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Elazzazy AM, Ali Abd K, Bataweel NM, Mahmoud MM, Baghdadi AM. Microbial Biosynthesis of Medium-Chain-Length Polyhydroxyalkanoate (mcl-PHA) from Waste Cooking Oil. Polymers (Basel) 2024; 16:2150. [PMID: 39125176 PMCID: PMC11314287 DOI: 10.3390/polym16152150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2024] [Revised: 07/19/2024] [Accepted: 07/19/2024] [Indexed: 08/12/2024] Open
Abstract
Waste cooking oil is a common byproduct in the culinary industry, often posing disposal challenges. This study explores its conversion into the valuable bioplastic material, medium-chain-length polyhydroxyalkanoate (mcl-PHA), through microbial biosynthesis in controlled bioreactor conditions. Twenty-four bacterial isolates were obtained from oil-contaminated soil and waste materials in Mahd Ad-Dahab, Saudi Arabia. The best PHA-producing isolates were identified via 16S rDNA analysis as Neobacillus niacini and Metabacillus niabensis, with the sequences deposited in GenBank (accession numbers: PP346270 and PP346271). This study evaluated the effects of various carbon and nitrogen sources, as well as environmental factors, such as pH, temperature, and shaking speed, on the PHA production titer. Neobacillus niacini favored waste cooking oil and yeast extract, achieving a PHA production titer of 1.13 g/L, while Metabacillus niabensis preferred waste olive oil and urea, with a PHA production titer of 0.85 g/L. Both strains exhibited optimal growth at a neutral pH of 7, under optimal shaking -flask conditions. The bioreactor performance showed improved PHA production under controlled pH conditions, with a final titer of 9.75 g/L for Neobacillus niacini and 4.78 g/L for Metabacillus niabensis. Fourier transform infrared (FT-IR) spectroscopy and gas chromatography-mass spectrometry (GC-MS) confirmed the biosynthesized polymer as mcl-PHA. This research not only offers a sustainable method for transforming waste into valuable materials, but also provides insights into the optimal conditions for microbial PHA production, advancing environmental science and materials engineering.
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Affiliation(s)
- Ahmed M. Elazzazy
- Department of Biological Sciences, College of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia; (K.A.A.); (A.M.B.)
| | - Khawater Ali Abd
- Department of Biological Sciences, College of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia; (K.A.A.); (A.M.B.)
| | - Noor M. Bataweel
- King Fahad Medical Research Centre, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (N.M.B.); (M.M.M.)
| | - Maged M. Mahmoud
- King Fahad Medical Research Centre, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (N.M.B.); (M.M.M.)
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Afra M. Baghdadi
- Department of Biological Sciences, College of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia; (K.A.A.); (A.M.B.)
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Suwannasing W, Tanamool V, Singhaboot P, Kaewkannetra P. Valorisation of Pineapple Cannery Waste as a Cost Effective Carbon Source for Poly 3-hydroxyabutyrate (P3HB) Production. Polymers (Basel) 2023; 15:3297. [PMID: 37571191 PMCID: PMC10422540 DOI: 10.3390/polym15153297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/17/2023] [Accepted: 06/28/2023] [Indexed: 08/13/2023] Open
Abstract
Pineapple is one of the most important agro-industrial sugar-based fruits in Thailand. In this study, the waste stream from pineapple cannery processing was utilised and evaluated for potential use in the production of a main biopolymer group widely known as polyhydroxyalkanoates (PHAs) through aerobic batch fermentation. Firstly, pineapple cannery waste (PCW) collected from three processing sources, pineapple juice (PAJ), peel and core juice (PCJ), and pulp-washing water (PWW), was used as a carbon source. Secondly, it was characterised and pretreated. Then, batch fermentation was performed by using the optimal condition (200 rpm agitation rate, 37 °C, and fermentation time of 72 h) under two different nutrient conditions in each type of carbon source. The results revealed that PHAs were produced during 24-72 h of fermentation without any interference. The PHAs product obtained was characterised by their properties. Interestingly, GC-MS showed homopolymer of poly 3-hydroxybutyrate (P3HB) group characteristics, such as OH, CH, and C=O; meanwhile, H1 NMR analysis showed signals corresponding to CH3, CH2, and CH, respectively. Remarkably, utilising the PCW showed a high-potential cheap carbon source for the production of PHAs as well as for the treatment of wastewater from the fruit industry.
