101
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Maestre-Reyna M, Liu WC, Jeng WY, Lee CC, Hsu CA, Wen TN, Wang AHJ, Shyur LF. Structural and functional roles of glycosylation in fungal laccase from Lentinus sp. PLoS One 2015; 10:e0120601. [PMID: 25849464 PMCID: PMC4388643 DOI: 10.1371/journal.pone.0120601] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 01/24/2015] [Indexed: 12/02/2022] Open
Abstract
Laccases are multi-copper oxidases that catalyze the oxidation of various organic and inorganic compounds by reducing O2 to water. Here we report the crystal structure at 1.8 Å resolution of a native laccase (designated nLcc4) isolated from a white-rot fungus Lentinus sp. nLcc4 is composed of three cupredoxin-like domains D1-D3 each folded into a Greek key β-barrel topology. T1 and T2/T3 copper binding sites and three N-glycosylated sites at Asn75, Asn238, and Asn458 were elucidated. Initial rate kinetic analysis revealed that the kcat, Km, and kcat/Km of nLcc4 with substrate ABTS were 3,382 s-1, 65.0 ± 6.5 μM, and 52 s-1μM-1, respectively; and the values with lignosulfonic acid determined using isothermal titration calorimetry were 0.234 s-1, 56.7 ± 3.2 μM, and 0.004 s-1μM-1, respectively. Endo H-deglycosylated nLcc4 (dLcc4), with only one GlcNAc residue remaining at each of the three N-glycosylation sites in the enzyme, exhibited similar kinetic efficiency and thermal stability to that of nLcc4. The isolated Lcc4 gene contains an open reading frame of 1563 bp with a deduced polypeptide of 521 amino acid residues including a predicted signaling peptide of 21 residues at the N-terminus. Recombinant wild-type Lcc4 and mutant enzymes N75D, N238D and N458D were expressed in Pichia pastoris cells to evaluate the effect on enzyme activity by single glycosylation site deficiency. The mutant enzymes secreted in the cultural media of P. pastoris cells were observed to maintain only 4-50% of the activity of the wild-type laccase. Molecular dynamics simulations analyses of various states of (de-)glycosylation in nLcc support the kinetic results and suggest that the local H-bond networks between the domain connecting loop D2-D3 and the glycan moieties play a crucial role in the laccase activity. This study provides new insights into the role of glycosylation in the structure and function of a Basidiomycete fungal laccase.
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Affiliation(s)
| | - Wei-Chun Liu
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
| | - Wen-Yih Jeng
- Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
- Core Facilities for Protein Structural Analysis, Academia Sinica, Taipei, Taiwan
| | - Cheng-Chung Lee
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
- Core Facilities for Protein Structural Analysis, Academia Sinica, Taipei, Taiwan
| | - Chih-An Hsu
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Tuan-Nan Wen
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan
| | - Andrew H.-J. Wang
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
- Core Facilities for Protein Structural Analysis, Academia Sinica, Taipei, Taiwan
- Ph.D. Program for Translational Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Lie-Fen Shyur
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
- Ph.D. Program for Translational Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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102
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Glazunova OA, Polyakov KM, Fedorova TV, Dorovatovskii PV, Koroleva OV. Elucidation of the crystal structure of Coriolopsis caperata laccase: restoration of the structure and activity of the native enzyme from the T2-depleted form by copper ions. ACTA ACUST UNITED AC 2015; 71:854-61. [PMID: 25849396 DOI: 10.1107/s1399004715001595] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 01/23/2015] [Indexed: 01/28/2023]
Abstract
Laccases are members of a large family of multicopper oxidases that catalyze the oxidation of a wide range of organic and inorganic substrates accompanied by the reduction of dioxygen to water. A new laccase was isolated from the basidiomycete Coriolopsis caperata strain 0677 and its amino-acid sequence was determined. According to its physicochemical properties and spectroscopic features, the laccase from C. caperata is a high redox-potential blue laccase. Attempts to crystallize the native enzyme were unsuccessful. The copper type 2-depleted (T2D) laccase was prepared and crystallized. The structure of T2D laccase from C. caperata was solved at 1.6 Å resolution, and attempts to reconstruct the T2 copper centre were performed using Cu(+) and Cu(2+) ions. The structure of T2D+Cu(+) laccase was solved at 1.89 Å resolution. It was shown that the T2D+Cu(+) laccase structure contained four copper ions in the active site. Reconstruction could not be achieved when the T2D laccase crystals were treated with CuSO4.
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Affiliation(s)
- Olga A Glazunova
- A. N. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russian Federation
| | - Konstantin M Polyakov
- A. N. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russian Federation
| | - Tatyana V Fedorova
- A. N. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russian Federation
| | - Pavel V Dorovatovskii
- National Research Centre `Kurchatov Institute', Acad. Kurchatov Sq. 1, Moscow 123182, Russian Federation
| | - Olga V Koroleva
- A. N. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russian Federation
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103
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Abstract
Thermophilic and thermotolerant micro-organisms strains have served as the natural source of industrially relevant and thermostable enzymes. Although some strains of the Trametes
genus are thermotolerant, few Trametes
strains were studied at the temperature above 30 °C until now. In this paper, the laccase activity and the mycelial growth rate for Trametes trogii
LK13 are superior at 37 °C. Thermostability and organic cosolvent tolerance assays of the laccase produced at 37 °C indicated that the enzyme possessed fair thermostability with 50% of its initial activity at 80 °C for 5 min, and could remain 50% enzyme activity treated with organic cosolvent at the concentration range of 25%–50% (v/v). Furthermore, the test on production of laccase and lignocellulolytic enzymes showed the crude enzymes possessed high laccase level (1000 U g
−1
) along with low cellulose (2 U g
−1
) and xylanase (140 U g
−1
) activity. Thus, T. trogii
LK13 is a potential strain to be applied in many biotechnological processes.
