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Kankonkar HT, Khandeparker RS. Halotolerant Bacteria from Genus Nesterenkonia sandarakina VSA9 as a Potential Polyhydroxyalkanoate Producer. Curr Microbiol 2024; 81:53. [PMID: 38172411 DOI: 10.1007/s00284-023-03569-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 11/20/2023] [Indexed: 01/05/2024]
Abstract
Nesterenkonia sandarakina VSA9 pigmented bacteria isolated from Sargassum is being reported to produce polyhydroxyalkanoates (PHA) deduced through detecting the presence of pha C gene using the molecular method. The PHA synthase gene was of type I which has been concluded from the phylogenetic tree and multiple sequence analysis. The amino acid analysis of pha C gene confirms the involvement of the lipase box having a sequence of G-Y-C-I-G-G with cysteine as the active center of the PHA synthase. Homology modeling predicted the 3D protein structure which is similar to the PHA synthase of Chromobacterium sp. USM2. The solvent extract of N. sandarakina VSA9 showed the presence of Carotenoid compound with maximum wavelength at 475 nm. The study's findings could have far-reaching implications, contributing to advancements in the biotechnology, industrial processes, and sustainable practices. The simultaneous production of carotenoids and PHAs by N. sandarakina VSA9 presents exciting opportunities for the development of innovative and environmentally friendly applications.
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Affiliation(s)
- Harshada T Kankonkar
- Microbial Ecology Laboratory, Biological Oceanography Division, CSIR-National Institute of Oceanography, Raj Bhavan Road, Dona Paula, Goa, 403004, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Rakhee S Khandeparker
- Microbial Ecology Laboratory, Biological Oceanography Division, CSIR-National Institute of Oceanography, Raj Bhavan Road, Dona Paula, Goa, 403004, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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Tůma S, Izaguirre J, Bondar M, Marques M, Fernandes P, da Fonseca M, Cesário M. Upgrading end-of-line residues of the red seaweed Gelidium sesquipedale to polyhydroxyalkanoates using Halomonas boliviensis. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2020; 27:e00491. [PMID: 32612942 PMCID: PMC7317225 DOI: 10.1016/j.btre.2020.e00491] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/10/2020] [Accepted: 06/15/2020] [Indexed: 11/25/2022]
Abstract
Agar extraction from Gelidium and Gracilaria red seaweed species produces hundred thousand ton of carbohydrate-rich residues annually. Gelidium sesquipedale waste biomass obtained after agar extraction, still contained 44.2 % w/w total carbohydrates (dry-weight basis). These residues were biologically up-graded to poly-3-hydroxybutyrate (P3HB) after saccharification of their carbohydrate fraction to simple sugars. A combined hydrolysis treatment using sulfamic acid followed by enzymatic hydrolysis with cellulases produced a glucose-rich hydrolysate with a negligible content of inhibitors. With this treatment a sugar yield of circa 30 % (g glucose/g biomass) was attained. The algal hydrolysates were assessed as carbon source for the production of P3HB by the halotolerant bacteria Halomonas boliviensis. A cell concentration of 8.3 g L-1 containing 41 % (w/w) of polymer and a yield (YP/S ) of 0.16 gpolymer/gglucose were attained in shake flask assays. In this work, cellulose-rich seaweed waste was shown to be an upgradable, sustainable source of carbohydrates.
