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Haala F, Dielentheis-Frenken MRE, Brandt FM, Karmainski T, Blank LM, Tiso T. DoE-based medium optimization for improved biosurfactant production with Aureobasidium pullulans. Front Bioeng Biotechnol 2024; 12:1379707. [PMID: 38511129 PMCID: PMC10953688 DOI: 10.3389/fbioe.2024.1379707] [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: 01/31/2024] [Accepted: 02/19/2024] [Indexed: 03/22/2024] Open
Abstract
Polyol lipids (a.k.a. liamocins) produced by the polyextremotolerant, yeast-like fungus Aureobasidium pullulans are amphiphilic molecules with high potential to serve as biosurfactants. So far, cultivations of A. pullulans have been performed in media with complex components, which complicates further process optimization due to their undefined composition. In this study, we developed and optimized a minimal medium, focusing on biosurfactant production. Firstly, we replaced yeast extract and peptone in the best-performing polyol lipid production medium to date with a vitamin solution, a trace-element solution, and a nitrogen source. We employed a design of experiments approach with a factor screening using a two-level-factorial design, followed by a central composite design. The polyol lipid titer was increased by 56% to 48 g L-1, and the space-time yield from 0.13 to 0.20 g L-1 h-1 in microtiter plate cultivations. This was followed by a successful transfer to a 1 L bioreactor, reaching a polyol lipid concentration of 41 g L-1. The final minimal medium allows the investigation of alternative carbon sources and the metabolic pathways involved, to pinpoint targets for genetic modifications. The results are discussed in the context of the industrial applicability of this robust and versatile fungus.
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Affiliation(s)
| | | | | | | | | | - Till Tiso
- Institute of Applied Microbiology, RWTH Aachen University, Aachen, Germany
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2
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Podgórska-Kryszczuk I. Biological Control of Aspergillus flavus by the Yeast Aureobasidium pullulans In Vitro and on Tomato Fruit. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12020236. [PMID: 36678949 PMCID: PMC9865452 DOI: 10.3390/plants12020236] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/15/2022] [Accepted: 12/23/2022] [Indexed: 05/14/2023]
Abstract
Aspergillus flavus is an important pathogenic fungus affecting many crops and is one of the main sources of their aflatoxin contamination. The primary method of limiting this pathogen is using chemical fungicides, but researchers focus on searching for other effective agents for its control due to many disadvantages and limitations of these agrochemicals. The results obtained in the present study indicate the high potential of two yeast strains, Aureobasidium pullulans PP4 and A. pullulans ZD1, in the biological control of A. flavus. Under in vitro conditions, mycelial growth was reduced by 53.61% and 63.05%, and spore germination was inhibited by 68.97% and 79.66% by ZD1 and PP4 strains, respectively. Both strains produced the lytic enzymes chitinase and β-1,3-glucanase after 5 days of cultivation with cell wall preparations (CWP) of A. flavus in the medium as a carbon source. In addition, the tested yeasts showed the ability to grow over a wide range of temperatures (4-30 °C), pH (4-11), and salinity (0-12%) and showed tolerance to fungicides at concentrations corresponding to field conditions. Both isolates tested were highly tolerant to cupric oxychloride, showing biomass gains of 85.84% (ZD1) and 87.25% (PP4). Biomass growth in the presence of fungicides azoxystrobin was 78.71% (ZD1) and 82.65% (PP4), while in the presence of difenoconazole, it was 70.09% (ZD1) and 75.25% (PP4). The yeast strains were also tested for antagonistic effects against A. flavus directly on tomato fruit. Both isolates acted effectively by reducing lesion diameter from 29.13 mm (control) to 8.04 mm (PP4) and 8.83 mm (ZD1).