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Affiliation(s)
- Waranya Suwannasing
- Department of Intellectual Property, Ministry of Commerce, Nonthaburi 11000, Thailand;
| | - Varavut Tanamool
- Chemistry Program, Faculty of Science and Technology, Nakhon Ratchasima Rajabhat University, Nakhon Ratchasima 30000, Thailand;
| | - Pakjirat Singhaboot
- Faculty of Agricultural Product Innovation and Technology, Srinakharinwirot University, Nakhon Nayok 26120, Thailand;
| | - Pakawadee Kaewkannetra
- Department of Biotechnology, Faculty of Technology, Khon Kaen Univerisity, Khon Kaen 40002, Thailand
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3
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Martínez-Herrera RE, Alemán-Huerta ME, Rutiaga-Quiñones OM, de Luna-Santillana EJ, Elufisan TO. A comprehensive view of Bacillus cereus as a polyhydroxyalkanoate (PHA) producer: A promising alternative to Petroplastics. Process Biochem 2023. [DOI: 10.1016/j.procbio.2023.03.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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4
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Grey A, Costeira R, Lorenzo E, O’Kane S, McCaul MV, McCarthy T, Jordan SF, Allen CCR, Kelleher BP. Biogeochemical properties of blue carbon sediments influence the distribution and monomer composition of bacterial polyhydroxyalkanoates (PHA). BIOGEOCHEMISTRY 2023; 162:359-380. [PMID: 36873379 PMCID: PMC9971093 DOI: 10.1007/s10533-022-01008-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 11/25/2022] [Indexed: 06/18/2023]
Abstract
UNLABELLED Coastal wetlands are highly efficient 'blue carbon' sinks which contribute to mitigating climate change through the long-term removal of atmospheric CO2 and capture of carbon (C). Microorganisms are integral to C sequestration in blue carbon sediments and face a myriad of natural and anthropogenic pressures yet their adaptive responses are poorly understood. One such response in bacteria is the alteration of biomass lipids, specifically through the accumulation of polyhydroxyalkanoates (PHAs) and alteration of membrane phospholipid fatty acids (PLFA). PHAs are highly reduced bacterial storage polymers that increase bacterial fitness in changing environments. In this study, we investigated the distribution of microbial PHA, PLFA profiles, community structure and response to changes in sediment geochemistry along an elevation gradient from intertidal to vegetated supratidal sediments. We found highest PHA accumulation, monomer diversity and expression of lipid stress indices in elevated and vegetated sediments where C, nitrogen (N), PAH and heavy metals increased, and pH was significantly lower. This was accompanied by a reduction in bacterial diversity and a shift to higher abundances of microbial community members favouring complex C degradation. Results presented here describe a connection between bacterial PHA accumulation, membrane lipid adaptation, microbial community composition and polluted C rich sediments. GRAPHICAL ABSTRACT Geochemical, microbiological and polyhydroxyalkanoate (PHA) gradient in a blue carbon zone. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s10533-022-01008-5.
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Affiliation(s)
- Anthony Grey
- School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Ricardo Costeira
- The School of Biological Sciences, Queen’s University Belfast, Belfast, Northern Ireland
| | - Emmaline Lorenzo
- Department of Chemistry, University of Kansas, Lawrence, 66045 USA
| | - Sean O’Kane
- National Centre for Geocomputation, Maynooth University, Maynooth, Ireland
| | - Margaret V. McCaul
- Insight SFI Research Centre for Data Analytics, Dublin City University, Dublin 4, Ireland
| | - Tim McCarthy
- National Centre for Geocomputation, Maynooth University, Maynooth, Ireland
| | - Sean F. Jordan
- Insight SFI Research Centre for Data Analytics, Dublin City University, Dublin 4, Ireland
| | | | - Brian P. Kelleher
- School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
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Sivashankari RM, Mierzati M, Miyahara Y, Mizuno S, Nomura CT, Taguchi S, Abe H, Tsuge T. Exploring Class I polyhydroxyalkanoate synthases with broad substrate specificity for polymerization of structurally diverse monomer units. Front Bioeng Biotechnol 2023; 11:1114946. [PMID: 36896015 PMCID: PMC9989198 DOI: 10.3389/fbioe.2023.1114946] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 02/06/2023] [Indexed: 02/23/2023] Open
Abstract
Polyhydroxyalkanoate (PHA) synthases (PhaCs) are key enzymes in PHA polymerization. PhaCs with broad substrate specificity are attractive for synthesizing structurally diverse PHAs. In the PHA family, 3-hydroxybutyrate (3HB)-based copolymers are industrially produced using Class I PhaCs and can be used as practical biodegradable thermoplastics. However, Class I PhaCs with broad substrate specificities are scarce, prompting our search for novel PhaCs. In this study, four new PhaCs from the bacteria Ferrimonas marina, Plesiomonas shigelloides, Shewanella pealeana, and Vibrio metschnikovii were selected via a homology search against the GenBank database, using the amino acid sequence of Aeromonas caviae PHA synthase (PhaCAc), a Class I enzyme with a wide range of substrate specificities, as a template. The four PhaCs were characterized in terms of their polymerization ability and substrate specificity, using Escherichia coli as a host for PHA production. All the new PhaCs were able to synthesize P(3HB) in E. coli with a high molecular weight, surpassing PhaCAc. The substrate specificity of PhaCs was evaluated by synthesizing 3HB-based copolymers with 3-hydroxyhexanoate, 3-hydroxy-4-methylvalerate, 3-hydroxy-2-methylbutyrate, and 3-hydroxypivalate monomers. Interestingly, PhaC from P. shigelloides (PhaCPs) exhibited relatively broad substrate specificity. PhaCPs was further engineered through site-directed mutagenesis, and the variant resulted in an enzyme with improved polymerization ability and substrate specificity.
