuarama, PR, Brazil.
| | - Katielle Vieira Avelino
- Graduate Program in Biotechnology Applied to Agriculture, Paranaense University, Praça Mascarenhas de Moraes, 4282, Umuarama, PR, Brazil.
| | | | - Renan Alberto Marim
- Graduate Program in Biotechnology Applied to Agriculture, Paranaense University, Praça Mascarenhas de Moraes, 4282, Umuarama, PR, Brazil.
| | - Adma Soraia Serea Kassem
- Graduate Program in Biotechnology Applied to Agriculture, Paranaense University, Praça Mascarenhas de Moraes, 4282, Umuarama, PR, Brazil.
| | - Giani Andrea Linde
- Graduate Program in Biotechnology Applied to Agriculture, Paranaense University, Praça Mascarenhas de Moraes, 4282, Umuarama, PR, Brazil.
| | - Nelson Barros Colauto
- Graduate Program in Biotechnology Applied to Agriculture, Paranaense University, Praça Mascarenhas de Moraes, 4282, Umuarama, PR, Brazil.
| | - Juliana Silveira do Valle
- Graduate Program in Biotechnology Applied to Agriculture, Paranaense University, Praça Mascarenhas de Moraes, 4282, Umuarama, PR, Brazil.
| |
Collapse
|