1
|
Lappöhn CA, Oestreich AM, Stei R, Weber LG, Maerz L, Wolff MW. Process intensification for the production of a C-tagged antimicrobial peptide in Escherichia coli - First steps toward a platform technology. J Biosci Bioeng 2023; 136:358-365. [PMID: 37770299 DOI: 10.1016/j.jbiosc.2023.09.003] [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: 05/05/2023] [Revised: 09/06/2023] [Accepted: 09/06/2023] [Indexed: 09/30/2023]
Abstract
The production of antimicrobial peptides/proteins (AMPs) in sufficient quantities for clinical evaluation is challenging because complex peptides are unsuitable for chemical synthesis, natural sources have low yields, and heterologous systems often have low expression levels or require product-specific process adaptations. Here we describe the production of a complex AMP, the insect metalloproteinase inhibitor (IMPI), by adding a C-terminal C-tag to increase the yield compared to the unmodified peptide. We used a design of experiments approach for process intensification in Escherichia coli Rosetta-gami 2(DE3)pLysS cells and achieved a yield of 260 mg L-1, which is up to 30-fold higher than previously reported. The C-tag also enhanced product purity but had no effect on IMPI activity, making tag removal unnecessary and therefore simplifying process analytics and downstream processing. We have confirmed that the C-tag is compatible with the peptide and could form the basis of a platform technology for the expression, purification and detection of diverse AMPs produced in E. coli.
Collapse
Affiliation(s)
- Carolin A Lappöhn
- Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen (THM), Wiesenstr. 14, 35390 Giessen, Germany
| | - Arne M Oestreich
- Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen (THM), Wiesenstr. 14, 35390 Giessen, Germany
| | - Robin Stei
- Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen (THM), Wiesenstr. 14, 35390 Giessen, Germany
| | - Linus G Weber
- Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen (THM), Wiesenstr. 14, 35390 Giessen, Germany
| | - Lea Maerz
- Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen (THM), Wiesenstr. 14, 35390 Giessen, Germany
| | - Michael W Wolff
- Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen (THM), Wiesenstr. 14, 35390 Giessen, Germany; Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Ohlebergsweg 12, 35392 Giessen, Germany.
| |
Collapse
|
2
|
Khodak YA, Shaifutdinov RR, Khasanov DS, Orlova NA, Vorobiev II. Location and Orientation of the Genetic Toxin-Antitoxin Element hok/sok in the Plasmid Affect Expression of Pharmaceutically Significant Proteins in Bacterial Cells. BIOCHEMISTRY. BIOKHIMIIA 2023; 88:1326-1337. [PMID: 37770399 DOI: 10.1134/s0006297923090122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 08/15/2023] [Accepted: 08/15/2023] [Indexed: 09/30/2023]
Abstract
Genetic toxin-antitoxin element hok/sok from the natural Escherichia coli R1 plasmid ensures segregational stability of plasmids. Bacterial cells that have lost all copies of the plasmid encoding the short-lived antitoxin are killed by the stable toxin. When introduced into bacterial expression vectors, the hok/sok element can increase the productive time of recombinant protein biosynthesis by slowing down accumulation of non-producing cells lacking the expression plasmid. In this work, we studied the effects of position and orientation of the hok/sok element in the standard pET28a plasmid with the inducible T7lac promoter and kanamycin resistance gene. It was found that the hok/sok element retained its functional activity regardless of its location and orientation in the plasmid. Bacterial cells retained the hok/sok-containing plasmids after four days of cultivation without antibiotics, while the control plasmid without this element was lost. Using three target proteins - E. coli type II asparaginase (ASN), human growth hormone (HGH), and SARS-CoV-2 virus nucleoprotein (NP) - it was demonstrated that the maximum productivity of bacteria for the cytoplasmic proteins (HGH and NP) was observed only when the hok/sok element was placed upstream of the target gene promoter. In the case of periplasmic protein localization (ASN), the productivity of bacteria during cultivation with the antibiotic decreased for all variants of the hok/sok location. When the bacteria were cultivated without the antibiotic, the productivity was better preserved when the hok/sok element was located upstream of the target gene promoter. The use of the pEHU vector with the upstream location of the hok/sok element allowed to more than double the yield of HGH (produced as inclusion bodies) in the absence of antibiotic and to maintain ASN biosynthesis at the level of at least 10 mg/liter for four days during cultivation without antibiotics. The developed segregation-stabilized plasmid vectors can be used to obtain various recombinant proteins in E. coli cells without the use of antibiotics.
Collapse
Affiliation(s)
- Yulia A Khodak
- Institute of Bioengineering, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, 117312, Russia
| | - Rolan R Shaifutdinov
- Institute of Bioengineering, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, 117312, Russia
| | - Danila S Khasanov
- Institute of Bioengineering, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, 117312, Russia
| | - Nadezhda A Orlova
- Institute of Bioengineering, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, 117312, Russia
| | - Ivan I Vorobiev
- Institute of Bioengineering, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, 117312, Russia.
| |
Collapse
|
3
|
Li J, Huang W, He H, Shi S, Sun X, Xiao J. Biocompatible and bioactive hydrogels of recombinant fusion elastin with low transition temperature for improved healing of UV-irradiated skin. J Mater Chem B 2023. [PMID: 37401183 DOI: 10.1039/d3tb00564j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/05/2023]
Abstract
Prolonged exposure to UV radiation can cause severe photodamage to the skin, leading to abnormal fragmentation of elastin fibers. As one of the main protein components of the dermal extracellular matrix, elastin plays a critical role in the mechanical behavior and physiological function of the skin. Animal-derived elastin has attracted extensive attention in tissue engineering, however it suffers from severe drawbacks such as a risk of virus transmission, ready degradation, and challenging quality control. Herein, we have for the first time developed a novel recombinant fusion elastin (RFE) and its cross-linked hydrogel for improved healing efficacy for UV-irradiated skin. RFE showed temperature-sensitive aggregation behavior similar to natural elastin. Compared with recombinant elastin without the fusion V-foldon domain, RFE showed a much more ordered secondary structure and lower transition temperature. Furthermore, Native-PAGE results indicated that the addition of the V-foldon domain triggered the formation of remarkable oligomers in RFE, which may result in a more ordered conformation. Tetrakis Hydroxymethyl Phosphonium Chloride (THPC) cross-linking of RFE led to the production of a fibrous hydrogel with uniform three-dimensional porous nanostructures and excellent mechanical strength. The RFE hydrogel showed superior cellular activity, significantly promoting the survival and proliferation of human foreskin fibroblast-1 (HFF-1). Studies of mice models of UV-irradiated skin demonstrated that the RFE hydrogel pronouncedly accelerated their healing process by inhibiting epidermal hyperplasia as well as boosting the regeneration of collagen and elastin fibers. The highly biocompatible and bioactive recombinant fusion elastin and its cross-linked hydrogel provide a potent treatment for photodamaged skin, which may have promising applications in dermatology and tissue engineering.
Collapse
Affiliation(s)
- Jianan Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
- Gansu Engineering Research Center of Medical Collagen, China
| | - Wenjie Huang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
- Gansu Engineering Research Center of Medical Collagen, China
| | - Huixia He
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
- Gansu Engineering Research Center of Medical Collagen, China
| | - Shuangni Shi
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
- Gansu Engineering Research Center of Medical Collagen, China
| | - Xiuxia Sun
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, 730000, China.
- Gansu Engineering Research Center of Medical Collagen, China
| | - Jianxi Xiao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
- Gansu Engineering Research Center of Medical Collagen, China
| |
Collapse
|
4
|
Xiao Z, Connor AJ, Worland AM, Tang YJ, Zha RH, Koffas M. Silk fibroin production in Escherichia coli is limited by a positive feedback loop between metabolic burden and toxicity stress. Metab Eng 2023; 77:231-241. [PMID: 37024071 DOI: 10.1016/j.ymben.2023.03.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 03/11/2023] [Accepted: 03/25/2023] [Indexed: 04/08/2023]
Abstract
To investigate the metabolic elasticity and production bottlenecks for recombinant silk proteins in Escherichia coli, we performed a comprehensive characterization of one elastin-like peptide strain (ELP) and two silk protein strains (A5 4mer, A5 16mer). Our approach included 13C metabolic flux analysis, genome-scale modeling, transcription analysis, and 13C-assisted media optimization experiments. Three engineered strains maintained their central flux network during growth, while measurable metabolic flux redistributions (such as the Entner-Doudoroff pathway) were detected. Under metabolic burdens, the reduced TCA fluxes forced the engineered strain to rely more on substrate-level phosphorylation for ATP production, which increased acetate overflow. Acetate (as low as 10 mM) in the media was highly toxic to silk-producing strains, which reduced 4mer production by 43% and 16mer by 84%, respectively. Due to the high toxicity of large-size silk proteins, 16mer's productivity was limited, particularly in the minimal medium. Therefore, metabolic burden, overflow acetate, and toxicity of silk proteins may form a vicious positive feedback loop that fractures the metabolic network. Three solutions could be applied: 1) addition of building block supplements (i.e., eight key amino acids: His, Ile, Phe, Pro, Tyr, Lys, Met, Glu) to reduce metabolic burden; 2) disengagement of growth and production; and 3) use of non-glucose based substrate to reduce acetate overflow. Other reported strategies were also discussed in light of decoupling this positive feedback loop.
Collapse
Affiliation(s)
- Zhengyang Xiao
- Department of Chemical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Alexander J Connor
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY, 12180, USA
| | - Alyssa M Worland
- Department of Chemical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Yinjie J Tang
- Department of Chemical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA.
| | - R Helen Zha
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY, 12180, USA.
| | - Mattheos Koffas
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY, 12180, USA.
| |
Collapse
|
5
|
Liu X, Zhao L, Wu B, Chen F. Improving solubility of poorly water-soluble drugs by protein-based strategy: A review. Int J Pharm 2023; 634:122704. [PMID: 36758883 DOI: 10.1016/j.ijpharm.2023.122704] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/30/2023] [Accepted: 02/04/2023] [Indexed: 02/10/2023]
Abstract
Poorly water-soluble drugs are frequently encountered and present a most challengeable difficulty in pharmaceutical development. Poor solubility of drugs can lead to suboptimal bioavailability and therapeutic efficiency. Increasing efforts have been contributed to improve the solubility of poorly water-soluble drugs for better pharmacokinetics and pharmacodynamics. Among various solubility enhancement technologies, protein-based strategy to address poorly water-soluble drugs issues has special interests for natural advantages including versatile interactions between proteins and hydrophobic drugs, biocompatibility, biodegradation, and metabolization of proteins. The protein-drug formulations could be formed by covalent conjugations or noncovalent interactions to facilitate solubility of poorly water-soluble drugs. This review is to summarize the advances using proteins including plant proteins, mammalian proteins, and recombinant proteins, to enhance water solubility of poorly water-soluble drugs.