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Affiliation(s)
- Izabela Podgórska-Kryszczuk
- Department of Analysis and Food Quality Assessment, University of Life Sciences in Lublin, Skromna 8, 20-704 Lublin, Poland
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3
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Wan J, Shao Z, Jiang D, Gao H, Yang X. Curdlan production from cassava starch hydrolysates by Agrobacterium sp. DH-2. Bioprocess Biosyst Eng 2022; 45:969-979. [PMID: 35312865 DOI: 10.1007/s00449-022-02718-8] [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: 12/06/2021] [Accepted: 03/07/2022] [Indexed: 11/30/2022]
Abstract
Curdlan is an edible microbial polysaccharide and can be used in food, biomedical and biomaterial fields. To reduce the cost of curdlan production, this study investigated the suitability of cassava starch hydrolysates as carbon source for curdlan production. Cassava starch was hydrolyzed into maltose syrup using β-amylase and pullulanase at various enzyme dosages, temperature, time and addition order of two enzymes. The maltose yield of 53.17% was achieved at starch loading 30% by simultaneous addition β-amylase 210 U/g starch and pullulanase 3 U/g starch at 60 °C for 9 h. Cassava starch hydrolysates were used as carbon source for curdlan production by Agrobacterium sp. DH-2. The curdlan production reached 28.4 g/L with the yield of 0.79 g/g consumed sugar and molecular weight of 1.26 × 106 Da at 96 h with cassava starch hydrolysate at 90 g/L initial sugar concentration. Curdlan produced from cassava starch hydrolysates was characterized using FT-IR spectra and thermo gravimetric analysis. This work indicated that cassava starch was a potential renewable feedstock for curdlan production.
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Affiliation(s)
- Jie Wan
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Zhiyu Shao
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Deming Jiang
- School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Hongliang Gao
- School of Life Sciences, East China Normal University, Shanghai, 200241, China.
| | - Xuexia Yang
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China.
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4
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Purification of xylanases from Aureobasidium pullulans CCT 1261 and its application in the production of xylooligosaccharides. World J Microbiol Biotechnol 2022; 38:52. [DOI: 10.1007/s11274-022-03240-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 01/31/2022] [Indexed: 11/27/2022]
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5
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Singh RS, Saini GK, Kennedy JF. Pullulan production in stirred tank reactor by a colour-variant strain of Aureobasidium pullulans FB-1. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2021. [DOI: 10.1016/j.carpta.2021.100086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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6
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He C, Zhang Z, Zhang Y, Wang G, Wang C, Wang D, Wei G. Efficient pullulan production by Aureobasidium pullulans using cost-effective substrates. Int J Biol Macromol 2021; 186:544-553. [PMID: 34273338 DOI: 10.1016/j.ijbiomac.2021.07.068] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/05/2021] [Accepted: 07/11/2021] [Indexed: 11/30/2022]
Abstract
In this study, cost-effective substrates such as cassava starch, corn steep liquor (CSL) and soybean meal hydrolysate (SMH) were used for pullulan production by Aureobasidium pullulans CCTCC M 2012259. The medium was optimized using response surface methodology (RSM) and artificial neural network (ANN) approaches, and analysis of variance indicated that the ANN model achieved higher prediction accuracy. The optimal medium predicted by ANN was used to produce high molecular weight pullulan in high yield. SMH substrates increased both biomass and pullulan titer, while CSL substrates maintained higher pullulan molecular weight. Results of kinetic parameters, key enzyme activities and intracellular uridine diphosphate glucose contents revealed the physiological mechanism of changes in pullulan titer and molecular weight using different substrates. Economic analysis of batch pullulan production using different substrates was performed, and the cost of nutrimental materials for CSL and SMH substrates was decreased by 46.1% and 49.9%, respectively, compared to the control using glucose and yeast extract as substrates, which could improve the competitiveness of pullulan against other polysaccharides in industrial applications.
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Affiliation(s)
- Chaoyong He
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Zhen Zhang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Youdan Zhang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Guoliang Wang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Chonglong Wang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Dahui Wang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China.
| | - Gongyuan Wei
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China.
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Selvasekaran P, Mahalakshmi, Roshini F, Angalene LA, Chandini, Sunil T, Chidambaram R. Fungal Exopolysaccharides: Production and Biotechnological Industrial Applications in Food and Allied Sectors. Fungal Biol 2021. [DOI: 10.1007/978-3-030-68260-6_12] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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8
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Singh RS, Kaur N, Hassan M, Kennedy JF. Pullulan in biomedical research and development - A review. Int J Biol Macromol 2020; 166:694-706. [PMID: 33137388 DOI: 10.1016/j.ijbiomac.2020.10.227] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 10/28/2020] [Indexed: 12/14/2022]
Abstract
Pullulan is an imperative microbial exo-polymer commercially produced by yeast like fungus Aureobasidium pullulans. Its structure contains maltosyl repeating units which comprises two α-(1 → 4) linked glucopyranose rings attached to one glucopyranose ring through α-(1 → 6) glycosidic bond. The co-existence of α-(1 → 6) and α-(1 → 4) glycosidic linkages endows distinctive physico-chemical properties to pullulan. It is highly biocompatible, non-toxic and non-carcinogenic in nature. It is extremely resistant to any mutagenicity or immunogenicity. The unique properties of pullulan make it a potent candidate for biomedical applications viz. drug delivery, gene delivery, tissue engineering, molecular chaperon, plasma expander, vaccination, etc. This review highlights the potential of pullulan in biomedical research and development.
