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Tarraran L, Gandini C, Luganini A, Mazzoli R. Cell-surface binding domains from Clostridium cellulovorans can be used for surface display of cellulosomal scaffoldins in Lactococcus lactis. Biotechnol J 2021; 16:e2100064. [PMID: 34019730 DOI: 10.1002/biot.202100064] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 05/17/2021] [Accepted: 05/19/2021] [Indexed: 11/05/2022]
Abstract
Engineering microbial strains combining efficient lignocellulose metabolization and high-value chemical production is a cutting-edge strategy towards cost-sustainable 2nd generation biorefining. Here, protein components of the Clostridium cellulovorans cellulosome were introduced in Lactococcus lactis IL1403, one of the most efficient lactic acid producers but unable to directly ferment cellulose. Cellulosomes are protein complexes with high cellulose depolymerization activity whose synergistic action is supported by scaffolding protein(s) (i.e., scaffoldins). Scaffoldins are involved in bringing enzymes close to each other and often anchor the cellulosome to the cell surface. In this study, three synthetic scaffoldins were engineered by using domains derived from the main scaffoldin CbpA and the Endoglucanase E (EngE) of the C. cellulovorans cellulosome. Special focus was on CbpA X2 and EngE S-layer homology (SLH) domains possibly involved in cell-surface anchoring. The recombinant scaffoldins were successfully introduced in and secreted by L. lactis. Among them, only that carrying the three EngE SLH modules was able to bind to the L. lactis surface although these domains lack the conserved TRAE motif thought to mediate binding with secondary cell wall polysaccharides. The synthetic scaffoldins engineered in this study could serve for assembly of secreted or surface-displayed designer cellulosomes in L. lactis.
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Affiliation(s)
- Loredana Tarraran
- Structural and Functional Biochemistry, Laboratory of Proteomics and Metabolic Engineering of Prokaryotes, Department of Life Sciences and Systems Biology, University of Torino, Torino, Italy.,Department of Applied Science and Technology, Politecnico of Turin, Torino, Italy
| | - Chiara Gandini
- Structural and Functional Biochemistry, Laboratory of Proteomics and Metabolic Engineering of Prokaryotes, Department of Life Sciences and Systems Biology, University of Torino, Torino, Italy
| | - Anna Luganini
- Laboratory of Microbiology and Virology, Department of Life Sciences and Systems Biology, University of Torino, Torino, Italy
| | - Roberto Mazzoli
- Structural and Functional Biochemistry, Laboratory of Proteomics and Metabolic Engineering of Prokaryotes, Department of Life Sciences and Systems Biology, University of Torino, Torino, Italy
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2
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Tay PKR, Lim PY, Ow DSW. A SH3_5 Cell Anchoring Domain for Non-recombinant Surface Display on Lactic Acid Bacteria. Front Bioeng Biotechnol 2021; 8:614498. [PMID: 33585415 PMCID: PMC7873443 DOI: 10.3389/fbioe.2020.614498] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 12/30/2020] [Indexed: 12/17/2022] Open
Abstract
Lactic acid bacteria (LAB) are a group of gut commensals increasingly recognized for their potential to deliver bioactive molecules in vivo. The delivery of therapeutic proteins, in particular, can be achieved by anchoring them to the bacterial surface, and various anchoring domains have been described for this application. Here, we investigated a new cell anchoring domain (CAD4a) isolated from a Lactobacillus protein, containing repeats of a SH3_5 motif that binds non-covalently to peptidoglycan in the LAB cell wall. Using a fluorescent reporter, we showed that C-terminal CAD4a bound Lactobacillus fermentum selectively out of a panel of LAB strains, and cell anchoring was uniform across the cell surface. Conditions affecting CAD4a anchoring were studied, including temperature, pH, salt concentration, and bacterial growth phase. Quantitative analysis showed that CAD4a allowed display of 105 molecules of monomeric protein per cell. We demonstrated the surface display of a functional protein with superoxide dismutase (SOD), an antioxidant enzyme potentially useful for treating gut inflammation. SOD displayed on cells could be protected from gastric digestion using a polymer matrix. Taken together, our results show the feasibility of using CAD4a as a novel cell anchor for protein surface display on LAB.
