1
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Soumya MP, Parameswaran R, Madhavan Nampoothiri K. Nisin controlled homologous Over-expression of an exopolysaccharide biosynthetic glycosyltransferase gene for enhanced EPS production in Lactobacillus plantarum BR2. BIORESOURCE TECHNOLOGY 2023; 385:129387. [PMID: 37364650 DOI: 10.1016/j.biortech.2023.129387] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 06/20/2023] [Accepted: 06/21/2023] [Indexed: 06/28/2023]
Abstract
Glycosyltransferases synthesize a variety of exopolysaccharides (EPS) with different properties by altering the type of glycosidic linkage, degree of branching, length, mass, and conformation of the polymers. The genome analysis of an EPS-producing, Lactobacillus plantarum BR2 (Accession No: MN176402) showed twelve glycosyltransferase genes, and the gene BR2gtf (1116 bp), annotated as an EPS biosynthetic glycosyltransferase was cloned into the pNZ8148 vector. The recombinant pNZ8148 vector along with pNZ9530, a regulatory plasmid, were electroporated to L. plantarum BR2 for the over-expression of gtf gene under a nisin-controlled expression system and the glycosyltransferase activity of the recombinant and the wild-type strains were analysed. The recombinant strain showed 54.4% increase in EPS production with the maximum EPS production of 23.2 ± 0.5 g/L in a 5 L bioreactor study after 72 h of fermentation. This study shows an effective molecular strategy possibly to be adopted in lactic acid bacteria to enhance exopolysaccharide production.
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Affiliation(s)
- M P Soumya
- Microbial Processes and Technology Division, CSIR- National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum, Kerala 695 019, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Reeba Parameswaran
- Microbial Processes and Technology Division, CSIR- National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum, Kerala 695 019, India
| | - K Madhavan Nampoothiri
- Microbial Processes and Technology Division, CSIR- National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum, Kerala 695 019, India.
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2
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Kim MJ, Kim TJ, Kang YJ, Yoo JY, Kim JH. Construction of a Novel Shuttle Vector for Tetragenococcus species based on a Cryptic Plasmid from Tetragenococcus halophilus. J Microbiol Biotechnol 2023; 33:211-218. [PMID: 36575862 PMCID: PMC9998201 DOI: 10.4014/jmb.2209.09024] [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: 09/15/2022] [Revised: 11/30/2022] [Accepted: 12/19/2022] [Indexed: 12/29/2022]
Abstract
A cryptic plasmid (pTH32) was characterized from Tetragenococcus halophilus 32, an isolate from jeotgal, Korean traditional fermented seafood. pTH32 is 3,198 bp in size with G+C content of 35.84%, and contains 4 open reading frames (ORFs). orf1 and orf2 are 456 bp and 273 bp in size, respectively, and their translation products showed 65.16% and 69.35% similarities with RepB family plasmid replication initiators, respectively, suggesting the rolling-circle replication (RCR) mode of pTH32. orf3 and orf4 encodes putative hypothetical protein of 186 and 76 amino acids, respectively. A novel Tetragenococcus-Escherichia coli shuttle vector, pMJ32E (7.3 kb, Emr), was constructed by ligation of pTH32 with pBluescript II KS(+) and an erythromycin resistance gene (ErmC). pMJ32E successfully replicated in Enterococcus faecalis 29212 and T. halophilus 31 but not in other LAB species. A pepA gene, encoding aminopeptidase A (PepA) from T. halophilus CY54, was successfully expressed in T. halophilus 31 using pMJ32E. The transformant (TF) showed higher PepA activity (49.8 U/mg protein) than T. halophilus 31 cell (control). When T. halophilus 31 TF was subculturd in MRS broth without antibiotic at 48 h intervals, 53.8% of cells retained pMJ32E after 96 h, and only 2.4% of cells retained pMJ32E after 14 days, supporting the RCR mode of pTH32. pMJ32E could be useful for the genetic engineering of Tetragenococcus and Enterococcus species.