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Affiliation(s)
| | - Maierwufu Mierzati
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Yokohama, Japan
| | - Yuki Miyahara
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Yokohama, Japan
| | - Shoji Mizuno
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Yokohama, Japan
| | - Christopher T Nomura
- Department of Biological Sciences, College of Science, University of Idaho, Moscow, ID, United States
| | - Seiichi Taguchi
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
| | - Hideki Abe
- Bioplastic Research Team, RIKEN Center for Sustainable Resource Science, Wako, Japan
| | - Takeharu Tsuge
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Yokohama, Japan
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6
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Modeling of poly-β-hydroxybutyrate production by Bacillus subtilis and its use for feed-forward bioreactor studies. Appl Microbiol Biotechnol 2022; 107:57-69. [DOI: 10.1007/s00253-022-12266-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 10/27/2022] [Accepted: 10/30/2022] [Indexed: 11/26/2022]
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7
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Draft Genome Sequence of a Polyhydroxyalkanoate-Producing Bacillus cereus Strain Isolated from Nuevo Leon State, Mexico. Microbiol Resour Announc 2022; 11:e0026922. [PMID: 35652668 PMCID: PMC9302066 DOI: 10.1128/mra.00269-22] [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] [Indexed: 11/20/2022] Open
Abstract
Polyhydroxyalkanoates (PHA) are microbially produced biopolymers which are biodegradable and biocompatible. These compounds produced by microorganisms have been described as a potent alternative to synthetic plastics, which are often recalcitrant. Here, we report the draft genome sequence of a PHA-producing Bacillus cereus isolated in our laboratory.
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8
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Screening Method for Polyhydroxyalkanoate Synthase Mutants Based on Polyester Degree of Polymerization Using High-Performance Liquid Chromatography. Microorganisms 2021; 9:microorganisms9091949. [PMID: 34576844 PMCID: PMC8469876 DOI: 10.3390/microorganisms9091949] [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: 07/28/2021] [Revised: 09/08/2021] [Accepted: 09/08/2021] [Indexed: 11/29/2022] Open
Abstract
A high-throughput screening method based on the degree of polymerization (DP) of polyhydroxyalkanoate (PHA) was developed using high-performance liquid chromatography (HPLC). In this method, PHA production was achieved using recombinant Escherichia coli supplemented with benzyl alcohol as a chain terminal compound. The cultured cells containing benzyl alcohol-capped PHA were decomposed by alkaline treatment, and the peaks of the decomposed monomer and benzyl alcohol were detected using HPLC. The DP of PHA could be determined from the peak ratio of the decomposed monomer to terminal benzyl alcohol. The measured DP was validated by other instrumental analyses using purified PHA samples. Using this system, mutants of PHA synthase from Bacillus cereus YB-4 (PhaRCYB4) were screened, and some enzymes capable of producing PHA with higher DP than the wild-type enzyme were obtained. The PHA yields of two of these enzymes were equivalent to the yield of the wild-type enzyme. Therefore, this screening method is suitable for the selection of beneficial mutants that can produce high molecular weight PHAs.
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9
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Martínez-Herrera RE, Alemán-Huerta ME, Almaguer-Cantú V, Rosas-Flores W, Martínez-Gómez VJ, Quintero-Zapata I, Rivera G, Rutiaga-Quiñones OM. Efficient recovery of thermostable polyhydroxybutyrate (PHB) by a rapid and solvent-free extraction protocol assisted by ultrasound. Int J Biol Macromol 2020; 164:771-782. [DOI: 10.1016/j.ijbiomac.2020.07.101] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/24/2020] [Accepted: 07/09/2020] [Indexed: 01/22/2023]
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10
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Penkhrue W, Jendrossek D, Khanongnuch C, Pathom-aree W, Aizawa T, Behrens RL, Lumyong S. Response surface method for polyhydroxybutyrate (PHB) bioplastic accumulation in Bacillus drentensis BP17 using pineapple peel. PLoS One 2020; 15:e0230443. [PMID: 32191752 PMCID: PMC7082031 DOI: 10.1371/journal.pone.0230443] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 02/29/2020] [Indexed: 01/21/2023] Open
Abstract
Polyhydroxybutyrate (PHB) is a biodegradable biopolymer which is useful for various applications including packing, medical and coating materials. An endospore-forming bacterium (strain BP17) was isolated from composted soil and evaluated for PHB production. Strain BP17, taxonomically identified as Bacillus drentensis, showed enhanced PHB accumulation and was selected for further studies. To achieve maximum PHB production, the culture conditions for B. drentensis BP17 were optimized through response surface methodology (RSM) employing central composite rotatable design (CCRD). The final optimum fermentation conditions included: pineapple peel solution, 11.5% (v/v); tryptic soy broth (TSB), 60 g/L; pH, 6.0; inoculum size, 10% (v/v) and temperature, 28°C for 36 h. This optimization yielded 5.55 g/L of PHB compared to the non-optimized condition (0.17 g/L). PHB accumulated by B. drentensis BP17 had a polydispersity value of 1.59 and an average molecular weight of 1.15x105 Da. Thermal analyses revealed that PHB existed as a thermally stable semi-crystalline polymer, exhibiting a thermal degradation temperature of 228°C, a melting temperature of 172°C and an apparent melting enthalpy of fusion of 83.69 J/g. It is evident that B. drentensis strain BP17 is a promising bacterium candidate for PHB production using agricultural waste, such as pineapple peel as a low-cost alternative carbon source for PHB production.