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Affiliation(s)
- Pei Kun Richie Tay
- Microbial Cells Group, Bioprocessing Technology Institute, Agency for Science, Technology and Research (ASTAR), Singapore, Singapore
| | - Pei Yu Lim
- Microbial Cells Group, Bioprocessing Technology Institute, Agency for Science, Technology and Research (ASTAR), Singapore, Singapore
| | - Dave Siak-Wei Ow
- Microbial Cells Group, Bioprocessing Technology Institute, Agency for Science, Technology and Research (ASTAR), Singapore, Singapore
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3
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You SK, Ko YJ, Shin SK, Hwang DH, Kang DH, Park HM, Han SO. Enhanced CO 2 fixation and lipid production of Chlorella vulgaris through the carbonic anhydrase complex. BIORESOURCE TECHNOLOGY 2020; 318:124072. [PMID: 32911368 DOI: 10.1016/j.biortech.2020.124072] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/27/2020] [Accepted: 08/30/2020] [Indexed: 06/11/2023]
Abstract
Photosynthesis of C. vulgaris shows slow growth and low lipid production due to the low solubility of CO2, and it is thus necessary to increase the dissolved inorganic carbon source to solve this problem. In this study, carbonic anhydrase (CA) was fused with dockerin to form a CA complex by cohesion-dockerin interaction. The CA complex was displayed on the surface of C. vulgaris by a cellulose binding module. The CA complex increased activity and stability compared to those of a single enzyme. Additionally, C. vulgaris showed an average of 1.6-fold rapid growth during log phase through the influence of the CA complex. The bicarbonate produced by the CA complex increased the lipid production about 1.7-fold (23.3%), compared to 13.6% for the control group. The present results suggest that the CA complex successfully enhances the CO2 fixation, which should be an essential study for 4th generation biofuels.
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Affiliation(s)
- Seung Kyou You
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Young Jin Ko
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Sang Kyu Shin
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Dong-Hyeuk Hwang
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Dae Hee Kang
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Hyeon Min Park
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Sung Ok Han
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea.
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Ben‐David Y, Moraïs S, Bayer EA, Mizrahi I. Rapid adaptation for fibre degradation by changes in plasmid stoichiometry within Lactobacillus plantarum at the synthetic community level. Microb Biotechnol 2020; 13:1748-1764. [PMID: 32639625 PMCID: PMC7533337 DOI: 10.1111/1751-7915.13584] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 04/11/2020] [Accepted: 04/12/2020] [Indexed: 12/19/2022] Open
Abstract
The multi-enzyme cellulosome complex can mediate the valorization of lignocellulosic biomass into soluble sugars that can serve in the production of biofuels and valuable products. A potent bacterial chassis for the production of active cellulosomes displayed on the cell surface is the bacterium Lactobacillus plantarum, a lactic acid bacterium used in many applications. Here, we developed a methodological pipeline to produce improved designer cellulosomes, using a cell-consortium approach, whereby the different components self-assemble on the surface of L. plantarum. The pipeline served as a vehicle to select and optimize the secretion efficiency of potent designer cellulosome enzyme components, to screen for the most efficient enzymatic combinations and to assess attempts to grow the engineered bacterial cells on wheat straw as a sole carbon source. Using this strategy, we were able to improve the secretion efficiency of the selected enzymes and to secrete a fully functional high-molecular-weight scaffoldin component. The adaptive laboratory process served to increase significantly the enzymatic activity of the most efficient cell consortium. Internal plasmid re-arrangement towards a higher enzymatic performance attested for the suitability of the approach, which suggests that this strategy represents an efficient way for microbes to adapt to changing conditions.
