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Patsch D, Eichenberger M, Voss M, Bornscheuer UT, Buller RM. LibGENiE - A bioinformatic pipeline for the design of information-enriched enzyme libraries. Comput Struct Biotechnol J 2023; 21:4488-4496. [PMID: 37736300 PMCID: PMC10510078 DOI: 10.1016/j.csbj.2023.09.013] [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: 06/02/2023] [Revised: 09/13/2023] [Accepted: 09/13/2023] [Indexed: 09/23/2023] Open
Abstract
Enzymes are potent catalysts with high specificity and selectivity. To leverage nature's synthetic potential for industrial applications, various protein engineering techniques have emerged which allow to tailor the catalytic, biophysical, and molecular recognition properties of enzymes. However, the many possible ways a protein can be altered forces researchers to carefully balance between the exhaustiveness of an enzyme screening campaign and the required resources. Consequently, the optimal engineering strategy is often defined on a case-by-case basis. Strikingly, while predicting mutations that lead to an improved target function is challenging, here we show that the prediction and exclusion of deleterious mutations is a much more straightforward task as analyzed for an engineered carbonic acid anhydrase, a transaminase, a squalene-hopene cyclase and a Kemp eliminase. Combining such a pre-selection of allowed residues with advanced gene synthesis methods opens a path toward an efficient and generalizable library construction approach for protein engineering. To give researchers easy access to this methodology, we provide the website LibGENiE containing the bioinformatic tools for the library design workflow.
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Affiliation(s)
- David Patsch
- Zurich University of Applied Sciences, School of Life Sciences and Facility Management, Institute of Chemistry and Biotechnology, Einsiedlerstrasse 31, 8820 Wädenswil, Switzerland
- Institute of Biochemistry, Department of Biotechnology & Enzyme Catalysis, Greifswald University, Felix-Hausdorff-Strasse 4, 17487 Greifswald, Germany
| | - Michael Eichenberger
- Zurich University of Applied Sciences, School of Life Sciences and Facility Management, Institute of Chemistry and Biotechnology, Einsiedlerstrasse 31, 8820 Wädenswil, Switzerland
| | - Moritz Voss
- Zurich University of Applied Sciences, School of Life Sciences and Facility Management, Institute of Chemistry and Biotechnology, Einsiedlerstrasse 31, 8820 Wädenswil, Switzerland
| | - Uwe T. Bornscheuer
- Institute of Biochemistry, Department of Biotechnology & Enzyme Catalysis, Greifswald University, Felix-Hausdorff-Strasse 4, 17487 Greifswald, Germany
| | - Rebecca M. Buller
- Zurich University of Applied Sciences, School of Life Sciences and Facility Management, Institute of Chemistry and Biotechnology, Einsiedlerstrasse 31, 8820 Wädenswil, Switzerland
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2
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Engineering the 2-Oxoglutarate Dehydrogenase Complex to Understand Catalysis and Alter Substrate Recognition. REACTIONS 2022. [DOI: 10.3390/reactions3010011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The E. coli 2-oxoglutarate dehydrogenase complex (OGDHc) is a multienzyme complex in the tricarboxylic acid cycle, consisting of multiple copies of three components, 2-oxoglutarate dehydrogenase (E1o), dihydrolipoamide succinyltransferase (E2o) and dihydrolipoamide dehydrogenase (E3), which catalyze the formation of succinyl-CoA and NADH (+H+) from 2-oxoglutarate. This review summarizes applications of the site saturation mutagenesis (SSM) to engineer E. coli OGDHc with mechanistic and chemoenzymatic synthetic goals. First, E1o was engineered by creating SSM libraries at positions His260 and His298.Variants were identified that: (a) lead to acceptance of substrate analogues lacking the 5-carboxyl group and (b) performed carboligation reactions producing acetoin-like compounds with good enantioselectivity. Engineering the E2o catalytic (core) domain enabled (a) assignment of roles for pivotal residues involved in catalysis, (b) re-construction of the substrate-binding pocket to accept substrates other than succinyllysyldihydrolipoamide and (c) elucidation of the mechanism of trans-thioesterification to involve stabilization of a tetrahedral oxyanionic intermediate with hydrogen bonds by His375 and Asp374, rather than general acid–base catalysis which has been misunderstood for decades. The E. coli OGDHc is the first example of a 2-oxo acid dehydrogenase complex which was evolved to a 2-oxo aliphatic acid dehydrogenase complex by engineering two consecutive E1o and E2o components.
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3
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Maldonado MR, Alnoch RC, de Almeida JM, Santos LAD, Andretta AT, Ropaín RDPC, de Souza EM, Mitchell DA, Krieger N. Key mutation sites for improvement of the enantioselectivity of lipases through protein engineering. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2021.108047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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4
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Shukla V, Runthala A, Rajput VS, Chandrasai PD, Tripathi A, Phulara SC. Computational and synthetic biology approaches for the biosynthesis of antiviral and anticancer terpenoids from Bacillus subtilis. Med Chem 2021; 18:307-322. [PMID: 34254925 DOI: 10.2174/1573406417666210712211557] [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: 10/09/2020] [Revised: 04/18/2021] [Accepted: 04/25/2021] [Indexed: 11/22/2022]
Abstract
Recent advancements in medicinal research have identified several antiviral and anticancer terpenoids that are usually deployed as a source of flavor, fragrances and pharmaceuticals. Under the current COVID-19 pandemic conditions, natural therapeutics with least side effects are the need of the hour to save the patients, especially, which are pre-affected with other medical complications. Although, plants are the major sources of terpenoids; however, for the environmental concerns, the global interest has shifted to the biocatalytic production of molecules from microbial sources. The gram-positive bacterium Bacillus subtilis is a suitable host in this regard due to its GRAS (generally regarded as safe) status, ease in genetic manipulations and wide industrial acceptability. The B. subtilis synthesizes its terpenoid molecules from 1-deoxy-d-xylulose-5-phosphate (DXP) pathway, a common route in almost all microbial strains. Here, we summarize the computational and synthetic biology approaches to improve the production of terpenoid-based therapeutics from B. subtilis by utilizing DXP pathway. We focus on the in-silico approaches for screening the functionally improved enzyme-variants of the two crucial enzymes namely, the DXP synthase (DXS) and farnesyl pyrophosphate synthase (FPPS). The approaches for engineering the active sites are subsequently explained. It will be helpful to construct the functionally improved enzymes for the high-yield production of terpenoid-based anticancer and antiviral metabolites, which would help to reduce the cost and improve the availability of such therapeutics for the humankind.
