1
|
Możejko‐Ciesielska J, Moraczewski K, Czaplicki S. Halomonas alkaliantarctica as a platform for poly(3-hydroxybutyrate-co-3-hydroxyvalerate) production from biodiesel-derived glycerol. ENVIRONMENTAL MICROBIOLOGY REPORTS 2024; 16:e13225. [PMID: 38146695 PMCID: PMC10866086 DOI: 10.1111/1758-2229.13225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 12/04/2023] [Indexed: 12/27/2023]
Abstract
Polyhydroxyalkanoates (PHAs) are biodegradable polyesters produced by a wide range of microorganisms, including extremophiles. These unique microorganisms have gained interest in PHA production due to their ability to utilise low-cost carbon sources under extreme conditions. In this study, Halomonas alkaliantarctica was examined with regards to its potential to produce PHAs using crude glycerol from biodiesel industry as the only carbon source. We found that cell dry mass concentration was not dependent on the applying substrate concentration. Furthermore, our data confirmed that the analysed halophile was capable of metabolising crude glycerol into poly(3-hydroxybutyrate-co-3-hydroxyvalerate) copolymer within 24 h of the cultivation without addition of any precursors. Moreover, crude glycerol concentration affects the repeat units content in the purified PHAs copolymers and their thermal properties. Nevertheless, a differential scanning calorimetric and thermogravimetric analysis showed that the analysed biopolyesters have properties suitable for various applications. Overall, this study described a promising approach for the valorisation of crude glycerol as a future strategy of industrial waste management to produce high value microbial biopolymers.
Collapse
Affiliation(s)
- Justyna Możejko‐Ciesielska
- Department of Microbiology and Mycology, Faculty of Biology and BiotechnologyUniversity of Warmia and Mazury in OlsztynOlsztynPoland
| | | | - Sylwester Czaplicki
- Department of Plant Food Chemistry and ProcessingUniversity of Warmia and Mazury in OlsztynOlsztynPoland
| |
Collapse
|
2
|
Bhalerao A, Dueker U, Weber M, Eich A, Lott C, Endres HJ, Nogueira R. Bacterial diversity of biofilms on polyhydroxybutyrate exposed to marine conditions: Ex-situ vs. in-situ tests. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 905:167458. [PMID: 37777124 DOI: 10.1016/j.scitotenv.2023.167458] [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: 06/26/2023] [Revised: 09/18/2023] [Accepted: 09/27/2023] [Indexed: 10/02/2023]
Abstract
Biofilms form on any available surface and, depending on the characteristics of the material and the environmental conditions, biodegradation can take place. We compared the bacterial composition of polyhydroxybutyrate (PHB)-related biofilm communities from marine ex-situ and in-situ tests to assess the differences in diversity and abundance between these two biofilms. This comparison will help to better assess the transferability of tank tests to real-life scenarios. The in-situ tests were set up in the Mediterranean Sea on the Island of Elba, Italy where PHB-tensile bars were lodged in the sediments. This created a water-exposed aerobic and mud-planted anaerobic scenario. The ex-situ tests were modeled after in-situ tests and performed in temperature-controlled tanks. The PHB-related biofilms were harvested after 240 days of exposure along with planktonic bacteria, and particle- and sediment-related biofilm. The bacterial composition was elucidated using 16S rDNA sequencing. Biofilms harvested from the in-situ test were more diverse, less even, and contained more rare species compared to biofilms from the ex-situ test. The PHB-related biofilm was characterized by a higher abundance of the bacterial order Desulfobacterales. The composition of PHB-related biofilm varied significantly between the two tests and between aerobic and anaerobic conditions. The composition of PHB-related biofilm was significantly different from planktonic bacteria, particle, and sediment-related biofilm, showing the influence of PHB on the biofilm composition. Thus, the ex-situ tank test for PHB degradation cannot, in terms of bacterial composition, simulate the in-situ conditions to their full extent.
Collapse
Affiliation(s)
- Aniruddha Bhalerao
- Institute of Sanitary Engineering and Waste Management, Leibniz University Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Urda Dueker
- Institute of Sanitary Engineering and Waste Management, Leibniz University Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Miriam Weber
- HYDRA Marine Sciences GmbH, Steinfeldweg 15, 77815 Bühl, Germany
| | - Andreas Eich
- HYDRA Marine Sciences GmbH, Steinfeldweg 15, 77815 Bühl, Germany
| | - Christian Lott
- HYDRA Marine Sciences GmbH, Steinfeldweg 15, 77815 Bühl, Germany
| | - Hans Josef Endres
- Institute for Plastics and Circulation Technology, Leibniz University Hannover, An der Universität 2, 30823 Garbsen, Germany
| | - Regina Nogueira
- Institute of Sanitary Engineering and Waste Management, Leibniz University Hannover, Welfengarten 1, D-30167 Hannover, Germany.
| |
Collapse
|
3
|
Mozejko-Ciesielska J, Moraczewski K, Czaplicki S, Singh V. Production and characterization of polyhydroxyalkanoates by Halomonas alkaliantarctica utilizing dairy waste as feedstock. Sci Rep 2023; 13:22289. [PMID: 38097607 PMCID: PMC10721877 DOI: 10.1038/s41598-023-47489-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 11/14/2023] [Indexed: 12/17/2023] Open
Abstract
Currently, the global demand for polyhydroxyalkanoates (PHAs) is significantly increasing. PHAs are produced by several bacteria that are an alternative source of synthetic polymers derived from petrochemical refineries. This study established a simple and more feasible process of PHA production by Halomonas alkaliantarctica using dairy waste as the only carbon source. The data confirmed that the analyzed halophile could metabolize cheese whey (CW) and cheese whey mother liquor (CWML) into biopolyesters. The highest yield of PHAs was 0.42 g/L in the cultivation supplemented with CWML. Furthermore, it was proved that PHA structure depended on the type of by-product from cheese manufacturing, its concentration, and the culture time. The results revealed that H. alkaliantarctica could produce P(3HB-co-3HV) copolymer in the cultivations with CW at 48 h and 72 h without adding of any precursors. Based on the data obtained from physicochemical and thermal analyses, the extracted copolymer was reported to have properties suitable for various applications. Overall, this study described a promising approach for valorizing of dairy waste as a future strategy of industrial waste management to produce high value microbial biopolymers.