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Affiliation(s)
- Jinping Yan
- Biotechnology Research Center of Life Science and Technology College, Kunming University of Science and Technology, Kunming Yunnan, PR China
| | - Yuhui Chen
- College of Life Science, The Southwest Forest University, Kunming Yunnan, PR China
| | - Jiezhen Niu
- Biotechnology Research Center of Life Science and Technology College, Kunming University of Science and Technology, Kunming Yunnan, PR China
| | - Daidi Chen
- Biotechnology Research Center of Life Science and Technology College, Kunming University of Science and Technology, Kunming Yunnan, PR China
| | - Irbis Chagan
- Biotechnology Research Center of Life Science and Technology College, Kunming University of Science and Technology, Kunming Yunnan, PR China
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104
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Merlini L, Boccia AC, Mendichi R, Galante YM. Enzymatic and chemical oxidation of polygalactomannans from the seeds of a few species of leguminous plants and characterization of the oxidized products. J Biotechnol 2015; 198:31-43. [DOI: 10.1016/j.jbiotec.2015.01.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 01/16/2015] [Accepted: 01/26/2015] [Indexed: 11/28/2022]
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105
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Computational analysis and low-scale constitutive expression of laccases synthetic genes GlLCC1 from Ganoderma lucidum and POXA 1B from Pleurotus ostreatus in Pichia pastoris. PLoS One 2015; 10:e0116524. [PMID: 25611746 PMCID: PMC4303304 DOI: 10.1371/journal.pone.0116524] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 11/24/2014] [Indexed: 11/19/2022] Open
Abstract
Lacasses are multicopper oxidases that can catalyze aromatic and non-aromatic compounds concomitantly with reduction of molecular oxygen to water. Fungal laccases have generated a growing interest due to their biotechnological potential applications, such as lignocellulosic material delignification, biopulping and biobleaching, wastewater treatment, and transformation of toxic organic pollutants. In this work we selected fungal genes encoding for laccase enzymes GlLCC1 in Ganoderma lucidum and POXA 1B in Pleurotus ostreatus. These genes were optimized for codon use, GC content, and regions generating secondary structures. Laccase proposed computational models, and their interaction with ABTS [2, 2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)] substrate was evaluated by molecular docking. Synthetic genes were cloned under the control of Pichia pastoris glyceraldehyde-3-phosphate dehydrogenase (GAP) constitutive promoter. P. pastoris X-33 was transformed with pGAPZαA-LaccGluc-Stop and pGAPZαA-LaccPost-Stop constructs. Optimization reduced GC content by 47 and 49% for LaccGluc-Stop and LaccPost-Stop genes, respectively. A codon adaptation index of 0.84 was obtained for both genes. 3D structure analysis using SuperPose revealed LaccGluc-Stop is similar to the laccase crystallographic structure 1GYC of Trametes versicolor. Interaction analysis of the 3D models validated through ABTS, demonstrated higher substrate affinity for LaccPost-Stop, in agreement with our experimental results with enzymatic activities of 451.08 ± 6.46 UL-1 compared to activities of 0.13 ± 0.028 UL-1 for LaccGluc-Stop. This study demonstrated that G. lucidum GlLCC1 and P. ostreatus POXA 1B gene optimization resulted in constitutive gene expression under GAP promoter and α-factor leader in P. pastoris. These are important findings in light of recombinant enzyme expression system utility for environmentally friendly designed expression systems, because of the wide range of substrates that laccases can transform. This contributes to a great gamut of products in diverse settings: industry, clinical and chemical use, and environmental applications.
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106
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Laccase engineering: From rational design to directed evolution. Biotechnol Adv 2015; 33:25-40. [DOI: 10.1016/j.biotechadv.2014.12.007] [Citation(s) in RCA: 168] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Revised: 12/17/2014] [Accepted: 12/21/2014] [Indexed: 10/24/2022]
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107
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Ramírez-Cavazos LI, Junghanns C, Ornelas-Soto N, Cárdenas-Chávez DL, Hernández-Luna C, Demarche P, Enaud E, García-Morales R, Agathos SN, Parra R. Purification and characterization of two thermostable laccases from Pycnoporus sanguineus and potential role in degradation of endocrine disrupting chemicals. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2014.06.006] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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108
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Structural insights into 2,2'-azino-Bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS)-mediated degradation of reactive blue 21 by engineered Cyathus bulleri Laccase and characterization of degradation products. Appl Environ Microbiol 2014; 80:7484-95. [PMID: 25261507 DOI: 10.1128/aem.02665-14] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Advanced oxidation processes are currently used for the treatment of different reactive dyes which involve use of toxic catalysts. Peroxidases are reported to be effective on such dyes and require hydrogen peroxide and/or metal ions. Cyathus bulleri laccase, expressed in Pichia pastoris, catalyzes efficient degradation (78 to 85%) of reactive azo dyes (reactive black 5, reactive orange 16, and reactive red 198) in the presence of synthetic mediator ABTS [2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)]. This laccase was engineered to degrade effectively reactive blue 21 (RB21), a phthalocyanine dye reported to be decolorized only by peroxidases. The 816-bp segment (toward the C terminus) of the lcc gene was subjected to random mutagenesis and enzyme variants (Lcc35, Lcc61, and Lcc62) were selected based on increased ABTS oxidizing ability. Around 78 to 95% decolorization of RB21 was observed with the ABTS-supplemented Lcc variants in 30 min. Analysis of the degradation products by mass spectrometry indicated the formation of several low-molecular-weight compounds. Mapping the mutations on the modeled structure implicated residues both near and far from the T1 Cu site that affected the catalytic efficiency of the mutant enzymes on ABTS and, in turn, the rate of oxidation of RB21. Several inactive clones were also mapped. The importance of geometry as well as electronic changes on the reactivity of laccases was indicated.