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Affiliation(s)
- Vibha Shukla
- Food, Drug and Chemical Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31 Mahatma Gandhi Marg, Lucknow-226001, India
| | - Ashish Runthala
- Department of Biotechnology, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur-522502, Andhra Pradesh, India
| | | | - Potla Durthi Chandrasai
- Department of Biotechnology, National Institute of Technology Warangal, Warangal-506004, Telangana, India
| | - Anurag Tripathi
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Suresh Chandra Phulara
- Department of Biotechnology, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur-522502, Andhra Pradesh, India
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5
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Yi S, Park S. Enhancing enantioselectivity of Candida antarctica lipase B towards chiral sec-alcohols bearing small substituents through hijacking sequence of A homolog. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153186] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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6
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Cea-Rama I, Coscolín C, Katsonis P, Bargiela R, Golyshin PN, Lichtarge O, Ferrer M, Sanz-Aparicio J. Structure and evolutionary trace-assisted screening of a residue swapping the substrate ambiguity and chiral specificity in an esterase. Comput Struct Biotechnol J 2021; 19:2307-2317. [PMID: 33995922 PMCID: PMC8105184 DOI: 10.1016/j.csbj.2021.04.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 04/15/2021] [Accepted: 04/16/2021] [Indexed: 01/02/2023] Open
Abstract
Our understanding of enzymes with high substrate ambiguity remains limited because their large active sites allow substrate docking freedom to an extent that seems incompatible with stereospecificity. One possibility is that some of these enzymes evolved a set of evolutionarily fitted sequence positions that stringently allow switching substrate ambiguity and chiral specificity. To explore this hypothesis, we targeted for mutation a serine ester hydrolase (EH3) that exhibits an impressive 71-substrate repertoire but is not stereospecific (e.e. 50%). We used structural actions and the computational evolutionary trace method to explore specificity-swapping sequence positions and hypothesized that position I244 was critical. Driven by evolutionary action analysis, this position was substituted to leucine, which together with isoleucine appears to be the amino acid most commonly present in the closest homologous sequences (max. identity, ca. 67.1%), and to phenylalanine, which appears in distant homologues. While the I244L mutation did not have any functional consequences, the I244F mutation allowed the esterase to maintain a remarkable 53-substrate range while gaining stereospecificity properties (e.e. 99.99%). These data support the possibility that some enzymes evolve sequence positions that control the substrate scope and stereospecificity. Such residues, which can be evolutionarily screened, may serve as starting points for further designing substrate-ambiguous, yet chiral-specific, enzymes that are greatly appreciated in biotechnology and synthetic chemistry.
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Affiliation(s)
- Isabel Cea-Rama
- Institute of Physical Chemistry “Rocasolano”, CSIC, 28006 Madrid, Spain
| | | | | | - Rafael Bargiela
- Centre for Environmental Biotechnology, Bangor University, LL57 2UW Bangor, UK
| | - Peter N. Golyshin
- Centre for Environmental Biotechnology, Bangor University, LL57 2UW Bangor, UK
- School of Natural Sciences, Bangor University, LL57 2UW Bangor, UK
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7
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Liu X, Zhao M, Fan X, Fu Y. Reshaping the active pocket of esterase Est816 for resolution of economically important racemates. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01028j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Eight 2-arylpropionic acids with high E values were generated by engineered Est816, which overcomes the contradiction between the wide substrate scope and high enantioselectivity of esterases.
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Affiliation(s)
- Xiaolong Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, iChEM, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Meng Zhao
- School of Basic Medical Sciences, Anhui Medical University, 81 Meishan Rd, Hefei, 230032, Anhui, People's Republic of China
| | - Xinjiong Fan
- School of Basic Medical Sciences, Anhui Medical University, 81 Meishan Rd, Hefei, 230032, Anhui, People's Republic of China
| | - Yao Fu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, iChEM, University of Science and Technology of China, Hefei, Anhui 230026, China
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8
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Zou Z, Nöth M, Jakob F, Schwaneberg U. Designed Streptococcus pyogenes Sortase A Accepts Branched Amines as Nucleophiles in Sortagging. Bioconjug Chem 2020; 31:2476-2481. [DOI: 10.1021/acs.bioconjchem.0c00486] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhi Zou
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany
- DWI − Leibniz-Institute for Interactive Materials, Forckenbeckstraβe 50, 52074 Aachen, Germany
| | - Maximilian Nöth
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany
- DWI − Leibniz-Institute for Interactive Materials, Forckenbeckstraβe 50, 52074 Aachen, Germany
| | - Felix Jakob
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany
- DWI − Leibniz-Institute for Interactive Materials, Forckenbeckstraβe 50, 52074 Aachen, Germany
| | - Ulrich Schwaneberg
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, 52074 Aachen, Germany
- DWI − Leibniz-Institute for Interactive Materials, Forckenbeckstraβe 50, 52074 Aachen, Germany
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9
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Drienovská I, Gajdoš M, Kindler A, Takhtehchian M, Darnhofer B, Birner-Gruenberger R, Dörr M, Bornscheuer UT, Kourist R. Folding Assessment of Incorporation of Noncanonical Amino Acids Facilitates Expansion of Functional-Group Diversity for Enzyme Engineering. Chemistry 2020; 26:12338-12342. [PMID: 32347609 PMCID: PMC7590180 DOI: 10.1002/chem.202002077] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Indexed: 12/31/2022]
Abstract
Protein design is limited by the diversity of functional groups provided by the canonical protein „building blocks“. Incorporating noncanonical amino acids (ncAAs) into enzymes enables a dramatic expansion of their catalytic features. For this, quick identification of fully translated and correctly folded variants is decisive. Herein, we report the engineering of the enantioselectivity of an esterase utilizing several ncAAs. Key for the identification of active and soluble protein variants was the use of the split‐GFP method, which is crucial as it allows simple determination of the expression levels of enzyme variants with ncAA incorporations by fluorescence. Several identified variants led to improved enantioselectivity or even inverted enantiopreference in the kinetic resolution of ethyl 3‐phenylbutyrate.
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Affiliation(s)
- Ivana Drienovská
- Institute of Molecular Biotechnology, Graz University of Technology, Petersgasse 14, 8010, Graz, Austria
| | - Matúš Gajdoš
- Institute of Molecular Biotechnology, Graz University of Technology, Petersgasse 14, 8010, Graz, Austria
| | - Alexia Kindler
- Institute of Molecular Biotechnology, Graz University of Technology, Petersgasse 14, 8010, Graz, Austria
| | - Mahsa Takhtehchian
- Institute of Molecular Biotechnology, Graz University of Technology, Petersgasse 14, 8010, Graz, Austria
| | - Barbara Darnhofer
- Diagnostic and Research Institute of Patholoy, Diagnostic and Research Center of Molecular Medicine, Medical University of Graz, Neue Stiftingtalstraße 6, 8010, Graz, Austria.,Omics Center Graz, BioTechMed-Graz, Stiftingtalstraße 24, 8010, Graz, Austria
| | - Ruth Birner-Gruenberger
- Diagnostic and Research Institute of Patholoy, Diagnostic and Research Center of Molecular Medicine, Medical University of Graz, Neue Stiftingtalstraße 6, 8010, Graz, Austria.,Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164, 1060, Wien, Austria.,Omics Center Graz, BioTechMed-Graz, Stiftingtalstraße 24, 8010, Graz, Austria
| | - Mark Dörr
- Biotechnology & Enzyme Catalysis, Institute of Biochemistry, Greifswald University, Felix-Hausdorff-Str. 4, 17487, Greifswald, Germany
| | - Uwe T Bornscheuer
- Biotechnology & Enzyme Catalysis, Institute of Biochemistry, Greifswald University, Felix-Hausdorff-Str. 4, 17487, Greifswald, Germany
| | - Robert Kourist
- Institute of Molecular Biotechnology, Graz University of Technology, Petersgasse 14, 8010, Graz, Austria
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10
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Nshimiyimana P, Liu L, Du G. Engineering of L-amino acid deaminases for the production of α-keto acids from L-amino acids. Bioengineered 2019; 10:43-51. [PMID: 30876377 PMCID: PMC6527072 DOI: 10.1080/21655979.2019.1595990] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 03/10/2019] [Accepted: 03/12/2019] [Indexed: 10/27/2022] Open
Abstract
α-keto acids are organic compounds that contain an acid group and a ketone group. L-amino acid deaminases are enzymes that catalyze the oxidative deamination of amino acids for the formation of their corresponding α-keto acids and ammonia. α-keto acids are synthesized industrially via chemical processes that are costly and use harsh chemicals. The use of the directed evolution technique, followed by the screening and selection of desirable variants, to evolve enzymes has proven to be an effective way to engineer enzymes with improved performance. This review presents recent studies in which the directed evolution technique was used to evolve enzymes, with an emphasis on L-amino acid deaminases for the whole-cell biocatalysts production of α-keto acids from their corresponding L-amino acids. We discuss and highlight recent cases where the engineered L-amino acid deaminases resulted in an improved production yield of phenylpyruvic acid, α-ketoisocaproate, α-ketoisovaleric acid, α-ketoglutaric acid, α-keto-γ-methylthiobutyric acid, and pyruvate.