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Affiliation(s)
- Min Jae Kim
- Division of Applied Life Science (BK21 Four), Graduate School, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Tae Jin Kim
- Division of Applied Life Science (BK21 Four), Graduate School, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Yun Ji Kang
- Division of Applied Life Science (BK21 Four), Graduate School, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Ji Yeon Yoo
- Division of Applied Life Science (BK21 Four), Graduate School, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Jeong Hwan Kim
- Division of Applied Life Science (BK21 Four), Graduate School, Gyeongsang National University, Jinju 52828, Republic of Korea.,Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea
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3
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Kim SY, Kim SA, Jang YJ, Seo SO, Han NS. Screening of endogenous strong promoters of Leuconostoc citreum EFEL2700 based on transcriptome analysis and its application for food-grade production of β-galactosidase. J Biotechnol 2020; 325:1-6. [PMID: 33278464 DOI: 10.1016/j.jbiotec.2020.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 12/14/2022]
Abstract
Leuconostoc citreum is a heterofermentative lactic acid bacterium frequently found in the various fermented foods. L. citreum EFEL2700 isolated from Korean kimchi has been used as a host strain for biotechnological applications. For the use as a food-grade host to over-produce food ingredients or enzymes, strong endogenous promoters guarantying high expression levels of target genes are necessary. In this study, transcriptomic analysis of L. citreum EFEL2700 was performed using RNA-Seq and three promoters of the most highly expressed genes were selected: glyceraldehyde 3-phosphate dehydrogenase (G3PD), 6-phosphogluconate dehydrogenase (6PGD), and phosphoketolase (PPK). Thereafter, they were used as promoters to express β-galactosidase gene from Lactobacillus plantarum WCFS1 in L. citreum EFEL2700 and the levels were compared with the control promoter P710 from L. mesenteroides ATCC 8293. As results, the β-galactosidase activities of the transformants were 2.73, 0.27, 37.43, and 9.25 units/mg under the P710, G3PD, 6PGD, and PPK promoters, respectively. The expression level of endogenous promoter 6PGD was superior to the heterologous P710 promoter previously used in a Leuconostoc-Escherichia coli shuttle vector. The 6PGD developed in this study can be used as the most suitable promoter for β-galactosidase expression in L. citreum EFEL2700.
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Affiliation(s)
- Seo Yeon Kim
- Brain Korea 21 Center for Bio-resource Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Seul-Ah Kim
- Brain Korea 21 Center for Bio-resource Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Ye-Ji Jang
- Brain Korea 21 Center for Bio-resource Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Seung-Oh Seo
- Department of Food Science and Nutrition, The Catholic University of Korea, Bucheon, 14662, Republic of Korea.
| | - Nam Soo Han
- Brain Korea 21 Center for Bio-resource Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea.
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4
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Wang C, Cui Y, Qu X. Optimization of electrotransformation (ETF) conditions in lactic acid bacteria (LAB). J Microbiol Methods 2020; 174:105944. [DOI: 10.1016/j.mimet.2020.105944] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 05/11/2020] [Accepted: 05/11/2020] [Indexed: 10/24/2022]
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5
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Jang Y, Kim S, Seo S, Li L, Han N. Plasmid curing resulted in improved heterologous gene expression inLeuconostoc citreumEFEL2700. Lett Appl Microbiol 2019; 68:430-436. [DOI: 10.1111/lam.13118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 01/11/2019] [Accepted: 01/15/2019] [Indexed: 01/26/2023]
Affiliation(s)
- Y.‐J. Jang
- Brain Korea 21 Center for Bio‐Resource Development Division of Animal, Horticultural, and Food Sciences Chungbuk National University Cheongju Korea
| | - S.‐A. Kim
- Brain Korea 21 Center for Bio‐Resource Development Division of Animal, Horticultural, and Food Sciences Chungbuk National University Cheongju Korea
| | - S.‐O. Seo
- Bio Technology Institute (BTI) University of Minnesota Twin Cities MN USA
| | - L. Li
- Zhejiang Provincial Key Laboratory for Chemistry and Biology Processing Technology of Farm Produces School of Biological and Chemical Engineering Zhejiang University of Science and Technology Hangzhou Zhejiang China
