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Łubkowska B, Czajkowska E, Stodolna A, Sroczyński M, Zylicz-Stachula A, Sobolewski I, Skowron PM. A novel thermostable TP-84 capsule depolymerase: a method for rapid polyethyleneimine processing of a bacteriophage-expressed proteins. Microb Cell Fact 2023; 22:80. [PMID: 37098567 PMCID: PMC10131341 DOI: 10.1186/s12934-023-02086-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 04/09/2023] [Indexed: 04/27/2023] Open
Abstract
BACKGROUND In spite of the fact that recombinant enzymes are preferably biotechnologically obtained using recombinant clones, the purification of proteins from native microorganisms, including those encoded by bacteriophages, continues. The native bacteriophage protein isolation is often troubled by large volumes of the infected bacterial cell lysates needed to be processed, which is highly undesired in scaled-up industrial processing. A well-known ammonium sulphate fractionation is often a method of choice during purification of the native bacteriophage protein. However, this method is time-consuming and cumbersome, and requires large amounts of the relatively expensive reagent. Thus, other effective and inexpensive methods of reversible protein precipitation are highly desirable. We have previously characterized thermophilic TP-84 bacteriophage, defined a new genus TP84virus within Siphoviridae family, conducted the TP-84 genome annotation and proteomic analysis. The longest Open Reading Frame (ORF) identified in the genome is TP84_26. We have previously annotated this ORF as a hydrolytic enzyme depolymerizing the thick polysaccharides host's capsule. RESULTS The TP84_26 'capsule depolymerase' (depolymerase) is a large, 112 kDa protein, biosynthesized by the infected Geobacillus stearothermophilus 10 (G. stearothermophilus 10) cells. The TP84_26 protein biosynthesis was confirmed by three approaches: (i) purification of the protein of the expected size; (ii) mass spectrometry (LC-MS) analysis and (iii) detection of the enzymatic activity toward G. stearothermophilus polysaccharide capsules. Streptomycin-resistant mutant of the host was generated and microbiological aspects of both the TP-84 and G. stearothermophilus 10 were determined. A new variant of polyethyleneimine (PEI)-mediated purification method was developed, using the novel TP-84 depolymerase as a model. The enzyme was characterized. Three depolymerase forms were detected: soluble, unbound proteins in the bacteriophage/cells lysate and another integrated into the TP-84 virion. CONCLUSIONS The novel TP-84 depolymerase was purified and characterized. The enzyme exists in three forms. The soluble, unbound forms are probably responsible for the weakening of the capsules of the uninfected bacterial cells. The form integrated into virion particles may generate a local passage for the invading TP-84. The developed PEI purification method appears well suited for the scaled-up or industrial production of bacteriophage proteins.
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Affiliation(s)
- Beata Łubkowska
- Faculty of Health and Life Sciences, Division of Biochemistry, Gdansk University of Physical Education and Sport, Gorskiego 1, 80-336, Gdansk, Poland.
- Faculty of Chemistry, Department of Molecular Biotechnology, University of Gdansk, Wita Stwosza 63, 80-308, Gdansk, Poland.
| | - Edyta Czajkowska
- Faculty of Chemistry, Department of Molecular Biotechnology, University of Gdansk, Wita Stwosza 63, 80-308, Gdansk, Poland
| | - Aleksandra Stodolna
- Faculty of Chemistry, Department of Molecular Biotechnology, University of Gdansk, Wita Stwosza 63, 80-308, Gdansk, Poland
| | - Michał Sroczyński
- Faculty of Chemistry, Department of Molecular Biotechnology, University of Gdansk, Wita Stwosza 63, 80-308, Gdansk, Poland
| | - Agnieszka Zylicz-Stachula
- Faculty of Chemistry, Department of Molecular Biotechnology, University of Gdansk, Wita Stwosza 63, 80-308, Gdansk, Poland
| | - Ireneusz Sobolewski
- Faculty of Chemistry, Department of Molecular Biotechnology, University of Gdansk, Wita Stwosza 63, 80-308, Gdansk, Poland
- BioGel Sp. z o.o. (Ltd.), ul. Promienista 83, 60-141, Poznań, Poland
| | - Piotr M Skowron
- Faculty of Chemistry, Department of Molecular Biotechnology, University of Gdansk, Wita Stwosza 63, 80-308, Gdansk, Poland
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Suzuki H, Okumura Y, Mikawa Y, Takata M, Yoshimura S, Ohshiro T. Transcriptome and growth efficiency comparisons of recombinant thermophiles that produce thermolabile and thermostable proteins: implications for burden-based selection of thermostable proteins. Extremophiles 2021; 25:403-412. [PMID: 34191121 DOI: 10.1007/s00792-021-01237-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 06/24/2021] [Indexed: 11/28/2022]
Abstract
Geobacillus kaustophilus is a thermophilic bacterium that grows at temperatures ranging between 42 and 74 °C. Here, we modified this organism to produce the thermolabile protein (PyrFA) or its thermostable variant (PyrFV) and analyzed the transcriptome and growth efficiency profiles of the resultant strains. In the producer of PyrFA, the transcriptome profile was changed to facilitate ATP synthesis from NADH without pooling reduced quinones. This change implies that PyrFA production at elevated temperatures places an energy burden on cells potentially to maintain protein homeostasis. This was consistent with the observation that the PyrFA producer grew slower than the PyrFV producer at > 45 °C and had a lower cellular fitness. Similar growth profiles were also observed in the PyrFA and PyrFV producers derived from another thermophile (Geobacillus thermodenitrificans) but not in those from Escherichia coli at 30 °C. Thus, we suggest that the production of thermolabile proteins impairs host survival at higher temperatures; therefore, thermophiles are under evolutionary selection for thermostable proteins regardless of whether their functions are associated with survival advantages. This hypothesis provides new insights into evolutionary protein selection in thermophiles and suggests an engineering approach to select thermostable protein variants generated via random gene mutagenesis.