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109
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Liu Y, Cusano AM, Wallace EC, Mekmouche Y, Ullah S, Robert V, Tron T. Characterization of C-terminally engineered laccases. Int J Biol Macromol 2014; 69:435-41. [DOI: 10.1016/j.ijbiomac.2014.05.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 05/16/2014] [Accepted: 05/20/2014] [Indexed: 10/25/2022]
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110
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Fonseca-Maldonado R, Ribeiro LF, Furtado GP, Arruda LM, Meleiro LP, Alponti JS, Botelho-Machado C, Vieira DS, Bonneil E, Furriel RDPM, Thibault P, Ward RJ. Synergistic action of co-expressed xylanase/laccase mixtures against milled sugar cane bagasse. Process Biochem 2014. [DOI: 10.1016/j.procbio.2014.03.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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111
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Megarity CF, Looi HK, Timson DJ. The Saccharomyces cerevisiae quinone oxidoreductase Lot6p: stability, inhibition and cooperativity. FEMS Yeast Res 2014; 14:797-807. [PMID: 24866129 DOI: 10.1111/1567-1364.12167] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 05/13/2014] [Accepted: 05/22/2014] [Indexed: 11/28/2022] Open
Abstract
Lot6p (EC 1.5.1.39; Ylr011wp) is the sole quinone oxidoreductase in the budding yeast, Saccharomyces cerevisiae. Using hexahistidine tagged, recombinant Lot6p, we determined the steady-state enzyme kinetic parameters with both NADH and NADPH as electron donors; no cooperativity was observed with these substrates. The NQO1 inhibitor curcumin, the NQO2 inhibitor resveratrol, the bacterial nitroreductase inhibitor nicotinamide and the phosphate mimic vanadate all stabilise the enzyme towards thermal denaturation as judged by differential scanning fluorimetry. All except vanadate have no observable effect on the chemical cross-linking of the two subunits of the Lot6p dimer. These compounds all inhibit Lot6p's oxidoreductase activity, and all except nicotinamide exhibit negative cooperativity. Molecular modelling suggests that curcumin, resveratrol and nicotinamide all bind over the isoalloxazine ring of the FMN cofactor in Lot6p. Resveratrol was predicted to contact an α-helix that links the two active sites. Mutation of Gly-142 (which forms part of this helix) to serine does not greatly affect the thermal stability of the enzyme. However, this variant shows less cooperativity towards resveratrol than the wild type. This suggests a plausible hypothesis for the transmission of information between the subunits and, thus, the molecular mechanism of negative cooperativity in Lot6p.
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Affiliation(s)
- Clare F Megarity
- School of Biological Sciences, Medical Biology Centre, Queen's University Belfast, Belfast, UK
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112
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Brander S, Mikkelsen JD, Kepp KP. Characterization of an alkali- and halide-resistant laccase expressed in E. coli: CotA from Bacillus clausii. PLoS One 2014; 9:e99402. [PMID: 24915287 PMCID: PMC4051777 DOI: 10.1371/journal.pone.0099402] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Accepted: 05/13/2014] [Indexed: 01/25/2023] Open
Abstract
The limitations of fungal laccases at higher pH and salt concentrations have intensified the search for new extremophilic bacterial laccases. We report the cloning, expression, and characterization of the bacterial cotA from Bacillus clausii, a supposed alkalophilic ortholog of cotA from B. subtilis. Both laccases were expressed in E. coli strain BL21(DE3) and characterized fully in parallel for strict benchmarking. We report activity on ABTS, SGZ, DMP, caffeic acid, promazine, phenyl hydrazine, tannic acid, and bilirubin at variable pH. Whereas ABTS, promazine, and phenyl hydrazine activities vs. pH were similar, the activity of B. clausii cotA was shifted upwards by ∼0.5–2 pH units for the simple phenolic substrates DMP, SGZ, and caffeic acid. This shift is not due to substrate affinity (KM) but to pH dependence of catalytic turnover: The kcat of B. clausii cotA was 1 s−1 at pH 6 and 5 s−1 at pH 8 in contrast to 6 s−1 at pH 6 and 2 s−1 at pH 8 for of B. subtilis cotA. Overall, kcat/KM was 10-fold higher for B. subtilis cotA at pHopt. While both proteins were heat activated, activation increased with pH and was larger in cotA from B. clausii. NaCl inhibited activity at acidic pH, but not up to 500–700 mM NaCl in alkaline pH, a further advantage of the alkali regime in laccase applications. The B. clausii cotA had ∼20 minutes half-life at 80°C, less than the ∼50 minutes at 80°C for cotA from B. subtilis. While cotA from B. subtilis had optimal stability at pH∼8, the cotA from B. clausii displayed higher combined salt- and alkali-resistance. This resistance is possibly caused by two substitutions (S427Q and V110E) that could repel anions to reduce anion-copper interactions at the expense of catalytic proficiency, a trade-off of potential relevance to laccase optimization.
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Affiliation(s)
- Søren Brander
- Technical University of Denmark, DTU Chemical Engineering, Kongens Lyngby, Denmark
- Technical University of Denmark, DTU Chemistry, Kongens Lyngby, Denmark
| | - Jørn D. Mikkelsen
- Technical University of Denmark, DTU Chemical Engineering, Kongens Lyngby, Denmark
| | - Kasper P. Kepp
- Technical University of Denmark, DTU Chemistry, Kongens Lyngby, Denmark
- * E-mail:
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113
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Kurose T, Saito Y, Kimata K, Nakagawa Y, Yano A, Ito K, Kawarasaki Y. Secretory expression of Lentinula edodes intracellular laccase by yeast high-cell-density system: Sub-milligram production of difficult-to-express secretory protein. J Biosci Bioeng 2014; 117:659-63. [DOI: 10.1016/j.jbiosc.2013.11.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2013] [Revised: 11/18/2013] [Accepted: 11/19/2013] [Indexed: 11/29/2022]
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114
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Akram MS, Ur Rehman J, Hall EAH. Engineered proteins for bioelectrochemistry. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2014; 7:257-274. [PMID: 24818813 DOI: 10.1146/annurev-anchem-071213-020143] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
It is only in the past two decades that excellent protein engineering tools have begun to meet parallel advances in materials chemistry, nanofabrication, and electronics. This is revealing scenarios from which synthetic enzymes can emerge, which were previously impossible, as well as interfaces with novel electrode materials. That means the control of the protein structure, electron transport pathway, and electrode surface can usher us into a new era of bioelectrochemistry. This article reviews the principle of electron transfer (ET) and considers how its application at the electrode, within the protein, and at a redox group is directing key advances in the understanding of protein structure to create systems that exhibit better efficiency and unique bioelectrochemistry.