Collapse
Affiliation(s)
- Xiaowen Liu
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China; Shanghai Engineering Research Center of Industrial Asymmetric Catalysis of Chiral Drugs, 220 Handan Road, Shanghai 200433, China.
| | - Limin Zhao
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China; Shanghai Engineering Research Center of Industrial Asymmetric Catalysis of Chiral Drugs, 220 Handan Road, Shanghai 200433, China
| | - Baojian Wu
- Institute of Molecular Rhythm and Metabolism, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Fener Chen
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China; Shanghai Engineering Research Center of Industrial Asymmetric Catalysis of Chiral Drugs, 220 Handan Road, Shanghai 200433, China.
| |
Collapse
|
6
|
Shariati FS, Keramati M, Cohan RA. Indirect optimization of staphylokinase expression level in dicistronic auto-inducible system. AMB Express 2022; 12:124. [PMID: 36138332 PMCID: PMC9500143 DOI: 10.1186/s13568-022-01464-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 09/10/2022] [Indexed: 11/10/2022] Open
Abstract
Design of experiment (DOE) is a statistical approach for designing, performing, and interpreting a large set of data with the minimum number of tests. In our previous study, we developed a novel Hsp27 SILEX system for production of recombinant proteins. In the present study, we optimized indirectly the most effective factors including inoculation load, self-induction temperature, and culture media on autoinduction of staphylokinase (SAK) expression using RSM methodology and fluorometry. The expression level of SAK was assayed at different runs after 6 h incubation at 90 rpm. The results indicated all parameters significantly affect the SAK expression level (p < 0.05). The optimum expression condition was obtained with an inoculation load of 0.05, a temperature of 25 °C, and TB culture medium. The analysis of variance with a R2 value of 0.91 showed that a quadratic model well described this prediction (p < 0.05). Applying the optimized condition led to an approximately fourfold increase in the SAK expression level (from 1.3 to 5.2 µg/ml). Moreover, the recombinant protein was purified using immobilized metal affinity chromatography and the activity was also confirmed by semi-quantitative caseinolytic method.
Collapse
Affiliation(s)
- Fatemeh Sadat Shariati
- Department of Nanobiotechnology, New Technologies Research Group, Pasteur Institute of Iran, Tehran, Iran
| | - Malihe Keramati
- Department of Nanobiotechnology, New Technologies Research Group, Pasteur Institute of Iran, Tehran, Iran.
| | - Reza Ahangari Cohan
- Department of Nanobiotechnology, New Technologies Research Group, Pasteur Institute of Iran, Tehran, Iran.
| |
Collapse
|
7
|
A bench-scale rotating bioreactor with improved oxygen transfer and cell growth. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
8
|
Al-Janabi SS, Shawky H, El-Waseif AA, Farrag AA, Abdelghany TM, El-Ghwas DE. Stable, efficient, and cost-effective system for the biosynthesis of recombinant bacterial cellulose in Escherichia coli DH5α platform. J Genet Eng Biotechnol 2022; 20:90. [PMID: 35737166 PMCID: PMC9226222 DOI: 10.1186/s43141-022-00384-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 06/14/2022] [Indexed: 11/23/2022]
Abstract
Background Owing to its remarkable mechanical properties that surpass the plant-based cellulose, bacterial cellulose production has been targeted for commercialization during the last few years. However, the large-scale production of cellulose is generally limited by the slow growth of producing strains and low productivity which ultimately makes the commercial production of cellulose using the conventional strains non cost-effective. In this study, we developed a novel plasmid-based expression system for the biosynthesis of cellulose in E.coli DH5α and assessed the cellulose productivity relative to the typically used E.coli BL21 (DE) expression strain. Results No production was detected in BL21 (DE3) cultures upon expression induction; however, cellulose was detected in E.coli DH5α as early as 1 h post-induction. The total yield in induced DH5α cultures was estimated as 200 ± 5.42 mg/L (dry weight) after 18 h induction, which surpassed the yield reported in previous studies and even the wild-type Gluconacetobacterxylinum BRC5 under the same conditions. As confirmed with electron microscope micrograph, E.coli DH5α produced dense cellulose fibers with ~ 10 μm diameter and 1000–3000 μm length, which were remarkably larger and more crystalline than that typically produced by G.hansenii. Conclusions This is the first report on the successful cellulose production in E.coli DH5α which is typically used for plasmid multiplication rather than protein expression, without the need to co-express cmcax and ccpAx regulator genes present in the wild-type genome upstream the bcs-operon, and reportedly essential for the biosynthesis.
Collapse
Affiliation(s)
- Saif S Al-Janabi
- Botany and Microbiology Department, Faculty of Science (Boys), Al-Azhar University, Cairo, Egypt.,Department of Medical Laboratory Techniques, Al-Maarif University College, Al-anbbar, Iraq
| | - Heba Shawky
- Therapeutic Chemistry Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, Dokki 12622, Cairo, Egypt.
| | - Amr A El-Waseif
- Botany and Microbiology Department, Faculty of Science (Boys), Al-Azhar University, Cairo, Egypt
| | - Ayman A Farrag
- Botany and Microbiology Department, Faculty of Science (Boys), Al-Azhar University, Cairo, Egypt
| | - Tarek M Abdelghany
- Botany and Microbiology Department, Faculty of Science (Boys), Al-Azhar University, Cairo, Egypt
| | - Dina E El-Ghwas
- Chemistry of Natural and Microbial Products Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, Dokki, Cairo, 12622, Egypt
| |
Collapse
|
9
|
Ayoub Meigouni M, Abouie Mehrizi A, Fazaeli A, Zakeri S, Djadid ND. Optimization of the heterologous expression and purification of Plasmodium falciparum generative cell specific 1 in Escherichia coli. Protein Expr Purif 2022; 198:106126. [PMID: 35661702 DOI: 10.1016/j.pep.2022.106126] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 05/17/2022] [Accepted: 05/29/2022] [Indexed: 10/18/2022]
Abstract
Generative cell specific 1 (GCS1) or Hapless2 (Hap2) is a main transmission-blocking vaccine (TBV) candidate against malaria. Experience has shown that this protein is difficult to express in heterologous hosts. In a study, Plasmodium falciparum GCS1 (PfGCS1) could be expressed in fusion with Glutathione S Transferase (GST). Since the large fusions could influence the immunogenicity of the recombinant antigens, in the current study we tried to express PfGCS1 protein without large fusion tags with an appropriate yield and purity in E. coli. To this end, pfgcs1 gene was codon-optimized and cloned in pET23a plasmid. The expression was evaluated in different E. coli hosts [E. coli BL21(DE3), E. coli BL21(DE3) pLysS, E. coli Rosetta(DE3), and E. coli Rosettagami(DE3)] and media cultures. In addition, the effect of post-induction times, inducer concentration, temperature, and supplementation of glucose and ethanol to culture media were evaluated. The obtained results revealed that rPfGCS1 protein was expressed in all examined E. coli hosts and media cultures with different yields, with the best yield in E. coli BL21(DE3), and E. coli Rosetta(DE3) hosts in TB medium, 16 h post-induction. The expression of rPfGCS1 was confirmed by western blotting using anti-His antibodies. Expression in low temperature at 20 °C and addition of glucose and ethanol to TB media could improve the expression of rPfGCS1. We could express and purify rPfGCS1 without a large fusion protein with an appropriate yield and purity in E. coli Rosetta(DE3). We will evaluate this antigen as TBV candidate against P. falciparum transmission in the future.
Collapse
Affiliation(s)
- Masoumeh Ayoub Meigouni
- , Malaria and Vector Research Group, Biotechnology Research Group, Pasteur Institute of Iran, Tehran, Iran; , Department of Parasitology and Mycology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Akram Abouie Mehrizi
- , Malaria and Vector Research Group, Biotechnology Research Group, Pasteur Institute of Iran, Tehran, Iran.
| | - Asghar Fazaeli
- , Department of Parasitology and Mycology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Sedigheh Zakeri
- , Malaria and Vector Research Group, Biotechnology Research Group, Pasteur Institute of Iran, Tehran, Iran
| | - Navid Dinparast Djadid
- , Malaria and Vector Research Group, Biotechnology Research Group, Pasteur Institute of Iran, Tehran, Iran
| |
Collapse
|
10
|
Qi H, Yu L, Li Y, Cai M, He J, Liu J, Hao L, Xu H, Qiao M. Developing Multi-Copy Chromosomal Integration Strategies for Heterologous Biosynthesis of Caffeic Acid in Saccharomyces cerevisiae. Front Microbiol 2022; 13:851706. [PMID: 35300487 PMCID: PMC8923693 DOI: 10.3389/fmicb.2022.851706] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 02/09/2022] [Indexed: 11/13/2022] Open
Abstract
Caffeic acid, a plant-sourced phenolic compound, has a variety of biological activities, such as antioxidant and antimicrobial properties. The caffeic acid biosynthetic pathway was initially constructed in S. cerevisiae, using codon-optimized TAL (coTAL, encoding tyrosine ammonia lyase) from Rhodobacter capsulatus, coC3H (encoding p-coumaric acid 3-hydroxylase) and coCPR1 (encoding cytochrome P450 reductase 1) from Arabidopsis thaliana in 2 μ multi-copy plasmids to produce caffeic acid from glucose. Then, integrated expression of coTAL via delta integration with the POT1 gene (encoding triose phosphate isomerase) as selection marker and episomal expression of coC3H, coCPR1 using the episomal plasmid pLC-c3 were combined, and caffeic acid production was proved to be improved. Next, the delta and rDNA multi-copy integration methods were applied to integrate the genes coC3H and coCPR1 into the chromosome of high p-coumaric acid yielding strain QT3-20. The strain D9 constructed via delta integration outperformed the other strains, leading to 50-fold increased caffeic acid production in optimized rich media compared with the initial construct. The intercomparison between three alternative multi-copy strategies for de novo synthesis of caffeic acid in S. cerevisiae suggested that delta-integration was effective in improving caffeic acid productivity, providing a promising strategy for the production of valuable bio-based chemicals in recombinant S. cerevisiae.