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Affiliation(s)
- Hirokazu Suzuki
- Faculty of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori, 680-8552, Japan. .,Center for Research On Green Sustainable Chemistry, Tottori University, 4-101 Koyama-Minami, Tottori, 680-8552, Japan.
| | - Yuta Okumura
- Department of Engineering, Graduate School of Sustainability Science, Tottori University, 4-101 Koyama-Minami, Tottori, 680-8552, Japan
| | - Yui Mikawa
- Faculty of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori, 680-8552, Japan
| | - Mao Takata
- Faculty of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori, 680-8552, Japan
| | - Shunsuke Yoshimura
- Department of Engineering, Graduate School of Sustainability Science, Tottori University, 4-101 Koyama-Minami, Tottori, 680-8552, Japan
| | - Takashi Ohshiro
- Faculty of Engineering, Tottori University, 4-101 Koyama-Minami, Tottori, 680-8552, Japan.,Center for Research On Green Sustainable Chemistry, Tottori University, 4-101 Koyama-Minami, Tottori, 680-8552, Japan
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Suzuki H, Taketani T, Tanabiki M, Ohara M, Kobayashi J, Ohshiro T. Frequent Transposition of Multiple Insertion Sequences in Geobacillus kaustophilus HTA426. Front Microbiol 2021; 12:650461. [PMID: 33841375 PMCID: PMC8024623 DOI: 10.3389/fmicb.2021.650461] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 03/03/2021] [Indexed: 12/15/2022] Open
Abstract
Geobacillus kaustophilus HTA426 is a thermophilic bacterium whose genome harbors numerous insertion sequences (IS). This study was initially conducted to generate mutant genes for thermostable T7 RNA polymerase in G. kaustophilus; however, relevant experiments unexpectedly identified that the organism transposed multiple IS elements and produced derivative cells that expressed a silent gene via transposition. The transposed elements were diverse and included members of the IS4, IS701, IS1634, and ISLre2 families. The transposition was relatively active at elevated temperatures and generated 4–9 bp of direct repeats at insertion sites. Transposition was more frequent in proliferative cells than in stationary cells but was comparable between both cells when sigX, which encodes an extra-cytoplasmic function sigma factor, was forcibly expressed. Southern blot analysis indicated that IS transposition occurred under growth inhibitory conditions by diverse stressors; however, IS transposition was not detected in cells that were cultured under growth non-inhibitory conditions. These observations suggest that G. kaustophilus enhances IS transposition via sigX-dependent stress responses when proliferative cells were prevented from active propagation. Considering Geobacillus spp. are highly adaptive bacteria that are remarkably distributed in diverse niches, it is possible that these organisms employ IS transposition for environmental adaptation via genetic diversification. Thus, this study provides new insights into adaptation strategies of Geobacillus spp. along with implications for strong codependence between mobile genetic elements and highly adaptive bacteria for stable persistence and evolutionary diversification, respectively. This is also the first report to reveal active IS elements at elevated temperatures in thermophiles and to suggest a sigma factor that governs IS transposition.