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Affiliation(s)
- Yonit Ben‐David
- Department of Biomolecular SciencesThe Weizmann Institute of ScienceRehovot7610001Israel
| | - Sarah Moraïs
- Department of Biomolecular SciencesThe Weizmann Institute of ScienceRehovot7610001Israel
- Department of Life SciencesNational Institute for Biotechnology in the NegevBen‐Gurion University of the NegevBeer‐Sheva8499000Israel
| | - Edward A. Bayer
- Department of Biomolecular SciencesThe Weizmann Institute of ScienceRehovot7610001Israel
| | - Itzhak Mizrahi
- Department of Life SciencesNational Institute for Biotechnology in the NegevBen‐Gurion University of the NegevBeer‐Sheva8499000Israel
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Dvořák P, Bayer EA, de Lorenzo V. Surface Display of Designer Protein Scaffolds on Genome-Reduced Strains of Pseudomonas putida. ACS Synth Biol 2020; 9:2749-2764. [PMID: 32877604 DOI: 10.1021/acssynbio.0c00276] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The bacterium Pseudomonas putida KT2440 is gaining considerable interest as a microbial platform for biotechnological valorization of polymeric organic materials, such as lignocellulosic residues or plastics. However, P. putida on its own cannot make much use of such complex substrates, mainly because it lacks an efficient extracellular depolymerizing apparatus. We seek to address this limitation by adopting a recombinant cellulosome strategy for this host. In this work, we report an essential step in this endeavor-a display of designer enzyme-anchoring protein "scaffoldins", encompassing cohesin binding domains from divergent cellulolytic bacterial species on the P. putida surface. Two P. putida chassis strains, EM42 and EM371, with streamlined genomes and differences in the composition of the outer membrane were employed in this study. Scaffoldin variants were optimally delivered to their surface with one of four tested autotransporter systems (Ag43 from Escherichia coli), and the efficient display was confirmed by extracellular attachment of chimeric β-glucosidase and fluorescent proteins. Our results not only highlight the value of cell surface engineering for presentation of recombinant proteins on the envelope of Gram-negative bacteria but also pave the way toward designer cellulosome strategies tailored for P. putida.
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Affiliation(s)
- Pavel Dvořák
- Department of Experimental Biology (Section of Microbiology), Faculty of Science, Masaryk University, Kamenice 753/5, 62500 Brno, Czech Republic
| | - Edward A Bayer
- Department of Biomolecular Sciences, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Víctor de Lorenzo
- Systems and Synthetic Biology Program, Centro Nacional de Biotecnología CNB-CSIC, Cantoblanco, Darwin 3, 28049 Madrid, Spain
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Anandharaj M, Lin YJ, Rani RP, Nadendla EK, Ho MC, Huang CC, Cheng JF, Chang JJ, Li WH. Constructing a yeast to express the largest cellulosome complex on the cell surface. Proc Natl Acad Sci U S A 2020; 117:2385-2394. [PMID: 31953261 PMCID: PMC7007581 DOI: 10.1073/pnas.1916529117] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Cellulosomes, which are multienzyme complexes from anaerobic bacteria, are considered nature's finest cellulolytic machinery. Thus, constructing a cellulosome in an industrial yeast has long been a goal pursued by scientists. However, it remains highly challenging due to the size and complexity of cellulosomal genes. Here, we overcame the difficulties by synthesizing the Clostridium thermocellum scaffoldin gene (CipA) and the anchoring protein gene (OlpB) using advanced synthetic biology techniques. The engineered Kluyveromyces marxianus, a probiotic yeast, secreted a mixture of dockerin-fused fungal cellulases, including an endoglucanase (TrEgIII), exoglucanase (CBHII), β-glucosidase (NpaBGS), and cellulase boosters (TaLPMO and MtCDH). The confocal microscopy results confirmed the cell-surface display of OlpB-ScGPI and fluorescence-activated cell sorting analysis results revealed that almost 81% of yeast cells displayed OlpB-ScGPI. We have also demonstrated the cellulosome complex formation using purified and crude cellulosomal proteins. Native polyacrylamide gel electrophoresis and mass spectrometric analysis further confirmed the cellulosome complex formation. Our engineered cellulosome can accommodate up to 63 enzymes, whereas the largest engineered cellulosome reported thus far could accommodate only 12 enzymes and was expressed by a plasmid instead of chromosomal integration. Interestingly, CipA 2B9C (with two cellulose binding modules, CBM) released significantly higher quantities of reducing sugars compared with other CipA variants, thus confirming the importance of cohesin numbers and CBM domain on cellulosome complex. The engineered yeast host efficiently degraded cellulosic substrates and released 3.09 g/L and 8.61 g/L of ethanol from avicel and phosphoric acid-swollen cellulose, respectively, which is higher than any previously constructed yeast cellulosome.