Collapse
Affiliation(s)
- Hang Qi
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Long Yu
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Yuanzi Li
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China.,School of Light Industry, Beijing Technology and Business University, Beijing, China
| | - Miao Cai
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Jiaze He
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Jiayu Liu
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Luyao Hao
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Haijin Xu
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Mingqiang Qiao
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| |
Collapse
|
11
|
Chambre L, Martín-Moldes Z, Parker RN, Kaplan DL. Bioengineered elastin- and silk-biomaterials for drug and gene delivery. Adv Drug Deliv Rev 2020; 160:186-198. [PMID: 33080258 PMCID: PMC7736173 DOI: 10.1016/j.addr.2020.10.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 09/30/2020] [Accepted: 10/16/2020] [Indexed: 12/11/2022]
Abstract
Advances in medical science have led to diverse new therapeutic modalities, as well as enhanced understanding of the progression of various disease states. These findings facilitate the design and development of more customized and exquisite drug delivery systems that aim to improve therapeutic indices of drugs to treat a variety of conditions. Synthetic polymer-based drug carriers have often been the focus of such research. However, these structures suffer from challenges with heterogeneity of the starting material, limited chemical features, complex functionalization methods, and in some cases a lack of biocompatibility. Consequently, protein-based polymers have garnered much attention in recent years due to their monodisperse features, ease of production and functionalization, and biocompatibility. Genetic engineering techniques enable the advancement of protein-based drug delivery systems with finely tuned physicochemical properties, and thus an expanded level of customization unavailable with synthetic polymers. Of these genetically engineered proteins, elastin-like proteins (ELP), silk-like proteins (SLP), and silk-elastin-like proteins (SELP) provide a unique set of alternatives for designing drug delivery systems due to their inherent chemical and physical properties and ease of engineering afforded by recombinant DNA technologies. In this review we examine the advantages of genetically engineered drug delivery systems with emphasis on ELP and SLP constructions. Methods for fabrication and relevant biomedical applications will also be discussed.
Collapse
Affiliation(s)
- Laura Chambre
- Department of Biomedical Engineering, Tufts University, 4 Colby St, Medford, MA 02155, USA
| | - Zaira Martín-Moldes
- Department of Biomedical Engineering, Tufts University, 4 Colby St, Medford, MA 02155, USA
| | - Rachael N Parker
- Department of Biomedical Engineering, Tufts University, 4 Colby St, Medford, MA 02155, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby St, Medford, MA 02155, USA.
| |
Collapse
|
12
|
Georgilis E, Abdelghani M, Pille J, Aydinlioglu E, van Hest JC, Lecommandoux S, Garanger E. Nanoparticles based on natural, engineered or synthetic proteins and polypeptides for drug delivery applications. Int J Pharm 2020; 586:119537. [DOI: 10.1016/j.ijpharm.2020.119537] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/03/2020] [Accepted: 06/06/2020] [Indexed: 12/12/2022]
|
13
|
Use of plasmids for expression of proteins from the genus Leishmania in Escherichia coli: current state and perspectives. Appl Microbiol Biotechnol 2020; 104:4273-4280. [PMID: 32215706 DOI: 10.1007/s00253-020-10548-5] [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] [Received: 02/13/2020] [Revised: 03/05/2020] [Accepted: 03/15/2020] [Indexed: 10/24/2022]
Abstract
Leishmaniosis is caused by the protozoa of the genus Leishmania with a wide spectrum of clinical and epidemiological manifestations which are characterized into four clinical groups: cutaneous, mucocutaneous, diffuse cutaneous, and visceral. American visceral leishmaniosis (AVL) or visceral leishmaniosis (VL) has been known as the most severe form of the disease. However, despite the growing number of people exposed to the infection risk and the great effort done by the scientific community worldwide to significantly increase the knowledge about these diseases, there is no vaccine capable of preventing VL in humans. In this short review, we present some of the plasmids used for the expression of recombinant protein by Escherichia coli strains used mainly for the second generation of vaccines for leishmaniosis. It can be emphasized that currently, these vectors and hosts play an important role in developing vaccine strategies against the disease. Indeed, use of the E. coli BL21 (DE) strain is remarkable mainly due to its characteristics for being a stable protein producer as well as the use of histidine tags for antigen purification. KEY POINTS: • Plasmid vectors and E. coli will continue being important for studies about leishmaniosis. • Protein purification exploiting histidine tags is a key technique.
Collapse
|
14
|
Laipnik R, Bissi V, Sun CY, Falini G, Gilbert PUPA, Mass T. Coral acid rich protein selects vaterite polymorph in vitro. J Struct Biol 2019; 209:107431. [PMID: 31811894 PMCID: PMC7058422 DOI: 10.1016/j.jsb.2019.107431] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 11/27/2019] [Accepted: 12/01/2019] [Indexed: 12/14/2022]
Abstract
Corals and other biomineralizing organisms use proteins and other molecules to form different crystalline polymorphs and biomineral structures. In corals, it’s been suggested that proteins such as Coral Acid Rich Proteins (CARPs) play a major role in the polymorph selection of their calcium carbonate (CaCO3) aragonite exoskeleton. To date, four CARPs (1–4) have been characterized: each with a different amino acid composition and different temporal and spatial expression patterns during coral developmental stages. Interestingly, CARP3 is able to alter crystallization pathways in vitro, yet its function in this process remains enigmatic. To better understand the CARP3 function, we performed two independent in vitro CaCO3 polymorph selection experiments using purified recombinant CARP3 at different concentrations and at low or zero Mg2+ concentration. Our results show that, in the absence of Mg2+, CARP3 selects for the vaterite polymorph and inhibits calcite. However, in the presence of a low concentration of Mg2+ and CARP3 both Mg-calcite and vaterite are formed, with the relative amount of Mg-calcite increasing with CARP3 concentration. In all conditions, CARP3 did not select for the aragonite polymorph, which is the polymorph associated to CARP3 in vivo, even in the presence of Mg2+ (Mg:Ca molar ratio equal to 1). These results further emphasize the importance of Mg:Ca molar ratios similar to that in seawater (Mg:Ca equal to 5) and the activity of the biological system in a aragonite polymorph selection in coral skeleton formation.
Collapse
Affiliation(s)
- Ra'anan Laipnik
- Marine Biology Department, Leon H. Charney School of Marine Sciences, University of Haifa, Israel
| | - Veronica Bissi
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Italy
| | - Chang-Yu Sun
- Department of Physics, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Giuseppe Falini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Italy
| | - Pupa U P A Gilbert
- Department of Physics, University of Wisconsin-Madison, Madison, WI 53706, USA; Departments of Chemistry, Materials Science and Engineering, and Geoscience, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Tali Mass
- Marine Biology Department, Leon H. Charney School of Marine Sciences, University of Haifa, Israel.
| |
Collapse
|
15
|
Cai M, Huang Y, Craigie R, Clore GM. A simple protocol for expression of isotope-labeled proteins in Escherichia coli grown in shaker flasks at high cell density. JOURNAL OF BIOMOLECULAR NMR 2019; 73:743-748. [PMID: 31677040 DOI: 10.1007/s10858-019-00285-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 10/09/2019] [Indexed: 06/10/2023]
Abstract
Protein expression in E. coli grown in shaker flasks is a routine and pivotal tool in many research laboratories. To maximize protein yields, cells are normally induced in the middle of the linear growth phase, typically at an OD600 of ≤ 1 for cells grown in Luria-Bertani (LB) medium at 37 °C. We recently showed that the E. coli linear growth phase can be extended to higher cell density when cells are cultured under less than optimal conditions such as in minimal medium and/or at lower temperatures. Maximizing the yield of protein per unit volume of culture is important for reducing the costs, especially when isotopically labeling is required. Here, we present a modified minimal medium and a simple protocol that can increase the protein yield up to fourfold in a pH-stabilized LB medium and up to sevenfold in a modified M9+ medium (M9++). When M9++ medium coupled with the high density (OD600 ~ 6) cell growth protocol are used to express uniformly 15N- or 15N/13C-labeled proteins, the amount of 15NH4Cl and 13C6-glucose for a given cell mass is reduced by 50% and ~ 65%, respectively, relative to the traditional low density (OD600 ~ 1) cell growth protocol with M9 medium; the inclusion of 0.1% LB in the minimal medium permits a reduction in the concentration of both the trace element solution and MgCl2, which can cause precipitation. Mass data indicate that inclusion of 0.1% LB does not significantly affect the isotope enrichment level.
Collapse
Affiliation(s)
- Mengli Cai
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892-0520, USA
| | - Ying Huang
- Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892-0520, USA
| | - Robert Craigie
- Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892-0520, USA.
| | - G Marius Clore
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892-0520, USA.
| |
Collapse
|
16
|
Joachim M, Maguire N, Schäfer J, Gerlach D, Czermak P. Process Intensification for an Insect Antimicrobial Peptide Elastin-Like Polypeptide Fusion Produced in Redox-Engineered Escherichia coli. Front Bioeng Biotechnol 2019; 7:150. [PMID: 31316976 PMCID: PMC6610315 DOI: 10.3389/fbioe.2019.00150] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 06/06/2019] [Indexed: 12/31/2022] Open
Abstract
Peptides and proteins containing disulfide bonds can be produced in Escherichia coli by targeting the oxidizing periplasm, co-expressing isomerases or chaperons, refolding from inclusion bodies, or by using redox-engineered E. coli strains. Thus far, protein expression in glutathione reductase and thioredoxin reductase deficient (Δgor ΔtrxB) E. coli strains has required a complex medium. However, a chemically defined medium suitable for large-scale production would be preferable for industrial applications. Recently, we developed a minimal medium supplemented with iron (M9i) for high-density cultivation using E. coli Rosetta gami B(DE3)pLysS cells. Here we show that M9i is suitable for the production of insect metalloproteinase inhibitor (IMPI), which contains five disulfide bonds, in the same E. coli strain. We demonstrated the scalability of the new fed-batch process by combining the scale-up criteria of constant dissolved oxygen (DO) and matching volumetric power inputs (P/V) at the borders of the stirrer cascade. Process intensification was achieved by investigating production feed rates and different induction times. We improved product titers by ~200-fold compared to the standard process in complex medium while maintaining the activity of the IMPI protein. Our results show for the first time that it is possible to produce active proteins containing multiple disulfide bonds in a Δgor ΔtrxB E. coli strain using M9i medium. The success of scale-up and process intensification shows that the industrial production of complex recombinant proteins in such strains using chemically defined M9i minimal medium is feasible.
