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Konishi K, Yasutake Y, Muramatsu S, Murata S, Yoshida K, Ishiya K, Aburatani S, Sakasegawa SI, Tamura T. Disruption of SMC-related genes promotes recombinant cholesterol esterase production in Burkholderia stabilis. Appl Microbiol Biotechnol 2022; 106:8093-8110. [PMID: 36399168 DOI: 10.1007/s00253-022-12277-3] [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: 07/15/2022] [Revised: 11/01/2022] [Accepted: 11/04/2022] [Indexed: 11/19/2022]
Abstract
Burkholderia stabilis strain FERMP-21014 secretes cholesterol esterase (BsChe), which is used in clinical settings to determine serum cholesterol levels. Previously, we constructed an expression plasmid with an endogenous constitutive promoter to enable the production of recombinant BsChe. In this study, we obtained one mutant strain with 13.1-fold higher BsChe activity than the wild type, using N-methyl-N'-nitro-N-nitrosoguanidine as a mutagen. DNA-sequencing analysis revealed that the strain had lost chromosome 3 (∆Chr3), suggesting that the genes hindering BsChe production may be encoded on Chr3. We also identified common mutations in the functionally unknown BSFP_068720/30 genes in the top 10 active strains generated during transposon mutagenesis. As BSFP_068720/30/40 comprised an operon on Chr3, we created the BSFP_068720/30/40 disruption mutant and confirmed that each disruption mutant containing the expression plasmid exhibited ~ 16.1-fold higher BsChe activity than the wild type. Quantitative PCR showed that each disruption mutant and ΔChr3 had a ~ 9.4-fold higher plasmid copy number than the wild type. Structural prediction models indicate that BSFP_068730/40 is structurally homologous to the structural maintenance of chromosomes (SMC) protein MukBE, which is responsible for chromosome segregation during cell division. Conversely, BSFP_068720/30/40 disruption did not lead to a Chr3 drop-out. These results imply that BSFP_068720/30/40 is not a SMC protein but is involved in destabilizing foreign plasmids to prevent the influx of genetic information from the environment. In conclusion, the disruption of BSFP_068720/30/40 improved plasmid stability and copy number, resulting in exceptionally high BsChe production. KEY POINTS: • Disruption of BSFP_068720/30/40 enabled mass production of Burkholderia Che/Lip. • BSFP_068730/40 is an SMC protein homolog not involved in chromosome retention. • BSFP_068720/30/40 is likely responsible for the exclusion of exogenous plasmids.
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Affiliation(s)
- Kenji Konishi
- Asahi Kasei Pharma Corporation, Shizuoka, 410-2321, Japan.,Laboratory of Molecular Environmental Microbiology, Graduate School of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan
| | - Yoshiaki Yasutake
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, 062-8517, Japan.,Computational Bio Big-Data Open Innovation Laboratory (CBBD-OIL), AIST, Tokyo, 169-8555, Japan
| | | | - Satomi Murata
- Asahi Kasei Pharma Corporation, Shizuoka, 410-2321, Japan
| | - Keitaro Yoshida
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, 062-8517, Japan
| | - Koji Ishiya
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, 062-8517, Japan
| | - Sachiyo Aburatani
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, 062-8517, Japan
| | | | - Tomohiro Tamura
- Laboratory of Molecular Environmental Microbiology, Graduate School of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan. .,Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, 062-8517, Japan.
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Chen Y, Gao F, Zheng G, Gao S. Enantioselective synthesis of a chiral intermediate of himbacine analogs by Burkholderia cepacia lipase A. Biotechnol Lett 2020; 42:2643-2651. [DOI: 10.1007/s10529-020-02969-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 07/13/2020] [Indexed: 10/23/2022]
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Yoshida K, Konishi K, Magana-Mora A, Rougny A, Yasutake Y, Muramatsu S, Murata S, Kumagai T, Aburatani S, Sakasegawa SI, Tamura T. Production of recombinant extracellular cholesterol esterase using consistently active promoters in Burkholderia stabilis. Biosci Biotechnol Biochem 2019; 83:1974-1984. [DOI: 10.1080/09168451.2019.1630256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
ABSTRACT
Burkholderia stabilis FERMP-21014 produces highly active cholesterol esterase in the presence of fatty acids. To develop an overexpression system for cholesterol esterase production, we carried out RNA sequencing analyses to screen strongly active promoters in FERMP-21014. Based on gene expression consistency analysis, we selected nine genes that were consistently expressed at high levels, following which we constructed expression vectors using their promoter sequences and achieved overproduction of extracellular cholesterol esterase under fatty acid-free conditions. Of the tested promoters, the promoter of BSFP_0720, which encodes the alkyl hydroperoxide reductase subunit AhpC, resulted in the highest cholesterol esterase activity (24.3 U mL−1). This activity level was 243-fold higher than that of the wild-type strain under fatty acid-free conditions. We confirmed that cholesterol esterase was secreted without excessive accumulation within the cells. The gene expression consistency analysis will be useful to screen promoters applicable to the overexpression of other industrially important enzymes.