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Affiliation(s)
- Project Nshimiyimana
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
| | - Long Liu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
| | - Guocheng Du
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
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11
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Lu Q, Qiu L, Yu L, Zhang S, de Toledo RA, Shim H, Wang S. Microbial transformation of chiral organohalides: Distribution, microorganisms and mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2019; 368:849-861. [PMID: 30772625 DOI: 10.1016/j.jhazmat.2019.01.103] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 01/29/2019] [Accepted: 01/30/2019] [Indexed: 05/27/2023]
Abstract
Chiral organohalides including dichlorodiphenyltrichloroethane (DDT), Hexabromocyclododecane (HBCD) and polychlorinated biphenyls (PCBs) raise a significant concern in the environmental occurrence, fate and ecotoxicology due to their enantioselective biological effects. This review provides a state-of-the-art overview on enantioselective microbial transformation of the chiral organohalides. We firstly summarized worldwide field assessments of chiral organohalides in a variety of environmental matrices, which suggested the pivotal role of microorganisms in enantioselective transformation of chiral organohalides. Then, laboratory studies provided experimental evidences to further link enantioselective attenuation of chiral organohalides to specific functional microorganisms and enzymes, revealing mechanistic insights into the enantioselective microbial transformation processes. Particularly, a few amino acid residues in the functional enzymes could play a key role in mediating the enantioselectivity at the molecular level. Finally, major challenges and further developments toward an in-depth understanding of the enantioselective microbial transformation of chiral organohalides are identified and discussed.
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Affiliation(s)
- Qihong Lu
- School of Environmental Science and Engineering, Sun Yat-Sen University, 510275 Guangzhou, China; Environmental Microbiome Research Center, Sun Yat-Sen University, 510275 Guangzhou, China
| | - Lan Qiu
- School of Environmental Science and Engineering, Sun Yat-Sen University, 510275 Guangzhou, China
| | - Ling Yu
- School of Environmental Science and Engineering, Sun Yat-Sen University, 510275 Guangzhou, China; Environmental Microbiome Research Center, Sun Yat-Sen University, 510275 Guangzhou, China
| | - Shangwei Zhang
- UFZ Department of Ecological Chemistry, Helmholtz Centre for Environmental Research, Permoserstraße 15, 04318 Leipzig, Germany
| | - Renata Alves de Toledo
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, 999078 Macau SAR, China
| | - Hojae Shim
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, 999078 Macau SAR, China
| | - Shanquan Wang
- School of Environmental Science and Engineering, Sun Yat-Sen University, 510275 Guangzhou, China; Environmental Microbiome Research Center, Sun Yat-Sen University, 510275 Guangzhou, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, 510275 Guangzhou, China.
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12
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van den Bergh T, Tamo G, Nobili A, Tao Y, Tan T, Bornscheuer UT, Kuipers RKP, Vroling B, de Jong RM, Subramanian K, Schaap PJ, Desmet T, Nidetzky B, Vriend G, Joosten HJ. CorNet: Assigning function to networks of co-evolving residues by automated literature mining. PLoS One 2017; 12:e0176427. [PMID: 28545124 PMCID: PMC5436653 DOI: 10.1371/journal.pone.0176427] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Accepted: 12/12/2016] [Indexed: 12/30/2022] Open
Abstract
CorNet is a web-based tool for the analysis of co-evolving residue positions in protein super-family sequence alignments. CorNet projects external information such as mutation data extracted from literature on interactively displayed groups of co-evolving residue positions to shed light on the functions associated with these groups and the residues in them. We used CorNet to analyse six enzyme super-families and found that groups of strongly co-evolving residues tend to consist of residues involved in a same function such as activity, specificity, co-factor binding, or enantioselectivity. This finding allows to assign a function to residues for which no data is available yet in the literature. A mutant library was designed to mutate residues observed in a group of co-evolving residues predicted to be involved in enantioselectivity, but for which no literature data is available yet. The resulting set of mutations indeed showed many instances of increased enantioselectivity.
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Affiliation(s)
- Tom van den Bergh
- Bio-Prodict, Nijmegen, The Netherlands
- Laboratory of Systems and Synthetic Biology, Wageningen University, Wageningen, The Netherlands
| | | | - Alberto Nobili
- Institute of Biochemistry, Department of Biotechnology & Enzyme Catalysis, Greifswald University, Greifswald, Germany
| | - Yifeng Tao
- Institute of Biochemistry, Department of Biotechnology & Enzyme Catalysis, Greifswald University, Greifswald, Germany
- Beijing Key Lab of Bioprocess, Beijing University of Chemical Technology, Chaoyang, Beijing, China
| | - Tianwei Tan
- Beijing Key Lab of Bioprocess, Beijing University of Chemical Technology, Chaoyang, Beijing, China
| | - Uwe T. Bornscheuer
- Institute of Biochemistry, Department of Biotechnology & Enzyme Catalysis, Greifswald University, Greifswald, Germany
| | | | | | | | | | - Peter J. Schaap
- Laboratory of Systems and Synthetic Biology, Wageningen University, Wageningen, The Netherlands
| | - Tom Desmet
- Centre for Industrial Biotechnology and Biocatalysis, Ghent University, Ghent, Belgium
| | - Bernd Nidetzky
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, Graz, Austria
| | | | - Henk-Jan Joosten
- Bio-Prodict, Nijmegen, The Netherlands
- CMBI, Radboudumc, Nijmegen, The Netherlands
- * E-mail:
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13
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Ozaki M, Kawakami N, Ohta H, Miyamoto K. Improved enantioselectivity of thermostable esterase ST0071 from archaeon Sulfolobus tokodaii by site-saturation mutagenesis. BIOCATAL BIOTRANSFOR 2016. [DOI: 10.1080/10242422.2016.1247823] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Masanaru Ozaki
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Yokohama, Kanagawa, Japan
| | - Norifumi Kawakami
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Yokohama, Kanagawa, Japan
| | - Hiromichi Ohta
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Yokohama, Kanagawa, Japan
| | - Kenji Miyamoto
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Yokohama, Kanagawa, Japan
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14
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Facile modulation of enantioselectivity of thermophilic Geobacillus zalihae lipase by regulating hydrophobicity of its Q114 oxyanion. Enzyme Microb Technol 2016; 93-94:174-181. [DOI: 10.1016/j.enzmictec.2016.08.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 08/20/2016] [Accepted: 08/30/2016] [Indexed: 01/04/2023]
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15
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Luo XJ, Zhao J, Li CX, Bai YP, Reetz MT, Yu HL, Xu JH. Combinatorial evolution of phosphotriesterase toward a robust malathion degrader by hierarchical iteration mutagenesis. Biotechnol Bioeng 2016; 113:2350-7. [DOI: 10.1002/bit.26012] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 05/12/2016] [Accepted: 05/15/2016] [Indexed: 01/24/2023]
Affiliation(s)
- Xiao-Jing Luo
- State Key Laboratory of Bioreactor Engineering; Shanghai Collaborative Innovation Center for Biomanufacturing; East China University of Science and Technology; Shanghai 200237 China
| | - Jian Zhao
- State Key Laboratory of Bioreactor Engineering; Shanghai Collaborative Innovation Center for Biomanufacturing; East China University of Science and Technology; Shanghai 200237 China
| | - Chun-Xiu Li
- State Key Laboratory of Bioreactor Engineering; Shanghai Collaborative Innovation Center for Biomanufacturing; East China University of Science and Technology; Shanghai 200237 China
| | - Yun-Peng Bai
- State Key Laboratory of Bioreactor Engineering; Shanghai Collaborative Innovation Center for Biomanufacturing; East China University of Science and Technology; Shanghai 200237 China
| | - Manfred T. Reetz
- Max-Planck-Institut für Kohlenforschung; Mülheim an der Ruhr Germany
- Fachbereich Chemie; Philipps-Universität Marburg; Marburg Germany
| | - Hui-Lei Yu
- State Key Laboratory of Bioreactor Engineering; Shanghai Collaborative Innovation Center for Biomanufacturing; East China University of Science and Technology; Shanghai 200237 China
| | - Jian-He Xu
- State Key Laboratory of Bioreactor Engineering; Shanghai Collaborative Innovation Center for Biomanufacturing; East China University of Science and Technology; Shanghai 200237 China
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16
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Hossain GS, Shin HD, Li J, Wang M, Du G, Liu L, Chen J. Integrating error-prone PCR and DNA shuffling as an effective molecular evolution strategy for the production of α-ketoglutaric acid byl-amino acid deaminase. RSC Adv 2016. [DOI: 10.1039/c6ra02940j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
l-Amino acid deaminases (LAADs; EC 1.4.3.2) belong to a family of amino acid dehydrogenases that catalyze the formation of α-keto acids froml-amino acids.