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Affiliation(s)
- Marimuthu Anandharaj
- Biodiversity Research Center, Academia Sinica, 11529 Taipei, Taiwan
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, National Chung Hsing University and Academia Sinica, 11529 Taipei, Taiwan
- Graduate Institute of Biotechnology, National Chung Hsing University, 40227 Taichung, Taiwan
| | - Yu-Ju Lin
- Biodiversity Research Center, Academia Sinica, 11529 Taipei, Taiwan
| | | | | | - Meng-Chiao Ho
- Institute of Biological Chemistry, Academia Sinica, 11529 Taipei, Taiwan
| | - Chieh-Chen Huang
- Department of Life Sciences, National Chung Hsing University, 40227 Taichung, Taiwan
- Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, 40227 Taichung, Taiwan
| | - Jan-Fang Cheng
- Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Walnut Creek, CA 94598
| | - Jui-Jen Chang
- Department of Medical Research, China Medical University Hospital, China Medical University, 402 Taichung, Taiwan;
| | - Wen-Hsiung Li
- Biodiversity Research Center, Academia Sinica, 11529 Taipei, Taiwan;
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, National Chung Hsing University and Academia Sinica, 11529 Taipei, Taiwan
- Biotechnology Center, National Chung Hsing University, 40227 Taichung, Taiwan
- Department of Ecology and Evolution, University of Chicago, Chicago, IL 60637
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Tarraran L, Mazzoli R. Alternative strategies for lignocellulose fermentation through lactic acid bacteria: the state of the art and perspectives. FEMS Microbiol Lett 2019; 365:4995910. [PMID: 30007320 DOI: 10.1093/femsle/fny126] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 05/11/2018] [Indexed: 12/22/2022] Open
Abstract
Lactic acid bacteria (LAB) have a long history in industrial processes as food starters and biocontrol agents, and also as producers of high-value compounds. Lactic acid, their main product, is among the most requested chemicals because of its multiple applications, including the synthesis of biodegradable plastic polymers. Moreover, LAB are attractive candidates for the production of ethanol, polyhydroalkanoates, sweeteners and exopolysaccharides. LAB generally have complex nutritional requirements. Furthermore, they cannot directly ferment inexpensive feedstocks such as lignocellulose. This significantly increases the cost of LAB fermentation and hinders its application in the production of high volumes of low-cost chemicals. Different strategies have been explored to extend LAB fermentation to lignocellulosic biomass. Fermentation of lignocellulose hydrolysates by LAB has been frequently reported and is the most mature technology. However, current economic constraints of this strategy have driven research for alternative approaches. Co-cultivation of LAB with native cellulolytic microorganisms may reduce the high cost of exogenous cellulase supplementation. Special attention is given in this review to the construction of recombinant cellulolytic LAB by metabolic engineering, which may generate strains able to directly ferment plant biomass. The state of the art of these strategies is illustrated along with perspectives of their applications to industrial second generation biorefinery processes.