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Affiliation(s)
- Muhammad Safwan Akram
- Institute of Biotechnology, Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB2 1QT United Kingdom;
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115
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Solomon EI, Heppner DE, Johnston EM, Ginsbach JW, Cirera J, Qayyum M, Kieber-Emmons MT, Kjaergaard CH, Hadt RG, Tian L. Copper active sites in biology. Chem Rev 2014; 114:3659-853. [PMID: 24588098 PMCID: PMC4040215 DOI: 10.1021/cr400327t] [Citation(s) in RCA: 1135] [Impact Index Per Article: 113.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
| | - David E. Heppner
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | | | - Jake W. Ginsbach
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | - Jordi Cirera
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | - Munzarin Qayyum
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | | | | | - Ryan G. Hadt
- Department of Chemistry, Stanford University, Stanford, CA, 94305
| | - Li Tian
- Department of Chemistry, Stanford University, Stanford, CA, 94305
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116
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Setting the stage for electron transfer: Molecular basis of ABTS-binding to four laccases from Trametes versicolor at variable pH and protein oxidation state. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2013.11.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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117
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Macellaro G, Baratto MC, Piscitelli A, Pezzella C, Fabrizi de Biani F, Palmese A, Piumi F, Record E, Basosi R, Sannia G. Effective mutations in a high redox potential laccase from Pleurotus ostreatus. Appl Microbiol Biotechnol 2014; 98:4949-61. [PMID: 24463760 DOI: 10.1007/s00253-013-5491-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 12/16/2013] [Accepted: 12/22/2013] [Indexed: 10/25/2022]
Abstract
Since the first report on a laccase, there has been a notable development in the interest towards this class of enzymes, highlighted from the number of scientific papers and patents about them. At the same time, interest in exploiting laccases-mainly high redox potential-for various functions has been growing exponentially over the last 10 years. Despite decades of work, the molecular determinants of the redox potential are far to be fully understood. For this reason, interest in tuning laccase redox potential to provide more efficient catalysts has been growing since the last years. The work herein described takes advantage of the filamentous fungus Aspergillus niger as host for the heterologous production of the high redox potential laccase POXA1b from Pleurotus ostreatus and of one of its in vitro selected variants (1H6C). The system herein developed allowed to obtain a production level of 35,000 U/L (583.3 μkat/L) for POXA1b and 60,000 U/L (1,000 μkat/L) for 1H6C, corresponding to 13 and 20 mg/L for POXA1b and 1H6C, respectively. The characterised proteins exhibit very similar characteristics, with some exceptions regarding catalytic behaviour, stability and spectro-electrochemical properties. Remarkably, the 1H6C variant shows a higher redox potential with respect to POXA1b. Furthermore, the spectro-electrochemical results obtained for 1H6C make it tempting to claim that we spectro-electrochemically determined the redox potential of the 1H6C T2 site, which has not been studied in any detail by spectro-electrochemistry yet.
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Affiliation(s)
- Gemma Macellaro
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, via Cinthia 4, 80126, Naples, Italy
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118
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Kinetic role of a histidine residue in the T1 copper site of the laccase from Rigidoporus lignosus. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2013.10.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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119
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Rivera-Hoyos CM, Morales-Álvarez ED, Poutou-Piñales RA, Pedroza-Rodríguez AM, RodrÍguez-Vázquez R, Delgado-Boada JM. Fungal laccases. FUNGAL BIOL REV 2013. [DOI: 10.1016/j.fbr.2013.07.001] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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120
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Mate DM, Gonzalez-Perez D, Falk M, Kittl R, Pita M, De Lacey AL, Ludwig R, Shleev S, Alcalde M. Blood tolerant laccase by directed evolution. ACTA ACUST UNITED AC 2013; 20:223-31. [PMID: 23438751 DOI: 10.1016/j.chembiol.2013.01.001] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 12/19/2012] [Accepted: 12/20/2012] [Indexed: 10/27/2022]
Abstract
High-redox potential laccases are powerful biocatalysts with a wide range of applications in biotechnology. We have converted a thermostable laccase from a white-rot fungus into a blood tolerant laccase. Adapting the fitness of this laccase to the specific composition of human blood (above neutral pH, high chloride concentration) required several generations of directed evolution in a surrogate complex blood medium. Our evolved laccase was tested in both human plasma and blood, displaying catalytic activity while retaining a high redox potential at the T1 copper site. Mutations introduced in the second coordination sphere of the T1 site shifted the pH activity profile and drastically reduced the inhibitory effect of chloride. This proof of concept that laccases can be adapted to function in extreme conditions opens an array of opportunities for implantable nanobiodevices, chemical syntheses, and detoxification.
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Affiliation(s)
- Diana M Mate
- Department of Biocatalysis, Institute of Catalysis, CSIC, 28049 Madrid, Spain
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121
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Mekmouche Y, Zhou S, Cusano AM, Record E, Lomascolo A, Robert V, Simaan AJ, Rousselot-Pailley P, Ullah S, Chaspoul F, Tron T. Gram-scale production of a basidiomycetous laccase in Aspergillus niger. J Biosci Bioeng 2013; 117:25-7. [PMID: 23867099 DOI: 10.1016/j.jbiosc.2013.06.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 06/06/2013] [Accepted: 06/12/2013] [Indexed: 11/27/2022]
Abstract
We report on the expression in Aspergillus niger of a laccase gene we used to produce variants in Saccharomyces cerevisiae. Grams of recombinant enzyme can be easily obtained. This highlights the potential of combining this generic laccase sequence to the yeast and fungal expression systems for large-scale productions of variants.
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Affiliation(s)
- Yasmina Mekmouche
- Aix Marseille Université, CNRS, iSm2 UMR 7313, 13397 Marseille, France.