Collapse
Affiliation(s)
- Mathias Joachim
- Department of Life Science Engineering, Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, Giessen, Germany.,Faculty of Biology and Chemistry, Justus Liebig University, Giessen, Germany
| | - Nicolas Maguire
- Department of Bioresources of Fraunhofer, Institute for Molecular Biology and Applied Ecology IME, Giessen, Germany
| | - Johannes Schäfer
- Department of Life Science Engineering, Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, Giessen, Germany
| | - Doreen Gerlach
- Department of Bioresources of Fraunhofer, Institute for Molecular Biology and Applied Ecology IME, Giessen, Germany
| | - Peter Czermak
- Department of Life Science Engineering, Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, Giessen, Germany.,Faculty of Biology and Chemistry, Justus Liebig University, Giessen, Germany.,Department of Bioresources of Fraunhofer, Institute for Molecular Biology and Applied Ecology IME, Giessen, Germany
| |
Collapse
|
17
|
Ribeiro VT, Asevedo EA, de Paiva Vasconcelos LTC, Filho MAO, de Araújo JS, de Macedo GR, de Sousa Júnior FC, Dos Santos ES. Evaluation of induction conditions for plasmid pQE-30 stability and 503 antigen of Leishmania i. chagasi expression in E. coli M15. Appl Microbiol Biotechnol 2019; 103:6495-6504. [PMID: 31218376 DOI: 10.1007/s00253-019-09948-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/23/2019] [Accepted: 05/28/2019] [Indexed: 11/29/2022]
Abstract
The present study aimed to evaluate the influence of induction conditions (IPTG concentration, temperature, and induction time) on the plasmid pQE-30 stability and 503 antigen expression of Leishmania i. chagasi in Escherichia coli M15. Batch cultures were performed at 37 °C and induced by the addition of different IPTG concentrations (0.01 to 1.5 mM). Subsequently, experiments were carried out at different temperatures (27 to 42 °C), evaluating the influence of induction time (0.5 to 6 h after the start of the culture). The results showed that IPTG toxicity caused a metabolic stress in the cells and, consequently, the microorganism growth reduced. The induction with IPTG may also be associated with the plasmid pQE-30 instability, due to metabolic burden imposed by the recombinant protein expression. The optimal conditions for 503 antigen expression of Leishmania i. chagasi in Escherichia coli M15 were an IPTG concentration of 1.0 mM, temperature of 37 °C, and induction time of 2 h. The maximum antigen concentration obtained was 0.119 ± 0.009 g/L, about seven times higher than the lowest concentration. Therefore, the results showed that 503 antigen can be produced in laboratory; however, it requires more studies to minimize the plasmid instability and improve to industrial scale.
Collapse
Affiliation(s)
- Vitor Troccoli Ribeiro
- Chemical Engineering Department, Universidade Federal do Rio Grande do Norte, Av. Sen. Salgado Filho, 3000, Natal, Rio Grande do Norte, 59078-970, Brazil
| | - Estéfani Alves Asevedo
- Chemical Engineering Department, Universidade Federal do Rio Grande do Norte, Av. Sen. Salgado Filho, 3000, Natal, Rio Grande do Norte, 59078-970, Brazil
| | - Luan Tales Costa de Paiva Vasconcelos
- Chemical Engineering Department, Universidade Federal do Rio Grande do Norte, Av. Sen. Salgado Filho, 3000, Natal, Rio Grande do Norte, 59078-970, Brazil
| | - Marcos Antônio Oliveira Filho
- Chemical Engineering Department, Universidade Federal do Rio Grande do Norte, Av. Sen. Salgado Filho, 3000, Natal, Rio Grande do Norte, 59078-970, Brazil
| | - Jaciara Silva de Araújo
- Chemical Engineering Department, Universidade Federal do Rio Grande do Norte, Av. Sen. Salgado Filho, 3000, Natal, Rio Grande do Norte, 59078-970, Brazil
| | - Gorete Ribeiro de Macedo
- Chemical Engineering Department, Universidade Federal do Rio Grande do Norte, Av. Sen. Salgado Filho, 3000, Natal, Rio Grande do Norte, 59078-970, Brazil
| | - Francisco Canindé de Sousa Júnior
- Pharmacy Department, Universidade Federal do Rio Grande do Norte, R. Gen. Gustavo Cordeiro de Faria, Natal, Rio Grande do Norte, 59012-570, Brazil
| | - Everaldo Silvino Dos Santos
- Chemical Engineering Department, Universidade Federal do Rio Grande do Norte, Av. Sen. Salgado Filho, 3000, Natal, Rio Grande do Norte, 59078-970, Brazil.
| |
Collapse
|
18
|
Lopes C, dos Santos NV, Dupont J, Pedrolli DB, Valentini SR, Santos‐Ebinuma V, Pereira JFB. Improving the cost effectiveness of enhanced green fluorescent protein production using recombinantEscherichia coliBL21 (DE3): Decreasing the expression inducer concentration. Biotechnol Appl Biochem 2019; 66:527-536. [DOI: 10.1002/bab.1749] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 04/01/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Camila Lopes
- Department of Bioprocesses and BiotechnologySchool of Pharmaceutical Sciences, São Paulo State University (UNESP) Araraquara Brazil
| | - Nathalia Vieira dos Santos
- Department of Bioprocesses and BiotechnologySchool of Pharmaceutical Sciences, São Paulo State University (UNESP) Araraquara Brazil
| | - Jana Dupont
- Department of Bioprocesses and BiotechnologySchool of Pharmaceutical Sciences, São Paulo State University (UNESP) Araraquara Brazil
- Faculty of Bioscience EngineeringGent University Gent Belgium
| | - Danielle Biscaro Pedrolli
- Department of Bioprocesses and BiotechnologySchool of Pharmaceutical Sciences, São Paulo State University (UNESP) Araraquara Brazil
| | - Sandro Roberto Valentini
- Department of Biological SciencesSchool of Pharmaceutical Sciences, São Paulo State University (UNESP) Araraquara Brazil
| | - Valéria Santos‐Ebinuma
- Department of Bioprocesses and BiotechnologySchool of Pharmaceutical Sciences, São Paulo State University (UNESP) Araraquara Brazil
| | - Jorge Fernando Brandão Pereira
- Department of Bioprocesses and BiotechnologySchool of Pharmaceutical Sciences, São Paulo State University (UNESP) Araraquara Brazil
| |
Collapse
|
19
|
Fazaeli A, Golestani A, Lakzaei M, Rasi Varaei SS, Aminian M. Expression optimization, purification, and functional characterization of cholesterol oxidase from Chromobacterium sp. DS1. PLoS One 2019; 14:e0212217. [PMID: 30759160 PMCID: PMC6373949 DOI: 10.1371/journal.pone.0212217] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 01/29/2019] [Indexed: 12/17/2022] Open
Abstract
Cholesterol oxidase is a bifunctional bacterial flavoenzyme which catalyzes oxidation and isomerization of cholesterol. This valuable enzyme has attracted a great deal of attention because of its wide application in the clinical laboratory, synthesis of steroid derived drugs, food industries, and its potentially insecticidal activity. Therefore, development of an efficient protocol for overproduction of cholesterol oxidase could be valuable and beneficial in this regard. The present study examined the role of various parameters (host strain, culture media, induction time, isopropyl ß-D-1-thiogalactopyranoside concentration, as well as post-induction incubation time and temperature) on over-expression of cholesterol oxidase from Chromobacterium sp. DS1. Applying the optimized protocol, the yield of recombinant cholesterol oxidase significantly increased from 92 U/L to 2115 U/L. Under the optimized conditions, the enzyme was produced on a large-scale, and overexpressed cholesterol oxidase was purified from cell lysate by column nickel affinity chromatography. Km and Vmax values of the purified enzyme for cholesterol were estimated using Lineweaver-Burk plot. Further, the optimum pH and optimum temperature for the enzyme activity were determined. This study reports a straightforward protocol for cholesterol oxidase production which can be performed in any laboratory.
Collapse
Affiliation(s)
- Aliakbar Fazaeli
- Department of Clinical Biochemistry, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Abolfazl Golestani
- Department of Biochemistry, School of Medicine, Tehran University of Medical Sciences, Ardabil, Iran
| | - Mostafa Lakzaei
- Department of Biochemistry, School of Medicine, Tehran University of Medical Sciences, Ardabil, Iran
| | - Samaneh Sadat Rasi Varaei
- Department of Biochemistry, School of Medicine, Tehran University of Medical Sciences, Ardabil, Iran
| | - Mahdi Aminian
- Department of Biochemistry, School of Medicine, Tehran University of Medical Sciences, Ardabil, Iran
- Recombinant Vaccine Research Center, Tehran University of Medical Sciences, Tehran, Iran
- * E-mail:
| |
Collapse
|
20
|
Hemmerich J, Moch M, Jurischka S, Wiechert W, Freudl R, Oldiges M. Combinatorial impact of Sec signal peptides fromBacillus subtilisand bioprocess conditions on heterologous cutinase secretion byCorynebacterium glutamicum. Biotechnol Bioeng 2018; 116:644-655. [DOI: 10.1002/bit.26873] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 09/11/2018] [Accepted: 10/26/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Johannes Hemmerich
- Forschungszentrum JülichInstitute of Bio‐ and Geosciences—Biotechnology (IBG‐1)Jülich Germany
- Bioeconomy Science Center (BioSC)c/o Forschungszentrum JülichJülich Germany
| | - Matthias Moch
- Forschungszentrum JülichInstitute of Bio‐ and Geosciences—Biotechnology (IBG‐1)Jülich Germany
| | - Sarah Jurischka
- Forschungszentrum JülichInstitute of Bio‐ and Geosciences—Biotechnology (IBG‐1)Jülich Germany
- Bioeconomy Science Center (BioSC)c/o Forschungszentrum JülichJülich Germany
| | - Wolfgang Wiechert
- Forschungszentrum JülichInstitute of Bio‐ and Geosciences—Biotechnology (IBG‐1)Jülich Germany
- Bioeconomy Science Center (BioSC)c/o Forschungszentrum JülichJülich Germany
- Computational Systems Biotechnology (AVT.CSB)RWTH Aachen UniversityAachen Germany
| | - Roland Freudl
- Forschungszentrum JülichInstitute of Bio‐ and Geosciences—Biotechnology (IBG‐1)Jülich Germany
- Bioeconomy Science Center (BioSC)c/o Forschungszentrum JülichJülich Germany
| | - Marco Oldiges
- Forschungszentrum JülichInstitute of Bio‐ and Geosciences—Biotechnology (IBG‐1)Jülich Germany
- Bioeconomy Science Center (BioSC)c/o Forschungszentrum JülichJülich Germany
- Institute of BiotechnologyRWTH Aachen UniversityAachen Germany
| |
Collapse
|
21
|
Fazaeli A, Golestani A, Lakzaei M, Rasi Varaei SS, Aminian M. Expression optimization of recombinant cholesterol oxidase in Escherichia coli and its purification and characterization. AMB Express 2018; 8:183. [PMID: 30421362 PMCID: PMC6232189 DOI: 10.1186/s13568-018-0711-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 10/29/2018] [Indexed: 12/22/2022] Open
Abstract
Cholesterol oxidase is a bacterial flavoenzyme which catalyzes oxidation and isomerization of cholesterol. This enzyme has a great commercial value because of its wide applications in cholesterol analysis of clinical samples, synthesis of steroid-derived drugs, food industries, and potentially insecticidal activity. Accordingly, development of an efficient protocol for overexpression of cholesterol oxidase can be very valuable and beneficial. In this study, expression optimization of cholesterol oxidase from Streptomyces sp. SA-COO was investigated in Escherichia coli host strains. Various parameters that may influence the yield of a recombinant enzyme were evaluated individually. The optimal host strain, culture media, induction time, Isopropyl ß-d-1-thiogalactopyranoside concentration, as well as post-induction incubation time and temperature were determined in a shaking flask mode. Applying the optimized protocol, the production of recombinant cholesterol oxidase was significantly enhanced from 3.2 to 158 U/L. Under the optimized condition, the enzyme was produced on a large-scale, and highly expressed cholesterol oxidase was purified from cell lysate by column nickel affinity chromatography. Km and Vmax values of the purified enzyme for cholesterol were estimated using Lineweaver–Burk plot. Further, the optimum pH and optimum temperature for the enzyme activity were also determined. We report a straightforward and easy protocol for cholesterol oxidase production which can be performed in any laboratory.