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Affiliation(s)
- Gazi Sakir Hossain
- School of Food Science and Technology
- Jiangnan University
- Wuxi 214122
- China
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
| | - Hyun-dong Shin
- School of Chemical and Biomolecular Engineering
- Georgia Institute of Technology
- Atlanta
- USA
| | - Jianghua Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi 214122
- China
| | - Miao Wang
- School of Food Science and Technology
- Jiangnan University
- Wuxi 214122
- China
| | - Guocheng Du
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi 214122
- China
| | - Long Liu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi 214122
- China
| | - Jian Chen
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- Jiangnan University
- Wuxi 214122
- China
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17
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Sun H, Wang H, Gao W, Chen L, Wu K, Wei D. Directed evolution of nitrilase PpL19 from Pseudomonas psychrotolerans L19 and identification of enantiocomplementary mutants toward mandelonitrile. Biochem Biophys Res Commun 2015; 468:820-5. [PMID: 26577409 DOI: 10.1016/j.bbrc.2015.11.038] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 11/07/2015] [Indexed: 10/22/2022]
Abstract
Nitrilase PpL19 from Pseudomonas psychrotolerans L19 can hydrolyze racemic mandelonitrile to (S)-mandelic acid with an enantiomeric excess (ee) value of 52.7%. In this study, random mutagenesis combined with site-directed mutagenesis was performed to identify the key residues responsible for nitrilase enantioselectivity. Five enzyme mutants exhibiting distinct selectivity were generated and four "hot spots" (M113, R128, A136, and I168) responsible for enantioselectivity toward mandelonitrile were identified and characterized. Furthermore, through saturation mutagenesis, positions 113 and 128 were confirmed to substantially influence the enantioselectivity of PpL19, and certain replacements of the methionine at position 113, in particular, were found to reverse the enantioselectivity of PpL19 from S- to R-selectivity. Two other single mutants of the enzyme, PpL19-A136Y and -I168Y, also showed reversed selectivity and preferentially produced (R)-mandelic acid (ee values: 66.7% and 74.3%, respectively). By combining the beneficial mutations, two enantiocomplementary nitrilase mutants, PpL19-LH and PpL19-GYY, were created, which exhibited high S- and R-selectivity toward mandelonitrile, respectively: PpL19-LH showed the highest S-selectivity toward mandelonitrile ever reported (91.1% ee), and, notably, the PpL19-GYY mutant was identified to be highly R-selective (90.1% ee) and thus an unexpected enantiocomplementary mutant for mandelonitrile.
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Affiliation(s)
- Huihui Sun
- State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai 200237, PR China
| | - Hualei Wang
- State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai 200237, PR China.
| | - Wenyuan Gao
- State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai 200237, PR China
| | - Lifeng Chen
- State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai 200237, PR China
| | - Kai Wu
- State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai 200237, PR China
| | - Dongzhi Wei
- State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai 200237, PR China.
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18
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Kumari I, Chaudhary N, Sandhu P, Ahmed M, Akhter Y. Structural and mechanistic analysis of engineered trichodiene synthase enzymes from Trichoderma harzianum: towards higher catalytic activities empowering sustainable agriculture. J Biomol Struct Dyn 2015. [PMID: 26207800 DOI: 10.1080/07391102.2015.1073632] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Trichoderma spp. are well-known bioagents for the plant growth promotion and pathogen suppression. The beneficial activities of the fungus Trichoderma spp. are attributed to their ability to produce and secrete certain secondary metabolites such as trichodermin that belongs to trichothecene family of molecules. The initial steps of trichodermin biosynthetic pathway in Trichoderma are similar to the trichothecenes from Fusarium sporotrichioides. Trichodiene synthase (TS) encoded by tri5 gene in Trichoderma catalyses the conversion of farnesyl pyrophosphate to trichodiene as reported earlier. In this study, we have carried out a comprehensive comparative sequence and structural analysis of the TS, which revealed the conserved residues involved in catalytic activity of the protein. In silico, modelled tertiary structure of TS protein showed stable structural behaviour during simulations. Two single-substitution mutants, i.e. D109E, D248Y and one double-substitution mutant (D109E and D248Y) of TS with potentially higher activities are screened out. The mutant proteins showed more stability than the wild type, an increased number of electrostatic interactions and better binding energies with the ligand, which further elucidates the amino acid residues involved in the reaction mechanism. These results will lead to devise strategies for higher TS activity to ultimately enhance the trichodermin production by Trichoderma spp. for its better exploitation in the sustainable agricultural practices.
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Affiliation(s)
- Indu Kumari
- a School of Earth and Environmental Sciences, Central University of Himachal Pradesh , District-Kangra, Shahpur , Himachal Pradesh 176206 , India
| | - Nitika Chaudhary
- a School of Earth and Environmental Sciences, Central University of Himachal Pradesh , District-Kangra, Shahpur , Himachal Pradesh 176206 , India
| | - Padmani Sandhu
- b School of Life Sciences, Central University of Himachal Pradesh , District-Kangra, Shahpur , Himachal Pradesh 176206 , India
| | - Mushtaq Ahmed
- a School of Earth and Environmental Sciences, Central University of Himachal Pradesh , District-Kangra, Shahpur , Himachal Pradesh 176206 , India
| | - Yusuf Akhter
- b School of Life Sciences, Central University of Himachal Pradesh , District-Kangra, Shahpur , Himachal Pradesh 176206 , India
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19
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Miyaji A, Miyoshi T, Motokura K, Baba T. Discrimination of the prochiral hydrogens at the C-2 position of n-alkanes by the methane/ammonia monooxygenase family proteins. Org Biomol Chem 2015; 13:8261-70. [PMID: 26138087 DOI: 10.1039/c5ob00640f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The selectivity of ammonia monooxygenase from Nitrosomonas europaea (AMO-Ne) for the oxidation of C4-C8n-alkanes to the corresponding alcohol isomers was examined to show the ability of AMO-Ne to recognize the n-alkane orientation within the catalytic site. AMO-Ne in whole cells produces 1- and 2-alcohols from C4-C8n-alkanes, and the regioselectivity is dependent on the length of the carbon chain. 2-Alcohols produced from C4-C7n-alkanes were predominantly either the R- or S-enantiomers, while 2-octanol produced from n-octane was racemic. These results indicate that AMO-Ne can discriminate between the prochiral hydrogens at the C-2 position, with the degree of discrimination varying according to the n-alkane. Compared to the particulate methane monooxygenase (pMMO) of Methylococcus capsulatus (Bath) and that of Methylosinus trichosporium OB3b, AMO-Ne showed a distinct ability to discriminate between the orientation of n-butane and n-pentane in the catalytic site.