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Affiliation(s)
- Ram Sarup Singh
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147 002, Punjab, India.
| | - Navpreet Kaur
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147 002, Punjab, India
| | - Muhammad Hassan
- US-Pakistan Center for Advanced Studies in Energy, National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
| | - John F Kennedy
- Chembiotech Laboratories, Advanced Science and Technology Institute, 5 The Croft, Buntsford Drive, Stoke Heath, Bromsgrove, Worcs B60 4JE, UK
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9
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Badhwar P, Kumar A, Yadav A, Kumar P, Siwach R, Chhabra D, Dubey KK. Improved Pullulan Production and Process Optimization Using Novel GA-ANN and GA-ANFIS Hybrid Statistical Tools. Biomolecules 2020; 10:E124. [PMID: 31936881 PMCID: PMC7022329 DOI: 10.3390/biom10010124] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 01/08/2020] [Indexed: 01/30/2023] Open
Abstract
Pullulan production from Aureobasidiumpullulans was explored to increase yield. Non-linear hybrid mathematical tools for optimization of process variables as well as the pullulan yield were analyzed. The one variable at a time (OVAT) approach was used to optimize the maximum pullulan yield of 35.16 ± 0.29 g/L. The tools predicted maximum pullulan yields of 39.4918 g/L (genetic algorithm coupled with artificial neural network (GA-ANN)) and 36.0788 g/L (GA coupled with adaptive network based fuzzy inference system (GA-ANFIS)). The best regression value (0.94799) of the Levenberg-Marquardt (LM) algorithm for ANN and the epoch error (6.1055 × 10-5) for GA-ANFIS point towards prediction precision and potentiality of data training models. The process parameters provided by both the tools corresponding to their predicted yield were revalidated by experiments. Among the two of them GA-ANFIS results were replicated with 98.82% accuracy. Thus GA-ANFIS predicted an optimum pullulan yield of 36.0788 g/L with a substrate concentration of 49.94 g/L, incubation period of 182.39 h, temperature of 27.41 °C, pH of 6.99, and agitation speed of 190.08 rpm.
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Affiliation(s)
- Parul Badhwar
- Microbial Process Development Laboratory, University Institute of Engineering and Technology, Maharishi Dayanand University, Rohtak-124001, Haryana, India; (P.B.); (P.K.); (R.S.)
| | - Ashwani Kumar
- Optimization and Mechatronics Laboratory, Department of Mechanical Engineering, University Institute of Engineering and Technology, Maharishi Dayanand University, Rohtak-124001, Haryana, India; (A.K.)
| | - Ankush Yadav
- Bioprocess Engineering Laboratory, Department of Biotechnology, Central University of Haryana, Mahendergarh-123031, Haryana, India;
| | - Punit Kumar
- Microbial Process Development Laboratory, University Institute of Engineering and Technology, Maharishi Dayanand University, Rohtak-124001, Haryana, India; (P.B.); (P.K.); (R.S.)
| | - Ritu Siwach
- Microbial Process Development Laboratory, University Institute of Engineering and Technology, Maharishi Dayanand University, Rohtak-124001, Haryana, India; (P.B.); (P.K.); (R.S.)
| | - Deepak Chhabra
- Optimization and Mechatronics Laboratory, Department of Mechanical Engineering, University Institute of Engineering and Technology, Maharishi Dayanand University, Rohtak-124001, Haryana, India; (A.K.)