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Affiliation(s)
- Keitaro Yoshida
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, Japan
| | | | - Arturo Magana-Mora
- Biotechnology Research Institute for Drug Discovery, AIST, Tokyo, Japan
- Computational Bio Big-Data Open Innovation Laboratory (CBBD-OIL), AIST, Tokyo, Japan
| | - Adrien Rougny
- Biotechnology Research Institute for Drug Discovery, AIST, Tokyo, Japan
- Computational Bio Big-Data Open Innovation Laboratory (CBBD-OIL), AIST, Tokyo, Japan
| | - Yoshiaki Yasutake
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, Japan
- Computational Bio Big-Data Open Innovation Laboratory (CBBD-OIL), AIST, Tokyo, Japan
| | | | | | | | - Sachiyo Aburatani
- Biotechnology Research Institute for Drug Discovery, AIST, Tokyo, Japan
- Computational Bio Big-Data Open Innovation Laboratory (CBBD-OIL), AIST, Tokyo, Japan
| | | | - Tomohiro Tamura
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, Japan
- Computational Bio Big-Data Open Innovation Laboratory (CBBD-OIL), AIST, Tokyo, Japan
- Graduate School of Agriculture, Hokkaido University, Sapporo, Japan
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Knapp A, Voget S, Gao R, Zaburannyi N, Krysciak D, Breuer M, Hauer B, Streit WR, Müller R, Daniel R, Jaeger KE. Mutations improving production and secretion of extracellular lipase by Burkholderia glumae PG1. Appl Microbiol Biotechnol 2016; 100:1265-1273. [PMID: 26476653 PMCID: PMC4717159 DOI: 10.1007/s00253-015-7041-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 09/15/2015] [Accepted: 09/24/2015] [Indexed: 01/05/2023]
Abstract
Burkholderia glumae is a Gram-negative phytopathogenic bacterium known as the causative agent of rice panicle blight. Strain B. glumae PG1 is used for the production of a biotechnologically relevant lipase, which is secreted into the culture supernatant via a type II secretion pathway. We have comparatively analyzed the genome sequences of B. glumae PG1 wild type and a lipase overproducing strain obtained by classical strain mutagenesis. Among a total number of 72 single nucleotide polymorphisms (SNPs) identified in the genome of the production strain, two were localized in front of the lipAB operon and were analyzed in detail. Both mutations contribute to a 100-fold overproduction of extracellular lipase in B. glumae PG1 by affecting transcription of the lipAB operon and efficiency of lipase secretion. We analyzed each of the two SNPs separately and observed a stronger influence of the promoter mutation than of the signal peptide modification but also a cumulative effect of both mutations. Furthermore, fusion of the mutated LipA signal peptide resulted in a 2-fold increase in secretion of the heterologous reporter alkaline phosphatase from Escherichia coli.
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Affiliation(s)
- Andreas Knapp
- Institute of Molecular Enzyme Technology, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Sonja Voget
- Institute of Microbiology and Genetics, Department of Genomic and Applied Microbiology and Göttingen Genomics Laboratory, Georg-August University Göttingen, Göttingen, Germany
| | - Rong Gao
- Biocenter Klein Flottbek, Department of Microbiology and Biotechnology, University of Hamburg, Hamburg, Germany
| | - Nestor Zaburannyi
- Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Pharmaceutical Biotechnology, Saarland University, Saarbrücken, Germany
| | - Dagmar Krysciak
- Biocenter Klein Flottbek, Department of Microbiology and Biotechnology, University of Hamburg, Hamburg, Germany
| | - Michael Breuer
- BASF SE, Biocatalysis and Fine Chemicals Research, Ludwigshafen, Germany
| | - Bernhard Hauer
- BASF SE, Biocatalysis and Fine Chemicals Research, Ludwigshafen, Germany
- Institute of Technical Biochemistry, University of Stuttgart, Stuttgart, Germany
| | - Wolfgang R Streit
- Biocenter Klein Flottbek, Department of Microbiology and Biotechnology, University of Hamburg, Hamburg, Germany
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Pharmaceutical Biotechnology, Saarland University, Saarbrücken, Germany
| | - Rolf Daniel
- Institute of Microbiology and Genetics, Department of Genomic and Applied Microbiology and Göttingen Genomics Laboratory, Georg-August University Göttingen, Göttingen, Germany
| | - Karl-Erich Jaeger
- Institute of Molecular Enzyme Technology, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany.
- Forschungszentrum Jülich GmbH, Institute of Bio- and Geosciences IBG-1: Biotechnology, Jülich, Germany.
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Madan B, Mishra P. Co-expression of the lipase and foldase of Pseudomonas aeruginosa to a functional lipase in Escherichia coli. Appl Microbiol Biotechnol 2009; 85:597-604. [PMID: 19629472 DOI: 10.1007/s00253-009-2131-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2008] [Revised: 07/06/2009] [Accepted: 07/06/2009] [Indexed: 11/30/2022]
Abstract
The lipA gene, a structural gene encoding for protein of molecular mass 48 kDa, and lipB gene, encoding for a lipase-specific chaperone with molecular mass of 35 kDa, of Pseudomonas aeruginosa B2264 were co-expressed in heterologous host Escherichia coli BL21 (DE3) to obtain in vivo expression of functional lipase. The recombinant lipase was expressed with histidine tag at its N terminus and was purified to homogeneity using nickel affinity chromatography. The amino acid sequence of LipA and LipB of P. aeruginosa B2264 was 99-100% identical with the corresponding sequence of LipA and LipB of P. aeruginosa LST-03 and P. aeruginosa PA01, but it has less identity with Pseudomonas cepacia (Burkholderia cepacia) as it showed only 37.6% and 23.3% identity with the B. cepacia LipA and LipB sequence, respectively. The molecular mass of the recombinant lipase was found to be 48 kDa. The recombinant lipase exhibited optimal activity at pH 8.0 and 37 degrees C, though it was active between pH 5.0 and pH 9.0 and up to 45 degrees C. K (m) and V (max) values for recombinant P. aeruginosa lipase were found to be 151.5 +/- 29 microM and 217 +/- 22.5 micromol min(-1) mg(-1) protein, respectively.
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Affiliation(s)
- Bhawna Madan
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India
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