Collapse
Affiliation(s)
- Justyna Mozejko-Ciesielska
- Department of Microbiology and Mycology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10719, Olsztyn, Poland.
| | - Krzysztof Moraczewski
- Institute of Materials Engineering, Kazimierz Wielki University, 85064, Bydgoszcz, Poland
| | - Sylwester Czaplicki
- Department of Plant Food Chemistry and Processing, Faculty of Food Science, University of Warmia and Mazury in Olsztyn, Pl. Cieszyński 1, 10726, Olsztyn, Poland
| | - Vijai Singh
- Department of Biosciences, School of Science, Indrashil University, Rajpur, Mehsana, 382715, India
| |
Collapse
|
4
|
Alfano S, Pagnanelli F, Martinelli A. Rapid Estimation of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Composition Using ATR-FTIR. Polymers (Basel) 2023; 15:4127. [PMID: 37896375 PMCID: PMC10611011 DOI: 10.3390/polym15204127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/11/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
A great research effort is involved in polyhydroxyalkanoates (PHAs) production and characterization since they are an attractive degradable polyester family that potentially could substitute oil-based polymers. This is due to two main key factors: their production is sustainable, being that they are produced by microorganisms possibly fed by organic waste-derived products, and they are degradable. Moreover, PHAs' thermal and mechanical properties could be tuned by varying their monomeric composition through the proper selection of microorganism feedstock and bioreactor operative conditions. Hence, a rapid and facile determination of the PHA chemical structure by widely available instrumentation is useful. As an alternative to the standard gas-chromatographic method, a new procedure for the composition determination of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (P3HBV), the most common PHA copolymer, by attenuated total reflection FTIR (ATR-FTIR) is presented. It is based on the linear dependence of selected and normalized absorption band intensity with the molar fraction of repeating units. To break free from the crystallinity variability, which affects the result reproducibility and data scattering, the polymer sample was rapidly quenched from the melt directly on the surface of the ATR internal reflection element and analyzed. The data obtained from 14 samples with a molar fraction of 3-hydroxybutyrate repeating units (X3HB) ranging from 0.15 to 1 were analyzed. According to preliminary analyses, the normalized intensity of two absorption bands was selected to develop a calibration method able to predict X3HB of unknown samples and to evaluate the related uncertainty through prediction intervals of inverse regression. The proposed method proves to be useful for an easy and rapid estimation of P3HBV composition.
Collapse
Affiliation(s)
| | | | - Andrea Martinelli
- Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy; (S.A.); (F.P.)
| |
Collapse
|
5
|
Biosynthesis and Properties of Sulfur-Containing Polyhydroxyalkanoates (PHAs) Produced by Wild-Type Strain Cupriavidus necator B-10646. Polymers (Basel) 2023; 15:polym15041005. [PMID: 36850288 PMCID: PMC9963769 DOI: 10.3390/polym15041005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/09/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
The study addresses the growth of the wild-type strain Cupriavidus necator B-10646 and the synthesis of sulfur-containing polyhydroxyalkanoates (PHA) by this strain on media containing fructose and three different precursors (3-mercaptopropionic acid, 3',3'-dithiodipropionic acid and 3',3'-thiodipropionic acid). By varying the concentration and number of doses of the precursors added into the bacterial culture, it was possible to find conditions that ensure the formation of 3-mercaptopropionate (3MP) monomers from the precursors and their incorporation into the C-chain of poly(3-hydroxybutyrate). A series of P(3HB-co-3MP) copolymer samples with different content of 3MP monomers (from 2.04 to 39.0 mol.%) were synthesized and the physicochemical properties were studied. The effect of 3MP monomers is manifested in a certain decrease in the molecular weight of the samples and an increase in polydispersity. Temperature changes are manifested in the appearance of two peaks in the melting region with different intervals regardless of the 3MP content. The studied P(3HB-co-3MP) samples, regardless of the content of 3MP monomers, are characterized by equalization of the ratio of the amorphous and crystalline phases and have a close degree of crystallinity with a minimum of 42%, = and a maximum of 54%.
Collapse
|
6
|
Biosynthesis and Properties of a P(3HB- co-3HV- co-4HV) Produced by Cupriavidus necator B-10646. Polymers (Basel) 2022; 14:polym14194226. [PMID: 36236173 PMCID: PMC9570873 DOI: 10.3390/polym14194226] [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: 09/04/2022] [Revised: 09/23/2022] [Accepted: 10/07/2022] [Indexed: 11/17/2022] Open
Abstract
Synthesis of P(3HB-co-3HV-co-4HV) copolymers by the wild-type strain Cupriavidus necator B-10646 on fructose or sodium butyrate as the main C-substrate with the addition of γ-valerolactone as a precursor of 3HV and 4HV monomers was studied. Bacterial cells were cultivated in the modes that enabled production of a series of copolymers with molar fractions of 3HV (from 7.3 to 23.4 mol.%) and 4HV (from 1.9 to 4.7 mol.%) with bacterial biomass concentration (8.2 ± 0.2 g/L) and PHA content (80 ± 2%). Using HPLC, DTA, DSC, X-Ray, SEM, and AFM, the physicochemical properties of copolymers and films prepared from them have been investigated as dependent on proportions of monomers. Copolymers are characterized by a reduced degree of crystallinity (Cx 38-49%) molecular weight characteristics Mn (45-87 kDa), and Mw (201-248 kDa) compared with P(3HB). The properties of the films surface of various composition including the porosity and surface roughness were studied. Most of the samples showed a decrease in the average pore area and an increase in their number with a total increase in 3HV and 4HV monomers. The results allow scaling up the productive synthesis of P(3HB-co-3HV-co-4HV) copolymers using Cupriavidus necator B-10646.