| | - N.S. Han
- Brain Korea 21 Center for Bio‐Resource Development Division of Animal, Horticultural, and Food Sciences Chungbuk National University Cheongju Korea
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6
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Kim SA, Jang YJ, Heo JE, Li L, Moon JS, Han NS. Complete genome sequence of Leuconostoc citreum EFEL2700, a host strain for transformation of pCB vectors. J Biotechnol 2018; 287:52-58. [DOI: 10.1016/j.jbiotec.2018.08.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Revised: 08/01/2018] [Accepted: 08/20/2018] [Indexed: 12/19/2022]
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7
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Maeno S, Kajikawa A, Dicks L, Endo A. Introduction of bifunctional alcohol/acetaldehyde dehydrogenase gene (adhE) in Fructobacillus fructosus settled its fructophilic characteristics. Res Microbiol 2018; 170:35-42. [PMID: 30291951 DOI: 10.1016/j.resmic.2018.09.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 09/13/2018] [Accepted: 09/21/2018] [Indexed: 10/28/2022]
Abstract
Fructophilic lactic acid bacteria (FLAB) are unique in the sense that they prefer D-fructose over D-glucose as main carbon source. If D-glucose is metabolised, electron acceptors are required and significant levels of acetate are produced. These bacteria are found in environments rich in D-fructose, such as flowers, fruits and the gastrointestinal tract of insects feeding on fructose-rich diets. Fructobacillus spp. are representatives of this unique group, and their fructophilic characteristics are well conserved. In this study, the bifunctional alcohol/acetaldehyde dehydrogenase gene (adhE) from Leuconostoc mesenteroides NRIC 1541T was cloned into a plasmid and transferred to Fructobacillus fructosus NRIC 1058T. Differences in biochemical characteristics between the parental strain (NRIC 1058T) and the transformants were compared. Strain 1-11, transformed with the adhE gene, did not show any fructophilic characteristics, and the strain grew well on D-glucose without external electron acceptors. Accumulation of acetic acid, which was originally seen in the parental strain, was replaced with ethanol in the transformed strain. Furthermore, in silico analyses revealed that strain NRIC 1058T lacked the sugar transporters/permeases and enzymes required for conversion of metabolic intermediates. This may be the reason for poor carbohydrate metabolic properties recorded for FLAB.
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Affiliation(s)
- Shintaro Maeno
- Department of Food, Aroma and Cosmetic Chemistry, Tokyo University of Agriculture, 099-2493, Hokkaido, Japan.
| | - Akinobu Kajikawa
- Department of Agricultural Chemistry, Tokyo University of Agriculture, 156-0083, Tokyo, Japan.
| | - Leon Dicks
- Department of Microbiology, University of Stellenbosch, Private Bag X1, 7602, Matieland, South Africa.
| | - Akihito Endo
- Department of Food, Aroma and Cosmetic Chemistry, Tokyo University of Agriculture, 099-2493, Hokkaido, Japan.
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8
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Jang SH, Cha JW, Han NS, Jeong KJ. Development of bicistronic expression system for the enhanced and reliable production of recombinant proteins in Leuconostoc citreum. Sci Rep 2018; 8:8852. [PMID: 29891982 PMCID: PMC5995908 DOI: 10.1038/s41598-018-27091-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 05/22/2018] [Indexed: 01/13/2023] Open
Abstract
The lactic acid bacteria (LAB) Leuconostoc citreum are non-sporulating hetero-fermentative bacteria that play an important role in the fermented food industry. In this study, for the enhanced and reliable production of recombinant proteins in L. citreum, we developed a bicistronic design (BCD) expression system which includes a short leader peptide (1st cistron) followed by target genes (2nd cistron) under the control of a single promoter. Using superfolder green fluorescent protein (sfGFP) as a reporter, the functionality of BCD in L. citreum was verified. Further, to improve the expression in BCD, we tried to engineer a Shine-Dalgarno sequence (SD2) for the 2nd cistron and a promoter by FACS screening of random libraries, and both strong SD2 (eSD2) and promoter (P710V4) were successfully isolated. The usefulness of the engineered BCD with P710V4 and eSD2 was further validated using three model proteins—glutathione-s-transferase, human growth hormone, and α-amylase. All examined proteins were successfully produced with levels highly increased compared with those in the original BCD as well as the monocistronic design (MCD) expression system.