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Affiliation(s)
- Akimitsu Miyaji
- Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology, 4259 G-1-14 Nagatsuta-cho, Midori-ku, Yokohama 226-8502, Japan.
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20
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Currin A, Swainston N, Day PJ, Kell DB. Synthetic biology for the directed evolution of protein biocatalysts: navigating sequence space intelligently. Chem Soc Rev 2015; 44:1172-239. [PMID: 25503938 PMCID: PMC4349129 DOI: 10.1039/c4cs00351a] [Citation(s) in RCA: 251] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Indexed: 12/21/2022]
Abstract
The amino acid sequence of a protein affects both its structure and its function. Thus, the ability to modify the sequence, and hence the structure and activity, of individual proteins in a systematic way, opens up many opportunities, both scientifically and (as we focus on here) for exploitation in biocatalysis. Modern methods of synthetic biology, whereby increasingly large sequences of DNA can be synthesised de novo, allow an unprecedented ability to engineer proteins with novel functions. However, the number of possible proteins is far too large to test individually, so we need means for navigating the 'search space' of possible protein sequences efficiently and reliably in order to find desirable activities and other properties. Enzymologists distinguish binding (Kd) and catalytic (kcat) steps. In a similar way, judicious strategies have blended design (for binding, specificity and active site modelling) with the more empirical methods of classical directed evolution (DE) for improving kcat (where natural evolution rarely seeks the highest values), especially with regard to residues distant from the active site and where the functional linkages underpinning enzyme dynamics are both unknown and hard to predict. Epistasis (where the 'best' amino acid at one site depends on that or those at others) is a notable feature of directed evolution. The aim of this review is to highlight some of the approaches that are being developed to allow us to use directed evolution to improve enzyme properties, often dramatically. We note that directed evolution differs in a number of ways from natural evolution, including in particular the available mechanisms and the likely selection pressures. Thus, we stress the opportunities afforded by techniques that enable one to map sequence to (structure and) activity in silico, as an effective means of modelling and exploring protein landscapes. Because known landscapes may be assessed and reasoned about as a whole, simultaneously, this offers opportunities for protein improvement not readily available to natural evolution on rapid timescales. Intelligent landscape navigation, informed by sequence-activity relationships and coupled to the emerging methods of synthetic biology, offers scope for the development of novel biocatalysts that are both highly active and robust.
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Affiliation(s)
- Andrew Currin
- Manchester Institute of Biotechnology , The University of Manchester , 131, Princess St , Manchester M1 7DN , UK . ; http://dbkgroup.org/; @dbkell ; Tel: +44 (0)161 306 4492
- School of Chemistry , The University of Manchester , Manchester M13 9PL , UK
- Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM) , The University of Manchester , 131, Princess St , Manchester M1 7DN , UK
| | - Neil Swainston
- Manchester Institute of Biotechnology , The University of Manchester , 131, Princess St , Manchester M1 7DN , UK . ; http://dbkgroup.org/; @dbkell ; Tel: +44 (0)161 306 4492
- Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM) , The University of Manchester , 131, Princess St , Manchester M1 7DN , UK
- School of Computer Science , The University of Manchester , Manchester M13 9PL , UK
| | - Philip J. Day
- Manchester Institute of Biotechnology , The University of Manchester , 131, Princess St , Manchester M1 7DN , UK . ; http://dbkgroup.org/; @dbkell ; Tel: +44 (0)161 306 4492
- Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM) , The University of Manchester , 131, Princess St , Manchester M1 7DN , UK
- Faculty of Medical and Human Sciences , The University of Manchester , Manchester M13 9PT , UK
| | - Douglas B. Kell
- Manchester Institute of Biotechnology , The University of Manchester , 131, Princess St , Manchester M1 7DN , UK . ; http://dbkgroup.org/; @dbkell ; Tel: +44 (0)161 306 4492
- School of Chemistry , The University of Manchester , Manchester M13 9PL , UK
- Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM) , The University of Manchester , 131, Princess St , Manchester M1 7DN , UK
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21
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Nobili A, Tao Y, Pavlidis IV, van den Bergh T, Joosten HJ, Tan T, Bornscheuer UT. Simultaneous use of in silico design and a correlated mutation network as a tool to efficiently guide enzyme engineering. Chembiochem 2015; 16:805-10. [PMID: 25711719 DOI: 10.1002/cbic.201402665] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Indexed: 12/30/2022]
Abstract
In order to improve the efficiency of directed evolution experiments, in silico multiple-substrate clustering was combined with an analysis of the variability of natural enzymes within a protein superfamily. This was applied to a Pseudomonas fluorescens esterase (PFE I) targeting the enantioselective hydrolysis of 3-phenylbutyric acid esters. Data reported in the literature for nine substrates were used for the clustering meta-analysis of the docking conformations in wild-type PFE I, and this highlighted a tryptophan residue (W28) as an interesting target. Exploration of the most frequently, naturally occurring amino acids at this position suggested that the reduced flexibility observed in the case of the W28F variant leads to enhancement of the enantioselectivity. This mutant was subsequently combined with mutations identified in a library based on analysis of a correlated mutation network. By interrogation of <80 variants a mutant with 15-fold improved enantioselectivity was found.
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Affiliation(s)
- Alberto Nobili
- Institute of Biochemistry, Dept. of Biotechnology and Enzyme Catalysis, Greifswald University, Felix-Hausdorff Strasse 4, 17487 Greifswald (Germany)
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22
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Liu JY, Bian HP, Tang Y, Bai YP, Xu JH. Double substituted variant of Bacillus amyloliquefaciens esterase with enhanced enantioselectivity and high activity towards 1-(3′,4′-methylenedioxyphenyl)ethyl acetate. Appl Microbiol Biotechnol 2014; 99:1701-8. [DOI: 10.1007/s00253-014-5992-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 07/10/2014] [Accepted: 07/26/2014] [Indexed: 12/01/2022]
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23
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Anobom CD, Pinheiro AS, De-Andrade RA, Aguieiras ECG, Andrade GC, Moura MV, Almeida RV, Freire DM. From structure to catalysis: recent developments in the biotechnological applications of lipases. BIOMED RESEARCH INTERNATIONAL 2014; 2014:684506. [PMID: 24783219 PMCID: PMC3982246 DOI: 10.1155/2014/684506] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 02/17/2014] [Indexed: 12/23/2022]
Abstract
Microbial lipases are highly appreciated as biocatalysts due to their peculiar characteristics such as the ability to utilize a wide range of substrates, high activity and stability in organic solvents, and regio- and/or enantioselectivity. These enzymes are currently being applied in a variety of biotechnological processes, including detergent preparation, cosmetics and paper production, food processing, biodiesel and biopolymer synthesis, and the biocatalytic resolution of pharmaceutical derivatives, esters, and amino acids. However, in certain segments of industry, the use of lipases is still limited by their high cost. Thus, there is a great interest in obtaining low-cost, highly active, and stable lipases that can be applied in several different industrial branches. Currently, the design of specific enzymes for each type of process has been used as an important tool to address the limitations of natural enzymes. Nowadays, it is possible to "order" a "customized" enzyme that has ideal properties for the development of the desired bioprocess. This review aims to compile recent advances in the biotechnological application of lipases focusing on various methods of enzyme improvement, such as protein engineering (directed evolution and rational design), as well as the use of structural data for rational modification of lipases in order to create higher active and selective biocatalysts.