Collapse
|
7
|
Polyhydroxyalkanoate Decelerates the Release of Paclitaxel from Poly(lactic-co-glycolic acid) Nanoparticles. Pharmaceutics 2022; 14:pharmaceutics14081618. [PMID: 36015244 PMCID: PMC9416746 DOI: 10.3390/pharmaceutics14081618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/25/2022] [Accepted: 07/28/2022] [Indexed: 11/17/2022] Open
Abstract
Biodegradable nanoparticles (NPs) are preferred as drug carriers because of their effectiveness in encapsulating drugs, ability to control drug release, and low cytotoxicity. Although poly(lactide co-glycolide) (PLGA)-based NPs have been used for controlled release strategies, they have some disadvantages. This study describes an approach using biodegradable polyhydroxyalkanoate (PHA) to overcome these challenges. By varying the amount of PHA, NPs were successfully fabricated by a solvent evaporation method. The size range of the NPS ranged from 137.60 to 186.93 nm, and showed zero-order release kinetics of paclitaxel (PTX) for 7 h, and more sustained release profiles compared with NPs composed of PLGA alone. Increasing the amount of PHA improved the PTX loading efficiency of NPs. Overall, these findings suggest that PHA can be used for designing polymeric nanocarriers, which offer a potential strategy for the development of improved drug delivery systems for sustained and controlled release.
Collapse
|
8
|
Szacherska K, Moraczewski K, Rytlewski P, Czaplicki S, Ciesielski S, Oleskowicz-Popiel P, Mozejko-Ciesielska J. Polyhydroxyalkanoates production from short and medium chain carboxylic acids by Paracoccus homiensis. Sci Rep 2022; 12:7263. [PMID: 35508573 PMCID: PMC9068790 DOI: 10.1038/s41598-022-11114-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 04/12/2022] [Indexed: 11/09/2022] Open
Abstract
The aim of this study was to evaluate an effect of short and medium chain carboxylic acids (CAs) rich stream derived from acidogenic mixed culture fermentation of acid whey on polyhydroxyalkanoates (PHAs) synthesis by Paracoccus homiensis and compare it with the impact of individual synthetic CAs. The obtained results confirmed that the analyzed bacterium is able to metabolize synthetic CAs as the only carbon sources in the growth medium with maximum PHAs production yields of 26% of cell dry mass (CDM). The replacement of the individual CAs by a CAs-rich residual stream was found to be beneficial for the Paracoccus homiensis growth. The highest biomass concentration reached about 2.5 g/L with PHAs content of 17% of CDM. The purified PHAs were identified as poly(3-hydroxybutyrate-co-3-hydroxyvalerate) by applying gas chromatography coupled with mass spectrometry, Fourier transform infrared spectroscopic spectra and UV–Vis spectra. Furthermore, a differential scanning calorimetric, thermogravimetric and water contact angle analysis proved that the extracted copolymers have useful properties. The obtained data are promising in the perspective of developing a microbial PHAs production as a part of an integrated valorization process of high CAs content waste-derived streams.
Collapse
Affiliation(s)
- Karolina Szacherska
- Department of Microbiology and Mycology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719, Olsztyn, Poland
| | - Krzysztof Moraczewski
- Institute of Materials Engineering, Kazimierz Wielki University, 85-064, Bydgoszcz, Poland
| | - Piotr Rytlewski
- Institute of Materials Engineering, Kazimierz Wielki University, 85-064, Bydgoszcz, Poland
| | - Sylwester Czaplicki
- Department of Plant Food Chemistry and Processing, University of Warmia and Mazury in Olsztyn, Pl. Cieszyński 1, 10-726, Olsztyn, Poland
| | - Sławomir Ciesielski
- Department of Environmental Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719, Olsztyn, Poland
| | - Piotr Oleskowicz-Popiel
- Water Supply and Bioeconomy Division, Faculty of Environmental Engineering and Energy, Poznan University of Technology, 60-965, Poznan, Poland
| | - Justyna Mozejko-Ciesielska
- Department of Microbiology and Mycology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719, Olsztyn, Poland.