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Key Words
- AGU, AmyloGlucosidase Unit
- AHG, anhydro-L-galactose
- AOAC, Association of Official Agricultural Chemists
- BHU (2), Biomass Hydrolysis Unit
- CBU, CelloBiase Unit
- CDW, cell dry weight
- FID, flame ionization detector
- FPU, Filter Paper Unit
- Fr, Froude number
- G. sesquipedale, Gelidium sesquipedale
- Gelidium sesquipedale
- H. boliviensis, Halomonas boliviensis
- HMF, 5-hydroxymethyl furfural
- Halomonas boliviensis
- KNU, Kilo Novo alpha-amylase Unit
- MSG, monosodium glutamate
- Macroalgae residues
- Mw, molecular weight
- NABH, neoagarobiose hydrolase
- NREL, National Renewable Energy. Laboratory
- P3HB, poly-3-hydroxybutyrate
- Poly-3-hydroxybutyrate
- Seaweed residues
- Waste seaweed
- dw basis, dry weight basis
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Affiliation(s)
- S. Tůma
- iBB- Institute for Bioengineering and Biosciences, Bioengineering Department, Instituto Superior Técnico, Universidade de Lisboa, Portugal
| | - J.K. Izaguirre
- iBB- Institute for Bioengineering and Biosciences, Bioengineering Department, Instituto Superior Técnico, Universidade de Lisboa, Portugal
- Neiker-Tecnalia, Basque Institute for Agricultural Research, Vitoria-Gasteiz, Spain
| | - M. Bondar
- iBB- Institute for Bioengineering and Biosciences, Bioengineering Department, Instituto Superior Técnico, Universidade de Lisboa, Portugal
| | - M.M. Marques
- iBB- Institute for Bioengineering and Biosciences, Bioengineering Department, Instituto Superior Técnico, Universidade de Lisboa, Portugal
| | - P. Fernandes
- iBB- Institute for Bioengineering and Biosciences, Bioengineering Department, Instituto Superior Técnico, Universidade de Lisboa, Portugal
- DREAMS and Faculty of Engineering, Universidade Lusófona de Humanidades e Tecnologias, Lisboa, Portugal
| | - M.M.R. da Fonseca
- iBB- Institute for Bioengineering and Biosciences, Bioengineering Department, Instituto Superior Técnico, Universidade de Lisboa, Portugal
| | - M.T. Cesário
- iBB- Institute for Bioengineering and Biosciences, Bioengineering Department, Instituto Superior Técnico, Universidade de Lisboa, Portugal
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Ortiz-Veizán N, Daga-Quisbert J, Perez-Zabaleta M, Guevara-Martínez M, Larsson G, Quillaguamán J. Improvements of poly(3-hydroxybutyrate) production in an air-lift reactor using simple production media. BIORESOUR BIOPROCESS 2020. [DOI: 10.1186/s40643-020-00308-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
Abstract
Background
Halomonas boliviensis is a halophilic microorganism that accumulates poly(3-hydroxybutyrate) (PHB) using different carbons sources when nitrogen is depleted from the culture medium. This work presents an improved production of PHB using an air-lift reactor (ALR) that was fed with a concentrated solution of a carbon source, and was supplemented with an adequate airflow rate.
Results
Simple production media were used to study PHB production by H. boliviensis in an ALR. Glucose was first used as the main carbon source and was fed during the exponential phase of cell growth. The maximum CDW and PHB content were 31.7 g/L and 51 wt%, respectively, when the airflow rate entering the reactor varied between 0.5 and 1.2 L/min. Changing the air inflow to 0.5–0.9 L/min resulted in an improvement in PHB accumulation (62 wt%). A cultivation was performed by using the latter range of airflow rate and feeding glucose only when nitrogen was depleted from the medium; a considerable enhancement in PHB content (72 wt%) and CDW (27 g/L) was achieved under these conditions. Moreover, PHB was also produced using molasses as the main carbon source. Residual cell mass was about the same to that achieved with glucose, however the PHB content (52 wt%) was lower.
Conclusions
PHB production by H. boliviensis in an ALR using a simple medium is possible. CDW and PHB content in H. boliviensis can be improved with respect to batch cultivations previously reported when a carbon source is fed to the reactor. The best strategy for the production of PHB consisted of starting the cultivation in a batch mode while glutamate was present in the medium; glucose should be fed when glutamate is depleted from the medium to keep an excess of the carbon source during the synthesis of PHB.