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Affiliation(s)
- Loredana Tarraran
- Structural and Functional Biochemistry, Laboratory of Proteomics and Metabolic Engineering of Prokaryotes, Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Torino, Italy
| | - Roberto Mazzoli
- Structural and Functional Biochemistry, Laboratory of Proteomics and Metabolic Engineering of Prokaryotes, Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Torino, Italy
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Plavec TV, Štrukelj B, Berlec A. Screening for New Surface Anchoring Domains for Lactococcus lactis. Front Microbiol 2019; 10:1879. [PMID: 31456787 PMCID: PMC6700490 DOI: 10.3389/fmicb.2019.01879] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 07/30/2019] [Indexed: 12/14/2022] Open
Abstract
The display of recombinant proteins on bacterial surfaces is a developing research area with a wide range of potential biotechnological applications. The lactic acid bacterium Lactococcus lactis is an attractive host for such surface display, and a promising vector for in vivo delivery of bioactive proteins. Surface-displayed recombinant proteins are usually anchored to the bacterial cell wall through anchoring domains. Here, we investigated alternatives to the commonly applied lactococcal lysine motif (LysM)-containing surface anchoring domain, the C-terminus of AcmA (cAcmA). We screened 15 anchoring domains of lactococcal or phage origins that belong to the Pfam categories LPXTG, LysM, CW_1, Cpl-7, WxL, SH3, and ChW, which can provide non-covalent or covalent binding to the cell wall. LPXTG, LysM, the duplicated CW_1 and SH3 domains promoted significant surface display of two model proteins, B domain and DARPin I07, although the display achieved was lower than that for the reference anchoring domain, cAcmA. On the other hand, the ChW-containing anchoring domain of the lactococcal phage AM12 endolysin (cAM12) demonstrated surface display comparable to that of cAcmA. The anchoring ability of cAM12 was confirmed by enabling non-covalent heterologous anchoring of the B domain on wild-type bacteria, as well as anchoring of CXCL8-binding evasin-3, which provided potential therapeutic applicability; both were displayed to an extent comparable to that of cAcmA. We have thereby demonstrated the effective use of different protein anchoring domains in L. lactis, with ChW-containing cAM12 the most promising alternative to the established approaches for surface display on L. lactis.
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Affiliation(s)
- Tina Vida Plavec
- Department of Biotechnology, Jožef Stefan Institute, Ljubljana, Slovenia.,Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Borut Štrukelj
- Department of Biotechnology, Jožef Stefan Institute, Ljubljana, Slovenia.,Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Aleš Berlec
- Department of Biotechnology, Jožef Stefan Institute, Ljubljana, Slovenia.,Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
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Han L, Liang B, Song J, Liu A. Rational design of engineered microbial cell surface multi-enzyme co-display system for sustainable NADH regeneration from low-cost biomass. J Ind Microbiol Biotechnol 2018; 45:111-121. [PMID: 29322283 DOI: 10.1007/s10295-018-2002-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 12/22/2017] [Indexed: 12/28/2022]
Abstract
As an important cofactor, NADH is essential for most redox reactions and biofuel cells. However, supply of exogenous NADH is challenged, due to the low production efficiency and high cost of NADH regeneration system, as well as low stability of NADH. Here, we constructed a novel cell surface multi-enzyme co-display system with ratio- and space-controllable manner as exogenous NADH regeneration system for the sustainable NADH production from low-cost biomass. Dockerin-fused glucoamylase (GA) and glucose dehydrogenase (GDH) were expressed and assembled on the engineered bacterial surfaces, which displayed protein scaffolds with various combinations of different cohesins. When the ratio of GA and GDH was 3:1, the NADH production rate of the whole-cell biocatalyst reached the highest level using starch as substrate, which was three times higher than that of mixture of free enzymes, indicating that the highly ordered spatial organization of enzymes would promote reactions, due to the ratio of enzymes and proximity effect. To confirm performance of the established NADH regeneration system, the highly efficient synthesis of L-lactic acid (L-LA) was conducted by the system and the yield of L-LA (16 g/L) was twice higher than that of the mixture of free enzymes. The multi-enzyme co-display system showed good stability in the cyclic utilization. In conclusion, the novel sustainable NADH system would provide a cost-effective strategy to regenerate cofactor from low-cost biomass.
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Affiliation(s)
- Lei Han
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, 700 Changcheng Road, Qingdao, 266109, China.
| | - Bo Liang
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, 266101, China.