| |
Collapse
|
9
|
Zhila NO, Sapozhnikova KY, Kiselev EG, Vasiliev AD, Nemtsev IV, Shishatskaya EI, Volova TG. Properties of Degradable Polyhydroxyalkanoates (PHAs) Synthesized by a New Strain, Cupriavidus necator IBP/SFU-1, from Various Carbon Sources. Polymers (Basel) 2021; 13:polym13183142. [PMID: 34578042 PMCID: PMC8468435 DOI: 10.3390/polym13183142] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 12/15/2022] Open
Abstract
The bacterial strain isolated from soil was identified as Cupriavidus necator IBP/SFU-1 and investigated as a PHA producer. The strain was found to be able to grow and synthesize PHAs under autotrophic conditions and showed a broad organotrophic potential towards different carbon sources: sugars, glycerol, fatty acids, and plant oils. The highest cell concentrations (7–8 g/L) and PHA contents were produced from oleic acid (78%), fructose, glucose, and palm oil (over 80%). The type of the carbon source influenced the PHA chemical composition and properties: when grown on oleic acid, the strain synthesized the P(3HB-co-3HV) copolymer; on plant oils, the P(3HB-co-3HV-co-3HHx) terpolymer, and on the other substrates, the P(3HB) homopolymer. The type of the carbon source influenced molecular-weight properties of PHAs: P(3HB) synthesized under autotrophic growth conditions, from CO2, had the highest number-average (290 ± 15 kDa) and weight-average (850 ± 25 kDa) molecular weights and the lowest polydispersity (2.9 ± 0.2); polymers synthesized from organic carbon sources showed increased polydispersity and reduced molecular weight. The carbon source was not found to affect the degree of crystallinity and thermal properties of the PHAs. The type of the carbon source determined not only PHA composition and molecular weight but also surface microstructure and porosity of the polymer films. The new strain can be recommended as a promising P(3HB) producer from palm oil, oleic acid, and sugars (fructose and glucose) and as a producer of P(3HB-co-3HV) from oleic acid and P(3HB-co-3HV-co-3HHx) from palm oil.
Collapse
Affiliation(s)
- Natalia O. Zhila
- Basic Department of Biotechnology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., 660041 Krasnoyarsk, Russia; (K.Y.S.); (E.G.K.); (A.D.V.); (I.V.N.); (E.I.S.); (T.G.V.)
- Federal Research Center “Krasnoyarsk Science Center SB RAS”, Institute of Biophysics SB RAS, 50/50 Akademgorodok, 660036 Krasnoyarsk, Russia
- Correspondence: ; Tel.: +7-391-290-54-91; Fax: +7-391-243-34-00
| | - Kristina Yu. Sapozhnikova
- Basic Department of Biotechnology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., 660041 Krasnoyarsk, Russia; (K.Y.S.); (E.G.K.); (A.D.V.); (I.V.N.); (E.I.S.); (T.G.V.)
- Federal Research Center “Krasnoyarsk Science Center SB RAS”, Institute of Biophysics SB RAS, 50/50 Akademgorodok, 660036 Krasnoyarsk, Russia
| | - Evgeniy G. Kiselev
- Basic Department of Biotechnology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., 660041 Krasnoyarsk, Russia; (K.Y.S.); (E.G.K.); (A.D.V.); (I.V.N.); (E.I.S.); (T.G.V.)
- Federal Research Center “Krasnoyarsk Science Center SB RAS”, Institute of Biophysics SB RAS, 50/50 Akademgorodok, 660036 Krasnoyarsk, Russia
| | - Alexander D. Vasiliev
- Basic Department of Biotechnology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., 660041 Krasnoyarsk, Russia; (K.Y.S.); (E.G.K.); (A.D.V.); (I.V.N.); (E.I.S.); (T.G.V.)
- Federal Research Center “Krasnoyarsk Science Center SB RAS”, L.V. Kirensky Institute of Physics SB RAS, 50/38 Akademgorodok, 660036 Krasnoyarsk, Russia
| | - Ivan V. Nemtsev
- Basic Department of Biotechnology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., 660041 Krasnoyarsk, Russia; (K.Y.S.); (E.G.K.); (A.D.V.); (I.V.N.); (E.I.S.); (T.G.V.)
- Federal Research Center “Krasnoyarsk Science Center SB RAS”, L.V. Kirensky Institute of Physics SB RAS, 50/38 Akademgorodok, 660036 Krasnoyarsk, Russia
- Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 50 Akademgorodok, 660036 Krasnoyarsk, Russia
| | - Ekaterina I. Shishatskaya
- Basic Department of Biotechnology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., 660041 Krasnoyarsk, Russia; (K.Y.S.); (E.G.K.); (A.D.V.); (I.V.N.); (E.I.S.); (T.G.V.)
- Federal Research Center “Krasnoyarsk Science Center SB RAS”, Institute of Biophysics SB RAS, 50/50 Akademgorodok, 660036 Krasnoyarsk, Russia
| | - Tatiana G. Volova
- Basic Department of Biotechnology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., 660041 Krasnoyarsk, Russia; (K.Y.S.); (E.G.K.); (A.D.V.); (I.V.N.); (E.I.S.); (T.G.V.)
- Federal Research Center “Krasnoyarsk Science Center SB RAS”, Institute of Biophysics SB RAS, 50/50 Akademgorodok, 660036 Krasnoyarsk, Russia
| |
Collapse
|
10
|
Haloarchaea as Cell Factories to Produce Bioplastics. Mar Drugs 2021; 19:md19030159. [PMID: 33803653 PMCID: PMC8003077 DOI: 10.3390/md19030159] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/03/2021] [Accepted: 03/16/2021] [Indexed: 11/16/2022] Open
Abstract
Plastic pollution is a worldwide concern causing the death of animals (mainly aquatic fauna) and environmental deterioration. Plastic recycling is, in most cases, difficult or even impossible. For this reason, new research lines are emerging to identify highly biodegradable bioplastics or plastic formulations that are more environmentally friendly than current ones. In this context, microbes, capable of synthesizing bioplastics, were revealed to be good models to design strategies in which microorganisms can be used as cell factories. Recently, special interest has been paid to haloarchaea due to the capability of some species to produce significant concentrations of polyhydroxyalkanoate (PHA), polyhydroxybutyrate (PHB), and polyhydroxyvalerate (PHV) when growing under a specific nutritional status. The growth of those microorganisms at the pilot or industrial scale offers several advantages compared to that of other microbes that are bioplastic producers. This review summarizes the state of the art of bioplastic production and the most recent findings regarding the production of bioplastics by halophilic microorganisms with special emphasis on haloarchaea. Some protocols to produce/analyze bioplastics are highlighted here to shed light on the potential use of haloarchaea at the industrial scale to produce valuable products, thus minimizing environmental pollution by plastics made from petroleum.