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Affiliation(s)
- Cristiane D. Anobom
- Departamento de Bioquímica, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 21941-909 Rio de Janeiro, RJ, Brazil
| | - Anderson S. Pinheiro
- Departamento de Bioquímica, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 21941-909 Rio de Janeiro, RJ, Brazil
| | - Rafael A. De-Andrade
- Departamento de Bioquímica, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 21941-909 Rio de Janeiro, RJ, Brazil
| | - Erika C. G. Aguieiras
- Departamento de Bioquímica, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 21941-909 Rio de Janeiro, RJ, Brazil
| | - Guilherme C. Andrade
- Departamento de Bioquímica, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 21941-909 Rio de Janeiro, RJ, Brazil
| | - Marcelo V. Moura
- Departamento de Bioquímica, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 21941-909 Rio de Janeiro, RJ, Brazil
| | - Rodrigo V. Almeida
- Departamento de Bioquímica, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 21941-909 Rio de Janeiro, RJ, Brazil
| | - Denise M. Freire
- Departamento de Bioquímica, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 21941-909 Rio de Janeiro, RJ, Brazil
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24
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Improving the enantioselectivity of an esterase toward (S)-ketoprofen ethyl ester through protein engineering. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2013.11.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Gu J, Liu M, Guo F, Xie W, Lu W, Ye L, Chen Z, Yuan S, Yu H. Virtual screening of mandelate racemase mutants with enhanced activity based on binding energy in the transition state. Enzyme Microb Technol 2014; 55:121-7. [DOI: 10.1016/j.enzmictec.2013.10.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 10/22/2013] [Accepted: 10/23/2013] [Indexed: 11/30/2022]
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26
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Hidalgo A, Schließmann A, Bornscheuer UT. One-pot Simple methodology for CAssette Randomization and Recombination for focused directed evolution (OSCARR). Methods Mol Biol 2014; 1179:207-212. [PMID: 25055780 DOI: 10.1007/978-1-4939-1053-3_14] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The OSCARR methodology (One-pot Simple methodology for CAssette Randomization and Recombination) bridges the gap between site-directed mutagenesis and full randomization by making use of carefully designed mutagenic cassettes and an optimized one-pot megaprimer PCR. The method is especially suited to construct libraries of up to ten randomized codons for focused directed evolution, exhibits up to 97 % efficiency in the amplification of mutated over wild-type products, and is sufficiently versatile to allow mutagenesis and recombination of several cassettes within the same gene.
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27
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Zhan T, Zhang K, Chen Y, Lin Y, Wu G, Zhang L, Yao P, Shao Z, Liu Z. Improving glyphosate oxidation activity of glycine oxidase from Bacillus cereus by directed evolution. PLoS One 2013; 8:e79175. [PMID: 24223901 PMCID: PMC3818420 DOI: 10.1371/journal.pone.0079175] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 09/20/2013] [Indexed: 11/18/2022] Open
Abstract
Glyphosate, a broad spectrum herbicide widely used in agriculture all over the world, inhibits 5-enolpyruvylshikimate-3-phosphate synthase in the shikimate pathway, and glycine oxidase (GO) has been reported to be able to catalyze the oxidative deamination of various amines and cleave the C-N bond in glyphosate. Here, in an effort to improve the catalytic activity of the glycine oxidase that was cloned from a glyphosate-degrading marine strain of Bacillus cereus (BceGO), we used a bacteriophage T7 lysis-based method for high-throughput screening of oxidase activity and engineered the gene encoding BceGO by directed evolution. Six mutants exhibiting enhanced activity toward glyphosate were screened from two rounds of error-prone PCR combined with site directed mutagenesis, and the beneficial mutations of the six evolved variants were recombined by DNA shuffling. Four recombinants were generated and, when compared with the wild-type BceGO, the most active mutant B3S1 showed the highest activity, exhibiting a 160-fold increase in substrate affinity, a 326-fold enhancement in catalytic efficiency against glyphosate, with little difference between their pH and temperature stabilities. The role of these mutations was explored through structure modeling and molecular docking, revealing that the Arg(51) mutation is near the active site and could be an important residue contributing to the stabilization of glyphosate binding, while the role of the remaining mutations is unclear. These results provide insight into the application of directed evolution in optimizing glycine oxidase function and have laid a foundation for the development of glyphosate-tolerant crops.
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Affiliation(s)
- Tao Zhan
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, P. R. China
| | - Kai Zhang
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, P. R. China
| | - Yangyan Chen
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, P. R. China
| | - Yongjun Lin
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, P. R. China
| | - Gaobing Wu
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, P. R. China
| | - Lili Zhang
- Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin of Xinjiang Production and Construction Corps, College of Life Science, Tarim University, Alar, Xinjiang, P. R. China
| | - Pei Yao
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, P. R. China
| | - Zongze Shao
- Key Laboratory of Marine Biogenetic Resources, the Third Institute of Oceanography, State Oceanic Administration, Xiamen, Fujian, P. R. China
| | - Ziduo Liu
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, P. R. China
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28
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Kiss G, Çelebi-Ölçüm N, Moretti R, Baker D, Houk KN. Computational enzyme design. Angew Chem Int Ed Engl 2013; 52:5700-25. [PMID: 23526810 DOI: 10.1002/anie.201204077] [Citation(s) in RCA: 355] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Indexed: 11/07/2022]
Abstract
Recent developments in computational chemistry and biology have come together in the "inside-out" approach to enzyme engineering. Proteins have been designed to catalyze reactions not previously accelerated in nature. Some of these proteins fold and act as catalysts, but the success rate is still low. The achievements and limitations of the current technology are highlighted and contrasted to other protein engineering techniques. On its own, computational "inside-out" design can lead to the production of catalytically active and selective proteins, but their kinetic performances fall short of natural enzymes. When combined with directed evolution, molecular dynamics simulations, and crowd-sourced structure-prediction approaches, however, computational designs can be significantly improved in terms of binding, turnover, and thermal stability.
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Affiliation(s)
- Gert Kiss
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Dr. East, Los Angeles, CA 90095, USA
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29
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Kiss G, Çelebi-Ölçüm N, Moretti R, Baker D, Houk KN. Computerbasiertes Enzymdesign. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201204077] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Berlemont R, Jacquin O, Delsaute M, La Salla M, Georis J, Verté F, Galleni M, Power P. Novel Cold-Adapted Esterase MHlip from an Antarctic Soil Metagenome. BIOLOGY 2013; 2:177-88. [PMID: 24832657 PMCID: PMC4009859 DOI: 10.3390/biology2010177] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 01/04/2013] [Accepted: 01/11/2013] [Indexed: 11/16/2022]
Abstract
An Antarctic soil metagenomic library was screened for lipolytic enzymes and allowed for the isolation of a new cytosolic esterase from the a/b hydrolase family 6, named MHlip. This enzyme is related to hypothetical genes coding esterases, aryl-esterases and peroxydases, among others. MHlip was produced, purified and its activity was determined. The substrate profile of MHlip reveals a high specificity for short p-nitrophenyl-esters. The apparent optimal activity of MHlip was measured for p-nitrophenyl-acetate, at 33 °C, in the pH range of 6-9. The MHlip thermal unfolding was investigated by spectrophotometric methods, highlighting a transition (Tm) at 50 °C. The biochemical characterization of this enzyme showed its adaptation to cold temperatures, even when it did not present evident signatures associated with cold-adapted proteins. Thus, MHlip adaptation to cold probably results from many discrete structural modifications, allowing the protein to remain active at low temperatures. Functional metagenomics is a powerful approach to isolate new enzymes with tailored biophysical properties (e.g., cold adaptation). In addition, beside the ever growing amount of sequenced DNA, the functional characterization of new catalysts derived from environment is still required, especially for poorly characterized protein families like α/b hydrolases.