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Affiliation(s)
- Watsana Penkhrue
- Research Center of Excellence in Microbial Diversity and Sustainable Utilization, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
- School of Preclinic, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | - Dieter Jendrossek
- Institute of Microbiology, University of Stuttgart, Stuttgart, Germany
| | - Chartchai Khanongnuch
- Division of Biotechnology, Faculty of Agro-Industry, Chiang Mai University, Chiang Mai, Thailand
| | - Wasu Pathom-aree
- Research Center of Excellence in Microbial Diversity and Sustainable Utilization, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
| | - Tomoyasu Aizawa
- Faculty of Advanced Life Science, Hokkaido University, Sapporo, Japan
- Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo, Japan
| | - Rachel L. Behrens
- Polymer Facility Technical Director, UCSB, MRL, Santa Barbara, CA, United States of America
| | - S. Lumyong
- Research Center of Excellence in Microbial Diversity and Sustainable Utilization, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
- Academy of Science, The Royal Society of Thailand, Bangkok, Thailand
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11
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Hassan MA, Bakhiet EK, Hussein HR, Ali SG. Statistical optimization studies for polyhydroxybutyrate (PHB) production by novel Bacillus subtilis using agricultural and industrial wastes. INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY 2019; 16:3497-3512. [DOI: 10.1007/s13762-018-1900-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 06/21/2018] [Accepted: 07/06/2018] [Indexed: 10/30/2023]
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12
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Wang P, Qiu YQ, Chen XT, Liang XF, Ren LH. Metabolomic insights into polyhydroxyalkanoates production by halophilic bacteria with acetic acid as carbon source. Biosci Biotechnol Biochem 2019; 83:1955-1963. [PMID: 31200628 DOI: 10.1080/09168451.2019.1630252] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A metabolomics method was established to analyze changes of intracellular metabolites and study the mechanism for enhancing polyhydroxyalkanoates production by halotolerant bacteria, Bacillus cereus strain HY-3, using acetic acid as carbon source. Maximum poly(3-hydroxybutyrate) (PHB) contents for the medium with 0.5 g/L and 5.0 g/L of acetic acid were 41.0 ± 0.415% and 49.2 ± 1.21%. Principal components analysis revealed clear metabolic differences in different growth stages and different concentrations of carbon source. According to statistical analysis, 3-hydroxybutyrate (3-HB), serine, threonine, malate, and pyruvate were determined as potential biomarkers for PHB production. Moreover, metabolic pathways analysis indicated that high level of 3-HB in death phase was due to the limitation of carbon source. Metabolism of glycine, serine, and threonine was influential pathway for PHB production among amino acid metabolisms. High levels of organic acids from the TCA cycle could stimulate the carbon source flux into PHB biosynthetic pathway.
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Affiliation(s)
- Pan Wang
- School of Food and Chemical Engineering, Beijing Technology and Business University , Beijing , China
| | - Yin-Quan Qiu
- School of Food and Chemical Engineering, Beijing Technology and Business University , Beijing , China
| | - Xi-Teng Chen
- School of Food and Chemical Engineering, Beijing Technology and Business University , Beijing , China
| | - Xiao-Fei Liang
- School of Food and Chemical Engineering, Beijing Technology and Business University , Beijing , China
| | - Lian-Hai Ren
- School of Food and Chemical Engineering, Beijing Technology and Business University , Beijing , China
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13
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Production of polyhydroxybutyrate from oil palm empty fruit bunch (OPEFB) hydrolysates by Bacillus cereus suaeda B-001. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.01.057] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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14
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Comparative evaluation of physico-chemical characteristics of biopolyesters P(3HB) and P(3HB-co-3HV) produced by endophytic Bacillus cereus RCL 02. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/s11515-018-1509-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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15
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Sakthiselvan P, Madhumathi R. Kinetic evaluation on cell growth and biosynthesis of polyhydroxybutyrate (PHB) by Bacillus safensis EBT1 from sugarcane bagasse. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.eaef.2018.03.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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16
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Kihara T, Hiroe A, Ishii-Hyakutake M, Mizuno K, Tsuge T. Bacillus cereus-type polyhydroxyalkanoate biosynthetic gene cluster contains R-specific enoyl-CoA hydratase gene. Biosci Biotechnol Biochem 2017; 81:1627-1635. [PMID: 28532241 DOI: 10.1080/09168451.2017.1325314] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Bacillus cereus and Bacillus megaterium both accumulate polyhydroxyalkanoate (PHA) but their PHA biosynthetic gene (pha) clusters that code for proteins involved in PHA biosynthesis are different. Namely, a gene encoding MaoC-like protein exists in the B. cereus-type pha cluster but not in the B. megaterium-type pha cluster. MaoC-like protein has an R-specific enoyl-CoA hydratase (R-hydratase) activity and is referred to as PhaJ when involved in PHA metabolism. In this study, the pha cluster of B. cereus YB-4 was characterized in terms of PhaJ's function. In an in vitro assay, PhaJ from B. cereus YB-4 (PhaJYB4) exhibited hydration activity toward crotonyl-CoA. In an in vivo assay using Escherichia coli as a host for PHA accumulation, the recombinant strain expressing PhaJYB4 and PHA synthase led to increased PHA accumulation, suggesting that PhaJYB4 functioned as a monomer supplier. The monomer composition of the accumulated PHA reflected the substrate specificity of PhaJYB4, which appeared to prefer short chain-length substrates. The pha cluster from B. cereus YB-4 functioned to accumulate PHA in E. coli; however, it did not function when the phaJYB4 gene was deleted. The B. cereus-type pha cluster represents a new example of a pha cluster that contains the gene encoding PhaJ.