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Affiliation(s)
- Seung Hoon Jang
- Department of Chemical and Biomolecular Engineering (BK21 Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Ji Won Cha
- Department of Chemical and Biomolecular Engineering (BK21 Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Nam Soo Han
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural and Food Sciences, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Ki Jun Jeong
- Department of Chemical and Biomolecular Engineering (BK21 Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea. .,KAIST Institute for the BioCentury, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
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9
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Elimination of the cryptic plasmid in Leuconostoc citreum by CRISPR/Cas9 system. J Biotechnol 2017; 251:151-155. [DOI: 10.1016/j.jbiotec.2017.04.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 03/15/2017] [Accepted: 04/16/2017] [Indexed: 01/21/2023]
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10
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Yildirim S, Thompson MG, Jacobs AC, Zurawski DV, Kirkup BC. Evaluation of Parameters for High Efficiency Transformation of Acinetobacter baumannii. Sci Rep 2016; 6:22110. [PMID: 26911658 PMCID: PMC4766488 DOI: 10.1038/srep22110] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 02/03/2016] [Indexed: 11/09/2022] Open
Abstract
Acinetobacter baumannii is an emerging, nosocomial pathogen that is poorly characterized due to a paucity of genetic tools and methods. While whole genome sequence data from several epidemic and environmental strains have recently become available, the functional characterization of genes is significantly lagging. Efficient transformation is one of the first steps to develop molecular tools that can be used to address these shortcomings. Here we report parameters allowing high efficiency transformation of A. baumannii. Using a multi-factorial experimental design we found that growth phase, voltage, and resistance all significantly contribute to transformation efficiency. The highest efficiency (4.3 × 10(8) Transformants/μg DNA) was obtained at the stationary growth phase of the bacterium (OD 6.0) using 25 ng of plasmid DNA under 100 Ohms resistance and 1.7 kV/cm voltage. The optimized electroporation parameters reported here provide a useful tool for genetic manipulation of A. baumannii.
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Affiliation(s)
- Suleyman Yildirim
- Department of Wound Infections, Bacterial Diseases Walter Reed Army Institute of Research, Silver Spring, Maryland, USA
| | - Mitchell G Thompson
- Department of Wound Infections, Bacterial Diseases Walter Reed Army Institute of Research, Silver Spring, Maryland, USA
| | - Anna C Jacobs
- Department of Wound Infections, Bacterial Diseases Walter Reed Army Institute of Research, Silver Spring, Maryland, USA
| | - Daniel V Zurawski
- Department of Wound Infections, Bacterial Diseases Walter Reed Army Institute of Research, Silver Spring, Maryland, USA
| | - Benjamin C Kirkup
- Department of Wound Infections, Bacterial Diseases Walter Reed Army Institute of Research, Silver Spring, Maryland, USA.,Department of Medicine, Infectious Diseases Division, Uniformed Services University of the Health Sciences, F. Edward Hebert School of Medicine, Bethesda, Maryland, USA
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11
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Son YJ, Ryu AJ, Li L, Han NS, Jeong KJ. Development of a high-copy plasmid for enhanced production of recombinant proteins in Leuconostoc citreum. Microb Cell Fact 2016; 15:12. [PMID: 26767787 PMCID: PMC4714500 DOI: 10.1186/s12934-015-0400-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Accepted: 12/16/2015] [Indexed: 11/17/2022] Open
Abstract
Background Leuconostoc is a hetero-fermentative lactic acid bacteria, and its importance is widely recognized in the dairy industry. However, due to limited genetic tools including plasmids for Leuconostoc, there has not been much extensive research on the genetics and engineering of Leuconostoc yet. Thus, there is a big demand for high-copy-number plasmids for useful gene manipulation and overproduction of recombinant proteins in Leuconostoc. Results Using an existing low-copy plasmid, the copy number of plasmid was increased by random mutagenesis followed by FACS-based high-throughput screening. First, a random library of plasmids was constructed by randomizing the region responsible for replication in Leuconostoc citreum; additionally, a superfolder green fluorescent protein (sfGFP) was used as a reporter protein. With a high-speed FACS sorter, highly fluorescent cells were enriched, and after two rounds of sorting, single clone exhibiting the highest level of sfGFP was isolated. The copy number of the isolated plasmid (pCB4270) was determined by quantitative PCR (qPCR). It was found that the isolated plasmid has approximately a 30-fold higher copy number (approx. 70 copies per cell) than that of the original plasmid. From the sequence analysis, a single mutation (C→T) at position 4690 was found, and we confirmed that this single mutation was responsible for the increased plasmid copy number. The effectiveness of the isolated high-copy-number plasmid for the overproduction of recombinant proteins was successfully demonstrated with two protein models Glutathione-S-transferase (GST) and α–amylase. Conclusions The high-copy number plasmid was successfully isolated by FACS-based high-throughput screening of a plasmid library in L. citreum. The isolated plasmid could be a useful genetic tool for high-level gene expression in Leuconostoc, and for extending the applications of this useful bacteria to various areas in the dairy and pharmaceutical industries.