| | - Simeng Zhou
- Aix Marseille Université, CNRS, iSm2 UMR 7313, 13397 Marseille, France; Aix-Marseille Université, INRA, UMR 1163, Biotechnologie des Champignons Filamenteux, Faculté des Sciences de Luminy-Polytech, Case 925, 13009 Marseille, France
| | - Angela M Cusano
- Aix Marseille Université, CNRS, iSm2 UMR 7313, 13397 Marseille, France
| | - Eric Record
- Aix-Marseille Université, INRA, UMR 1163, Biotechnologie des Champignons Filamenteux, Faculté des Sciences de Luminy-Polytech, Case 925, 13009 Marseille, France
| | - Anne Lomascolo
- Aix-Marseille Université, INRA, UMR 1163, Biotechnologie des Champignons Filamenteux, Faculté des Sciences de Luminy-Polytech, Case 925, 13009 Marseille, France
| | - Viviane Robert
- Aix Marseille Université, CNRS, iSm2 UMR 7313, 13397 Marseille, France
| | - A Jalila Simaan
- Aix Marseille Université, CNRS, iSm2 UMR 7313, 13397 Marseille, France
| | | | - Sana Ullah
- Aix Marseille Université, CNRS, iSm2 UMR 7313, 13397 Marseille, France
| | - Florence Chaspoul
- Aix-Marseille Université, CNRS, IMBE, UMR 7263, Laboratoire Chimie Physique et Prévention des Risques et Nuisances Technologiques, FR3098 ECCOREV, Faculté de Pharmacie, F-13005 Marseille, France
| | - Thierry Tron
- Aix Marseille Université, CNRS, iSm2 UMR 7313, 13397 Marseille, France
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122
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Wong KS, Cheung MK, Au CH, Kwan HS. A novel Lentinula edodes laccase and its comparative enzymology suggest guaiacol-based laccase engineering for bioremediation. PLoS One 2013; 8:e66426. [PMID: 23799101 PMCID: PMC3683064 DOI: 10.1371/journal.pone.0066426] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 05/09/2013] [Indexed: 11/18/2022] Open
Abstract
Laccases are versatile biocatalysts for the bioremediation of various xenobiotics, including dyes and polyaromatic hydrocarbons. However, current sources of new enzymes, simple heterologous expression hosts and enzymatic information (such as the appropriateness of common screening substrates on laccase engineering) remain scarce to support efficient engineering of laccase for better "green" applications. To address the issue, this study began with cloning the laccase family of Lentinula edodes. Three laccases perfectio sensu stricto (Lcc4A, Lcc5, and Lcc7) were then expressed from Pichia pastoris, characterized and compared with the previously reported Lcc1A and Lcc1B in terms of kinetics, stability, and degradation of dyes and polyaromatic hydrocarbons. Lcc7 represented a novel laccase, and it exhibited both the highest catalytic efficiency (assayed with 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) [ABTS]) and thermostability. However, its performance on "green" applications surprisingly did not match the activity on the common screening substrates, namely, ABTS and 2,6-dimethoxyphenol. On the other hand, correlation analyses revealed that guaiacol is much better associated with the decolorization of multiple structurally different dyes than are the two common screening substrates. Comparison of the oxidation chemistry of guaiacol and phenolic dyes, such as azo dyes, further showed that they both involve generation of phenoxyl radicals in laccase-catalyzed oxidation. In summary, this study concluded a robust expression platform of L. edodes laccases, novel laccases, and an indicative screening substrate, guaiacol, which are all essential fundamentals for appropriately driving the engineering of laccases towards more efficient "green" applications.
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Affiliation(s)
- Kin-Sing Wong
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Man-Kit Cheung
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Chun-Hang Au
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Hoi-Shan Kwan
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
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123
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Ardhaoui M, Zheng M, Pulpytel J, Dowling D, Jolivalt C, Khonsari FA. Plasma functionalized carbon electrode for laccase-catalyzed oxygen reduction by direct electron transfer. Bioelectrochemistry 2013; 91:52-61. [DOI: 10.1016/j.bioelechem.2012.12.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 12/13/2012] [Accepted: 12/18/2012] [Indexed: 10/27/2022]
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124
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Jeon JR, Chang YS. Laccase-mediated oxidation of small organics: bifunctional roles for versatile applications. Trends Biotechnol 2013; 31:335-41. [DOI: 10.1016/j.tibtech.2013.04.002] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 04/02/2013] [Accepted: 04/02/2013] [Indexed: 12/01/2022]
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125
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Hahn V, Mikolasch A, Schauer F. Cleavage and synthesis function of high and low redox potential laccases towards 4-morpholinoaniline and aminated as well as chlorinated phenols. Appl Microbiol Biotechnol 2013; 98:1609-20. [DOI: 10.1007/s00253-013-4984-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 04/30/2013] [Accepted: 05/02/2013] [Indexed: 11/24/2022]
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126
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Rasmussen M, Shrier A, Minteer SD. High performance thylakoid bio-solar cell using laccase enzymatic biocathodes. Phys Chem Chem Phys 2013; 15:9062-5. [PMID: 23666112 DOI: 10.1039/c3cp51813b] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thylakoid membranes have previously been used for electrochemical solar energy conversion, but the current output and open circuit voltage are low, in part due to limitations of the cathode. In this paper, a thylakoid bioanode and laccase biocathode were combined in the construction of a bio-solar cell capable of light-induced generation of electrical power. This two-compartment cell showed a greater than 5-fold increase in short circuit current density and an open circuit voltage 0.275 V larger than that of a thylakoid bio-solar cell incorporating an air-breathing Pt cathode. The electrodes were then tested in several solutions of varying pH to evaluate the possibility of constructing a compartment-less bio-solar cell. This membrane-less cell, operating at pH 5.5, generated a short circuit photocurrent density of 14.0 ± 1.8 μA cm(-2) which is 25% larger than the two-compartment cell and a similar open circuit voltage of 0.720 ± 0.018 V.
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Affiliation(s)
- Michelle Rasmussen
- Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA
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127
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Kakuda S, Peterson RL, Ohkubo K, Karlin KD, Fukuzumi S. Enhanced catalytic four-electron dioxygen (O2) and two-electron hydrogen peroxide (H2O2) reduction with a copper(II) complex possessing a pendant ligand pivalamido group. J Am Chem Soc 2013; 135:6513-22. [PMID: 23509853 PMCID: PMC3682076 DOI: 10.1021/ja3125977] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A copper complex, [(PV-tmpa)Cu(II)](ClO4)2 (1) [PV-tmpa = bis(pyrid-2-ylmethyl){[6-(pivalamido)pyrid-2-yl]methyl}amine], acts as a more efficient catalyst for the four-electron reduction of O2 by decamethylferrocene (Fc*) in the presence of trifluoroacetic acid (CF3COOH) in acetone as compared with the corresponding copper complex without a pivalamido group, [(tmpa)Cu(II)](ClO4)2 (2) (tmpa = tris(2-pyridylmethyl)amine). The rate constant (k(obs)) of formation of decamethylferrocenium ion (Fc*(+)) in the catalytic four-electron reduction of O2 by Fc* in the presence of a large excess CF3COOH and O2 obeyed first-order kinetics. The k(obs) value was proportional to the concentration of catalyst 1 or 2, whereas the k(obs) value remained constant irrespective of the concentration of CF3COOH or O2. This indicates that electron transfer from Fc* to 1 or 2 is the rate-determining step in the catalytic cycle of the four-electron reduction of O2 by Fc* in the presence of CF3COOH. The second-order catalytic rate constant (k(cat)) for 1 is 4 times larger than the corresponding value determined for 2. With the pivalamido group in 1 compared to 2, the Cu(II)/Cu(I) potentials are -0.23 and -0.05 V vs SCE, respectively. However, during catalytic turnover, the CF3COO(-) anion present readily binds to 2 shifting the resulting complex's redox potential to -0.35 V. The pivalamido group in 1 is found to inhibit anion binding. The overall effect is to make 1 easier to reduce (relative to 2) during catalysis, accounting for the relative k(cat) values observed. 1 is also an excellent catalyst for the two-electron two-proton reduction of H2O2 to water and is also more efficient than is 2. For both complexes, reaction rates are greater than for the overall four-electron O2-reduction to water, an important asset in the design of catalysts for the latter.