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Affiliation(s)
- Hirokazu Suzuki
- Faculty of Engineering, Tottori University, Tottori, Japan.,Center for Research on Green Sustainable Chemistry, Tottori University, Tottori, Japan
| | - Tatsunari Taketani
- Department of Engineering, Graduate School of Sustainability Science, Tottori University, Tottori, Japan
| | - Misaki Tanabiki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, Japan
| | - Misaki Ohara
- Department of Engineering, Graduate School of Sustainability Science, Tottori University, Tottori, Japan
| | - Jyumpei Kobayashi
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, Japan
| | - Takashi Ohshiro
- Faculty of Engineering, Tottori University, Tottori, Japan.,Center for Research on Green Sustainable Chemistry, Tottori University, Tottori, Japan
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Ma R, Fang H, Liu H, Pan L, Wang H, Zhang H. Overexpression of uracil permease and nucleoside transporter from Bacillus amyloliquefaciens improves cytidine production in Escherichia coli. Biotechnol Lett 2021; 43:1211-1219. [PMID: 33646457 DOI: 10.1007/s10529-021-03103-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 02/08/2021] [Indexed: 11/28/2022]
Abstract
Cytidine is an important raw material for nucleic acid health food and genetic engineering research. In recent years, it has shown irreplaceable effects in anti-virus, anti-tumor, and AIDS drugs. Its biosynthetic pathway is complex and highly regulated. In this study, overexpression of uracil permease and a nucleoside transporter from Bacillus amyloliquefaciens related to cell membrane transport in Escherichia coli strain BG-08 was found to increase cytidine production in shake flask cultivation by 1.3-fold (0.91 ± 0.03 g/L) and 1.8-fold (1.26 ± 0.03 g/L) relative to that of the original strain (0.70 ± 0.03 g/L), respectively. Co-overexpression of uracil permease and a nucleoside transporter further increased cytidine yield by 2.7-fold (1.59 ± 0.05 g/L) compared with that of the original strain. These results indicate that the overexpressed uracil permease and nucleoside transporter can promote the accumulation of cytidine, and the two proteins play a synergistic role in the secretion of cytidine in Escherichia coli.
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Affiliation(s)
- Ruoshuang Ma
- Ningxia Key Laboratory for Food Microbial-Applications Technology and Safety Control, School of Agriculture, Ningxia University, Yinchuan, 750021, China
| | - Haitian Fang
- Ningxia Key Laboratory for Food Microbial-Applications Technology and Safety Control, School of Agriculture, Ningxia University, Yinchuan, 750021, China
| | - Huiyan Liu
- Ningxia Key Laboratory for Food Microbial-Applications Technology and Safety Control, School of Agriculture, Ningxia University, Yinchuan, 750021, China.
| | - Lin Pan
- Ningxia Key Laboratory for Food Microbial-Applications Technology and Safety Control, School of Agriculture, Ningxia University, Yinchuan, 750021, China
| | - Hongyan Wang
- Ningxia Key Laboratory for Food Microbial-Applications Technology and Safety Control, School of Agriculture, Ningxia University, Yinchuan, 750021, China
| | - Heng Zhang
- Ningxia Key Laboratory for Food Microbial-Applications Technology and Safety Control, School of Agriculture, Ningxia University, Yinchuan, 750021, China
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Han S, Gong Z, Liang T, Chen Y, Xie J. The role of Mfd in Mycobacterium tuberculosis physiology and underlying regulatory network. Microbiol Res 2021; 246:126718. [PMID: 33588338 DOI: 10.1016/j.micres.2021.126718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 01/18/2021] [Accepted: 01/26/2021] [Indexed: 12/23/2022]
Abstract
Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis with millions of deaths annually, remains one of the most formidable pathogen to global public health. As the most successful intracellular pathogens, Mtb can spatiotemporally coordinate the transcription and translation timely to reconcile the inevitable transcription-replication conflicts. Mutation frequency decline (Mfd) is a bacterial ATP-dependent DNA translocase that couples DNA repair to transcription via hydrolyzing ATP as energy, which preferentially acts on the damaged DNA transcribed strand to rescue stalled RNAP or dissociate RNAP to terminate the transcription depending on impediment severity, mitigating the damage to bacteria. In addition to the traditional damage repair effect, Mfd may also promote bacteria mutagenesis under stresses and boost the drug resistance. Mfd is widespread among bacteria and intensively studied, but there are very few studies in Mycobacteria, especially Mtb. In this review, the structure, function and mechanism characteristics of Mfd in Mtb (MtbMfd, Rv1020) are explored, with emphasis on the regulatory network of MtbMfd and its potential as a prime target for antibiotic drugs against tuberculosis.