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Affiliation(s)
- Yeon Jeong Son
- Department of Chemical and Biomolecular Engineering, BK21 Plus PROGRAM, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
| | - Ae Jin Ryu
- Department of Chemical and Biomolecular Engineering, BK21 Plus PROGRAM, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
| | - Ling Li
- Division of Animal, Horticultural and Food Sciences, Brain Korea 21 Center for Bio-Resource Development, Chungbuk National University, Cheongju, 28644, Republic of Korea.
| | - Nam Soo Han
- Division of Animal, Horticultural and Food Sciences, Brain Korea 21 Center for Bio-Resource Development, Chungbuk National University, Cheongju, 28644, Republic of Korea.
| | - Ki Jun Jeong
- Department of Chemical and Biomolecular Engineering, BK21 Plus PROGRAM, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea. .,Institute for the BioCentury, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
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12
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Jin Q, Li L, Moon JS, Cho SK, Kim YJ, Lee SJ, Han NS. Reduction of D-lactate content in sauerkraut using starter cultures of recombinant Leuconostoc mesenteroides expressing the ldhL gene. J Biosci Bioeng 2015; 121:479-83. [PMID: 26472127 DOI: 10.1016/j.jbiosc.2015.09.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 07/18/2015] [Accepted: 09/11/2015] [Indexed: 10/22/2022]
Abstract
The D-form of lactate, which causes metabolic stress upon excessive dietary intake, is mainly produced by Leuconostoc sp., the predominant species in sauerkraut. To shift the metabolic flux of d-lactate from pyruvate to l-lactate, we expressed the l-lactate dehydrogenase (ldhL) gene in Leuconostoc mesenteroides ATCC 8293. The ldhL gene from Lactobacillus plantarum was introduced into L. mesenteroides using the shuttle vectors pLeuCM and pLeuCM42. To elevate the expression level of ldhL in L. mesenteroides, the nucleotides for pyruvate kinase promoter were fused to ldhL and cloned into above vectors to construct pLC18pkL and pLC42pkL. As results, introduction of pLC42pkL in L. mesenteroides significantly improved both l-LDH activity and l-lactate productivity during fermentation, decreasing the d-/l-lactate ratio. When used as a starter culture for sauerkraut fermentation, recombinant L. mesenteroides harboring pLC42pkL increased l-lactate concentration and decreased d-lactate concentration compared to the wild type strain. We newly developed a recombinant L. mesenteroides which has high l-lactate dehydrogenase activity and applied this strain to minimize the harmful effect of d-lactate during the sauerkraut fermentation. To the best of our knowledge, we demonstrate for the first time the effective use of recombinant Leuconostoc sp. for quality improvement of fermented foods.
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Affiliation(s)
- Qing Jin
- Department of Food Science, Yanbian University, Yanji, Jilin 133002, China
| | - Ling Li
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural and Food Sciences, Chungbuk National University, Cheongju 361-763, South Korea
| | - Jin Seok Moon
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural and Food Sciences, Chungbuk National University, Cheongju 361-763, South Korea
| | - Seung Kee Cho
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural and Food Sciences, Chungbuk National University, Cheongju 361-763, South Korea
| | - Yu Jin Kim
- Department of Milk Processing Research Team, Korea Yakult, Youngin 446-901, South Korea
| | - Soo Jin Lee
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural and Food Sciences, Chungbuk National University, Cheongju 361-763, South Korea
| | - Nam Soo Han
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural and Food Sciences, Chungbuk National University, Cheongju 361-763, South Korea.