| | - Kashyap Kumar Dubey
- Bioprocess Engineering Laboratory, Department of Biotechnology, Central University of Haryana, Mahendergarh-123031, Haryana, India;
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10
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Wang D, Zhu C, Zhang G, Wang C, Wei G. Enhanced β-glucan and pullulan production by Aureobasidium pullulans with zinc sulfate supplementation. Appl Microbiol Biotechnol 2019; 104:1751-1760. [PMID: 31867695 DOI: 10.1007/s00253-019-10326-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 12/10/2019] [Accepted: 12/15/2019] [Indexed: 01/20/2023]
Abstract
The effects of mineral salts on the production of exopolysaccharides, including β-glucan and pullulan, by Aureobasidium pullulans CCTCC M 2012259 were investigated. Zinc sulfate at certain concentrations decreased dry biomass but favored to the biosynthesis of both exopolysaccharides. When 100 mg/L zinc sulfate was added to the fermentation medium, production of β-glucan and pullulan increased by 141.7 and 10.2%, respectively, when compared with that noted in the control without zinc sulfate addition. To reveal the physiological mechanism underlying improved β-glucan and pullulan production, key enzymes activities, energy metabolism substances, intracellular uridine diphosphate glucose (UDPG) levels, and gene expression were determined. The results indicated that zinc sulfate up-regulated the transcriptional levels of pgm1, ugp, fks, and kre6 genes, increased activities of key enzymes involved in the biosynthesis of UDPG, β-glucan and pullulan, enhanced intracellular UDPG content, and improved energy supply, all of which contributed to the increment in β-glucan and pullulan production. The present study not only provides a feasible approach to improve the production of exopolysaccharides but also contributes to better understanding of the physiological characteristics of A. pullulans.
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Affiliation(s)
- D Wang
- School of Biology and Basic Medical Sciences, Soochow University, 199# Ren'ai Road, Suzhou, 215123, People's Republic of China
| | - C Zhu
- School of Biology and Basic Medical Sciences, Soochow University, 199# Ren'ai Road, Suzhou, 215123, People's Republic of China
| | - G Zhang
- School of Biology and Basic Medical Sciences, Soochow University, 199# Ren'ai Road, Suzhou, 215123, People's Republic of China
| | - C Wang
- School of Biology and Basic Medical Sciences, Soochow University, 199# Ren'ai Road, Suzhou, 215123, People's Republic of China
| | - G Wei
- School of Biology and Basic Medical Sciences, Soochow University, 199# Ren'ai Road, Suzhou, 215123, People's Republic of China.
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11
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Saur KM, Brumhard O, Scholz K, Hayen H, Tiso T. A pH shift induces high-titer liamocin production in Aureobasidium pullulans. Appl Microbiol Biotechnol 2019; 103:4741-4752. [DOI: 10.1007/s00253-019-09677-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 01/22/2019] [Accepted: 01/31/2019] [Indexed: 10/27/2022]
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12
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An C, Ma SJ, Xue WJ, Liu C, Ding H. Comparative study of different molecular weight pullulan productions by Aureobasidium pullulans CGMCC No.11602. 3 Biotech 2019; 9:156. [PMID: 30944803 PMCID: PMC6439089 DOI: 10.1007/s13205-019-1680-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Accepted: 03/14/2019] [Indexed: 01/10/2023] Open
Abstract
Pullulan productions by Aureobasidium pullulans CGMCC No.11602 were conducted using the initial culture (IC) medium and the optimized culture (OC) medium, respectively, in which pullulan with significantly different molecular weights was obtained. Under the IC medium condition, the pullulan molecular weight (M w) reached 288,403 Da with a yield of 64.12 g/L after 96 h fermentation period. However, the pullulan molecular weight was much higher (M w, 3,715,352 Da), while the yield of pullulan was lower (40.12 g/L) using the OC medium. The FTIR spectra indicated that pullulan produced using the IC and OC medium were similar. Transcriptome analysis showed that a total of 871 differentially expressed genes (DEGs) were screened and "N-glycan biosynthesis" and "other types of O-glycan biosynthesis" were the most highly represented differential metabolic pathways (DMPs). Specifically, the genes involved in the two DMPs consistently pointed to glucosyltransferase genes (GTF), all of which were up-regulated in the OC medium when compared with those in the IC medium. Further studies showed that the activity and the relative quantity (RQ) of GTF transcription were remarkable higher, which were coincident with the slower decrease in the molecular weight of pullulan in the OC medium than those in the IC medium during the late stage of fermentation. The results indicated that GTF may be involved in the regulation of pullulan molecular weight.