Collapse
|
22
|
Buldum G, Bismarck A, Mantalaris A. Recombinant biosynthesis of bacterial cellulose in genetically modified Escherichia coli. Bioprocess Biosyst Eng 2017; 41:265-279. [PMID: 29177720 PMCID: PMC5773641 DOI: 10.1007/s00449-017-1864-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 11/04/2017] [Indexed: 01/16/2023]
Abstract
Bacterial cellulose (BC) exhibits unique properties such as high purity compared to plant-based cellulose; however, commercial production of BC has remained a challenge, primarily due to the strain properties of cellulose-producing bacteria. Herein, we developed a functional and stable BC production system in genetically modified (GM) Escherichia coli by recombinant expression of both the BC synthase operon (bcsABCD) and the upstream operon (cmcax, ccpAx). BC production was achieved in GM HMS174 (DE3) and in GM C41 (DE3) by optimization of the culture temperature (22 °C, 30 °C, and 37 °C) and IPTG concentration. BC biosynthesis was detected much earlier in GM C41 (DE3) cultures (3 h after IPTG induction) than those of Gluconacetobacter hansenii. GM HMS174 (DE3) produced dense fibres having a length of approximately 1000–3000 μm and a diameter of 10–20 μm, which were remarkably larger than the fibres of BC typically produced by G. hansenii.
Collapse
Affiliation(s)
- Gizem Buldum
- Biological Systems Engineering Laboratory (BSEL), Department of Chemical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ UK
- Department of Bioengineering, Marmara University, Göztepe Campus, Istanbul, Turkey
| | - Alexander Bismarck
- Polymer and Composite Engineering (PaCE) Group, Department of Chemical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ UK
- Polymer and Composite Engineering (PaCE) Group, Institute of Materials Chemistry and Research, Faculty of Chemistry, University of Vienna, Währinger Str. 42, 1090 Vienna, Austria
| | - Athanasios Mantalaris
- Biological Systems Engineering Laboratory (BSEL), Department of Chemical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ UK
| |
Collapse
|
23
|
Abstract
The molecular chaperone Hsp90 is an essential member of the cellular proteostasis system. It plays an important role in the stabilisation and activation of a large number of client proteins and is involved in fatal disease processes, e.g. Alzheimer disease, cancer and cystic fibrosis. This makes Hsp90 a crucial protein to study. Mechanistic studies require large amounts of protein but the production and purification of recombinant human Hsp90 in Escherichia coli is challenging and laborious. Here we identified conditions that influence Hsp90 production, and optimised a fast and efficient purification protocol. We found that the nutrient value of the culturing medium and the length of induction had significant effect on Hsp90 production in Escherichia coli. Our fast, single-day purification protocol resulted in a stable, well-folded and pure sample that was resistant to degradation in a reproducible manner. We anticipate that our results provide a useful tool to produce higher amount of pure, well-folded and stable recombinant human Hsp90β in Escherichia coli in an efficient way.
Collapse
Affiliation(s)
- Martina Radli
- Cellular Protein Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, CH Utrecht, The Netherlands
- Science for Life, Utrecht University, CH Utrecht, The Netherlands
| | - Dmitry B. Veprintsev
- Laboratory of Biomolecular Research, Paul Scherrer Institut, Villigen PSI, Switzerland
- Department of Biology, ETH Zürich, Zürich, Switzerland
| | - Stefan G. D. Rüdiger
- Cellular Protein Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, CH Utrecht, The Netherlands
- Science for Life, Utrecht University, CH Utrecht, The Netherlands
- * E-mail:
| |
Collapse
|
24
|
Gholami Tilko P, Hajihassan Z, Moghimi H. Optimization of recombinant β-NGF expression in Escherichia coli using response surface methodology. Prep Biochem Biotechnol 2017; 47:406-413. [PMID: 27813712 DOI: 10.1080/10826068.2016.1252927] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Human nerve growth factor a member of the neurotrophin family can be used to treat neurodegenerative diseases. As it has disulfide bonds in its structure, periplasmic expression of it using appropriate signal sequence is beneficial. Therefore, in this work β-nerve growth factor (β-NGF) was expressed in Escherichia coli using pET39b expression vector containing DsbA signal sequence. In an initial step, the effect of isopropyl β-D-1-thiogalactopyranoside (IPTG) and lactose concentration as inducer on protein production was investigated using response surface methodology. Then the effect of different postinduction time and temperature on protein production was studied. Our results indicated that the highest β-NGF production was achieved with 1 mM IPTG and low concentrations of lactose (0-2% w/v), low cultivation temperature of 25°C and postinduction time of 2 hr. Also following β-NGF purification, bioassay test using PC12 cell line was done. The biological activity of the purified β-NGF showed a similar cell proliferation activity with the standard recombinant human β-NGF. In conclusion, the results indicated an optimized upstream process to obtain high yields of biologically active β-NGF.
Collapse
Affiliation(s)
- Pouria Gholami Tilko
- a Department of Life Science Engineering, Faculty of New Sciences and Technologies , University of Tehran , Tehran , Iran.,b Department of Microbial Biotechnology, School of Biology, College of Science , University of Tehran , Tehran , Iran
| | - Zahra Hajihassan
- a Department of Life Science Engineering, Faculty of New Sciences and Technologies , University of Tehran , Tehran , Iran
| | - Hamid Moghimi
- b Department of Microbial Biotechnology, School of Biology, College of Science , University of Tehran , Tehran , Iran
| |
Collapse
|
25
|
Pereira AM, Machado R, da Costa A, Ribeiro A, Collins T, Gomes AC, Leonor IB, Kaplan DL, Reis RL, Casal M. Silk-based biomaterials functionalized with fibronectin type II promotes cell adhesion. Acta Biomater 2017; 47:50-59. [PMID: 27713086 DOI: 10.1016/j.actbio.2016.10.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 09/20/2016] [Accepted: 10/02/2016] [Indexed: 12/13/2022]
Abstract
The objective of this work was to exploit the fibronectin type II (FNII) module from human matrix metalloproteinase-2 as a functional domain for the development of silk-based biopolymer blends that display enhanced cell adhesion properties. The DNA sequence of spider dragline silk protein (6mer) was genetically fused with the FNII coding sequence and expressed in Escherichia coli. The chimeric protein 6mer+FNII was purified by non-chromatographic methods. Films prepared from 6mer+FNII by solvent casting promoted only limited cell adhesion of human skin fibroblasts. However, the performance of the material in terms of cell adhesion was significantly improved when 6mer+FNII was combined with a silk-elastin-like protein in a concentration-dependent behavior. With this work we describe a novel class of biopolymer that promote cell adhesion and potentially useful as biomaterials for tissue engineering and regenerative medicine. STATEMENT OF SIGNIFICANCE This work reports the development of biocompatible silk-based composites with enhanced cell adhesion properties suitable for biomedical applications in regenerative medicine. The biocomposites were produced by combining a genetically engineered silk-elastin-like protein with a genetically engineered spider-silk-based polypeptide carrying the three domains of the fibronectin type II module from human metalloproteinase-2. These composites were processed into free-standing films by solvent casting and characterized for their biological behavior. To our knowledge this is the first report of the exploitation of all three FNII domains as a functional domain for the development of bioinspired materials with improved biological performance. The present study highlights the potential of using genetically engineered protein-based composites as a platform for the development of new bioinspired biomaterials.
Collapse
|
26
|
Deciphering the factors defining the pH-dependence of a commercial glycoside hydrolase family 8 enzyme. Enzyme Microb Technol 2017; 96:163-169. [DOI: 10.1016/j.enzmictec.2016.10.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 10/13/2016] [Accepted: 10/17/2016] [Indexed: 01/05/2023]
|
27
|
Antibiotic free selection for the high level biosynthesis of a silk-elastin-like protein. Sci Rep 2016; 6:39329. [PMID: 27982135 PMCID: PMC5159808 DOI: 10.1038/srep39329] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 10/14/2016] [Indexed: 12/13/2022] Open
Abstract
Silk-elastin-like proteins (SELPs) are a family of genetically engineered recombinant protein polymers exhibiting mechanical and biological properties suited for a wide range of applications in the biomedicine and materials fields. They are being explored as the next generation of biomaterials but low productivities and use of antibiotics during production undermine their economic viability and safety. We have developed an industrially relevant, scalable, fed-batch process for the high level production of a novel SELP in E. coli in which the commonly used antibiotic selection marker of the expression vector is exchanged for a post segregational suicide system, the separate-component-stabilisation system (SCS). SCS significantly augments SELP productivity but also enhances the product safety profile and reduces process costs by eliminating the use of antibiotics. Plasmid content increased following induction but no significant differences in plasmid levels were discerned when using SCS or the antibiotic selection markers under the controlled fed-batch conditions employed. It is suggested that the absence of competing plasmid-free cells improves host cell viability and enables increased productivity with SCS. With the process developed, 12.8 g L−1 purified SELP was obtained, this is the highest SELP productivity reported to date and clearly demonstrates the commercial viability of these promising polymers.