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13
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Rodríguez MC, Alegre MT, Martín MC, Mesas JM. The use of the replication region of plasmid pRS7 from Oenococcus oeni as a putative tool to generate cloning vectors for lactic acid bacteria. Plasmid 2014; 77:28-31. [PMID: 25479060 DOI: 10.1016/j.plasmid.2014.11.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Revised: 11/11/2014] [Accepted: 11/26/2014] [Indexed: 11/18/2022]
Abstract
A chimeric plasmid, pRS7Rep (6.1 kb), was constructed using the replication region of pRS7, a large plasmid from Oenococcus oeni, and pEM64, a plasmid derived from pIJ2925 and containing a gene for resistance to chloramphenicol. pRS7Rep is a shuttle vector that replicates in Escherichia coli using its pIJ2925 component and in lactic acid bacteria (LAB) using the replication region of pRS7. High levels of transformants per µg of DNA were obtained by electroporation of pRS7Rep into Pediococcus acidilactici (1.5 × 10(7)), Lactobacillus plantarum (5.7 × 10(5)), Lactobacillus casei (2.3 × 10(5)), Leuconostoc citreum (2.7 × 10(5)), and Enterococcus faecalis (2.4 × 10(5)). A preliminary optimisation of the technical conditions of electrotransformation showed that P. acidilactici and L. plantarum are better transformed at a later exponential phase of growth, whereas L. casei requires the early exponential phase for better electrotransformation efficiency. pRS7Rep contains single restriction sites useful for cloning purposes, BamHI, XbaI, SalI, HincII, SphI and PstI, and was maintained at an acceptable rate (>50%) over 100 generations without selective pressure in L. plantarum, but was less stable in L. casei and P. acidilactici. The ability of pRS7Rep to accept and express other genes was assessed. To the best of our knowledge, this is the first time that the replication region of a plasmid from O. oeni has been used to generate a cloning vector.
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Affiliation(s)
- M Carmen Rodríguez
- Departamento de Fisiología Vegetal, Escuela Politécnica Superior, Universidad de Santiago de Compostela, 27002 Lugo, Spain
| | - M Teresa Alegre
- Departamento de Microbiología y Parasitología, Escuela Politécnica Superior, Universidad de Santiago de Compostela, 27002 Lugo, Spain
| | - M Cruz Martín
- Instituto de Productos Lácteos de Asturias, IPLA-CSIC, Paseo Río Linares s/n, 33300-Villaviciosa, Asturias, Spain
| | - Juan M Mesas
- Departamento de Química Analítica, Nutrición y Bromatología (Área de Tecnología de Alimentos), Escuela Politécnica Superior, Universidad de Santiago de Compostela, 27002 Lugo, Spain.
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14
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Lu S, Nie Y, Tang YQ, Xiong G, Wu XL. A critical combination of operating parameters can significantly increase the electrotransformation efficiency of a gram-positive Dietzia strain. J Microbiol Methods 2014; 103:144-51. [DOI: 10.1016/j.mimet.2014.05.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 05/22/2014] [Accepted: 05/22/2014] [Indexed: 12/21/2022]
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15
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Jin Q, Li L, Kim Y, Han N. Construction of a dextran-free Leuconostoc citreum
mutant by targeted disruption of the dextransucrase gene. J Appl Microbiol 2014; 117:1104-12. [DOI: 10.1111/jam.12587] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 06/18/2014] [Accepted: 06/20/2014] [Indexed: 01/25/2023]
Affiliation(s)
- Q. Jin
- Department of Food Science; Yanbian University; Yanji Jilin China
| | - L. Li
- Brain Korea 21 Center for Bio-Resource Development; Division of Animal, Horticultural, and Food Sciences; Chungbuk National University; Cheongju Korea
| | - Y.J. Kim
- Department of Milk Processing Research Team; Korea Yakult; Youngin Korea
| | - N.S. Han
- Brain Korea 21 Center for Bio-Resource Development; Division of Animal, Horticultural, and Food Sciences; Chungbuk National University; Cheongju Korea
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