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Affiliation(s)
- Saya Kakuda
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, ALCA (JST), Osaka University, Suita, Osaka 565-0871, Japan
| | - Ryan L. Peterson
- Department of Chemistry, The Johns Hopkins University, Baltimore, MD 21218, USA
| | - Kei Ohkubo
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, ALCA (JST), Osaka University, Suita, Osaka 565-0871, Japan
| | - Kenneth D. Karlin
- Department of Chemistry, The Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
| | - Shunichi Fukuzumi
- Department of Chemistry, The Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
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128
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Mate DM, Gonzalez-Perez D, Kittl R, Ludwig R, Alcalde M. Functional expression of a blood tolerant laccase in Pichia pastoris. BMC Biotechnol 2013; 13:38. [PMID: 23627343 PMCID: PMC3655043 DOI: 10.1186/1472-6750-13-38] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Accepted: 04/24/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Basidiomycete high-redox potential laccases (HRPLs) working in human physiological fluids (pH 7.4, 150 mM NaCl) arise great interest in the engineering of 3D-nanobiodevices for biomedical uses. In two previous reports, we described the directed evolution of a HRPL from basidiomycete PM1 strain CECT 2971: i) to be expressed in an active, soluble and stable form in Saccharomyces cerevisiae, and ii) to be active in human blood. In spite of the fact that S. cerevisiae is suited for the directed evolution of HRPLs, the secretion levels obtained in this host are not high enough for further research and exploitation. Thus, the search for an alternative host to over-express the evolved laccases is mandatory. RESULTS A blood-active laccase (ChU-B mutant) fused to the native/evolved α-factor prepro-leader was cloned under the control of two different promoters (P(AOX1) and P(GAP)) and expressed in Pichia pastoris. The most active construct, which contained the P(AOX1) and the evolved prepro-leader, was fermented in a 42-L fed-batch bioreactor yielding production levels of 43 mg/L. The recombinant laccase was purified to homogeneity and thoroughly characterized. As happened in S. cerevisiae, the laccase produced by P. pastoris presented an extra N-terminal extension (ETEAEF) generated by an alternative processing of the α-factor pro-leader at the Golgi compartment. The laccase mutant secreted by P. pastoris showed the same improved properties acquired after several cycles of directed evolution in S. cerevisiae for blood-tolerance: a characteristic pH-activity profile shifted to the neutral-basic range and a greatly increased resistance against inhibition by halides. Slight biochemical differences between both expression systems were found in glycosylation, thermostability and turnover numbers. CONCLUSIONS The tandem-yeast system based on S. cerevisiae to perform directed evolution and P. pastoris to over-express the evolved laccases constitutes a promising approach for the in vitro evolution and production of these enzymes towards different biocatalytic and bioelectrochemical applications.
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Affiliation(s)
- Diana M Mate
- Department of Biocatalysis, Institute of Catalysis, CSIC, Madrid 28049, Spain
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129
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Stability mechanisms of a thermophilic laccase probed by molecular dynamics. PLoS One 2013; 8:e61985. [PMID: 23658618 PMCID: PMC3639223 DOI: 10.1371/journal.pone.0061985] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Accepted: 03/15/2013] [Indexed: 11/25/2022] Open
Abstract
Laccases are highly stable, industrially important enzymes capable of oxidizing a large range of substrates. Causes for their stability are, as for other proteins, poorly understood. In this work, multiple-seed molecular dynamics (MD) was applied to a Trametes versicolor laccase in response to variable ionic strengths, temperatures, and glycosylation status. Near-physiological conditions provided excellent agreement with the crystal structure (average RMSD ∼0.92 Å) and residual agreement with experimental B-factors. The persistence of backbone hydrogen bonds was identified as a key descriptor of structural response to environment, whereas solvent-accessibility, radius of gyration, and fluctuations were only locally relevant. Backbone hydrogen bonds decreased systematically with temperature in all simulations (∼9 per 50 K), probing structural changes associated with enthalpy-entropy compensation. Approaching Topt (∼350 K) from 300 K, this change correlated with a beginning “unzipping” of critical β-sheets. 0 M ionic strength triggered partial denucleation of the C-terminal (known experimentally to be sensitive) at 400 K, suggesting a general salt stabilization effect. In contrast, F− (but not Cl−) specifically impaired secondary structure by formation of strong hydrogen bonds with backbone NH, providing a mechanism for experimentally observed small anion destabilization, potentially remedied by site-directed mutagenesis at critical intrusion sites. N-glycosylation was found to support structural integrity by increasing persistent backbone hydrogen bonds by ∼4 across simulations, mainly via prevention of F− intrusion. Hydrogen-bond loss in distinct loop regions and ends of critical β-sheets suggest potential strategies for laboratory optimization of these industrially important enzymes.
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130
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Transcriptome analysis of candidate genes and signaling pathways associated with light-induced brown film formation in Lentinula edodes. Appl Microbiol Biotechnol 2013; 97:4977-89. [DOI: 10.1007/s00253-013-4832-y] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 02/27/2013] [Accepted: 03/03/2013] [Indexed: 01/10/2023]
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131
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Torres-Salas P, Mate DM, Ghazi I, Plou FJ, Ballesteros AO, Alcalde M. Widening the pH activity profile of a fungal laccase by directed evolution. Chembiochem 2013; 14:934-7. [PMID: 23592228 DOI: 10.1002/cbic.201300102] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Indexed: 11/07/2022]
Abstract
Unnatural selection: A fungal laccase was tailored by directed evolution to be active at neutral/alkaline pH. After five generations, the final mutant showed a broader pH profile while retaining 50 to 80 % of its activity at neutral pH.