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Affiliation(s)
- Chao An
- Shaanxi Provincial Institute of Microbiology, No. 76 Xiying Rd, Xi’an, 710043 Shaanxi Province People’s Republic of China
- Engineering Center of QinLing Mountains Natural Products, Shaanxi Academy of Sciences, Xi’an, 710043 People’s Republic of China
| | - Sai-jian Ma
- Shaanxi Provincial Institute of Microbiology, No. 76 Xiying Rd, Xi’an, 710043 Shaanxi Province People’s Republic of China
- Engineering Center of QinLing Mountains Natural Products, Shaanxi Academy of Sciences, Xi’an, 710043 People’s Republic of China
| | - Wen-jiao Xue
- Shaanxi Provincial Institute of Microbiology, No. 76 Xiying Rd, Xi’an, 710043 Shaanxi Province People’s Republic of China
- Engineering Center of QinLing Mountains Natural Products, Shaanxi Academy of Sciences, Xi’an, 710043 People’s Republic of China
| | - Chen Liu
- Shaanxi Provincial Institute of Microbiology, No. 76 Xiying Rd, Xi’an, 710043 Shaanxi Province People’s Republic of China
- Engineering Center of QinLing Mountains Natural Products, Shaanxi Academy of Sciences, Xi’an, 710043 People’s Republic of China
| | - Hao Ding
- Shaanxi Provincial Institute of Microbiology, No. 76 Xiying Rd, Xi’an, 710043 Shaanxi Province People’s Republic of China
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13
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Wang DH, Ni TF, Ju XM, Wei GY. Sodium chloride improves pullulan production by Aureobasidium pullulans but reduces the molecular weight of pullulan. Appl Microbiol Biotechnol 2018; 102:8921-8930. [DOI: 10.1007/s00253-018-9292-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/27/2018] [Accepted: 08/01/2018] [Indexed: 10/28/2022]
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14
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K.R. S, V. P. Review on production, downstream processing and characterization of microbial pullulan. Carbohydr Polym 2017; 173:573-591. [DOI: 10.1016/j.carbpol.2017.06.022] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 05/20/2017] [Accepted: 06/05/2017] [Indexed: 10/19/2022]
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15
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Terán Hilares R, Orsi CA, Ahmed MA, Marcelino PF, Menegatti CR, da Silva SS, Dos Santos JC. Low-melanin containing pullulan production from sugarcane bagasse hydrolysate by Aureobasidium pullulans in fermentations assisted by light-emitting diode. BIORESOURCE TECHNOLOGY 2017; 230:76-81. [PMID: 28161623 DOI: 10.1016/j.biortech.2017.01.052] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 01/25/2017] [Accepted: 01/27/2017] [Indexed: 06/06/2023]
Abstract
Pullulan is a polymer produced by Aureobasidium pullulans and the main bottleneck for its industrial production is the presence of melanin pigment. In this study, light-emitting diodes (LEDs) of different wavelengths were used to assist the fermentation process aiming to produce low-melanin containing pullulan by wild strain of A. pullulans LB83 with different carbon sources. Under white light using glucose-based medium, 11.75g.L-1 of pullulan with high melanin content (45.70UA540nm.g-1) was obtained, this production improved in process assisted by blue LED light, that resulted in 15.77g.L-1 of pullulan with reduced content of melanin (4.46UA540nm.g-1). By using sugarcane bagasse (SCB) hydrolysate as carbon source, similar concentration of pullulan (about 20g.L-1) was achieved using white and blue LED lights, with lower melanin contents in last. Use of LED light was found as a promising approach to assist biotechnological process for low-melanin containing pullulan production.
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Affiliation(s)
- Ruly Terán Hilares
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, CEP 12602-810, Brazil.