Collapse
|
11
|
Singh S, Sithole B, Lekha P, Permaul K, Govinden R. Optimization of cultivation medium and cyclic fed-batch fermentation strategy for enhanced polyhydroxyalkanoate production by Bacillus thuringiensis using a glucose-rich hydrolyzate. BIORESOUR BIOPROCESS 2021; 8:11. [PMID: 38650248 PMCID: PMC10992944 DOI: 10.1186/s40643-021-00361-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 01/05/2021] [Indexed: 01/22/2023] Open
Abstract
The accumulation of petrochemical plastic waste is detrimental to the environment. Polyhydroxyalkanoates (PHAs) are bacterial-derived polymers utilized for the production of bioplastics. PHA-plastics exhibit mechanical and thermal properties similar to conventional plastics. However, high production cost and obtaining high PHA yield and productivity impedes the widespread use of bioplastics. This study demonstrates the concept of cyclic fed-batch fermentation (CFBF) for enhanced PHA productivity by Bacillus thuringiensis using a glucose-rich hydrolyzate as the sole carbon source. The statistically optimized fermentation conditions used to obtain high cell density biomass (OD600 of 2.4175) were: 8.77 g L-1 yeast extract; 66.63% hydrolyzate (v/v); a fermentation pH of 7.18; and an incubation time of 27.22 h. The CFBF comprised three cycles of 29 h, 52 h, and 65 h, respectively. After the third cyclic event, cell biomass of 20.99 g L-1, PHA concentration of 14.28 g L-1, PHA yield of 68.03%, and PHA productivity of 0.219 g L-1 h-1 was achieved. This cyclic strategy yielded an almost threefold increase in biomass concentration and a fourfold increase in PHA concentration compared with batch fermentation. FTIR spectra of the extracted PHAs display prominent peaks at the wavelengths unique to PHAs. A copolymer was elucidated after the first cyclic event, whereas, after cycles CFBF 2-4, a terpolymer was noted. The PHAs obtained after CFBF cycle 3 have a slightly higher thermal stability compared with commercial PHB. The cyclic events decreased the melting temperature and degree of crystallinity of the PHAs. The approach used in this study demonstrates the possibility of coupling fermentation strategies with hydrolyzate derived from lignocellulosic waste as an alternative feedstock to obtain high cell density biomass and enhanced PHA productivity.
Collapse
Affiliation(s)
- Sarisha Singh
- Discipline of Microbiology, University of KwaZulu-Natal (Westville Campus), Durban, South Africa.
| | - Bruce Sithole
- Biorefinery Industry Development Facility, Chemicals Cluster, Council for Scientific and Industrial Research, Durban, South Africa
- Discipline of Chemical Engineering, University of KwaZulu-Natal, Durban, South Africa
| | - Prabashni Lekha
- Biorefinery Industry Development Facility, Chemicals Cluster, Council for Scientific and Industrial Research, Durban, South Africa
| | - Kugenthiren Permaul
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa
| | - Roshini Govinden
- Discipline of Microbiology, University of KwaZulu-Natal (Westville Campus), Durban, South Africa
| |
Collapse
|
12
|
Dabrowska D, Mozejko-Ciesielska J, Pokój T, Ciesielski S. Transcriptome Changes in Pseudomonas putida KT2440 during Medium-Chain-Length Polyhydroxyalkanoate Synthesis Induced by Nitrogen Limitation. Int J Mol Sci 2020; 22:ijms22010152. [PMID: 33375721 PMCID: PMC7801951 DOI: 10.3390/ijms22010152] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/16/2020] [Accepted: 12/21/2020] [Indexed: 11/16/2022] Open
Abstract
Pseudomonas putida’s versatility and metabolic flexibility make it an ideal biotechnological platform for producing valuable chemicals, such as medium-chain-length polyhydroxyalkanoates (mcl-PHAs), which are considered the next generation bioplastics. This bacterium responds to environmental stimuli by rearranging its metabolism to improve its fitness and increase its chances of survival in harsh environments. Mcl-PHAs play an important role in central metabolism, serving as a reservoir of carbon and energy. Due to the complexity of mcl-PHAs’ metabolism, the manner in which P. putida changes its transcriptome to favor mcl-PHA synthesis in response to environmental stimuli remains unclear. Therefore, our objective was to investigate how the P. putida KT2440 wild type and mutants adjust their transcriptomes to synthesize mcl-PHAs in response to nitrogen limitation when supplied with sodium gluconate as an external carbon source. We found that, under nitrogen limitation, mcl-PHA accumulation is significantly lower in the mutant deficient in the stringent response than in the wild type or the rpoN mutant. Transcriptome analysis revealed that, under N-limiting conditions, 24 genes were downregulated and 21 were upregulated that were common to all three strains. Additionally, potential regulators of these genes were identified: the global anaerobic regulator (Anr, consisting of FnrA, Fnrb, and FnrC), NorR, NasT, the sigma54-dependent transcriptional regulator, and the dual component NtrB/NtrC regulator all appear to play important roles in transcriptome rearrangement under N-limiting conditions. The role of these regulators in mcl-PHA synthesis is discussed.
Collapse
Affiliation(s)
- Dorota Dabrowska
- Department of Environmental Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland; (D.D.); (T.P.)
| | - Justyna Mozejko-Ciesielska
- Department of Microbiology and Mycology, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland;
| | - Tomasz Pokój
- Department of Environmental Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland; (D.D.); (T.P.)
| | - Slawomir Ciesielski
- Department of Environmental Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland; (D.D.); (T.P.)