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Affiliation(s)
- Takahiro Kihara
- a Department of Materials Science and Engineering, Tokyo Institute of Technology , Midori-ku, Yokohama , Japan.,b Department of Innovative and Engineered Materials, Tokyo Institute of Technology , Midori-ku, Yokohama , Japan
| | - Ayaka Hiroe
- a Department of Materials Science and Engineering, Tokyo Institute of Technology , Midori-ku, Yokohama , Japan.,b Department of Innovative and Engineered Materials, Tokyo Institute of Technology , Midori-ku, Yokohama , Japan
| | - Manami Ishii-Hyakutake
- c Bioplastic Research Team, RIKEN Biomass Engineering Program , Wako-shi, Saitama , Japan
| | - Kouhei Mizuno
- d Department of Creative Engineering , National Institute of Technology, Kitakyushu College , Kitakyushu , Japan
| | - Takeharu Tsuge
- a Department of Materials Science and Engineering, Tokyo Institute of Technology , Midori-ku, Yokohama , Japan
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17
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Balakrishna Pillai A, Jaya Kumar A, Thulasi K, Kumarapillai H. Evaluation of short-chain-length polyhydroxyalkanoate accumulation in Bacillus aryabhattai. Braz J Microbiol 2017; 48:451-460. [PMID: 28359856 PMCID: PMC5498450 DOI: 10.1016/j.bjm.2017.01.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 10/27/2016] [Accepted: 01/10/2017] [Indexed: 01/09/2023] Open
Abstract
This study was focused on the polyhydroxybutyrate (PHB) accumulation property of Bacillus aryabhattai isolated from environment. Twenty-four polyhydroxyalkanoate (PHA) producers were screened out from sixty-two environmental bacterial isolates based on Sudan Black B colony staining. Based on their PHA accumulation property, six promising isolates were further screened out. The most productive isolate PHB10 was identified as B. aryabhattai PHB10. The polymer production maxima were 3.264 g/L, 2.181 g/L, 1.47 g/L, 1.742 g/L and 1.786 g/L in glucose, fructose, maltose, starch and glycerol respectively. The bacterial culture reached its stationary and declining phases at 18 h and 21 h respectively and indicated growth-associated PHB production. Nuclear Magnetic Resonance (NMR) spectra confirmed the material as PHB. The material has thermal stability between 30 and 140 °C, melting point at 170 °C and maximum thermal degradation at 287 °C. The molecular weight and poly dispersion index of the polymer were found as 199.7 kDa and 2.67 respectively. The bacterium B. aryabhattai accumulating PHB up to 75% of cell dry mass utilizing various carbon sources is a potential candidate for large scale production of bacterial polyhydroxybutyrate.
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Affiliation(s)
- Aneesh Balakrishna Pillai
- Rajiv Gandhi Centre for Biotechnology (RGCB), Environmental Biology Laboratory, Thiruvananthapuram, Kerala, India
| | - Arjun Jaya Kumar
- Rajiv Gandhi Centre for Biotechnology (RGCB), Environmental Biology Laboratory, Thiruvananthapuram, Kerala, India
| | - Kavitha Thulasi
- Rajiv Gandhi Centre for Biotechnology (RGCB), Environmental Biology Laboratory, Thiruvananthapuram, Kerala, India
| | - Harikrishnan Kumarapillai
- Rajiv Gandhi Centre for Biotechnology (RGCB), Environmental Biology Laboratory, Thiruvananthapuram, Kerala, India.
