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Romero Soto L, Thabet H, Maghembe R, Gameiro D, Van-Thuoc D, Dishisha T, Hatti-Kaul R. Metabolic potential of the moderate halophile Yangia sp. ND199 for co-production of polyhydroxyalkanoates and exopolysaccharides. Microbiologyopen 2021; 10:e1160. [PMID: 33650793 PMCID: PMC7892980 DOI: 10.1002/mbo3.1160] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/20/2020] [Accepted: 12/22/2020] [Indexed: 12/02/2022] Open
Abstract
Yangia sp. ND199 is a moderately halophilic bacterium isolated from mangrove samples in Northern Vietnam, which was earlier reported to grow on several sugars and glycerol to accumulate poly(hydroxyalkanoates) (PHA). In this study, the potential of the bacterium for co‐production of exopolysaccharides (EPS) and PHA was investigated. Genome sequence analysis of the closely related Yangia sp. CCB‐M3 isolated from mangroves in Malaysia revealed genes encoding enzymes participating in different EPS biosynthetic pathways. The effects of various cultivation parameters on the production of EPS and PHA were studied. The highest level of EPS (288 mg/L) was achieved using sucrose and yeast extract with 5% NaCl and 120 mM phosphate salts but with modest PHA accumulation (32% of cell dry weight, 1.3 g/L). Growth on fructose yielded the highest PHA concentration (85% of CDW, 3.3 g/L) at 90 mM phosphate and higher molecular weight EPS at 251 mg/L yield at 120 mM phosphate concentration. Analysis of EPS showed a predominance of glucose, followed by fructose and galactose, and minor amounts of acidic sugars.
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Affiliation(s)
- Luis Romero Soto
- Division of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Lund, Sweden.,Instituto de Investigación y Desarrollo de Procesos Químicos, Universidad Mayor de San Andrés, La Paz, Bolivia
| | - Habib Thabet
- Division of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Lund, Sweden.,Food Science and Technology Department, Ibb University, Ibb, Yemen
| | - Reuben Maghembe
- Division of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Lund, Sweden.,Department of Molecular Biology and Biotechnology, College of Natural and Applied Sciences, University of Dar es Salaam, Dar es Salaam, Tanzania
| | - Denise Gameiro
- Division of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Lund, Sweden
| | - Doan Van-Thuoc
- Department of Biotechnology and Microbiology, Faculty of Biology, Hanoi National University of Education, Hanoi, Vietnam
| | - Tarek Dishisha
- Department of Pharmaceutical Microbiology and Immunology, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
| | - Rajni Hatti-Kaul
- Division of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Lund, Sweden
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Rivera-Terceros P, Tito-Claros E, Torrico S, Carballo S, Van-Thuoc D, Quillaguamán J. Production of poly(3-hydroxybutyrate) by Halomonas boliviensis in an air-lift reactor. ACTA ACUST UNITED AC 2015; 22:8. [PMID: 26236692 PMCID: PMC4522284 DOI: 10.1186/s40709-015-0031-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 07/15/2015] [Indexed: 11/10/2022]
Abstract
Background Microbial polyesters, also known as polyhydroxyalkanoates (PHAs), closely resemble physical and mechanical features of petroleum derived plastics. Recombinant Escherichia coli strains are being used in industrial production of PHAs in Stirred Tank Bioreactors (STRs). However, use of Air-Lift Reactors (ALRs) has been known to offer numerous technical operating options over STRs, and as such has been successfully implemented in many bioprocesses. Halomonas boliviensis is a halophilic bacterium that is known to assimilate various carbohydrates and convert them into a particular type of PHA known as poly(3-hydroxybutyrate) (PHB). Owing to this capability, it has been used to synthesize the polyester using hydrolysates of starch or wheat bran in stirred tank bioreactors. Results This research article firstly describes the production of PHB in shake flasks by H. boliviensis using different combinations of carbohydrates and partially hydrolyzed starch as carbon sources. The highest PHB yields, between 56 and 61 % (wt.), were achieved when either starch hydrolysate or a mixture of glucose and xylose were used as carbon sources. The starch hydrolysate obtained in this study was then used as carbon source in an ALR. The largest amount of PHB, 41 % (wt.), was attained after 24 hrs of cultivation during which maltose in the hydrolysate was assimilated more rapidly than glucose during active cell growth; however, the rate of assimilation of both the carbohydrates was found to be similar during synthesis of PHB. An incomplete pentose phosphate pathway, which lacks 6-phosphogluconate dehydrogenase, was deduced from the genome sequence of this bacterium and may result in the characteristic