- Correspondence: ; Tel.: +48-89-5234162
| |
Collapse
|
13
|
Colombo B, Pereira J, Martins M, Torres-Acosta MA, Dias AC, Lemos PC, Ventura SP, Eisele G, Alekseeva A, Adani F, Serafim LS. Recovering PHA from mixed microbial biomass: Using non-ionic surfactants as a pretreatment step. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117521] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
14
|
Müller K, Zollfrank C. Ionic liquid aided solution-precipitation method to prepare polymer blends from cellulose with polyesters or polyamide. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109743] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
15
|
Velázquez-Sánchez C, Espín G, Peña C, Segura D. The Modification of Regulatory Circuits Involved in the Control of Polyhydroxyalkanoates Metabolism to Improve Their Production. Front Bioeng Biotechnol 2020; 8:386. [PMID: 32426348 PMCID: PMC7204398 DOI: 10.3389/fbioe.2020.00386] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 04/07/2020] [Indexed: 11/13/2022] Open
Abstract
Poly-(3-hydroxyalkanoates) (PHAs) are bacterial carbon and energy storage compounds. These polymers are synthesized under conditions of nutritional imbalance, where a nutrient is growth-limiting while there is still enough carbon source in the medium. On the other side, the accumulated polymer is mobilized under conditions of nutrient accessibility or by limitation of the carbon source. Thus, it is well known that the accumulation of PHAs is affected by the availability of nutritional resources and this knowledge has been used to establish culture conditions favoring high productivities. In addition to this effect of the metabolic status on PHAs accumulation, several genetic regulatory networks have been shown to drive PHAs metabolism, so the expression of the PHAs genes is under the influence of global or specific regulators. These regulators are thought to coordinate PHAs synthesis and mobilization with the rest of bacterial physiology. While the metabolic and biochemical knowledge related to the biosynthesis of these polymers has led to the development of processes in bioreactors for high-level production and also to the establishment of strategies for metabolic engineering for the synthesis of modified biopolymers, the use of knowledge related to the regulatory circuits controlling PHAs metabolism for strain improvement is scarce. A better understanding of the genetic control systems involved could serve as the foundation for new strategies for strain modification in order to increase PHAs production or to adjust the chemical structure of these biopolymers. In this review, the regulatory systems involved in the control of PHAs metabolism are examined, with emphasis on those acting at the level of expression of the enzymes involved and their potential modification for strain improvement, both for higher titers, or manipulation of polymer properties. The case of the PHAs producer Azotobacter vinelandii is taken as an example of the complexity and variety of systems controlling the accumulation of these interesting polymers in response to diverse situations, many of which could be engineered to improve PHAs production.
Collapse
Affiliation(s)
- Claudia Velázquez-Sánchez
- Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Guadalupe Espín
- Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Carlos Peña
- Departamento Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Daniel Segura
- Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| |
Collapse
|
16
|
Raza ZA, Tariq MR, Majeed MI, Banat IM. Recent developments in bioreactor scale production of bacterial polyhydroxyalkanoates. Bioprocess Biosyst Eng 2019; 42:901-919. [PMID: 30810810 DOI: 10.1007/s00449-019-02093-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 02/17/2019] [Indexed: 12/21/2022]
Abstract
Polyhydroxyalkanoates (PHAs) are biological plastics that are sustainable alternative to synthetic ones. Numerous microorganisms have been identified as PHAs producers. They store PHAs as cellular inclusions to use as an energy source backup. They can be produced in shake flasks and in bioreactors under defined fermentation and physiological culture conditions using suitable nutrients. Their production at bioreactor scale depends on various factors such as carbon source, nutrients supply, temperature, dissolved oxygen level, pH, and production modes. Once produced, PHAs find diverse applications in multiple fields of science and technology particularly in the medical sector. The present review covers some recent developments in sustainable bioreactor scale production of PHAs and identifies some areas in which future research in this field might be focused.
Collapse
Affiliation(s)
- Zulfiqar Ali Raza
- Department of Applied Sciences, National Textile University, Faisalabad, 37610, Pakistan.
| | - Muhammad Rizwan Tariq
- Department of Applied Sciences, National Textile University, Faisalabad, 37610, Pakistan.,Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | | | - Ibrahim M Banat
- School of Biomedical Sciences, University of Ulster, Coleraine, Northern Ireland, BT52 1SA, UK
| |
Collapse
|
17
|
Polyhydroxyalkanoate synthesis based on glycerol and implementation of the process under conditions of pilot production. Appl Microbiol Biotechnol 2018; 103:225-237. [PMID: 30367183 DOI: 10.1007/s00253-018-9460-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 10/11/2018] [Accepted: 10/12/2018] [Indexed: 10/28/2022]
Abstract
The present study addresses the synthesis and properties of polyhydroxyalkanoates (PHA) of different composition synthesized by Cupriavidus eutrophus B-10646 using glycerol as a carbon substrate. Poly(3-hydroxybutyrate) [P(3HB)] was effectively synthesized in fed-batch culture in a 30-L fermenter on glycerol of various purification degrees, with 99.5, 99.7, and 82.1% content of the main component. Purified glycerol (99.7%) was used for 150-L pilot scale fermentation. The total biomass and P(3HB) concentration reached 110 and 85.8 g/L, respectively, after 45 h of fed-batch fermentation. An average volumetric productivity of P(3HB) was 1.83 g/(L h). The degree of crystallinity and molecular weight of P(3HB) synthesized on glycerol were lower than and temperature characteristics were the same as those of P(3HB) synthesized on sugars.
