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Renfeld ZV, Chernykh AM, Egorova Shebanova AD, Baskunov BP, Gaidina AS, Myasoedova NM, Moiseeva OV, Kolomytseva MP. The Laccase of Myrothecium roridum VKM F-3565: A New Look at Fungal Laccase Tolerance to Neutral and Alkaline Conditions. Chembiochem 2023; 24:e202200600. [PMID: 36513608 DOI: 10.1002/cbic.202200600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/11/2022] [Accepted: 12/12/2022] [Indexed: 12/15/2022]
Abstract
Most of the currently known fungal laccases show their maximum activity under acidic environmental conditions. It is known that a decrease in the activity of a typical laccase at neutral or alkaline pH values is the result of an increase in the binding of the hydroxide anion to the T2/T3 copper center, which prevents the transfer of an electron from the T1 Cu to the trinuclear copper center. However, evolutionary pressure has resolved the existing limitations in the catalytic mechanism of laccase, allowing such enzymes to be functionally active under neutral/alkaline pH conditions, thereby giving fungi an advantage for their survival. Combined molecular and biochemical studies, homological modeling, calculation of the electrostatic potential on the Connolly surface at pH 5.0 and 7.0, and structural analysis of the novel alkaliphilic laccase of Myrothecium roridum VKM F-3565 and alkaliphilic and acidophilic fungal laccases with a known structure allowed a new intramolecular channel near the one of the catalytic aspartate residues at T2-copper atom to be found. The amino acid residues of alkaliphilic laccases forming this channel can presumably serve as proton donors for catalytic aspartates under neutral conditions, thus ensuring proper functioning. For the first time for ascomycetous laccases, the production of new trimeric products of phenylpropanoid condensation under neutral conditions has been shown, which could have a potential for use in pharmacology.
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Affiliation(s)
- Zhanna V Renfeld
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Center for Biological Research, Russian Academy of Sciences, Prosp. Nauki 5, Pushchino, Moscow Region, 142290, Russian Federation
| | - Alexey M Chernykh
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Center for Biological Research, Russian Academy of Sciences, Prosp. Nauki 5, Pushchino, Moscow Region, 142290, Russian Federation
| | - Anna D Egorova Shebanova
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Center for Biological Research, Russian Academy of Sciences, Prosp. Nauki 5, Pushchino, Moscow Region, 142290, Russian Federation
| | - Boris P Baskunov
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Center for Biological Research, Russian Academy of Sciences, Prosp. Nauki 5, Pushchino, Moscow Region, 142290, Russian Federation
| | - Anastasya S Gaidina
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Center for Biological Research, Russian Academy of Sciences, Prosp. Nauki 5, Pushchino, Moscow Region, 142290, Russian Federation
| | - Nina M Myasoedova
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Center for Biological Research, Russian Academy of Sciences, Prosp. Nauki 5, Pushchino, Moscow Region, 142290, Russian Federation
| | - Olga V Moiseeva
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Center for Biological Research, Russian Academy of Sciences, Prosp. Nauki 5, Pushchino, Moscow Region, 142290, Russian Federation
| | - Marina P Kolomytseva
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Pushchino Center for Biological Research, Russian Academy of Sciences, Prosp. Nauki 5, Pushchino, Moscow Region, 142290, Russian Federation
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Gou ZC, Lu MJ, Cui XY, Wang XQ, Jiang MY, Wang YS, Wang ZQ, Yu XX, Tang SS, Chen G, Su YJ. Enhanced laccase production by mutagenized Myrothecium verrucaria using corn stover as a carbon source and its potential in the degradation of 2-chlorophen. Bioprocess Biosyst Eng 2022; 45:1581-1593. [PMID: 35932338 DOI: 10.1007/s00449-022-02767-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 07/30/2022] [Indexed: 12/18/2022]
Abstract
Chlorophenols are widely used in industry and are known environmental pollutants. The degradation of chlorophenols is important for environmental remediation. In this study, we evaluated the biodegradation of 2-chlorophenol using crude laccase produced by Myrothecium verrucaria. Atmospheric and room temperature plasma technology was used to increase laccase production. The culture conditions of the M-6 mutant were optimized. Our results showed that corn stover could replace glucose as a carbon source and promote laccase production. The maximum laccase activity of 30.08 U/mL was achieved after optimization, which was a 19.04-fold increase. The biodegradation rate of 2-chlorophenol using crude laccase was 97.13%, a positive correlation was determined between laccase activity and degradation rate. The toxicity of 2-CP was substantially reduced after degradation by laccase solution. Our findings show the feasibility of the use of corn stover in laccase production by M. verrucaria mutant and the subsequent biodegradation of 2-chlorophenol using crude laccase.
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Affiliation(s)
- Ze-Chang Gou
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, Jilin, China.,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, 130118, Jilin, China
| | - Min-Jie Lu
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, Jilin, China.,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, 130118, Jilin, China
| | - Xiao-Yu Cui
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, Jilin, China.,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, 130118, Jilin, China
| | - Xi-Qing Wang
- College of Food Science Technology and Chemical Engineering, Hubei University of Arts and Science, Xiangyang, 441000, Hubei, China
| | - Mei-Yi Jiang
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, Jilin, China.,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, 130118, Jilin, China
| | - Ya-Shuo Wang
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, Jilin, China.,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, 130118, Jilin, China
| | - Zi-Qi Wang
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, Jilin, China.,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, 130118, Jilin, China
| | - Xiao-Xiao Yu
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, Jilin, China.,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, 130118, Jilin, China
| | - Shan-Shan Tang
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, Jilin, China.,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, 130118, Jilin, China
| | - Guang Chen
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, Jilin, China.,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, 130118, Jilin, China
| | - Ying-Jie Su
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, Jilin, China. .,Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, 130118, Jilin, China.
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