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Affiliation(s)
- Shuang Han
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Ministry of Education Eco-Environment of the Three Gorges Reservoir Region, Ministry of Education, Chongqing Municipal Key Laboratory of Karst Environment, School of Life Sciences, Southwest University, Beibei, Chongqing, 400715, China
| | - Zhen Gong
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Ministry of Education Eco-Environment of the Three Gorges Reservoir Region, Ministry of Education, Chongqing Municipal Key Laboratory of Karst Environment, School of Life Sciences, Southwest University, Beibei, Chongqing, 400715, China
| | - Tian Liang
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Ministry of Education Eco-Environment of the Three Gorges Reservoir Region, Ministry of Education, Chongqing Municipal Key Laboratory of Karst Environment, School of Life Sciences, Southwest University, Beibei, Chongqing, 400715, China
| | - Yu Chen
- Department of Tuberculosis, Shenyang Tenth People's Hospital and Shenyang Chest Hospital, Shenyang, Liaoning Province, 110044, China.
| | - Jianping Xie
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Ministry of Education Eco-Environment of the Three Gorges Reservoir Region, Ministry of Education, Chongqing Municipal Key Laboratory of Karst Environment, School of Life Sciences, Southwest University, Beibei, Chongqing, 400715, China.
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Guevara Salazar JA, Morán Díaz JR, Ramírez Segura E, Trujillo Ferrara JG. What are the origins of growing microbial resistance? Both Lamarck and Darwin were right. Expert Rev Anti Infect Ther 2020; 19:563-569. [PMID: 33073640 DOI: 10.1080/14787210.2021.1839418] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
INTRODUCTION Microorganisms of clinical importance frequently develop resistance to drug therapy, now a growing problem. The experience with Mycobacterium tuberculosis is a representative example of increasing multi-drug resistance. To avoid reaching a crisis in which patients could be left without adequate treatment, a new strategy is needed. Anti-microbial therapy has historically targeted the mechanisms rather than origin of drug resistance, thus allowing microorganisms to adapt and survive. AREAS COVERED This contribution analyses the historical development (1943-2020) of the evolution of multi-drug resistance by M. tuberculosis strains in light of Darwin's and Lamarck's theories of evolution. EXPERT OPINION Regarding the molecular origin of microbial drug resistance, genetic mutations and epigenetic modifications are known to participate. The analysis of the history of drug resistance by M. tuberculosis evidences a gradual development of resistance to some antibiotics, undoubtedly due to random mutations together with natural selection based on environmental pressures (e.g., antibiotics), representing Darwin's idea. More rapid adaptation of M. tuberculosis to new antibiotic treatments has also occurred, probably because of heritable acquired characteristics, evidencing Lamarck's proposal. Therefore, microbial infections should be treated with an antibiotic producing null or low mutagenic activity along with a resistance inhibitor, preferably in a single medication.
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Affiliation(s)
- Juan Alberto Guevara Salazar
- Departamento De Farmacología, Escuela Superior De Medicina, Instituto Politécnico Nacional, Ciudad De México, CDMX, Mexico
| | - Jessica Rubí Morán Díaz
- Departamento De Farmacología, Escuela Superior De Medicina, Instituto Politécnico Nacional, Ciudad De México, CDMX, Mexico
| | - Enrique Ramírez Segura
- Laboratorio De Bioquímica Médica, Escuela Superior De Medicina, Instituto Politécnico Nacional, Ciudad De México, CDMX, Mexico
| | - José Guadalupe Trujillo Ferrara
- Laboratorio De Bioquímica Médica, Escuela Superior De Medicina, Instituto Politécnico Nacional, Ciudad De México, CDMX, Mexico
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Peculiarities and biotechnological potential of environmental adaptation by Geobacillus species. Appl Microbiol Biotechnol 2018; 102:10425-10437. [PMID: 30310966 DOI: 10.1007/s00253-018-9422-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 09/25/2018] [Accepted: 09/26/2018] [Indexed: 12/21/2022]
Abstract
The genus Geobacillus comprises thermophilic bacilli capable of endospore formation. The members of this genus provide thermostable proteins and can be used in whole cell applications at elevated temperatures; therefore, these organisms are of biotechnological importance. While these applications have been described in previous reviews, the present paper highlights the environmental adaptations and genome diversifications of Geobacillus spp. and their applications in evolutionary-protein engineering. Despite their obligate thermophilic properties, Geobacillus spp. are widely distributed in nature. Because several isolates demonstrate remarkable properties for cell reproduction in their respective niches, they seem to exist not only as endospores but also as vegetative cells in diverse environments. This suggests their excellence in environmental adaptation via genome diversification; in fact, evidence suggests that Geobacillus spp. were derived from Bacillus spp. while diversifying their genomes via horizontal gene transfer. Moreover, when subjected to an environmental stressor, Geobacillus spp. diversify their genomes using inductive mutations and transposable elements to produce derivative cells that are adaptive to the stressor. Notably, inductive mutations in Geobacillus spp. occur more rapidly and frequently than the stress-induced mutagenesis observed in other microorganisms. Owing to this, Geobacillus spp. can efficiently generate mutant genes coding for thermostable enzyme variants from the thermolabile enzyme genes under appropriate selection pressures. This phenomenon provides a new approach to generate thermostable enzymes, termed as thermoadaptation-directed enzyme evolution, thereby expanding the biotechnological potentials of Geobacillus spp. In this review, we have discussed this approach using successful examples and major challenges yet to be addressed.