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Affiliation(s)
- Renaud Berlemont
- Laboratory of Biological Macromolecules, Centre for Protein Engineering, University of Liège, Institut de Chimie B6a, Liège, Sart-Tilman (4000), Belgium.
| | - Olivier Jacquin
- Laboratory of Biological Macromolecules, Centre for Protein Engineering, University of Liège, Institut de Chimie B6a, Liège, Sart-Tilman (4000), Belgium.
| | - Maud Delsaute
- Laboratory of Biological Macromolecules, Centre for Protein Engineering, University of Liège, Institut de Chimie B6a, Liège, Sart-Tilman (4000), Belgium.
| | - Marcello La Salla
- Laboratory of Biological Macromolecules, Centre for Protein Engineering, University of Liège, Institut de Chimie B6a, Liège, Sart-Tilman (4000), Belgium.
| | | | - Fabienne Verté
- Puratos Group, Industrielaan 25, Groot-Bijgarden, Belgium.
| | - Moreno Galleni
- Laboratory of Biological Macromolecules, Centre for Protein Engineering, University of Liège, Institut de Chimie B6a, Liège, Sart-Tilman (4000), Belgium.
| | - Pablo Power
- Laboratory of Biological Macromolecules, Centre for Protein Engineering, University of Liège, Institut de Chimie B6a, Liège, Sart-Tilman (4000), Belgium.
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31
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Alvizo O, Mittal S, Mayo SL, Schiffer CA. Structural, kinetic, and thermodynamic studies of specificity designed HIV-1 protease. Protein Sci 2012; 21:1029-41. [PMID: 22549928 DOI: 10.1002/pro.2086] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 03/23/2012] [Accepted: 04/10/2012] [Indexed: 02/02/2023]
Abstract
HIV-1 protease recognizes and cleaves more than 12 different substrates leading to viral maturation. While these substrates share no conserved motif, they are specifically selected for and cleaved by protease during viral life cycle. Drug resistant mutations evolve within the protease that compromise inhibitor binding but allow the continued recognition of all these substrates. While the substrate envelope defines a general shape for substrate recognition, successfully predicting the determinants of substrate binding specificity would provide additional insights into the mechanism of altered molecular recognition in resistant proteases. We designed a variant of HIV protease with altered specificity using positive computational design methods and validated the design using X-ray crystallography and enzyme biochemistry. The engineered variant, Pr3 (A28S/D30F/G48R), was designed to preferentially bind to one out of three of HIV protease's natural substrates; RT-RH over p2-NC and CA-p2. In kinetic assays, RT-RH binding specificity for Pr3 increased threefold compared to the wild-type (WT), which was further confirmed by isothermal titration calorimetry. Crystal structures of WT protease and the designed variant in complex with RT-RH, CA-p2, and p2-NC were determined. Structural analysis of the designed complexes revealed that one of the engineered substitutions (G48R) potentially stabilized heterogeneous flap conformations, thereby facilitating alternate modes of substrate binding. Our results demonstrate that while substrate specificity could be engineered in HIV protease, the structural pliability of protease restricted the propagation of interactions as predicted. These results offer new insights into the plasticity and structural determinants of substrate binding specificity of the HIV-1 protease.
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Affiliation(s)
- Oscar Alvizo
- Division of Biology, Biochemistry and Molecular Biophysics Option, California Institute of Technology, Pasadena, California 91125, USA
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Gumulya Y, Sanchis J, Reetz MT. Many Pathways in Laboratory Evolution Can Lead to Improved Enzymes: How to Escape from Local Minima. Chembiochem 2012; 13:1060-6. [DOI: 10.1002/cbic.201100784] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Indexed: 12/29/2022]
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Kohila V, Jaiswal A, Ghosh SS. Rationally designed Escherichia coli cytosine deaminase mutants with improved specificity towards the prodrug 5-fluorocytosine for potential gene therapy applications. MEDCHEMCOMM 2012. [DOI: 10.1039/c2md20209c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Strafford J, Payongsri P, Hibbert EG, Morris P, Batth SS, Steadman D, Smith MEB, Ward JM, Hailes HC, Dalby PA. Directed evolution to re-adapt a co-evolved network within an enzyme. J Biotechnol 2011; 157:237-45. [PMID: 22154561 PMCID: PMC3657141 DOI: 10.1016/j.jbiotec.2011.11.017] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 11/19/2011] [Accepted: 11/22/2011] [Indexed: 12/04/2022]
Abstract
We have previously used targeted active-site saturation mutagenesis to identify a number of transketolase single mutants that improved activity towards either glycolaldehyde (GA), or the non-natural substrate propionaldehyde (PA). Here, all attempts to recombine the singles into double mutants led to unexpected losses of specific activity towards both substrates. A typical trade-off occurred between soluble expression levels and specific activity for all single mutants, but many double mutants decreased both properties more severely suggesting a critical loss of protein stability or native folding. Statistical coupling analysis (SCA) of a large multiple sequence alignment revealed a network of nine co-evolved residues that affected all but one double mutant. Such networks maintain important functional properties such as activity, specificity, folding, stability, and solubility and may be rapidly disrupted by introducing one or more non-naturally occurring mutations. To identify variants of this network that would accept and improve upon our best D469 mutants for activity towards PA, we created a library of random single, double and triple mutants across seven of the co-evolved residues, combining our D469 variants with only naturally occurring mutations at the remaining sites. A triple mutant cluster at D469, E498 and R520 was found to behave synergistically for the specific activity towards PA. Protein expression was severely reduced by E498D and improved by R520Q, yet variants containing both mutations led to improved specific activity and enzyme expression, but with loss of solubility and the formation of inclusion bodies. D469S and R520Q combined synergistically to improve kcat 20-fold for PA, more than for any previous transketolase mutant. R520Q also doubled the specific activity of the previously identified D469T to create our most active transketolase mutant to date. Our results show that recombining active-site mutants obtained by saturation mutagenesis can rapidly destabilise critical networks of co-evolved residues, whereas beneficial single mutants can be retained and improved upon by randomly recombining them with natural variants at other positions in the network.
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Affiliation(s)
- John Strafford
- Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
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van Leeuwen JGE, Wijma HJ, Floor RJ, van der Laan JM, Janssen DB. Directed Evolution Strategies for Enantiocomplementary Haloalkane Dehalogenases: From Chemical Waste to Enantiopure Building Blocks. Chembiochem 2011; 13:137-48. [DOI: 10.1002/cbic.201100579] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Indexed: 01/06/2023]
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Bornscheuer U, Kazlauskas RJ. Survey of protein engineering strategies. CURRENT PROTOCOLS IN PROTEIN SCIENCE 2011; Chapter 26:26.7.1-26.7.14. [PMID: 22045562 DOI: 10.1002/0471140864.ps2607s66] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Protein engineering is altering the structure of a protein to improve or change its properties. This unit summarizes concepts for protein engineering using rational design, directed evolution, and combinations of them. Different strategies are presented for identifying the best mutagenesis method, how to identify desired variants by screening or selection, and examples for successful applications are given. This should enable researchers to choose the most promising tools to solve their protein engineering challenges.