| | - Camila Ayres Orsi
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, CEP 12602-810, Brazil
| | - Muhammad Ajaz Ahmed
- Department of Civil and Environmental Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Paulo Franco Marcelino
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, CEP 12602-810, Brazil
| | - Carlos Renato Menegatti
- Department of Basic and Environmental Sciences, Engineering School of Lorena, University of São Paulo, CEP 12602-810, Brazil
| | - Silvio Silvério da Silva
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, CEP 12602-810, Brazil
| | - Júlio César Dos Santos
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, CEP 12602-810, Brazil
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16
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Chen CT, Chen KI, Chiang HH, Chen YK, Cheng KC. Improvement on Physical Properties of Pullulan Films by Novel Cross-Linking Strategy. J Food Sci 2016; 82:108-117. [DOI: 10.1111/1750-3841.13577] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 11/08/2016] [Accepted: 11/09/2016] [Indexed: 12/01/2022]
Affiliation(s)
- Chieh-Ting Chen
- Graduate Inst. of Food Science Technology; Natl. Taiwan Univ; Taipei 10617 Taiwan
| | - Kuan-I Chen
- Graduate Inst. of Food Science Technology; Natl. Taiwan Univ; Taipei 10617 Taiwan
- Inst. of Biotechnology; Natl. Taiwan Univ; Taipei 10617 Taiwan
| | - Hsin-Han Chiang
- Dept. of Electrical Engineering; Fu Jen Catholic Univ; New Taipei City 24205 Taiwan
| | - Yu-Kuo Chen
- Dept. of Food Science; Natl. Pingtung Univ. of Science and Technology; Pingtung 91207 Taiwan
| | - Kuan-Chen Cheng
- Graduate Inst. of Food Science Technology; Natl. Taiwan Univ; Taipei 10617 Taiwan
- Inst. of Biotechnology; Natl. Taiwan Univ; Taipei 10617 Taiwan
- Dept. of Medical Research; China Medical Univ. Hospital, China Medical Univ; 91, Hsueh-Shih Road Taichung 40402 Taiwan
- Dept. of Food Science; Rutgers Univ; New Brunswick N.J. 08901 U.S.A
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17
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Wang D, Ju X, Zhang G, Wang D, Wei G. Copper sulfate improves pullulan production by bioconversion using whole cells of Aureobasidium pullulans as the catalyst. Carbohydr Polym 2016; 150:209-15. [DOI: 10.1016/j.carbpol.2016.05.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 04/25/2016] [Accepted: 05/11/2016] [Indexed: 11/16/2022]
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18
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Sheng L, Tong Q, Ma M. Why sucrose is the most suitable substrate for pullulan fermentation by Aureobasidium pullulans CGMCC1234? Enzyme Microb Technol 2016; 92:49-55. [PMID: 27542744 DOI: 10.1016/j.enzmictec.2016.06.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 06/23/2016] [Accepted: 06/24/2016] [Indexed: 10/21/2022]
Abstract
This paper studies the metabolic pathway of sucrose in pullulan fermentation by Aureobasidium pullulans. Because of its high pullulan production, sucrose proved to be the best carbon source for pullulan synthesis by A. pullulans CGMCC1234 (36.3g/L). Compared to other carbon sources, A. pullulans cells reached the stationary phase more quickly in the presence of sucrose. The specific sugar types and concentrations occurring during pullulan fermentation were detected using High Performance Liquid Chromatography (HPLC). HPLC results revealed that sucrose did not simply break down into glucose and fructose in the medium employed. Kestose (22.69g/L) also accumulated during early stages of fermentation (24h), which reduced the osmotic pressure of the extracellular fluid and diminished the inhibition of cell growth and pullulan production. β-Fructofuranosidase activity strongly depended on the carbon source. Sucrose was the best inducer of β-fructofuranosidase production. However, β-fructofuranosidase production did not directly and/or proportionally correlate with the growth of A. pullulans cells.
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Affiliation(s)
- Long Sheng
- National R&D Center for Egg Processing, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Qunyi Tong
- The State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Meihu Ma
- National R&D Center for Egg Processing, College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
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Hara KY, Kondo A. ATP regulation in bioproduction. Microb Cell Fact 2015; 14:198. [PMID: 26655598 PMCID: PMC4676173 DOI: 10.1186/s12934-015-0390-6] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 11/25/2015] [Indexed: 01/06/2023] Open
Abstract
Adenosine-5'-triphosphate (ATP) is consumed as a biological energy source by many intracellular reactions. Thus, the intracellular ATP supply is required to maintain cellular homeostasis. The dependence on the intracellular ATP supply is a critical factor in bioproduction by cell factories. Recent studies have shown that changing the ATP supply is critical for improving product yields. In this review, we summarize the recent challenges faced by researchers engaged in the development of engineered cell factories, including the maintenance of a large ATP supply and the production of cell factories. The strategies used to enhance ATP supply are categorized as follows: addition of energy substrates, controlling pH, metabolic engineering of ATP-generating or ATP-consuming pathways, and controlling reactions of the respiratory chain. An enhanced ATP supply generated using these strategies improves target production through increases in resource uptake, cell growth, biosynthesis, export of products, and tolerance to toxic compounds.
