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Yao D, Ma Y, Ran J, Wang J, Kües U, Liu J, Zhou D, Zhang X, Fang Z, Xiao Y. Enhanced extracellular production of laccase in Coprinopsis cinerea by silencing chitinase gene. Appl Microbiol Biotechnol 2024; 108:324. [PMID: 38713211 PMCID: PMC11076350 DOI: 10.1007/s00253-024-13164-9] [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: 12/20/2023] [Revised: 03/27/2024] [Accepted: 04/24/2024] [Indexed: 05/08/2024]
Abstract
Laccase, a copper-containing polyphenol oxidase, is an important green biocatalyst. In this study, Laccase Lcc5 was homologous recombinantly expressed in Coprinopsis cinerea and a novel strategy of silencing chitinase gene expression was used to enhance recombinant Lcc5 extracellular yield. Two critical chitinase genes, ChiEn1 and ChiE2, were selected by analyzing the transcriptome data of C. cinerea FA2222, and their silent expression was performed by RNA interference (RNAi). It was found that silencing either ChiEn1 or ChiE2 reduced sporulation and growth rate, and increased cell wall sensitivity, but had no significant effect on mycelial branching. Among them, the extracellular laccase activity of the ChiE2-silenced engineered strain Cclcc5-antiChiE2-5 and the control Cclcc5-13 reached the highest values (38.2 and 25.5 U/mL, respectively) at 250 and 150 rpm agitation speeds, corresponding to productivity of 0.35 and 0.19 U/mL·h, respectively, in a 3-L fermenter culture. Moreover, since Cclcc5-antiChiE2-5 could withstand greater shear forces, its extracellular laccase activity was 2.6-fold higher than that of Cclcc5-13 when the agitation speed was all at 250 rpm. To our knowledge, this is the first report of enhanced recombinant laccase production in C. cinerea by silencing the chitinase gene. This study will pave the way for laccase industrial production and accelerate the development of a C. cinerea high-expression system. KEY POINTS: • ChiEn1 and ChiE2 are critical chitinase genes in C. cinerea FA2222 genome. • Chitinase gene silencing enhanced the tolerance of C. cinerea to shear forces. • High homologous production of Lcc5 is achieved by fermentation in a 3-L fermenter.
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Affiliation(s)
- Dongbang Yao
- School of Life Sciences, Anhui University, Hefei, 230601, China
- Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, Hefei, 230601, China
- AHU Green Industry Innovation Research Institute, Hefei, 230088, China
| | - Yuting Ma
- School of Life Sciences, Anhui University, Hefei, 230601, China
- Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, Hefei, 230601, China
| | - Jie Ran
- School of Life Sciences, Anhui University, Hefei, 230601, China
- Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, Hefei, 230601, China
| | - Jiaxiu Wang
- School of Life Sciences, Anhui University, Hefei, 230601, China
- Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, Hefei, 230601, China
| | - Ursula Kües
- Molecular Wood Biotechnology and Technical Mycology, Büsgen-Institute and Goettingen Center for Molecular Biosciences, University of Goettingen, Büsgenweg 2, 37077, Goettingen, Germany
| | - Juanjuan Liu
- School of Life Sciences, Anhui University, Hefei, 230601, China
- Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, Hefei, 230601, China
- AHU Green Industry Innovation Research Institute, Hefei, 230088, China
| | - Danya Zhou
- School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, China
| | - Xuecheng Zhang
- School of Life Sciences, Anhui University, Hefei, 230601, China
- Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, Hefei, 230601, China
- AHU Green Industry Innovation Research Institute, Hefei, 230088, China
| | - Zemin Fang
- School of Life Sciences, Anhui University, Hefei, 230601, China.
- Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, Hefei, 230601, China.
- AHU Green Industry Innovation Research Institute, Hefei, 230088, China.
| | - Yazhong Xiao
- School of Life Sciences, Anhui University, Hefei, 230601, China.
- Anhui Key Laboratory of Biocatalysis and Modern Biomanufacturing, Hefei, 230601, China.
- AHU Green Industry Innovation Research Institute, Hefei, 230088, China.
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Jia Y, Huang Q, Zhu L, Pan C. Characterization of a Recombinant Laccase B from Trametes hirsuta MX2 and Its Application for Decolorization of Dyes. Molecules 2022; 27:molecules27051581. [PMID: 35268682 PMCID: PMC8912056 DOI: 10.3390/molecules27051581] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 02/22/2022] [Accepted: 02/25/2022] [Indexed: 02/05/2023] Open
Abstract
Trametes hirsuta is able to secrete laccase isoenzymes including constitutive and inducible forms, and has potential application for bioremediation of environmental pollutants. Here, an inducible group B laccase from T. hirsuta MX2 was heterologously expressed in Pichia pastoris, and its yield reached 2.59 U/mL after 5 days of methanol inducing culture. The optimal pH and temperature of recombinant laccase (rLac1) to 2,2′-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) were 2.5 and 60 °C, respectively. Metal ions showed different effect on rLac1 which Mg2+, Cu2+, and K+ increased enzyme activity as their concentration increased, whereas Zn2+, Na+, and Fe2+ inhibited enzyme activity as their concentration increased. rLac1 showed good tolerance to organic solvents, and more than 42% of its initial activity remained in 10% organic solvents. Additionally, rLac1 exhibited a more efficient decolorization ability for remazol brilliant blue R (RBBR) than for acid red 1 (AR1), crystal violet (CV), and neutral red (NR). Molecular docking results showed RBBR has a stronger binding affinity with laccase than other dyes by interacting with substrate binding cavity of enzyme. The results indicated rLac1 may be a potential candidate for dye removal from textile wastewater.
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Affiliation(s)
- Yitong Jia
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Sciences, Zhejiang A&F University, Hangzhou 311300, China; (Y.J.); (Q.H.)
| | - Qianqian Huang
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Sciences, Zhejiang A&F University, Hangzhou 311300, China; (Y.J.); (Q.H.)
| | - Lanlan Zhu
- Science and Technology Service Center of Lin’an, Hangzhou 311300, China
- Correspondence: (L.Z.); (C.P.)
| | - Chengyuan Pan
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Sciences, Zhejiang A&F University, Hangzhou 311300, China; (Y.J.); (Q.H.)
- Correspondence: (L.Z.); (C.P.)
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