Collapse
|
28
|
Wang L, Li J, Zhao X, Qian C, Wei G, Zhu B, Liu C. Expression and characterization of a lipase-related protein in the malpighian tubules of the Chinese oak silkworm, Antheraea pernyi. BULLETIN OF ENTOMOLOGICAL RESEARCH 2016; 106:615-623. [PMID: 27297450 DOI: 10.1017/s0007485316000365] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Lipases are ubiquitous enzymes in nature, which play a crucial role in fat metabolism by catalyzing the hydrolysis of triacylglycerol to free fatty acids and glycerol. However, reports concerning insect lipase are rare. In this study, we studied the expression and activity of a lipase-related protein from Antheraea pernyi (ApLRP). Recombinant ApLRP was expressed in Escherichia coli cells and used to raise rabbit anti-ApLRP polyclonal antibodies. ApLRP mRNA and protein expression were abundant in the midgut and malpighian tubules, respectively. After challenge with four different microorganisms (E. coli, Beauveria bassiana, Micrococcus luteus and nuclear polyhedrosis virus), the expression levels of ApLRP mRNA in midgut were inducted significantly compared with the control. The different pathogens induced different ApLRP gene expression patterns. The optimum temperature and pH for the enzyme's activity were 35°C and 7.0, respectively. ApLRP activity was stimulated in the presence of Mg2+, Na+, Ca2+ and b-mercaptoethanol; while Zn2+, Cu2+ and Fe3+ inhibited its activity. Detergents such as SDS, glycerol and Tween-20 increased the lipase activity by 20-30%. Our results indicated that ApLRP might play an important role in the innate immunity of insects.
Collapse
Affiliation(s)
- L Wang
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| | - J Li
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| | - X Zhao
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| | - C Qian
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| | - G Wei
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| | - B Zhu
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| | - C Liu
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| |
Collapse
|
29
|
Cai M, Huang Y, Yang R, Craigie R, Clore GM. A simple and robust protocol for high-yield expression of perdeuterated proteins in Escherichia coli grown in shaker flasks. JOURNAL OF BIOMOLECULAR NMR 2016; 66:85-91. [PMID: 27709314 PMCID: PMC5866134 DOI: 10.1007/s10858-016-0052-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 08/05/2016] [Indexed: 05/03/2023]
Abstract
We present a simple, convenient and robust protocol for expressing perdeuterated proteins in E. coli BL21(DE3) cells in shaker flasks that reduces D2O usage tenfold and d7-glucose usage by 30 %. Using a modified M9 medium and optimized growth conditions, we were able to grow cells in linear log phase to an OD600 of up to 10. Inducing the cells with isopropyl β-D-1-thiogalactopyranoside at an OD600 of 10, instead of less than 1, enabled us to increase the cell mass tenfold per unit volume of cell culture. We show that protein expression levels per cell are the same when induced at an OD600 between 1 and 10 under these growth conditions. Thus, our new protocol can increase protein yield per unit volume of cell culture tenfold. Adaptation of E. coli from H2O-based to D2O-based medium is also key for ensuring high levels of protein expression in D2O. We find that a simple three-step adaptation approach-Luria-Bertani (LB) medium in H2O to LB in D2O to modified-M9 medium in D2O is both simple and reliable. The method increases the yield of perdeuterated proteins by up to tenfold using commonly available air shakers without any requirement for specialized fermentation equipment.
Collapse
Affiliation(s)
- Mengli Cai
- Laboratories of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892-0520, USA
| | - Ying Huang
- Laboratories of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892-0520, USA
| | - Renbin Yang
- Laboratories of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892-0520, USA
| | - Robert Craigie
- Laboratories of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892-0520, USA.
| | - G M Clore
- Laboratories of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892-0520, USA.
| |
Collapse
|
30
|
Wronska MA, O'Connor IB, Tilbury MA, Srivastava A, Wall JG. Adding Functions to Biomaterial Surfaces through Protein Incorporation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:5485-5508. [PMID: 27164952 DOI: 10.1002/adma.201504310] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 03/16/2016] [Indexed: 06/05/2023]
Abstract
The concept of biomaterials has evolved from one of inert mechanical supports with a long-term, biologically inactive role in the body into complex matrices that exhibit selective cell binding, promote proliferation and matrix production, and may ultimately become replaced by newly generated tissues in vivo. Functionalization of material surfaces with biomolecules is critical to their ability to evade immunorecognition, interact productively with surrounding tissues and extracellular matrix, and avoid bacterial colonization. Antibody molecules and their derived fragments are commonly immobilized on materials to mediate coating with specific cell types in fields such as stent endothelialization and drug delivery. The incorporation of growth factors into biomaterials has found application in promoting and accelerating bone formation in osteogenerative and related applications. Peptides and extracellular matrix proteins can impart biomolecule- and cell-specificities to materials while antimicrobial peptides have found roles in preventing biofilm formation on devices and implants. In this progress report, we detail developments in the use of diverse proteins and peptides to modify the surfaces of hard biomaterials in vivo and in vitro. Chemical approaches to immobilizing active biomolecules are presented, as well as platform technologies for isolation or generation of natural or synthetic molecules suitable for biomaterial functionalization.
Collapse
Affiliation(s)
- Małgorzata A Wronska
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - Iain B O'Connor
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - Maura A Tilbury
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - Akshay Srivastava
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - J Gerard Wall
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| |
Collapse
|
31
|
Dinjaski N, Kaplan DL. Recombinant protein blends: silk beyond natural design. Curr Opin Biotechnol 2016; 39:1-7. [DOI: 10.1016/j.copbio.2015.11.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Accepted: 11/17/2015] [Indexed: 11/28/2022]
|
32
|
Yang YX, Qian ZG, Zhong JJ, Xia XX. Hyper-production of large proteins of spider dragline silk MaSp2 by Escherichia coli via synthetic biology approach. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.01.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
33
|
Ott W, Nicolaus T, Gaub HE, Nash MA. Sequence-Independent Cloning and Post-Translational Modification of Repetitive Protein Polymers through Sortase and Sfp-Mediated Enzymatic Ligation. Biomacromolecules 2016; 17:1330-8. [DOI: 10.1021/acs.biomac.5b01726] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wolfgang Ott
- Center
for Integrated Protein Science Munich (CIPSM), Ludwig-Maximilians-Universität München, 81377 Munich, Germany
| | | | | | - Michael A. Nash
- Department
of Chemistry, University of Basel, 4056 Basel, Switzerland
- Department
of Biosystems Science and Engineering, Eidgenössische Technische Hochschule (ETH-Zürich), 4058 Basel, Switzerland
| |
Collapse
|
34
|
Soleyman MR, Khalili M, Khansarinejad B, Baazm M. High-level Expression and Purification of Active Human FGF-2 in Escherichia coli by Codon and Culture Condition Optimization. IRANIAN RED CRESCENT MEDICAL JOURNAL 2016; 18:e21615. [PMID: 27175305 PMCID: PMC4863364 DOI: 10.5812/ircmj.21615] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Revised: 07/30/2014] [Accepted: 08/20/2014] [Indexed: 12/19/2022]
Abstract
BACKGROUND Basic fibroblast growth factor (bFGF) is a member of a highly conserved superfamily of proteins that are involved in cell proliferation, differentiation, and migration. OBJECTIVES The objective of this study was to overexpress and purify the high-level active human bFGF in Escherichia coli (E. coli). MATERIALS AND METHODS This experimental study was conducted in the Islamic Republic of Iran. After codon optimization and gene synthesis, the optimized FGF-2 gene was subcloned into plasmid pET-32a. pET32-FGF-2 was transformed into E. coli BL21 for expression. The cultivation parameters were optimized to produce a high yield of FGF-2. RESULTS The optimal conditions were determined as follows: cultivation at 37°C in TB medium, with 1 mM isopropyl-β-D-thiogalactopyranoside (IPTG), followed by post-induction expression for 6 h. Under the abovementioned conditions, the expression volumetric productivity of FGF-2 reached 1.48 g/L. CONCLUSIONS A fusion tag from the pET32 expression plasmid permits the recovery of the recombinant fusion FGF-2 from E. coli, without affecting its biological activity.