assimilation of glucose and maltose by the cells. Conclusions This study showed that the production of PHB by H. boliviensis using cheap substrates such as starch hydrolysate in a simple production system involving an ALR is feasible. Both maltose and glucose in the hydrolysate induce cell growth and PHB synthesis; most likely the cells balance adequately CoA and NAD(P)H during the assimilation of these carbohydrates. The combination of cheap substrates, simple production systems and the use of non-strict sterile conditions by the halophile H. boliviensis are desirable traits for large scale production of PHB, and should lead to a competitive bioprocess. Electronic supplementary material The online version of this article (doi:10.1186/s40709-015-0031-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Paola Rivera-Terceros
- Center of Biotechnology, Faculty of Sciences and Technology, San Simon University, Cochabamba, Bolivia
| | - Estefanía Tito-Claros
- Center of Biotechnology, Faculty of Sciences and Technology, San Simon University, Cochabamba, Bolivia
| | - Sonia Torrico
- Center of Agroindustrial Technology, Faculty of Sciences and Technology, San Simon University, Cochabamba, Bolivia
| | - Sergio Carballo
- Center of Food and Natural Products, Faculty of Sciences and Technology, San Simon University, Cochabamba, Bolivia
| | - Doan Van-Thuoc
- Department of Microbiology and Biotechnology, Faculty of Biology, Hanoi National University of Education, 136 XuanThuy, CauGiay, Hanoi, Vietnam
| | - Jorge Quillaguamán
- Center of Biotechnology, Faculty of Sciences and Technology, San Simon University, Cochabamba, Bolivia
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Van-Thuoc D, Huu-Phong T, Minh-Khuong D, Hatti-Kaul R. Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate) Production by a Moderate Halophile Yangia sp. ND199 Using Glycerol as a Carbon Source. Appl Biochem Biotechnol 2015; 175:3120-32. [DOI: 10.1007/s12010-015-1479-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Accepted: 01/01/2015] [Indexed: 11/24/2022]
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Van-Thuoc D, Huu-Phong T, Thi-Binh N, Thi-Tho N, Minh-Lam D, Quillaguamán J. Polyester production by halophilic and halotolerant bacterial strains obtained from mangrove soil samples located in Northern Vietnam. Microbiologyopen 2012; 1:395-406. [PMID: 23233461 PMCID: PMC3535385 DOI: 10.1002/mbo3.44] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 09/14/2012] [Accepted: 09/17/2012] [Indexed: 11/24/2022] Open
Abstract
This research article reports halophilic and halotolerant bacteria isolated from mangrove forests located in Northern Vietnam. Several of these bacteria were able to synthesize polyhydroxyalkanoates (PHAs). PHAs are polyesters stored by microorganisms under the presence of considerable amounts of a carbon source and deficiency of other essential nutrient such as nitrogen or phosphorous. Mangrove forests in Northern Vietnam are saline coastal habitats that have not been microbiologically studied. Mangrove ecosystems are, in general, rich in organic matter, but deficient in nutrients such as nitrogen and phosphorus. We have found about 100 microorganisms that have adapted to mangrove forests by accumulating PHAs. The production of polyesters might therefore be an integral part of the carbon cycle in mangrove forests. Three of the strains (ND153, ND97, and QN194) isolated from the Vietnamese forests were identified as Bacillus species, while other five strains (QN187, ND199, ND218, ND240, and QN271) were phylogenetically close related to the α-proteobacterium Yangia pacifica. These strains were found to accumulate PHAs in noticeable amounts. Polymer inclusions and chemical structure were studied by transmission electron microscopy and proton nuclear magnetic resonance (NMR) spectroscopy analyses, respectively. Strains ND153, ND97, QN194, QN187, ND240, and QN271 synthesized poly(3-hydroxybutyrate) (PHB) from glucose, whereas strains ND199 and ND218 synthesized poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) from this carbohydrate. With the exception of strain QN194, the strains accumulated PHBV when a combination of glucose and propionate was included in the culture medium. The polymer yields and cell growth reached by one Bacillus isolate, strain ND153, and one Gram-negative bacterium, strain QN271, were high and worth to be researched further. For experiments performed in shake flasks, strain ND153 reached a maximum PHBV yield of 71 wt% and a cell dry weight (CDW) of 3.6 g/L while strain QN271 attained a maximum PHB yield of 48 wt% and a CDW of 5.1 g/L. Both strain ND153 and strain QN271 may only represent a case in point that exemplifies of the potential that mangrove forests possess for the discovery of novel halophilic and halotolerant microorganisms able to synthesize different types of biopolyesters.