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Affiliation(s)
- Pamela Torres-Salas
- Department of Biocatalysis, Institute of Catalysis, CSIC, Marie Curie St. 2, 28049 Madrid, Spain
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132
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Ng IS, Zhang X, Zhang Y, Lu Y. Molecular cloning and heterologous expression of laccase from Aeromonas hydrophila NIU01 in Escherichia coli with parameters optimization in production. Appl Biochem Biotechnol 2013; 169:2223-35. [PMID: 23423657 DOI: 10.1007/s12010-013-0128-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 01/30/2013] [Indexed: 11/28/2022]
Abstract
Prior studies disclosed that Aeromonas hydrophila NIU01 was a biodecolorization and bioelectricity bacterium which was isolated from a cross-strait of Taiwan. However, enzymatic function, laccase, involved in this strain had never been reported. This first attempt is to explore its laccase activity, the molecular cloning and heterologous recombinant expression in Escherichia coli. A full-length novel gene of 1,647 bp, LacA, encoding of 549 amino acids was successfully cloned by polymerase chain reaction. The recombinant pET-15b(+)-NIU-LacA expression was compared in different E. coli strains. By applying Taguchi's L9 in culture optimization, the soluble laccase increased to 22.7 %, in which the conditions were obtained at 22 °C with initial shaking speed at 200 rpm, addition of lactose of 0.2 mM and CuSO4 of 0.5 mM to the medium, and shaking off while cell mass reached to OD(600nm) of 1.5. NIU-LacA was strongly inhibited by chloride ion. The optimal temperature was 60 °C and the optimum pH for ABTS (2,2'-azino-bis (3-ethylbenzthiazolinesulfonic acid) and 2,6-DMP (2,6-dimethoxyphenol) were pH 2.1 and pH 7.5 which enzymatic activity was 274.6 and 44.8 U/L, respectively. Further study in structural modeling of NIU-LacA showed the C terminal domain was the major variance in the three most closely A. hydrophila strains.
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Affiliation(s)
- I-Son Ng
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
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133
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Tamayo-Ramos JA, van Berkel WJH, de Graaff LH. Biocatalytic potential of laccase-like multicopper oxidases from Aspergillus niger. Microb Cell Fact 2012; 11:165. [PMID: 23270588 PMCID: PMC3548707 DOI: 10.1186/1475-2859-11-165] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Accepted: 12/19/2012] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Laccase-like multicopper oxidases have been reported in several Aspergillus species but they remain uncharacterized. The biocatalytic potential of the Aspergillus niger fungal pigment multicopper oxidases McoA and McoB and ascomycete laccase McoG was investigated. RESULTS The laccase-like multicopper oxidases McoA, McoB and McoG from the commonly used cell factory Aspergillus niger were homologously expressed, purified and analyzed for their biocatalytic potential. All three recombinant enzymes were monomers with apparent molecular masses ranging from 80 to 110 kDa. McoA and McoG resulted to be blue, whereas McoB was yellow. The newly obtained oxidases displayed strongly different activities towards aromatic compounds and synthetic dyes. McoB exhibited high catalytic efficiency with N,N-dimethyl-p-phenylenediamine (DMPPDA) and 2,2-azino-di(3-ethylbenzthiazoline) sulfonic acid (ABTS), and appeared to be a promising biocatalyst. Besides oxidizing a variety of phenolic compounds, McoB catalyzed successfully the decolorization and detoxification of the widely used textile dye malachite green. CONCLUSIONS The A. niger McoA, McoB, and McoG enzymes showed clearly different catalytic properties. Yellow McoB showed broad substrate specificity, catalyzing the oxidation of several phenolic compounds commonly present in different industrial effluents. It also harbored high decolorization and detoxification activity with the synthetic dye malachite green, showing to have an interesting potential as a new industrial biocatalyst.
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Affiliation(s)
- Juan Antonio Tamayo-Ramos
- Microbial Systems Biology, Laboratory of Systems and Synthetic Biology, Wageningen University, Dreijenplein 10, Wageningen, 6703 HB, The Netherlands
| | - Willem JH van Berkel
- Laboratory of Biochemistry, Wageningen University, Dreijenlaan 3, Wageningen, 6703 HA, The Netherlands
| | - Leo H de Graaff
- Microbial Systems Biology, Laboratory of Systems and Synthetic Biology, Wageningen University, Dreijenplein 10, Wageningen, 6703 HB, The Netherlands
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134
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Mot AC, Silaghi-Dumitrescu R. Laccases: Complex architectures for one-electron oxidations. BIOCHEMISTRY (MOSCOW) 2012; 77:1395-407. [DOI: 10.1134/s0006297912120085] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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135
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Mate DM, Garcia-Ruiz E, Camarero S, Shubin VV, Falk M, Shleev S, Ballesteros AO, Alcalde M. Switching from blue to yellow: altering the spectral properties of a high redox potential laccase by directed evolution. BIOCATAL BIOTRANSFOR 2012. [DOI: 10.3109/10242422.2012.749463] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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136
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Betancor L, Johnson GR, Luckarift HR. Stabilized Laccases as Heterogeneous Bioelectrocatalysts. ChemCatChem 2012. [DOI: 10.1002/cctc.201200611] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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137
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Díaz-Rodríguez A, Lavandera I, Kanbak-Aksu S, Sheldon RA, Gotor V, Gotor-Fernández V. From Diols to Lactones under Aerobic Conditions using a Laccase/TEMPO Catalytic System in Aqueous Medium. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200892] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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138
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Navarra C, Gavezzotti P, Monti D, Panzeri W, Riva S. Biocatalyzed synthesis of enantiomerically enriched β-5-like dimer of 4-vinylphenol. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcatb.2012.03.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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139
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Design-of-experiment strategy for the formulation of laccase biocatalysts and their application to degrade bisphenol A. N Biotechnol 2012; 30:96-103. [DOI: 10.1016/j.nbt.2012.05.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 05/20/2012] [Accepted: 05/25/2012] [Indexed: 11/30/2022]
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140
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A laccase with antiproliferative and HIV-I reverse transcriptase inhibitory activities from the mycorrhizal fungus Agaricus placomyces. J Biomed Biotechnol 2012; 2012:736472. [PMID: 23093860 PMCID: PMC3471028 DOI: 10.1155/2012/736472] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2012] [Revised: 08/02/2012] [Accepted: 08/08/2012] [Indexed: 12/02/2022] Open
Abstract
A novel 68 kDa laccase was purified from the mycorrhizal fungus Agaricus placomyces by utilizing a procedure that comprised three successive steps of ion exchange chromatography and gel filtration as the final step. The monomeric enzyme exhibited the N-terminal amino acid sequence of DVIGPQAQVTLANQD, which showed only a low extent of homology to sequences of other fungal laccases. The optimal temperature for A. placomyces laccase was 30°C, and optimal pH values for laccase activity towards the substrates 2,7′-azinobis[3-ethylbenzothiazolone-6-sulfonic acid] diammonium salt (ABTS) and hydroquinone were 5.2 and 6.8, respectively. The laccase displayed, at 30°C and pH 5.2, Km values of 0.392 mM towards hydroquinone and 0.775 mM towards ABTS. It potently suppressed proliferation of MCF 7 human breast cancer cells and Hep G2 hepatoma cells and inhibited human immunodeficiency virus type 1 (HIV-1) reverse transcriptase (RT) activity with an IC50 of 1.8 μM, 1.7 μM, and 1.25 μM, respectively, signifying that it is an antipathogenic protein.