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Genome analysis provides insights into crude oil degradation and biosurfactant production by extremely halotolerant Halomonas desertis G11 isolated from Chott El-Djerid salt-lake in Tunisian desert. Genomics 2018; 111:1802-1814. [PMID: 30529640 DOI: 10.1016/j.ygeno.2018.12.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 09/05/2018] [Accepted: 12/04/2018] [Indexed: 01/10/2023]
Abstract
Here, we report the genomic features and the bioremediation potential of Halomonas desertis G11, a new halophilic species which uses crude oil as a carbon and energy source and displays intrinsic resistance to salt stress conditions (optimum growth at 10% NaCl). G11 genome (3.96 Mb) had a mean GC content of 57.82%, 3622 coding sequences, 480 subsystems and 64 RNA genes. Annotation predicted 38 genes involved in osmotic stress including the biosynthesis of osmoprotectants glycine-betaine, ectoine and osmoregulated periplasmic glucans. Genome analysis revealed also the versatility of the strain for emulsifying crude oil and metabolizing hydrocarbons. The ability of G11 to degrade crude oil components and to secrete a glycolipid biosurfactant with satisfying properties was experimentally confirmed and validated. Our results help to explain the exceptional capacity of G11 to survive at extreme desertic conditions, and highlight the metabolic features of this organism that has biotechnological and ecological potentialities.
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Perez-Zabaleta M, Sjöberg G, Guevara-Martínez M, Jarmander J, Gustavsson M, Quillaguamán J, Larsson G. Increasing the production of (R)-3-hydroxybutyrate in recombinant Escherichia coli by improved cofactor supply. Microb Cell Fact 2016; 15:91. [PMID: 27245326 PMCID: PMC4888404 DOI: 10.1186/s12934-016-0490-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 05/20/2016] [Indexed: 11/10/2022] Open
Abstract
Background In a recently discovered microorganism, Halomonas boliviensis, polyhydroxybutyrate production was extensive and in contrast to other PHB producers, contained a set of alleles for the enzymes of this pathway. Also the monomer, (R)-3-hydroxybutyrate (3HB), possesses features that are interesting for commercial production, in particular the synthesis of fine chemicals with chiral specificity. Production with a halophilic organism is however not without serious drawbacks, wherefore it was desirable to introduce the 3HB pathway into Escherichia coli. Results The production of 3HB is a two-step process where the acetoacetyl-CoA reductase was shown to accept both NADH and NADPH, but where the Vmax for the latter was eight times higher. It was hypothesized that NADPH could be limiting production due to less abundance than NADH, and two strategies were employed to increase the availability; (1) glutamate was chosen as nitrogen source to minimize the NADPH consumption associated with ammonium salts and (2) glucose-6-phosphate dehydrogenase was overexpressed to improve NADPH production from the pentose phosphate pathway. Supplementation of glutamate during batch cultivation gave the highest specific productivity (q3HB = 0.12 g g−1 h−1), while nitrogen depletion/zwf overexpression gave the highest yield (Y3HB/CDW = 0.53 g g−1) and a 3HB concentration of 1 g L−1, which was 50 % higher than the reference. A nitrogen-limited fedbatch process gave a concentration of 12.7 g L−1 and a productivity of 0.42 g L−1 h−1, which is comparable to maximum values found in recombinant E. coli. Conclusions Increased NADPH supply is a valuable tool to increase recombinant 3HB production in E. coli, and the inherent hydrolysis of CoA leads to a natural export of the product to the medium. Acetic acid production is still the dominating by-product and this needs attention in the future to increase the volumetric productivity further. Electronic supplementary material The online version of this article (doi:10.1186/s12934-016-0490-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Mariel Perez-Zabaleta
- Division of Industrial Biotechnology, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Center, SE 106 91, Stockholm, Sweden.,Center of Biotechnology, Faculty of Science and Technology, Universidad Mayor de San Simón, Cochabamba, Bolivia
| | - Gustav Sjöberg