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18
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Hauschild P, Röttig A, Madkour MH, Al-Ansari AM, Almakishah NH, Steinbüchel A. Lipid accumulation in prokaryotic microorganisms from arid habitats. Appl Microbiol Biotechnol 2017; 101:2203-2216. [PMID: 28175949 DOI: 10.1007/s00253-017-8149-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 01/23/2017] [Accepted: 01/25/2017] [Indexed: 12/20/2022]
Abstract
This review shall provide support for the suitability of arid environments as preferred location to search for unknown lipid-accumulative bacteria. Bacterial lipids are attracting more and more attention as sustainable replacement for mineral oil in fuel and plastic production. The development of prokaryotic microorganisms in arid desert habitats is affected by its harsh living conditions. Drought, nutrient limitation, strong radiation, and extreme temperatures necessitate effective adaption mechanisms. Accumulation of storage lipids as energy reserve and source of metabolic water represents a common adaption in desert animals and presumably in desert bacteria and archaea as well. Comparison of corresponding literature resulted in several bacterial species from desert habitats, which had already been described as lipid-accumulative elsewhere. Based on the gathered information, literature on microbial communities in hot desert, cold desert, and humid soil were analyzed on its content of lipid-accumulative bacteria. With more than 50% of the total community size in single studies, hot deserts appear to be more favorable for lipid-accumulative species then humid soil (≤20%) and cold deserts (≤17%). Low bacterial lipid accumulation in cold deserts is assumed to result from the influence of low temperatures on fatty acids and the increased necessity of permanent adaption methods.
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Affiliation(s)
- Philippa Hauschild
- Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, Corrensstraße 3, D-48149, Münster, Germany
| | - Annika Röttig
- Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, Corrensstraße 3, D-48149, Münster, Germany
| | - Mohamed H Madkour
- Environmental Sciences Department, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Ahmed M Al-Ansari
- Environmental Sciences Department, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Naief H Almakishah
- Environmental Sciences Department, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Alexander Steinbüchel
- Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, Corrensstraße 3, D-48149, Münster, Germany. .,Environmental Sciences Department, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
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Mizuno K, Kihara T, Tsuge T, Lundgren BR, Sarwar Z, Pinto A, Nomura CT. Cloning and heterologous expression of a novel subgroup of class IV polyhydroxyalkanoate synthase genes from the genus Bacillus. Biosci Biotechnol Biochem 2017; 81:194-196. [DOI: 10.1080/09168451.2016.1230006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Abstract
Many microorganisms harbor genes necessary to synthesize biodegradable plastics known as polyhydroxyalkanoates (PHAs). We surveyed a genomic database and discovered a new cluster of class IV PHA synthase genes (phaRC). These genes are different in sequence and operon structure from any previously reported PHA synthase. The newly discovered PhaRC synthase was demonstrated to produce PHAs in recombinant Escherichia coli.
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Affiliation(s)
- Kouhei Mizuno
- Department of Creative Engineering, Kitakyushu National College of Technology, Kitakyushu, Japan
| | - Takahiro Kihara
- Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Yokohama, Japan
| | - Takeharu Tsuge
- Department of Innovative and Engineered Materials, Tokyo Institute of Technology, Yokohama, Japan
| | - Benjamin R Lundgren
- Department of Chemistry, College of Environmental Science and Forestry, State University of New York, Syracuse, NY, USA
| | - Zaara Sarwar
- Department of Chemistry, College of Environmental Science and Forestry, State University of New York, Syracuse, NY, USA
| | - Atahualpa Pinto
- Department of Chemistry, College of Environmental Science and Forestry, State University of New York, Syracuse, NY, USA
| | - Christopher T Nomura
- Department of Chemistry, College of Environmental Science and Forestry, State University of New York, Syracuse, NY, USA
- Center for Applied Microbiology, College of Environmental Science and Forestry, State University of New York, Syracuse, NY, USA
- Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, College of Life Sciences, Hubei University, Wuhan, People's Republic of China
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Wu CY, Lui WB, Peng J. Response Surface Methodology Approach for Optimization of Extrusion Process of Production of Poly (Hydroxyl Butyrate-Co-Hydroxyvalerate) /Tapioca Starch Blends. INTERNATIONAL JOURNAL OF FOOD ENGINEERING 2017. [DOI: 10.1515/ijfe-2016-0209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Response surface methodology (RSM) was adopted to investigate the optimum operation conditions to develop the biodegradable pellet and to analyze the effects of extrusion processing variables, including tapioca starch content (30–50 %), xylitol content (45–75 g) and barrel temperature (140–170 °C) on characteristics of the Poly (hydroxybutyrate-co-hydroxyvalerate) (PHBV)-starch composites. Maximum loading and maximum displacement of composites could be improved with a deliberate amount of xylitol as well as with rising barrel temperature. The water absorption reduced by addition of xylitol in comparison to increasing tapioca starch content. Coefficients of determination were higher than 0.85 of the response variables and significant regression models were applied to RSM optimization. Based on the response surface and superimposed plots, the compromised optimization condition obtained by numerical optimization was 39.04 % of tapioca-starch content, 56.99 g of xylitol content and 156.58 °C of barrel temperature.