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China.
| | - Jianxia Song
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, 266101, China
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Kang DH, You SK, Joo YC, Shin SK, Hyeon JE, Han SO. Synergistic effect of the enzyme complexes comprising agarase, carrageenase and neoagarobiose hydrolase on degradation of the red algae. BIORESOURCE TECHNOLOGY 2018; 250:666-672. [PMID: 29220811 DOI: 10.1016/j.biortech.2017.11.098] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 11/28/2017] [Accepted: 11/29/2017] [Indexed: 06/07/2023]
Abstract
In the practice of converting red algae biomass into biofuel or valuable biomaterials, the critical step is the decomposition process of the agarose to give fermentable monomeric sugars. In this study, we selected three enzymes such as agarase, carrageenase and neoagarobiose hydrolase to inducible the simultaneous hydrolysis of the major substrates such as agar and carrageenan constituting the pretreated red algae, and expressed the chimeric enzymes and formed a complexes through optimization of addition ratio. As a result, hydrolysis by enzyme complexes showed a maximum sugar release of 679 mg L-1 with 67.9% saccharification yield from G. verrucosa natural substrate. The difference in the reducing sugar by the enzyme complexes was 3.6-fold higher than that of the monomer enzyme (cAgaB yield 188.6 mg L-1). The synergistic effect of producing sugars from red algae biomass through these enzyme complexes can be a very important biological tools aimed at bioenergy production.
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Affiliation(s)
- Dae Hee Kang
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea; Institute of Life Science and Natural Resources, Korea University, Seoul 02841, Republic of Korea
| | - Seung Kyou You
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Young-Chul Joo
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Sang Kyu Shin
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Jeong Eun Hyeon
- Institute of Life Science and Natural Resources, Korea University, Seoul 02841, Republic of Korea
| | - Sung Ok Han
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea.
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11
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Surface display on lactic acid bacteria without genetic modification: strategies and applications. Appl Microbiol Biotechnol 2016; 100:9407-9421. [DOI: 10.1007/s00253-016-7842-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 08/31/2016] [Accepted: 09/03/2016] [Indexed: 12/21/2022]
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12
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Michon C, Langella P, Eijsink VGH, Mathiesen G, Chatel JM. Display of recombinant proteins at the surface of lactic acid bacteria: strategies and applications. Microb Cell Fact 2016; 15:70. [PMID: 27142045 PMCID: PMC4855500 DOI: 10.1186/s12934-016-0468-9] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 04/21/2016] [Indexed: 01/07/2023] Open
Abstract
Lactic acid bacteria (LAB) are promising vectors of choice to deliver active molecules to mucosal tissues. They are recognized as safe by the World Health Organization and some strains have probiotic properties. The wide range of potential applications of LAB-driven mucosal delivery includes control of inflammatory bowel disease, vaccine delivery, and management of auto-immune diseases. Because of this potential, strategies for the display of proteins at the surface of LAB are gaining interest. To display a protein at the surface of LAB, a signal peptide and an anchor domain are necessary. The recombinant protein can be attached to the membrane layer, using a transmembrane anchor or a lipoprotein-anchor, or to the cell wall, by a covalent link using sortase mediated anchoring via the LPXTG motif, or by non-covalent liaisons employing binding domains such as LysM or WxL. Both the stability and functionality of the displayed proteins will be affected by the kind of anchor used. The most commonly surfaced exposed recombinant proteins produced in LAB are antigens and antibodies and the most commonly used LAB are lactococci and lactobacilli. Although it is not necessarily so that surface-display is the preferred localization in all cases, it has been shown that for certain applications, such as delivery of the human papillomavirus E7 antigen, surface-display elicits better biological responses, compared to cytosolic expression or secretion. Recent developments include the display of peptides and proteins targeting host cell receptors, for the purpose of enhancing the interactions between LAB and host. Surface-display technologies have other potential applications, such as degradation of biomass, which is of importance for some potential industrial applications of LAB.