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Affiliation(s)
- Uwe Bornscheuer
- Department of Biotechnology and Enzyme Catalysis, Institute of Biochemistry, Greifswald University, Greifswald, Germany
| | - Romas J Kazlauskas
- Department of Biochemistry, Molecular Biology and Biophysics and the Biotechnology Institute, University of Minnesota, Saint Paul, Minnesota
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Fernández-Álvaro E, Snajdrova R, Jochens H, Davids T, Böttcher D, Bornscheuer UT. A Combination of In Vivo Selection and Cell Sorting for the Identification of Enantioselective Biocatalysts. Angew Chem Int Ed Engl 2011; 50:8584-7. [DOI: 10.1002/anie.201102360] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Indexed: 11/11/2022]
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Fernández-Álvaro E, Snajdrova R, Jochens H, Davids T, Böttcher D, Bornscheuer UT. Eine Kombination aus In-vivo-Selektion und Zellsortierung zur Identifizierung enantioselektiver Biokatalysatoren. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201102360] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Strategy and success for the directed evolution of enzymes. Curr Opin Struct Biol 2011; 21:473-80. [DOI: 10.1016/j.sbi.2011.05.003] [Citation(s) in RCA: 139] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Accepted: 05/25/2011] [Indexed: 11/20/2022]
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Jochens H, Hesseler M, Stiba K, Padhi SK, Kazlauskas RJ, Bornscheuer UT. Protein Engineering of α/β-Hydrolase Fold Enzymes. Chembiochem 2011; 12:1508-17. [DOI: 10.1002/cbic.201000771] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Indexed: 01/01/2023]
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Cassimjee KE, Kourist R, Lindberg D, Wittrup Larsen M, Thanh NH, Widersten M, Bornscheuer UT, Berglund P. One-step enzyme extraction and immobilization for biocatalysis applications. Biotechnol J 2011; 6:463-9. [DOI: 10.1002/biot.201000357] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 12/27/2010] [Accepted: 01/12/2011] [Indexed: 11/11/2022]
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Jiang Y, Morley KL, Schrag JD, Kazlauskas RJ. Different active-site loop orientation in serine hydrolases versus acyltransferases. Chembiochem 2011; 12:768-76. [PMID: 21351219 DOI: 10.1002/cbic.201000693] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Indexed: 11/07/2022]
Abstract
Acyl transfer is a key reaction in biosynthesis, including synthesis of antibiotics and polyesters. Although researchers have long recognized the similar protein fold and catalytic machinery in acyltransferases and hydrolases, the molecular basis for the different reactivity has been a long-standing mystery. By comparison of X-ray structures, we identified a different oxyanion-loop orientation in the active site. In esterases/lipases a carbonyl oxygen points toward the active site, whereas in acyltransferases a NH of the main-chain amide points toward the active site. Amino acid sequence comparisons alone cannot identify such a difference in the main-chain orientation. To identify how this difference might change the reaction mechanism, we solved the X-ray crystal structure of Pseudomonas fluorescens esterase containing a sulfonate transition-state analogue bound to the active-site serine. This structure mimics the transition state for the attack of water on the acyl-enzyme and shows a bridging water molecule between the carbonyl oxygen mentioned above and the sulfonyl oxygen that mimics the attacking water. A possible mechanistic role for this bridging water molecule is to position and activate the attacking water molecule in hydrolases, but to deactivate the attacking water molecule in acyl transferases.
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Affiliation(s)
- Yun Jiang
- Department of Biochemistry, Molecular Biology and Biophysics, Biotechnology Institute, University of Minnesota, 1479 Gortner Avenue, Saint Paul, MN 55108, USA
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Kourist R, Jochens H, Bartsch S, Kuipers R, Padhi SK, Gall M, Böttcher D, Joosten HJ, Bornscheuer UT. The alpha/beta-hydrolase fold 3DM database (ABHDB) as a tool for protein engineering. Chembiochem 2010; 11:1635-43. [PMID: 20593436 DOI: 10.1002/cbic.201000213] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Robert Kourist
- Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, Greifswald University, Felix-Hausdorff-Strasse 4, 17487 Greifswald, Germany
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Reetz MT, Prasad S, Carballeira JD, Gumulya Y, Bocola M. Iterative saturation mutagenesis accelerates laboratory evolution of enzyme stereoselectivity: rigorous comparison with traditional methods. J Am Chem Soc 2010; 132:9144-52. [PMID: 20536132 DOI: 10.1021/ja1030479] [Citation(s) in RCA: 185] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Efficacy in laboratory evolution of enzymes is currently a pressing issue, making comparative studies of different methods and strategies mandatory. Recent reports indicate that iterative saturation mutagenesis (ISM) provides a means to accelerate directed evolution of stereoselectivity and thermostability, but statistically meaningful comparisons with other methods have not been documented to date. In the present study, the efficacy of ISM has been rigorously tested by applying it to the previously most systematically studied enzyme in directed evolution, the lipase from Pseudomonas aeruginosa as a catalyst in the stereoselective hydrolytic kinetic resolution of a chiral ester. Upon screening only 10,000 transformants, unprecedented enantioselectivity was achieved (E = 594). ISM proves to be considerably more efficient than all previous systematic efforts utilizing error-prone polymerase chain reaction at different mutation rates, saturation mutagenesis at hot spots, and/or DNA shuffling, pronounced positive epistatic effects being the underlying reason.
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Affiliation(s)
- Manfred T Reetz
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany.
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Reetz MT. Gerichtete Evolution stereoselektiver Enzyme: Eine ergiebige Katalysator‐Quelle für asymmetrische Reaktionen. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000826] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Manfred T. Reetz
- Max‐Planck‐Institut für Kohlenforschung, Kaiser‐Wilhelm‐Platz 1, 45470 Mülheim an der Ruhr (Deutschland), Fax: (+49) 208‐306‐2985 http://www.mpi‐muelheim.mpg.de/mpikofo_home.html
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Reetz MT. Laboratory Evolution of Stereoselective Enzymes: A Prolific Source of Catalysts for Asymmetric Reactions. Angew Chem Int Ed Engl 2010; 50:138-74. [DOI: 10.1002/anie.201000826] [Citation(s) in RCA: 441] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Manfred T. Reetz
- Max‐Planck‐Institut für Kohlenforschung, Kaiser‐Wilhelm‐Platz 1, 45470 Mülheim an der Ruhr (Germany), Fax: (+49) 208‐306‐2985 http://www.mpi‐muelheim.mpg.de/mpikofo_home.html
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Jochens H, Bornscheuer UT. Natural Diversity to Guide Focused Directed Evolution. Chembiochem 2010; 11:1861-6. [DOI: 10.1002/cbic.201000284] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Cambon E, Piamtongkam R, Bordes F, Duquesne S, Laguerre S, Nicaud JM, Marty A. A new Yarrowia lipolytica expression system: An efficient tool for rapid and reliable kinetic analysis of improved enzymes. Enzyme Microb Technol 2010. [DOI: 10.1016/j.enzmictec.2010.06.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Chen X, Liu J, Yang P, Chen D. Identifying functional residues in Arabidopsis thaliana zeta class glutathione S-transferase through screening inactive point mutants. BIOCHEMISTRY (MOSCOW) 2010; 75:110-20. [DOI: 10.1134/s0006297910010141] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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