Collapse
|
18
|
Kamnev AA, Tugarova AV, Dyatlova YA, Tarantilis PA, Grigoryeva OP, Fainleib AM, De Luca S. Methodological effects in Fourier transform infrared (FTIR) spectroscopy: Implications for structural analyses of biomacromolecular samples. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 193:558-564. [PMID: 29310090 DOI: 10.1016/j.saa.2017.12.051] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 12/10/2017] [Accepted: 12/16/2017] [Indexed: 06/07/2023]
Affiliation(s)
- Alexander A Kamnev
- Laboratory of Biochemistry, Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 410049 Saratov, Russia.
| | - Anna V Tugarova
- Laboratory of Biochemistry, Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 410049 Saratov, Russia
| | - Yulia A Dyatlova
- Laboratory of Biochemistry, Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 410049 Saratov, Russia
| | - Petros A Tarantilis
- Laboratory of Chemistry, Department of Food Science and Human Nutrition, School of Food, Biotechnology and Development, Agricultural University of Athens, Athens 11855, Greece
| | - Olga P Grigoryeva
- Department of Chemistry of Heterochain Polymers and Interpenetrating Polymer Networks, Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine, Kyiv 02160, Ukraine
| | - Alexander M Fainleib
- Department of Chemistry of Heterochain Polymers and Interpenetrating Polymer Networks, Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine, Kyiv 02160, Ukraine
| | - Stefania De Luca
- Institute of Biostructures and Bioimaging, National Research Council, 80134 Naples, Italy
| |
Collapse
|
19
|
Chen X, Yin J, Ye J, Zhang H, Che X, Ma Y, Li M, Wu LP, Chen GQ. Engineering Halomonas bluephagenesis TD01 for non-sterile production of poly(3-hydroxybutyrate-co-4-hydroxybutyrate). BIORESOURCE TECHNOLOGY 2017; 244:534-541. [PMID: 28803103 DOI: 10.1016/j.biortech.2017.07.149] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 07/24/2017] [Accepted: 07/25/2017] [Indexed: 06/07/2023]
Abstract
Poly(3-hydroxybutyrate-co-4-hydroxybutyrate), short as P(3HB-co-4HB), was successfully produced by engineered Halomonas bluephagenesis TD01 grown in glucose and γ-butyrolactone under open non-sterile conditions. Gene orfZ encoding 4HB-CoA transferase of Clostridium kluyveri was integrated into the genome to achieve P(3HB-co-4HB) accumulation comparable to that of strains encoding orfZ on plasmids. Fed-batch cultivations conducted in 1-L and 7-L fermentors, respectively, resulted in over 70g/L cell dry weight (CDW) containing 63% P(3HB-co-12mol% 4HB) after 48h under non-sterile conditions. The processes were further scaled up in a 1000-L pilot fermentor to reach 83g/L CDW containing 61% P(3HB-co-16mol% 4HB) in 48h, with a productivity of 1.04g/L/h, again, under non-sterile conditions. The elastic P(3HB-co-16mol% 4HB) shows an elongation at break of 1022±43%. Results demonstrate that the engineered Halomonas bluephagenesis TD01 is a suitable industrial strain for large scale production under open non-sterile conditions.
Collapse
Affiliation(s)
- Xiangbin Chen
- School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Jin Yin
- Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing 100084, China
| | - Jianwen Ye
- School of Life Sciences, Tsinghua University, Beijing 100084, China
| | | | - Xuemei Che
- Center for Nano and Micro-Mechanics, Tsinghua University, Beijing 100084, China
| | - Yiming Ma
- Center for Nano and Micro-Mechanics, Tsinghua University, Beijing 100084, China
| | - Mengyi Li
- Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing 100084, China
| | - Lin-Ping Wu
- Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Guo-Qiang Chen
- School of Life Sciences, Tsinghua University, Beijing 100084, China; Center for Nano and Micro-Mechanics, Tsinghua University, Beijing 100084, China; Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing 100084, China.
| |
Collapse
|
20
|
Silva F, Campanari S, Matteo S, Valentino F, Majone M, Villano M. Impact of nitrogen feeding regulation on polyhydroxyalkanoates production by mixed microbial cultures. N Biotechnol 2017; 37:90-98. [DOI: 10.1016/j.nbt.2016.07.013] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 06/03/2016] [Accepted: 07/21/2016] [Indexed: 10/21/2022]
|
21
|
Volova TG, Vinogradova ON, Zhila NO, Kiselev EG, Peterson IV, Vasil’ev AD, Sukovatyi AG, Shishatskaya EI. Physicochemical properties of multicomponent polyhydroxyalkanoates: Novel aspects. POLYMER SCIENCE SERIES A 2017. [DOI: 10.1134/s0965545x17010163] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
22
|
Volova TG, Vinogradova ON, Zhila NO, Peterson IV, Kiselev EG, Vasiliev AD, Sukovatiy AG, Shishatskaya EI. Properties of a novel quaterpolymer P(3HB/4HB/3HV/3HHx). POLYMER 2016. [DOI: 10.1016/j.polymer.2016.08.048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
23
|
Volova TG, Tarasevich AA, Golubev AI, Boyandin AN, Shumilova AA, Nikolaeva ED, Shishatskaya EI. Laser processing of polymer constructs from poly(3-hydroxybutyrate). JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2015; 26:1210-28. [PMID: 26278920 DOI: 10.1080/09205063.2015.1082810] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
CO2 laser radiation was used to process poly(3-hydroxybutyrate) constructs - films and 3D pressed plates. Laser processing increased the biocompatibility of unperforated films treated with moderate uniform radiation, as estimated by the number and degree of adhesion of NIH 3T3 mouse fibroblast cells. The biocompatibility of perforated films modified in the pulsed mode did not change significantly. At the same time, pulsed laser processing of the 3D plates produced perforated scaffolds with improved mechanical properties and high biocompatibility with bone marrow-derived multipotent, mesenchymal stem cells, which show great promise for bone regeneration.