Collapse
Affiliation(s)
- Mohammad Reza Soleyman
- Department of Biotechnology, School of Medicine, Arak University of Medical Sciences, Arak, IR Iran
| | - Mostafa Khalili
- Department of Biotechnology, School of Medicine, Arak University of Medical Sciences, Arak, IR Iran
| | - Behzad Khansarinejad
- Department of Microbilogy and Immunology, School of Medicine, Arak University of Medical Sciences, Arak, IR Iran
| | - Maryam Baazm
- Department of Anatomy, School of Medicine, Arak University of Medical Sciences, Arak, IR Iran
| |
Collapse
|
35
|
Chung H, Yang JE, Ha JY, Chae TU, Shin JH, Gustavsson M, Lee SY. Bio-based production of monomers and polymers by metabolically engineered microorganisms. Curr Opin Biotechnol 2015; 36:73-84. [DOI: 10.1016/j.copbio.2015.07.003] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Revised: 07/19/2015] [Accepted: 07/21/2015] [Indexed: 10/23/2022]
|
36
|
Thammasorn T, Sangsuriya P, Meemetta W, Senapin S, Jitrakorn S, Rattanarojpong T, Saksmerprome V. Large-scale production and antiviral efficacy of multi-target double-stranded RNA for the prevention of white spot syndrome virus (WSSV) in shrimp. BMC Biotechnol 2015; 15:110. [PMID: 26626024 PMCID: PMC4667486 DOI: 10.1186/s12896-015-0226-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 11/27/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND RNA interference (RNAi) is a specific and effective approach for inhibiting viral replication by introducing double-stranded (ds)RNA targeting the viral gene. In this study, we employed a combinatorial approach to interfere multiple gene functions of white spot syndrome virus (WSSV), the most lethal shrimp virus, using a single-batch of dsRNA, so-called "multi-WSSV dsRNA." A co-cultivation of RNase-deficient E. coli was developed to produce dsRNA targeting a major structural protein (VP28) and a hub protein (WSSV051) with high number of interacting protein partners. RESULTS For a co-cultivation of transformed E. coli, use of Terrific broth (TB) medium was shown to improve the growth of the E. coli and multi-WSSV dsRNA yields as compared to the use of Luria Bertani (LB) broth. Co-culture expression was conducted under glycerol feeding fed-batch fermentation. Estimated yield of multi-WSSV dsRNA (μg/mL culture) from the fed-batch process was 30 times higher than that obtained under a lab-scale culture with LB broth. Oral delivery of the resulting multi-WSSV dsRNA reduced % cumulative mortality and delayed average time to death compared to the non-treated group after WSSV challenge. CONCLUSION The present study suggests a co-cultivation technique for production of antiviral dsRNA with multiple viral targets. The optimal multi-WSSV dsRNA production was achieved by the use of glycerol feeding fed-batch cultivation with controlled pH and dissolved oxygen. The cultivation technique developed herein should be feasible for industrial-scale RNAi applications in shrimp aquaculture. Interference of multiple viral protein functions by a single-batch dsRNA should also be an ideal approach for RNAi-mediated fighting against viruses, especially the large and complicated WSSV.
Collapse
Affiliation(s)
- Thitiporn Thammasorn
- Center of Excellence for Shrimp Molecular Biology and Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand.
| | - Pakkakul Sangsuriya
- Department of Biochemistry, Center of Excellence for Molecular Biology and Genomics of Shrimp, Faculty of Science, Chulalongkorn University, Bangkok, Thailand. .,National Center of Genetic Engineering and Biotechnology, (BIOTEC), Thailand Science Park, Pathum Thani, 12120, Thailand.
| | - Watcharachai Meemetta
- Center of Excellence for Shrimp Molecular Biology and Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand.
| | - Saengchan Senapin
- Center of Excellence for Shrimp Molecular Biology and Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand. .,National Center of Genetic Engineering and Biotechnology, (BIOTEC), Thailand Science Park, Pathum Thani, 12120, Thailand.
| | - Sarocha Jitrakorn
- Center of Excellence for Shrimp Molecular Biology and Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand. .,National Center of Genetic Engineering and Biotechnology, (BIOTEC), Thailand Science Park, Pathum Thani, 12120, Thailand.
| | - Triwit Rattanarojpong
- Department of Microbiology, Faculty of Science, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand.
| | - Vanvimon Saksmerprome
- Center of Excellence for Shrimp Molecular Biology and Biotechnology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand. .,National Center of Genetic Engineering and Biotechnology, (BIOTEC), Thailand Science Park, Pathum Thani, 12120, Thailand.
| |
Collapse
|
37
|
Machado R, da Costa A, Sencadas V, Pereira AM, Collins T, Rodríguez-Cabello JC, Lanceros-Méndez S, Casal M. Exploring the Properties of Genetically Engineered Silk-Elastin-Like Protein Films. Macromol Biosci 2015. [DOI: 10.1002/mabi.201500132] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Raul Machado
- CBMA (Centre of Molecular and Environmental Biology); Department of Biology, University of Minho; Campus de Gualtar 4710-057 Braga Portugal
| | - André da Costa
- CBMA (Centre of Molecular and Environmental Biology); Department of Biology, University of Minho; Campus de Gualtar 4710-057 Braga Portugal
| | - Vitor Sencadas
- Centro/Departamento de Física; University of Minho; Campus de Gualtar 4710-057 Braga Portugal
- School of Mechanical, Materials and Mechatronics Engineering; University of Wollongong; Wollongong NSW 2522 Australia
| | - Ana Margarida Pereira
- CBMA (Centre of Molecular and Environmental Biology); Department of Biology, University of Minho; Campus de Gualtar 4710-057 Braga Portugal
| | - Tony Collins
- CBMA (Centre of Molecular and Environmental Biology); Department of Biology, University of Minho; Campus de Gualtar 4710-057 Braga Portugal
| | - José Carlos Rodríguez-Cabello
- Bioforge (Group for Advanced Materials and Nanobiotechnology); Universidad de Valladolid; 47011 Valladolid Spain
- Networking Research Centre on Bioengineering; Biomaterials and Nanomedicine (CIBER-BBN); 47011 Valladolid Spain
| | | | - Margarida Casal
- CBMA (Centre of Molecular and Environmental Biology); Department of Biology, University of Minho; Campus de Gualtar 4710-057 Braga Portugal
| |
Collapse
|
38
|
Lu J, Song Q, Ji Z, Liu X, Wang T, Kang Q. Fermentation optimization of maltose-binding protein fused to neutrophil-activating protein from Escherichia coli TB1. ELECTRON J BIOTECHN 2015. [DOI: 10.1016/j.ejbt.2015.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
|
39
|
Bataille L, Dieryck W, Hocquellet A, Cabanne C, Bathany K, Lecommandoux S, Garbay B, Garanger E. Expression and purification of short hydrophobic elastin-like polypeptides with maltose-binding protein as a solubility tag. Protein Expr Purif 2015; 110:165-71. [DOI: 10.1016/j.pep.2015.03.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 03/20/2015] [Accepted: 03/22/2015] [Indexed: 12/19/2022]
|
40
|
Kämpf MM, Braun M, Sirena D, Ihssen J, Thöny-Meyer L, Ren Q. In vivo production of a novel glycoconjugate vaccine against Shigella flexneri 2a in recombinant Escherichia coli: identification of stimulating factors for in vivo glycosylation. Microb Cell Fact 2015; 14:12. [PMID: 25612741 PMCID: PMC4308876 DOI: 10.1186/s12934-015-0195-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 01/12/2015] [Indexed: 11/26/2022] Open
Abstract
Background Glycoconjugated vaccines composed of polysaccharide antigens covalently linked to immunogenic carrier proteins have proved to belong to the most effective and safest vaccines for combating bacterial pathogens. The functional transfer of the N-glycosylation machinery from Campylobacter jejuni to the standard prokaryotic host Escherichia coli established a novel bioconjugation methodology termed bacterial glycoengineering. Results In this study, we report on the production of a new recombinant glycoconjugate vaccine against Shigella flexneri 2a representing the major serotype for global outbreaks of shigellosis. We demonstrate that S. flexneri 2a O-polysaccharides can be transferred to a detoxified variant of Pseudomonas aeruginosa carrier protein exotoxin A (EPA) by the C. jejuni oligosaccharyltransferase PglB, resulting in glycosylated EPA-2a. Moreover, we optimized the in vivo production of this novel vaccine by identification and quantitative analysis of critical process parameters for glycoprotein synthesis. It was found that sequential induction of oligosaccharyltransferase PglB and carrier protein EPA increased the specific productivity of EPA-2a by a factor of 1.6. Furthermore, by the addition of 10 g/L of the monosaccharide N-acetylglucosamine during induction, glycoconjugate vaccine yield was boosted up to 3.1-fold. The optimum concentration of Mg2+ ions for N-glycan transfer was determined to be 10 mM. Finally, optimized parameters were transferred to high cell density cultures with a 46-fold increase of overall yield of glycoconjugate compared to the one in initial shake flask production. Conclusion The present study is the first attempt to identify stimulating parameters for improved productivity of S. flexneri 2a bioconjugates. Optimization of glycosylation efficiency will ultimately foster the transfer of lab-scale expression to a cost-effective in vivo production process for a glycoconjugate vaccine against S. flexneri 2a in E. coli. This study is an important step towards this goal and provides a starting point for further optimization studies.
Collapse
Affiliation(s)
- Michael M Kämpf
- Laboratory for Biointerfaces, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, CH-9014, St. Gallen, Switzerland. .,GlycoVaxyn AG, Grabenstrasse 3, 8952, Schlieren, Switzerland.
| | - Martin Braun
- GlycoVaxyn AG, Grabenstrasse 3, 8952, Schlieren, Switzerland.
| | | | - Julian Ihssen
- Laboratory for Biointerfaces, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, CH-9014, St. Gallen, Switzerland.
| | - Linda Thöny-Meyer
- Laboratory for Biointerfaces, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, CH-9014, St. Gallen, Switzerland.
| | - Qun Ren
- Laboratory for Biointerfaces, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5, CH-9014, St. Gallen, Switzerland.
| |
Collapse
|
41
|
Huang W, Rollett A, Kaplan DL. Silk-elastin-like protein biomaterials for the controlled delivery of therapeutics. Expert Opin Drug Deliv 2014; 12:779-91. [PMID: 25476201 DOI: 10.1517/17425247.2015.989830] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
INTRODUCTION Genetically engineered biomaterials are useful for controlled delivery owing to their rational design, tunable structure-function, biocompatibility, degradability and target specificity. Silk-elastin-like proteins (SELPs), a family of genetically engineered recombinant protein polymers, possess these properties. Additionally, given the benefits of combining semi-crystalline silk-blocks and elastomeric elastin-blocks, SELPs possess multi-stimuli-responsive properties and tunability, thereby becoming promising candidates for targeted cancer therapeutics delivery and controlled gene release. AREAS COVERED An overview of SELP biomaterials for drug delivery and gene release is provided. Biosynthetic strategies used for SELP production, fundamental physicochemical properties and self-assembly mechanisms are discussed. The review focuses on sequence-structure-function relationships, stimuli-responsive features and current and potential drug delivery applications. EXPERT OPINION The tunable material properties allow SELPs to be pursued as promising biomaterials for nanocarriers and injectable drug release systems. Current applications of SELPs have focused on thermally-triggered biomaterial formats for the delivery of therapeutics, based on local hyperthermia in tumors or infections. Other prominent controlled release applications of SELPs as injectable hydrogels for gene release have also been pursued. Further biomedical applications that utilize other stimuli to trigger the reversible material responses of SELPs for targeted delivery, including pH, ionic strength, redox, enzymatic stimuli and electric field, are in progress. Exploiting these additional stimuli-responsive features will provide a broader range of functional biomaterials for controlled therapeutics release and tissue regeneration.