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Ali I, Jamil N. Biosynthesis and Characterization of Poly3-hydroxyalkanote (PHA) from Newly Isolated Bacterium Bacillus sp. AZR-1. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY, TRANSACTIONS A: SCIENCE 2016. [DOI: 10.1007/s40995-016-0132-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Advances and needs for endotoxin-free production strains. Appl Microbiol Biotechnol 2015; 99:9349-60. [PMID: 26362682 DOI: 10.1007/s00253-015-6947-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 08/16/2015] [Accepted: 08/20/2015] [Indexed: 10/23/2022]
Abstract
The choice of an appropriate microbial host cell and suitable production conditions is crucial for the downstream processing of pharmaceutical- and food-grade products. Although Escherichia coli serves as a highly valuable leading platform for the production of value-added products, like most Gram-negative bacteria, this bacterium contains a potent immunostimulatory lipopolysaccharide (LPS), referred to as an endotoxin. In contrast, Gram-positive bacteria, notably Bacillus, lactic acid bacteria (LAB), Corynebacterium, and yeasts have been extensively used as generally recognized as safe (GRAS) endotoxin-free platforms for the production of a variety of products. This review summarizes the currently available knowledge on the utilization of these representative Gram-positive bacteria for the production of eco- and bio-friendly products, particularly natural polyesters, polyhydroxyalkanoates, bacteriocins, and membrane proteins. The successful case studies presented here serve to inspire the use of these microorganisms as a main-player or by-player depending on their individual properties for the industrial production of these desirable targets.
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Tsuge T, Hyakutake M, Mizuno K. Class IV polyhydroxyalkanoate (PHA) synthases and PHA-producing Bacillus. Appl Microbiol Biotechnol 2015; 99:6231-40. [PMID: 26135986 DOI: 10.1007/s00253-015-6777-9] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Revised: 06/11/2015] [Accepted: 06/17/2015] [Indexed: 12/28/2022]
Abstract
This review highlights the recent investigations of class IV polyhydroxyalkanoate (PHA) synthases, the newest classification of PHA synthases. Class IV synthases are prevalent in organisms of the Bacillus genus and are composed of a catalytic subunit PhaC (approximately 40 kDa), which has a PhaC box sequence ([GS]-X-C-X-[GA]-G) at the active site, and a second subunit PhaR (approximately 20 kDa). The representative PHA-producing Bacillus strains are Bacillus megaterium and Bacillus cereus; the nucleotide sequence of phaC and the genetic organization of the PHA biosynthesis gene locus are somewhat different between these two strains. It is generally considered that class IV synthases favor short-chain-length monomers such as 3-hydroxybutyrate (C4) and 3-hydroxyvalerate (C5) for polymerization, but can polymerize some unusual monomers as minor components. In Escherichia coli expressing PhaRC from B. cereus YB-4, the biosynthesized PHA undergoes synthase-catalyzed alcoholytic cleavage using endogenous and exogenous alcohols. This alcoholysis is thought to be shared among class IV synthases, and this reaction is useful not only for the regulation of PHA molecular weight but also for the modification of the PHA carboxy terminus. The novel properties of class IV synthases will open up the possibility for the design of new PHA materials.
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Affiliation(s)
- Takeharu Tsuge
- Department of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8502, Japan,
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Hyakutake M, Tomizawa S, Sugahara I, Murata E, Mizuno K, Abe H, Tsuge T. Carboxy-terminal modification of polyhydroxyalkanoate (PHA) via alcoholysis reaction catalyzed by Class IV PHA synthase. Polym Degrad Stab 2015. [DOI: 10.1016/j.polymdegradstab.2015.04.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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A common active site of polyhydroxyalkanoate synthase from Bacillus cereus YB-4 is involved in polymerization and alcoholysis reactions. Appl Microbiol Biotechnol 2014; 99:4701-11. [DOI: 10.1007/s00253-014-6276-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 11/25/2014] [Accepted: 11/26/2014] [Indexed: 10/24/2022]
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Potential of Kalopanax septemlobus Leaf Extract in Synthesis of Silver Nanoparticles for Selective Inhibition of Specific Bacterial Strain in Mixed Culture. Appl Biochem Biotechnol 2014; 174:587-601. [DOI: 10.1007/s12010-014-1077-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Accepted: 07/22/2014] [Indexed: 10/25/2022]
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A laboratory case study of efficient polyhydoxyalkonates production by Bacillus cereus, a contaminant in Saccharophagus degradans ATCC 43961 in minimal sea salt media. Curr Microbiol 2014; 69:832-8. [PMID: 25085545 DOI: 10.1007/s00284-014-0664-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Accepted: 06/14/2014] [Indexed: 10/25/2022]
Abstract
A contaminating bacterium growing along with the stock culture of Saccharophagus degradans ATCC 43961 (Sde 2-40) on marine agar plate was isolated and investigated for its ability to produce polyhydoxyalkonates (PHA). Preliminary screening by Sudan black B and Nile blue A staining indicated positive characteristic of the isolate to produce PHA. The isolate was able to grow and produce PHA in minimal sea salt medium broth. PHA quantification studies with gas chromatographic analyses of the dry cells derived from culture broths revealed accumulation of PHA in bacterial cells. PHA production started after 20 h and increased with cell growth and attained maximum values of 61 % of dry cell weight at 70 h of cultivation. After 70 h, a slight decrease in the level of PHA content was observed. The nature/type of PHA was found to be poly(3-hydroxybutyraye) by Fourier transform-infrared spectroscopy. Microbiological and 16S rRNA gene sequencing analyses suggested that the PHA producing bacterial isolate belongs to Bacillus genera and shows 100 % nucleotide sequence similarity with Bacillus cereus species in GenBank. This study is a first report for ability of Bacillus species to grow in marine sea salt media and produce PHA. The media used for the polymer production was novel in the context of the genus Bacillus and the production of PHA was three-fold higher than Sde 2-40 using same growth medium. This study shows that the contaminant bacteria once properly investigated can be used for advantageous characteristic of metabolites production in place of original cultures.