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Affiliation(s)
- C. Michon
- />Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - P. Langella
- />Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - V. G. H. Eijsink
- />Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway
| | - G. Mathiesen
- />Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway
| | - J. M. Chatel
- />Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
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Tanaka T, Kondo A. Cell surface engineering of industrial microorganisms for biorefining applications. Biotechnol Adv 2015; 33:1403-11. [PMID: 26070720 DOI: 10.1016/j.biotechadv.2015.06.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Revised: 06/04/2015] [Accepted: 06/06/2015] [Indexed: 11/19/2022]
Abstract
In order to decrease carbon emissions and negative environmental impacts of various pollutants, biofuel/biochemical production should be promoted for replacing fossil-based industrial processes. Utilization of abundant lignocellulosic biomass as a feedstock has recently become an attractive option. In this review, we focus on recent efforts of cell surface display using industrial microorganisms such as Escherichia coli and yeast. Cell surface display is used primarily for endowing cellulolytic activity on the host cells, and enables direct fermentation to generate useful fuels and chemicals from lignocellulosic biomass. Cell surface display systems are systematically summarized, and the drawbacks/perspectives as well as successful application of surface display for industrial biotechnology are discussed.
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Affiliation(s)
- Tsutomu Tanaka
- Department of Chemical Science and Technology, Graduate School of Engineering, Kobe University, 1-1, Rokkodaicho, Nada, Kobe 657-8501 Japan
| | - Akihiko Kondo
- Department of Chemical Science and Technology, Graduate School of Engineering, Kobe University, 1-1, Rokkodaicho, Nada, Kobe 657-8501 Japan.
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Mazzoli R, Bosco F, Mizrahi I, Bayer EA, Pessione E. Towards lactic acid bacteria-based biorefineries. Biotechnol Adv 2014; 32:1216-1236. [PMID: 25087936 DOI: 10.1016/j.biotechadv.2014.07.005] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 07/14/2014] [Accepted: 07/16/2014] [Indexed: 10/25/2022]
Abstract
Lactic acid bacteria (LAB) have long been used in industrial applications mainly as starters for food fermentation or as biocontrol agents or as probiotics. However, LAB possess several characteristics that render them among the most promising candidates for use in future biorefineries in converting plant-derived biomass-either from dedicated crops or from municipal/industrial solid wastes-into biofuels and high value-added products. Lactic acid, their main fermentation product, is an attractive building block extensively used by the chemical industry, owing to the potential for production of polylactides as biodegradable and biocompatible plastic alternative to polymers derived from petrochemicals. LA is but one of many high-value compounds which can be produced by LAB fermentation, which also include biofuels such as ethanol and butanol, biodegradable plastic polymers, exopolysaccharides, antimicrobial agents, health-promoting substances and nutraceuticals. Furthermore, several LAB strains have ascertained probiotic properties, and their biomass can be considered a high-value product. The present contribution aims to provide an extensive overview of the main industrial applications of LAB and future perspectives concerning their utilization in biorefineries. Strategies will be described in detail for developing LAB strains with broader substrate metabolic capacity for fermentation of cheaper biomass.
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Affiliation(s)
- Roberto Mazzoli
- Laboratory of Biochemistry: Proteomics and Metabolic Engineering of Prokaryotes, Department of Life Sciences and Systems Biology, University of Torino, Via Accademia Albertina 13, 10123 Torino, Italy.
| | - Francesca Bosco
- Department of Applied Science and Technology (DISAT), Politecnico of Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.
| | - Itzhak Mizrahi
- Institute of Animal Science, ARO, Volcani Research Center, P.O. Box 6Â, Bet Dagan 50-250, Israel.
| | - Edward A Bayer
- Department of Biological Chemistry, the Weizmann Institute of Science, Rehovot 76100 Israel.
| | - Enrica Pessione
- Laboratory of Biochemistry: Proteomics and Metabolic Engineering of Prokaryotes, Department of Life Sciences and Systems Biology, University of Torino, Via Accademia Albertina 13, 10123 Torino, Italy.
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