Collapse
Affiliation(s)
- Wenwen Huang
- Tufts University, Department of Biomedical Engineering , 4 Colby Street, Medford, MA 02155 , USA
| | | | | |
Collapse
|
42
|
Bruschi M, Krömer JO, Steen JA, Nielsen LK. Production of the short peptide surfactant DAMP4 from glucose or sucrose in high cell density cultures of Escherichia coli BL21(DE3). Microb Cell Fact 2014; 13:99. [PMID: 25134850 PMCID: PMC4229601 DOI: 10.1186/s12934-014-0099-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 06/26/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Peptides are increasingly used in industry as highly functional materials. Bacterial production of recombinant peptides has the potential to provide large amounts of renewable and low cost peptides, however, achieving high product titers from Chemically Defined Media (CDM) supplemented with simple sugars remains challenging. RESULTS In this work, the short peptide surfactant, DAMP4, was used as a model peptide to investigate production in Escherichia coli BL21(DE3), a classical strain used for protein production. Under the same fermentation conditions, switching production of DAMP4 from rich complex media to CDM resulted in a reduction in yield that could be attributed to the reduction in final cell density more so than a significant reduction in specific productivity. To maximize product titer, cell density at induction was maximized using a fed-batch approach. In fed-batch DAMP4 product titer increased 9-fold compared to batch, while maintaining 60% specific productivity. Under the fed-batch conditions, the final product titer of DAMP4 reached more than 7 g/L which is the highest titer of DAMP4 reported to date. To investigate production from sucrose, sucrose metabolism was engineered into BL21(DE3) using a simple plasmid approach. Using this strain, growth and DAMP4 production characteristics obtained from CDM supplemented with sucrose were similar to those obtained when culturing the parent strain on CDM supplemented with glucose. CONCLUSIONS Production of a model peptide was increased to several grams per liter using a CDM medium with either glucose or sucrose feedstock. It is hoped that this work will contribute cost reduction for production of designer peptide surfactants to facilitate their commercial application.
Collapse
Affiliation(s)
| | - Jens O Krömer
- Centre for Microbial Electrosynthesis (CEMES), Advanced Water Management Centre (AWMC), Research Road (Bldg 60), The University of Queensland, St, Lucia 4072, QLD, Australia.
| | | | | |
Collapse
|
43
|
Horizontal gene transfer of a bacterial insect toxin gene into the Epichloë fungal symbionts of grasses. Sci Rep 2014; 4:5562. [PMID: 24990771 PMCID: PMC4080199 DOI: 10.1038/srep05562] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 06/17/2014] [Indexed: 12/11/2022] Open
Abstract
Horizontal gene transfer is recognized as an important factor in genome evolution, particularly when the newly acquired gene confers a new capability to the recipient species. We identified a gene similar to the makes caterpillars floppy (mcf1 and mcf2) insect toxin genes in Photorhabdus, bacterial symbionts of nematodes, in the genomes of the Epichloë fungi, which are intercellular symbionts of grasses. Infection by Epichloë spp. often confers insect resistance to the grass hosts, largely due to the production of fungal alkaloids. A mcf-like gene is present in all of the Epichloë genome sequences currently available but in no other fungal genomes. This suggests the Epichloë genes were derived from a single lineage-specific HGT event. Molecular dating was used to estimate the time of the HGT event at between 7.2 and 58.8 million years ago. The mcf-like coding sequence from Epichloë typhina subsp. poae was cloned and expressed in Escherichia coli. E. coli cells expressing the Mcf protein were toxic to black cutworms (Agrotis ipsilon), whereas E. coli cells containing the vector only were non-toxic. These results suggest that the Epichloëmcf-like genes may be a component, in addition to the fungal alkaloids, of the insect resistance observed in Epichloë-infected grasses.
Collapse
|
44
|
Collins T, Barroca M, Branca F, Padrão J, Machado R, Casal M. High Level Biosynthesis of a Silk-Elastin-like Protein in E. coli. Biomacromolecules 2014; 15:2701-8. [DOI: 10.1021/bm5005564] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tony Collins
- Centre
of Molecular and Environmental
Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Mário Barroca
- Centre
of Molecular and Environmental
Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Fernando Branca
- Centre
of Molecular and Environmental
Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Jorge Padrão
- Centre
of Molecular and Environmental
Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Raul Machado
- Centre
of Molecular and Environmental
Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Margarida Casal
- Centre
of Molecular and Environmental
Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| |
Collapse
|
45
|
Expression of liver-targeting peptide modified recombinant human endostatin and preliminary study of its biological activities. Appl Microbiol Biotechnol 2014; 98:7923-33. [PMID: 24908076 DOI: 10.1007/s00253-014-5818-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Revised: 05/03/2014] [Accepted: 05/06/2014] [Indexed: 12/15/2022]
Abstract
Recombinant human endostatin (rEndostatin or endostar) has been shown to inhibit endothelial cells proliferation, migration, and angiogenesis and exhibits a broad spectrum of activities against solid tumors. However, rEndostatin is easily degradable and evenly distributed to all tissues. Selectively delivering rEndostatin to the lesion site might be more potent. The circumsporozoite protein (CSP) coats the malarial sporozoite and targets the liver for infection; I-plus of N end of CSP could specifically bind to the liver. Based on this, we hypothesize the fusion protein with introducing the CSP I-plus sequence into rEndostatin (rES-CSP) of which not only targets the liver, but also inhibits endothelial cells proliferation, migration, and tube formation. Therefore, it selectively reduces angiogenesis of hepatocellular carcinoma (HCC) and improves the anti-HCC effect. In this study, we synthesized a novel rES-CSP fusion gene by SOE-PCR and expressed the fusion protein in Escherichia coli BL2l (DE3). The suitable conditions were optimized by an orthogonal test (L(25)(5)(4)). The yields were 12 mg/l culture medium following refolding and purification on nickel-nitrilotriacetic acid (Ni-NTA) metal affinity chromatography matrices. The purified rES-CSP is specifically targeted to the hepatocyte and inhibited the proliferation and migration of human umbilical vein endothelial cells (HUVECs) in a dose-dependent manner and showed potent antiangiogenic capability on HUVECs tube formation assay and chick embryo chorioallantoic membrane (CAM) assay. These results lay the foundation for the further study of its targeting and anti-HCC in vivo and provide a feasible and convenient approach to produce liver-targeting drugs for treatment of the liver diseases.
Collapse
|
46
|
Espírito Santo GM, Pedro AQ, Oppolzer D, Bonifácio MJ, Queiroz JA, Silva F, Passarinha LA. Development of fed-batch profiles for efficient biosynthesis of catechol- O-methyltransferase. ACTA ACUST UNITED AC 2014. [PMID: 28626646 PMCID: PMC5466112 DOI: 10.1016/j.btre.2014.05.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Constant feeds perform better than exponential feeds for hSCOMT production. A constant feed of 1 g/L/h yielded 40 OD600 and a hSCOMT activity of 442 nmol/h/mg. A high percentage of viability was maintained in constant fed-batch fermentations.
Catechol-O-methyltransferase (COMT, EC 2.1.1.6) plays a crucial role in dopamine metabolism which has intimately linked this enzyme to some neurodegenerative diseases, such as Parkinson's disease. In recent years, in the attempt of developing new therapeutic strategies for Parkinson's disease, there has been a growing interest in the search for effective COMT inhibitors. In order to do so, large amounts of COMT in an active form are needed, and the best way to achieve this is by up-scaling its production through biotechnological processes. In this work, a fed-batch process for the biosynthesis of the soluble isoform of COMT in Escherichia coli is proposed. This final process was selected through the evaluation of the effect of different dissolved oxygen concentrations, carbon and nitrogen source concentrations and feeding profiles on enzymatic production and cell viability, while controlling various parameters (pH, temperature, starting time of the feeding and induction phases and carbon source concentration) during the process. After several batch and fed-batch experiments, a final specific COMT activity of 442.34 nmol/h/mg with approximately 80% of viable cells at the end of the fermentation were achieved. Overall, the results described herein provide a great improvement on hSCOMT production in recombinant bacteria and provide a new and viable option for the use of a fed-batch fermentation with a constant feeding profile to the large scale production of this enzyme.
Collapse
Affiliation(s)
- G M Espírito Santo
- CICS - UBI - Centro de Investigação em Ciências da Saúde, Faculdade de Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal
| | - A Q Pedro
- CICS - UBI - Centro de Investigação em Ciências da Saúde, Faculdade de Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal
| | - D Oppolzer
- CICS - UBI - Centro de Investigação em Ciências da Saúde, Faculdade de Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal
| | - M J Bonifácio
- Bial, Departamento de Investigação e Desenvolvimento, São Mamede do Coronado, Porto, Portugal
| | - J A Queiroz
- CICS - UBI - Centro de Investigação em Ciências da Saúde, Faculdade de Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal
| | - F Silva
- CICS - UBI - Centro de Investigação em Ciências da Saúde, Faculdade de Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal
| | - L A Passarinha
- CICS - UBI - Centro de Investigação em Ciências da Saúde, Faculdade de Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal
| |
Collapse
|
47
|
Machado R, da Costa A, Sencadas V, Garcia-Arévalo C, Costa CM, Padrão J, Gomes A, Lanceros-Méndez S, Rodríguez-Cabello JC, Casal M. Electrospun silk-elastin-like fibre mats for tissue engineering applications. Biomed Mater 2013; 8:065009. [DOI: 10.1088/1748-6041/8/6/065009] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
48
|
Abstract
In the present paper we describe a new carboxylic acid transporter in Escherichia coli encoded by the gene yaaH. In contrast to what had been described for other YaaH family members, the E. coli transporter is highly specific for acetic acid (a monocarboxylate) and for succinic acid (a dicarboxylate), with affinity constants at pH 6.0 of 1.24±0.13 mM for acetic acid and 1.18±0.10 mM for succinic acid. In glucose-grown cells the ΔyaaH mutant is compromised for the uptake of both labelled acetic and succinic acids. YaaH, together with ActP, described previously as an acetate transporter, affect the use of acetic acid as sole carbon and energy source. Both genes have to be deleted simultaneously to abolish acetate transport. The uptake of acetate and succinate was restored when yaaH was expressed in trans in ΔyaaH ΔactP cells. We also demonstrate the critical role of YaaH amino acid residues Leu131 and Ala164 on the enhanced ability to transport lactate. Owing to its functional role in acetate and succinate uptake we propose its assignment as SatP: the Succinate–Acetate Transporter Protein.
Collapse
|