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Affiliation(s)
- Kiyotaka Y Hara
- Department of Environmental Sciences, Graduate School of Nutritional and Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan.
| | - Akihiko Kondo
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe, 657-8501, Japan.
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Wang D, Chen F, Wei G, Jiang M, Dong M. The mechanism of improved pullulan production by nitrogen limitation in batch culture of Aureobasidium pullulans. Carbohydr Polym 2015; 127:325-31. [PMID: 25965490 DOI: 10.1016/j.carbpol.2015.03.079] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 03/25/2015] [Accepted: 03/27/2015] [Indexed: 11/17/2022]
Abstract
Batch culture of Aureobasidium pullulans CCTCC M 2012259 for pullulan production at different concentrations of ammonium sulfate and yeast extract was investigated. Increased pullulan production was obtained under nitrogen-limiting conditions, as compared to that without nitrogen limitation. The mechanism of nitrogen limitation favoring to pullulan overproduction was revealed by determining the activity as well as gene expression of key enzymes, and energy supply for pullulan biosynthesis. Results indicated that nitrogen limitation increased the activities of α-phosphoglucose mutase and glucosyltransferase, up-regulated the transcriptional levels of pgm1 and fks genes, and supplied more ATP intracellularly, which were propitious to further pullulan biosynthesis. The economic analysis of batch pullulan production indicated that nitrogen limitation could reduce more than one third of the cost of raw materials when glucose was supplemented to a total concentration of 70 g/L. This study also helps to understand the mechanism of other polysaccharide overproduction by nitrogen limitation.
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Affiliation(s)
- Dahui Wang
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China; School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Feifei Chen
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Gongyuan Wei
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Min Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China
| | - Mingsheng Dong
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China.
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Production of Pullulan by Microbial Fermentation. POLYSACCHARIDES 2015. [DOI: 10.1007/978-3-319-16298-0_58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Ju XM, Wang DH, Zhang GC, Cao D, Wei GY. Efficient pullulan production by bioconversion using Aureobasidium pullulans as the whole-cell catalyst. Appl Microbiol Biotechnol 2014; 99:211-20. [DOI: 10.1007/s00253-014-6100-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Revised: 09/11/2014] [Accepted: 09/13/2014] [Indexed: 11/29/2022]
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Wang D, Ju X, Zhou D, Wei G. Efficient production of pullulan using rice hull hydrolysate by adaptive laboratory evolution of Aureobasidium pullulans. BIORESOURCE TECHNOLOGY 2014; 164:12-9. [PMID: 24835913 DOI: 10.1016/j.biortech.2014.04.036] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Revised: 04/09/2014] [Accepted: 04/10/2014] [Indexed: 05/09/2023]
Abstract
Pullulan production by Aureobasidium pullulans CCTCC M 2012259 using rice hull hydrolysate as the carbon source was conducted. The acetic acid in the hydrolysate was demonstrated to exert a negative effect on pullulan biosynthesis. Instead of employing expensive methods to remove acetic acid from the hydrolysate, a mutant A. pullulans ARH-1 was isolated following 20 cycles of adaptive laboratory evolution of the parental strain on medium containing acetic acid. The maximum pullulan production achieved by the adapted mutant at 48 h using the hydrolysate of untreated rice hull was 22.2 g L(-1), while that obtained by the parental strain at 60 h was 15.6 g L(-1). The assay of key enzymes associated with pullulan biosynthesis revealed that acetic acid inhibited enzyme activity rather than suppressing enzyme synthesis. These results demonstrated that adaptive evolution highly improved the efficiency of pullulan production by A. pullulans using the hydrolysate of untreated rice hull.
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Affiliation(s)
- Dahui Wang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Xiaomin Ju
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Donghai Zhou
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Gongyuan Wei
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China; State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China.
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Ponnusami V, Gunasekar V. Production of Pullulan by Microbial Fermentation. POLYSACCHARIDES 2014. [DOI: 10.1007/978-3-319-03751-6_58-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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