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Involvement of transcription-coupled repair factor Mfd and DNA helicase UvrD in mutational processes in Pseudomonas putida. DNA Repair (Amst) 2018; 72:18-27. [PMID: 30292721 DOI: 10.1016/j.dnarep.2018.09.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 09/19/2018] [Accepted: 09/22/2018] [Indexed: 11/20/2022]
Abstract
Stalled RNA polymerases (RNAPs) pose an obstacle for the replicating complexes, which could lead to transcription-replication conflicts and result in genetic instability. Stalled RNAPs and DNA lesions blocking RNAP elongation are removed by transcription-coupled repair (TCR), the process which in bacteria is mediated by TCR factor Mfd and helicase UvrD. Although the mechanism of TCR has been extensively studied, its role in mutagenesis is still obscure. In the current study we have investigated the role of Mfd and UvrD in mutational processes in soil bacterium Pseudomonas putida. Our results revealed that UvrD helicase is essential to prevent the emergence of mutations, as the loss of uvrD resulted in elevated mutant frequency both in exponential- and stationary-phase bacterial cultures. UvrD was also found to be necessary to survive DNA damage, but NER or MMR pathways are not completely abolished in UvrD-deficient P. putida. Mfd-deficiency had a moderate impact on surviving DNA damage and did not influence the frequency of mutations occurred in exponentially growing bacteria. However, the absence of Mfd caused approximately a two-fold decline in stationary-phase mutant frequency compared to the P. putida wild-type strain and suppressed the elevated mutant frequency observed in the ΔuvrD strain. Remarkably, the Mfd-deficient strain also formed less UV-induced mutants. These results suggest that in P. putida the Mfd-mediated TCR could be associated with UV- and stationary-phase mutagenesis.
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Drejer EB, Hakvåg S, Irla M, Brautaset T. Genetic Tools and Techniques for Recombinant Expression in Thermophilic Bacillaceae. Microorganisms 2018; 6:microorganisms6020042. [PMID: 29748477 PMCID: PMC6027425 DOI: 10.3390/microorganisms6020042] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 05/02/2018] [Accepted: 05/03/2018] [Indexed: 01/17/2023] Open
Abstract
Although Escherichia coli and Bacillus subtilis are the most prominent bacterial hosts for recombinant protein production by far, additional species are being explored as alternatives for production of difficult-to-express proteins. In particular, for thermostable proteins, there is a need for hosts able to properly synthesize, fold, and excrete these in high yields, and thermophilic Bacillaceae represent one potentially interesting group of microorganisms for such purposes. A number of thermophilic Bacillaceae including B.methanolicus, B.coagulans, B.smithii, B.licheniformis, Geobacillus thermoglucosidasius, G. kaustophilus, and G. stearothermophilus are investigated concerning physiology, genomics, genetic tools, and technologies, altogether paving the way for their utilization as hosts for recombinant production of thermostable and other difficult-to-express proteins. Moreover, recent successful deployments of CRISPR/Cas9 in several of these species have accelerated the progress in their metabolic engineering, which should increase their attractiveness for future industrial-scale production of proteins. This review describes the biology of thermophilic Bacillaceae and in particular focuses on genetic tools and methods enabling use of these organisms as hosts for recombinant protein production.
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Affiliation(s)
- Eivind B Drejer
- Department of Biotechnology and Food Science, NTNU: Norwegian University of Science and Technology, 7491 Trondheim, Norway.
| | - Sigrid Hakvåg
- Department of Biotechnology and Food Science, NTNU: Norwegian University of Science and Technology, 7491 Trondheim, Norway.
| | - Marta Irla
- Department of Biotechnology and Food Science, NTNU: Norwegian University of Science and Technology, 7491 Trondheim, Norway.
| | - Trygve Brautaset
- Department of Biotechnology and Food Science, NTNU: Norwegian University of Science and Technology, 7491 Trondheim, Norway.
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