Collapse
Affiliation(s)
- T G Volova
- a Institute of Biophysics of Siberian Branch of Russian Academy of Sciences , Akademgorodok, Krasnoyarsk 660036 , Russia.,b School of Fundamental Biology and Biotechnology, Siberian Federal University , 79 Svobodnyi Avenue, Krasnoyarsk 660041 , Russia
| | - A A Tarasevich
- c School of Engineering Physics and Radio Electronics, Siberian Federal University , 79 Svobodnyi Avenue, Krasnoyarsk 660041 , Russia
| | - A I Golubev
- d Special Design and Technological Bureau 'Nauka' Krasnoyarsk Scientific Centre of Siberian Branch Russian Academy of Sciences , 53 Mir Avenue, Krasnoyarsk 660049 , Russia
| | - A N Boyandin
- a Institute of Biophysics of Siberian Branch of Russian Academy of Sciences , Akademgorodok, Krasnoyarsk 660036 , Russia.,b School of Fundamental Biology and Biotechnology, Siberian Federal University , 79 Svobodnyi Avenue, Krasnoyarsk 660041 , Russia
| | - A A Shumilova
- a Institute of Biophysics of Siberian Branch of Russian Academy of Sciences , Akademgorodok, Krasnoyarsk 660036 , Russia.,b School of Fundamental Biology and Biotechnology, Siberian Federal University , 79 Svobodnyi Avenue, Krasnoyarsk 660041 , Russia
| | - E D Nikolaeva
- a Institute of Biophysics of Siberian Branch of Russian Academy of Sciences , Akademgorodok, Krasnoyarsk 660036 , Russia.,b School of Fundamental Biology and Biotechnology, Siberian Federal University , 79 Svobodnyi Avenue, Krasnoyarsk 660041 , Russia
| | - E I Shishatskaya
- a Institute of Biophysics of Siberian Branch of Russian Academy of Sciences , Akademgorodok, Krasnoyarsk 660036 , Russia.,b School of Fundamental Biology and Biotechnology, Siberian Federal University , 79 Svobodnyi Avenue, Krasnoyarsk 660041 , Russia
| |
Collapse
|
24
|
Peña C, Castillo T, García A, Millán M, Segura D. Biotechnological strategies to improve production of microbial poly-(3-hydroxybutyrate): a review of recent research work. Microb Biotechnol 2015; 7:278-93. [PMID: 24898500 PMCID: PMC4241722 DOI: 10.1111/1751-7915.12129] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 04/13/2014] [Indexed: 11/27/2022] Open
Abstract
Poly-(3-hydroxybutyrate) [P(3HB)] is a polyester synthesized as a carbon and energy reserve material by a wide number of bacteria. This polymer is characterized by its thermo-plastic properties similar to plastics derived from petrochemical industry, such as polyethylene and polypropylene. Furthermore, P(3HB) is an inert, biocompatible and biodegradable material which has been proposed for several uses in medical and biomedical areas. Currently, only few bacterial species such as Cupriavidus necator, Azohydromonas lata and recombinant Escherichia coli have been successfully used for P(3HB) production at industrial level. Nevertheless, in recent years, several fermentation strategies using other microbial models such as Azotobacter vinelandii, A. chroococcum, as well as some methane-utilizing species, have been developed in order to improve the P(3HB) production and also its mean molecular weight.
Collapse
Affiliation(s)
- C Peña
- Departamento de Ingeniería Celular y Biocatálisis
| | | | | | | | | |
Collapse
|
25
|
A glucose-utilizing strain, Cupriavidus euthrophus B-10646: growth kinetics, characterization and synthesis of multicomponent PHAs. PLoS One 2014; 9:e87551. [PMID: 24586280 PMCID: PMC3933330 DOI: 10.1371/journal.pone.0087551] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 12/22/2013] [Indexed: 12/27/2022] Open
Abstract
This study investigates kinetic and production parameters of a glucose-utilizing bacterial strain, C. eutrophus B-10646, and its ability to synthesize PHA terpolymers. Optimization of a number of parameters of bacterial culture (cell concentration in the inoculum, physiological activity of the inoculum, determined by the initial intracellular polymer content, and glucose concentration in the culture medium during cultivation) provided cell concentrations and PHA yields reaching 110 g/L and 80%, respectively, under two-stage batch culture conditions. Addition of precursor substrates (valerate, hexanoate, propionate, γ-butyrolactone) to the culture medium enabled synthesis of PHA terpolymers, P(3HB/3HV/4HB) and P(3HB/3HV/3HHx), with different composition and different molar fractions of 3HB, 3HV, 4HB, and 3HHx. Different types of PHA terpolymers synthesized by C. eutrophus B-10646 were used to prepare films, whose physicochemical and physical-mechanical properties were investigated. The properties of PHA terpolymers were significantly different from those of the P3HB homopolymer: they had much lower degrees of crystallinity and lower melting points and thermal decomposition temperatures, with the difference between these temperatures remaining practically unchanged. Films prepared from all PHA terpolymers had higher mechanical strength and elasticity than P3HB films. In spite of dissimilar surface structures, all films prepared from PHA terpolymers facilitated attachment and proliferation of mouse fibroblast NIH 3T3 cells more effectively than polystyrene and the highly crystalline P3HB.
Collapse
|