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141
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Tamayo-Ramos JA, Barends S, de Lange D, de Jel A, Verhaert R, de Graaff L. Enhanced production ofAspergillus nigerlaccase-like multicopper oxidases through mRNA optimization of the glucoamylase expression system. Biotechnol Bioeng 2012; 110:543-51. [DOI: 10.1002/bit.24723] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 08/14/2012] [Accepted: 08/17/2012] [Indexed: 02/03/2023]
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142
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Demarche P, Junghanns C, Nair RR, Agathos SN. Harnessing the power of enzymes for environmental stewardship. Biotechnol Adv 2012; 30:933-53. [DOI: 10.1016/j.biotechadv.2011.05.013] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Accepted: 05/13/2011] [Indexed: 11/17/2022]
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143
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144
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Production of recombinant proteins by filamentous fungi. Biotechnol Adv 2012; 30:1119-39. [DOI: 10.1016/j.biotechadv.2011.09.012] [Citation(s) in RCA: 164] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 08/30/2011] [Accepted: 09/15/2011] [Indexed: 11/17/2022]
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145
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Sheikhi F, Roayaei Ardakani M, Enayatizamir N, Rodriguez-Couto S. The Determination of Assay for Laccase of Bacillus subtilis WPI with Two Classes of Chemical Compounds as Substrates. Indian J Microbiol 2012; 52:701-7. [PMID: 24293734 DOI: 10.1007/s12088-012-0298-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Accepted: 08/09/2012] [Indexed: 11/30/2022] Open
Abstract
Ligninolytic enzyme complexes are involved in lignin degradation. Among them laccases are outstanding because they use molecular oxygen as a co-substrate instead of hydrogen peroxide as used by peroxidases. Bacterial laccase of Bacillus genus was first reported in Claus and Filip (Microbiol Res 152:209-216, 1997), since then more bacterial laccases have been found. In this research, laccase-producing bacteria were screened from pulp and paper industry wastewater, bagass and sugarcane rhizosphere. Nutrient agar medium containing 0.5 mM of guaiacol was used. It was observed that the laccase-producing strains developed brown colour from which 16 strains of Bacillus were identified. One of the isolated strains was identified as Bacillus subtilis WPI based on the results of biochemical tests and 16S rDNA sequence analysis. This strain showed laccase-like activity towards the oxidizing substrates ABTS and guaiacol. In this study guaiacol was used as the substrate of laccase activity assay. For determination of laccase activity of this isolate guaiacol was used as a substrate of assay for the first time in this study. SDS-PAGE and Native-PAGE confirmed the presence of laccase.
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Affiliation(s)
- Fatemeh Sheikhi
- Department of Biology, Faculty of Science, University of Shahid Chamran, Ahvaz, Iran
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146
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Guazzaroni M, Bozzini T, Saladino R. Synthesis of Aldehydes by Layer-by-Layer Immobilized Laccases in the Presence of Redox Mediators. ChemCatChem 2012. [DOI: 10.1002/cctc.201200330] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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147
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Pardo I, Vicente AI, Mate DM, Alcalde M, Camarero S. Development of chimeric laccases by directed evolution. Biotechnol Bioeng 2012; 109:2978-86. [PMID: 22729887 DOI: 10.1002/bit.24588] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Revised: 04/26/2012] [Accepted: 06/11/2012] [Indexed: 11/07/2022]
Abstract
DNA recombination methods are useful tools to generate diversity in directed evolution protein engineering studies. We have designed an array of chimeric laccases with high-redox potential by in vitro and in vivo DNA recombination of two fungal laccases (from Pycnoporus cinnabarinus and PM1 basidiomycete), which were previously tailored by laboratory evolution for functional expression in Saccharomyces cerevisiae. The laccase fusion genes (including the evolved α-factor prepro-leaders for secretion in yeast) were subjected to a round of family shuffling to construct chimeric libraries and the best laccase hybrids were identified in dual high-throughput screening (HTS) assays. Using this approach, we identified chimeras with up to six crossover events in the whole sequence, and we obtained active hybrid laccases with combined characteristics in terms of pH activity and thermostability.
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Affiliation(s)
- Isabel Pardo
- Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain
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148
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Chirivì C, Fontana G, Monti D, Ottolina G, Riva S, Danieli B. The Quest for New Mild and Selective Modifications of Natural Structures: Laccase-Catalysed Oxidation of Ergot Alkaloids Leads to Unexpected Stereoselective C-4 Hydroxylation. Chemistry 2012; 18:10355-61. [DOI: 10.1002/chem.201201076] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Indexed: 11/06/2022]
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149
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Cambria MT, Gullotto D, Garavaglia S, Cambria A. In silico study of structural determinants modulating the redox potential ofRigidoporus lignosusand other fungal laccases. J Biomol Struct Dyn 2012; 30:89-101. [DOI: 10.1080/07391102.2012.674275] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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150
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Erjavec J, Kos J, Ravnikar M, Dreo T, Sabotič J. Proteins of higher fungi – from forest to application. Trends Biotechnol 2012; 30:259-73. [DOI: 10.1016/j.tibtech.2012.01.004] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 01/17/2012] [Accepted: 01/17/2012] [Indexed: 12/27/2022]
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