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Affiliation(s)
- Doan Van-Thuoc
- Department of Microbiology and Biotechnology, Faculty of Biology, Hanoi National University of Education136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
| | - Tran Huu-Phong
- Department of Microbiology and Biotechnology, Faculty of Biology, Hanoi National University of Education136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
| | - Nguyen Thi-Binh
- Department of Microbiology and Biotechnology, Faculty of Biology, Hanoi National University of Education136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
| | - Nguyen Thi-Tho
- Department of Microbiology and Biotechnology, Faculty of Biology, Hanoi National University of Education136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
| | - Duong Minh-Lam
- Department of Microbiology and Biotechnology, Faculty of Biology, Hanoi National University of Education136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
| | - Jorge Quillaguamán
- Center of Biotechnology, Faculty of Sciences and Technology, Universidad Mayor de San SimónCochabamba, Bolivia
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Van-Thuoc D, Hashim SO, Hatti-Kaul R, Mamo G. Ectoine-mediated protection of enzyme from the effect of pH and temperature stress: a study using Bacillus halodurans xylanase as a model. Appl Microbiol Biotechnol 2012; 97:6271-8. [DOI: 10.1007/s00253-012-4528-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 10/05/2012] [Accepted: 10/18/2012] [Indexed: 10/27/2022]
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Van-Thuoc D, Guzmán H, Thi-Hang M, Hatti-Kaul R. Ectoine production by Halomonas boliviensis: optimization using response surface methodology. Mar Biotechnol (NY) 2010; 12:586-593. [PMID: 19957094 DOI: 10.1007/s10126-009-9246-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Accepted: 10/23/2009] [Indexed: 05/28/2023]
Abstract
Two cultivation steps were used for production of biomass and ectoine by Halomonas boliviensis, respectively. The optimization of some nutrient parameters in each step was investigated by using response surface methodology. Twenty and 12 experiments were performed to attain optimal conditions for biomass and ectoine production, respectively. The model predicted a maximum biomass concentration of 3.34 g/L on optimization of NH(4)Cl, K(2)HPO(4), and MgSO(4)•7H(2)O concentrations during the first cultivation, while a maximum ectoine concentration of 1.27 g/L was predicted on optimizing NaCl and monosodium glutamate concentrations in the second cultivation. The experimental values obtained (3.36 g biomass/L and 1.25 g ectoine/L) were in good agreement with the predicted values. The optimized conditions were also used for two-step 1.5-L fed-batch fermentations. In the first step, biomass concentration of 28.7 g/L was obtained while in the second step biomass concentration increased to 63 g/L. Ectoine concentration of 9.2 g/L was obtained, and the overall ectoine productivity was 6.3 g/L/day, being among the highest reported so far.
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Affiliation(s)
- Doan Van-Thuoc
- Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, 221 00, Lund, Sweden.
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Van-Thuoc D, Guzmán H, Quillaguamán J, Hatti-Kaul R. High productivity of ectoines by Halomonas boliviensis using a combined two-step fed-batch culture and milking process. J Biotechnol 2010; 147:46-51. [DOI: 10.1016/j.jbiotec.2010.03.003] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Revised: 02/25/2010] [Accepted: 03/02/2010] [Indexed: 11/24/2022]
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Van-Thuoc D, Quillaguamán J, Mamo G, Mattiasson B. Utilization of agricultural residues for poly(3-hydroxybutyrate) production by Halomonas boliviensis LC1. J Appl Microbiol 2007; 104:420-8. [PMID: 17887984 DOI: 10.1111/j.1365-2672.2007.03553.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AIMS Utilization of cheap and readily available agricultural residues as cheap carbon sources for poly(3-hydroxybutyrate) (PHB) production by Halomonas boliviensis. METHODS AND RESULTS Wheat bran was hydrolysed by a crude enzyme preparation from Aspergillus oryzae NM1 to provide a mixture of reducing sugars composed mainly of glucose, mannose, xylose and arabinose. Growth of H. boliviensis using a mixture of glucose (0.75% w/v) and xylose (0.25% w/v) in the medium led to a PHB content and concentration of 45 wt% and 1 g l(-1), respectively, after 30 h. A similar PHB concentration was attained when H. boliviensis was grown on wheat bran hydrolysate but with a lower PHB content, 34 wt%. In a batch cultivation mode in a fermentor, using 1.8% (w/v) reducing sugars, the maximum PHB accumulation by H. boliviensis was attained in 20 h, but was reduced to about 30 wt%. By adding butyric acid (0.8% v/v), sodium acetate (0.8% w/v) and decreasing the reducing sugars concentration to 1 x 0% w/v in the medium, PHB accumulation and concentration were increased to 50 wt% and 4 g l(-1), respectively, after 20 h. Butyric acid and sodium acetate for PHB production could also be provided by anaerobic digestion of solid potato waste. CONCLUSIONS Cheap and readily available agricultural residues can be used as substrates to produce PHB. The production of PHB by H. boliviensis using wheat bran hydrolysate as source of carbon is expected to reduce the production cost and motivates further studies. SIGNIFICANCE AND IMPACT OF THE STUDY Large-scale commercial utilization of PHB is mainly hampered by its high production cost. Carbon source for PHB production accounts up to 50% of the total production costs. Thus, the use of waste agricultural residues can substantially reduce the substrate cost (and in turn even provide value to the waste), and can downsize the production costs. This improves the market competitiveness. Studies on PHB production by moderate halophiles were recently initiated with H. boliviensis and findings show that it has potential for commercial exploitation. PHB production by H. boliviensis using wheat bran and potato waste is hence interesting.
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Affiliation(s)
- D Van-Thuoc
- Department of Biotechnology, Centre for Chemistry and Chemical Engineering, Lund University, Lund, Sweden
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