- Division of Industrial Biotechnology, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Center, SE 106 91, Stockholm, Sweden
| | - Mónica Guevara-Martínez
- Division of Industrial Biotechnology, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Center, SE 106 91, Stockholm, Sweden.,Center of Biotechnology, Faculty of Science and Technology, Universidad Mayor de San Simón, Cochabamba, Bolivia
| | - Johan Jarmander
- Division of Industrial Biotechnology, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Center, SE 106 91, Stockholm, Sweden
| | - Martin Gustavsson
- Division of Industrial Biotechnology, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Center, SE 106 91, Stockholm, Sweden
| | - Jorge Quillaguamán
- Center of Biotechnology, Faculty of Science and Technology, Universidad Mayor de San Simón, Cochabamba, Bolivia
| | - Gen Larsson
- Division of Industrial Biotechnology, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Center, SE 106 91, Stockholm, 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] [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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Koechler S, Arsène-Ploetze F, Brochier-Armanet C, Goulhen-Chollet F, Heinrich-Salmeron A, Jost B, Lièvremont D, Philipps M, Plewniak F, Bertin PN, Lett MC. Constitutive arsenite oxidase expression detected in arsenic-hypertolerant Pseudomonas xanthomarina S11. Res Microbiol 2015; 166:205-14. [PMID: 25753102 DOI: 10.1016/j.resmic.2015.02.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 02/05/2015] [Accepted: 02/20/2015] [Indexed: 02/06/2023]
Abstract
Pseudomonas xanthomarina S11 is an arsenite-oxidizing bacterium isolated from an arsenic-contaminated former gold mine in Salsigne, France. This bacterium showed high resistance to arsenite and was able to oxidize arsenite to arsenate at concentrations up to 42.72 mM As[III]. The genome of this strain was sequenced and revealed the presence of three ars clusters. One of them is located on a plasmid and is organized as an "arsenic island" harbouring an aio operon and genes involved in phosphorous metabolism, in addition to the ars genes. Neither the aioXRS genes nor a specific sigma-54-dependent promoter located upstream of aioBA genes, both involved in regulation of arsenite oxidase expression in other arsenite-oxidizing bacteria, could be identified in the genome. This observation is in accordance with the fact that no difference was observed in expression of arsenite oxidase in P. xanthomarina S11, whether or not the strain was grown in the presence of As[III].
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Affiliation(s)
- Sandrine Koechler
- UMR7156 Université de Strasbourg/CNRS Génétique Moléculaire, Génomique, Microbiologie, Département Micro-organismes, Génomes, Environnement, 28 rue Goethe, 67083 Strasbourg Cedex, France.
| | - Florence Arsène-Ploetze
- UMR7156 Université de Strasbourg/CNRS Génétique Moléculaire, Génomique, Microbiologie, Département Micro-organismes, Génomes, Environnement, 28 rue Goethe, 67083 Strasbourg Cedex, France.
| | - Céline Brochier-Armanet
- Université de Lyon, Université Lyon 1, CNRS, UMR5558, Laboratoire de Biométrie et Biologie Evolutive, 43 boulevard du 11 Novembre 1918, F-69622 Villeurbanne, France.
| | - Florence Goulhen-Chollet
- UMR7156 Université de Strasbourg/CNRS Génétique Moléculaire, Génomique, Microbiologie, Département Micro-organismes, Génomes, Environnement, 28 rue Goethe, 67083 Strasbourg Cedex, France.
| | - Audrey Heinrich-Salmeron
- UMR7156 Université de Strasbourg/CNRS Génétique Moléculaire, Génomique, Microbiologie, Département Micro-organismes, Génomes, Environnement, 28 rue Goethe, 67083 Strasbourg Cedex, France.
| | - Bernard Jost
- Plateforme Biopuces et séquençage, IGBMC, 1 rue Laurent Fries Parc d'Innovation, 67400 Illkirch, France.
| | - Didier Lièvremont
- UMR7156 Université de Strasbourg/CNRS Génétique Moléculaire, Génomique, Microbiologie, Département Micro-organismes, Génomes, Environnement, 28 rue Goethe, 67083 Strasbourg Cedex, France.
| | - Muriel Philipps
- Plateforme Biopuces et séquençage, IGBMC, 1 rue Laurent Fries Parc d'Innovation, 67400 Illkirch, France.
| | - Frédéric Plewniak
- UMR7156 Université de Strasbourg/CNRS Génétique Moléculaire, Génomique, Microbiologie, Département Micro-organismes, Génomes, Environnement, 28 rue Goethe, 67083 Strasbourg Cedex, France.
| | - Philippe N Bertin
- UMR7156 Université de Strasbourg/CNRS Génétique Moléculaire, Génomique, Microbiologie, Département Micro-organismes, Génomes, Environnement, 28 rue Goethe, 67083 Strasbourg Cedex, France.
| | - Marie-Claire Lett
- UMR7156 Université de Strasbourg/CNRS Génétique Moléculaire, Génomique, Microbiologie, Département Micro-organismes, Génomes, Environnement, 28 rue Goethe, 67083 Strasbourg Cedex, France.
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Characterization of polyhydroxyalkanoate synthases from Halomonas sp. O-1 and Halomonas elongata DSM2581: Site-directed mutagenesis and recombinant expression. Polym Degrad Stab 2014. [DOI: 10.1016/j.polymdegradstab.2014.04.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Fermentative polyhydroxybutyrate production from a novel feedstock derived from bakery waste. BIOMED RESEARCH INTERNATIONAL 2014; 2014:819474. [PMID: 25136626 PMCID: PMC4127261 DOI: 10.1155/2014/819474] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 05/19/2014] [Accepted: 06/30/2014] [Indexed: 11/25/2022]
Abstract
In this study, Halomonas boliviensis was cultivated on bakery waste hydrolysate and seawater in batch and fed-batch cultures for polyhydroxybutyrate (PHB) production. Results demonstrated that bakery waste hydrolysate and seawater could be efficiently utilized by Halomonas boliviensis while PHB contents between 10 and 30% (w/w) were obtained. Furthermore, three methods for bakery waste hydrolysis were investigated for feedstock preparation. These include: (1) use of crude enzyme extracts from Aspergillus awamori, (2) Aspergillus awamori solid mashes, and (3) commercial glucoamylase. In the first method, the resultant free amino nitrogen (FAN) concentration in hydrolysates was 150 and 250 mg L−1 after 20 hours at enzyme-to-solid ratios of 6.9 and 13.1 U g−1, respectively. In both cases, the final glucose concentration was around 130–150 g L−1. In the second method, the resultant FAN and glucose concentrations were 250 mg L−1 and 150 g L−1, respectively. In the third method, highest glucose and lowest FAN concentrations of 170–200 g L−1 and 100 mg L−1, respectively, were obtained in hydrolysates after only 5 hours. The present work has generated promising information contributing to the sustainable production of bioplastic using bakery waste hydrolysate.
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Genomic studies on nitrogen metabolism in Halomonas boliviensis: Metabolic pathway, biochemistry and evolution. Comput Biol Chem 2013; 47:96-104. [DOI: 10.1016/j.compbiolchem.2013.08.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 04/25/2013] [Accepted: 08/06/2013] [Indexed: 11/23/2022]
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Improving culture conditions for poly(3-hydroxybutyrate-co-3-hydroxyvalerate) production by Bacillus sp. ND153, a bacterium isolated from a mangrove forest in Vietnam. ANN MICROBIOL 2013. [DOI: 10.1007/s13213-013-0736-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Genome Sequence of Halomonas sp. Strain A3H3, Isolated from Arsenic-Rich Marine Sediments. GENOME ANNOUNCEMENTS 2013; 1:1/5/e00819-13. [PMID: 24115546 PMCID: PMC3795216 DOI: 10.1128/genomea.00819-13] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We report the genome sequence of Halomonas sp. strain A3H3, a bacterium with a high tolerance to arsenite, isolated from multicontaminated sediments of the l’Estaque harbor in Marseille, France. The genome is composed of a 5,489,893-bp chromosome and a 157,085-bp plasmid.
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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] [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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Meyer TE, Kyndt JA, Memmi S, Moser T, Colón-Acevedo B, Devreese B, Van Beeumen JJ. The growing family of photoactive yellow proteins and their presumed functional roles. Photochem Photobiol Sci 2012; 11:1495-514. [DOI: 10.1039/c2pp25090j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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