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Liu Y, Huang S, Zhang Y, Xu F. Isolation and characterization of a thermophilic Bacillus shackletonii K5 from a biotrickling filter for the production of polyhydroxybutyrate. J Environ Sci (China) 2014; 26:1453-1462. [PMID: 25079994 DOI: 10.1016/j.jes.2014.05.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 10/09/2013] [Accepted: 12/08/2013] [Indexed: 06/03/2023]
Abstract
Polyhydroxyalkanoates (PHAs) are aliphatic polyesters accumulated intracellularly by both Gram-negative and Gram-positive bacteria. However, compared to the PHAs of Gram-negative bacteria, few endotoxins (lipopolysaccharides, LPS), which would be co-purified with PHAs and cause immunogenic reactions, are found in the PHAs produced by Gram-positive bacteria. A thermophilic Gram-positive bacterium K5, which exhibited good growth and polyhydroxybutyrate (PHB)-accumulating ability, has been isolated and characterized from a biotrickling filter designed for the removal of NOx from flue gas in a coal-fired power plant in China. Based on the biochemical characterization and 16S rRNA gene sequence (Genbank accession no. JX437933), the strain K5 has been identified as Bacillus shackletonii, which has rarely been reported in the literature, and this report is the first time that B. shackletonii has been found to accumulate PHB. The strain K5 was able to utilize glucose as carbon source to synthesize PHB at a broad range of temperatures (from 35 to 50°C), and the ideal temperature was 45°C. The strain K5 could effectively yield PHB of up to 69.9% of its cell dry weight (CDW) (2.28 g/L) in flask experiments employing glucose as carbon source at 45°C, followed by 56.8% and 52.3% of its CDW when using sodium succinate and glycerol as carbon source, respectively. For batch cultivation, the strain K5 was able to produce PHB of up to 72.6% of its cell dry weight (9.76 g/L) employing glucose as carbon source at 45°C and pH7.0.
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Affiliation(s)
- Yong Liu
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, College of Environment and Energy, South China University of Technology, Guangzhou 510006, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Shaobin Huang
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, College of Environment and Energy, South China University of Technology, Guangzhou 510006, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education China, Guangzhou 510006, China; The Key Laboratory of Environmental Protection and Eco-Remediation of Guangdong Regular Higher Education Institutions, Guangzhou 510006, China.
| | - Yongqing Zhang
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, College of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education China, Guangzhou 510006, China
| | - Fuqian Xu
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, College of Environment and Energy, South China University of Technology, Guangzhou 510006, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
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Polyhydroxyalkanoate (PHA) Synthesis by Class IV PHA Synthases EmployingRalstonia eutrophaPHB−4 as Host Strain. Biosci Biotechnol Biochem 2014; 75:1615-7. [DOI: 10.1271/bbb.110229] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Alcoholytic cleavage of polyhydroxyalkanoate chains by class IV synthases induced by endogenous and exogenous ethanol. Appl Environ Microbiol 2013; 80:1421-9. [PMID: 24334666 DOI: 10.1128/aem.03576-13] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Polyhydroxyalkanoate (PHA)-producing Bacillus strains express class IV PHA synthase, which is composed of the subunits PhaR and PhaC. Recombinant Escherichia coli expressing PHA synthase from Bacillus cereus strain YB-4 (PhaRCYB-4) showed an unusual reduction of the molecular weight of PHA produced during the stationary phase of growth. Nuclear magnetic resonance analysis of the low-molecular-weight PHA revealed that its carboxy end structure was capped by ethanol, suggesting that the molecular weight reduction was the result of alcoholytic cleavage of PHA chains by PhaRCYB-4 induced by endogenous ethanol. This scission reaction was also induced by exogenous ethanol in both in vivo and in vitro assays. In addition, PhaRCYB-4 was observed to have alcoholysis activity for PHA chains synthesized by other synthases. The PHA synthase from Bacillus megaterium (PhaRCBm) from another subgroup of class IV synthases was also assayed and was shown to have weak alcoholysis activity for PHA chains. These results suggest that class IV synthases may commonly share alcoholysis activity as an inherent feature.
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Kumar P, Patel SK, Lee JK, Kalia VC. Extending the limits of Bacillus for novel biotechnological applications. Biotechnol Adv 2013; 31:1543-61. [DOI: 10.1016/j.biotechadv.2013.08.007] [Citation(s) in RCA: 167] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 07/01/2013] [Accepted: 08/05/2013] [Indexed: 12/28/2022]
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Masood F, Chen P, Yasin T, Hasan F, Ahmad B, Hameed A. Synthesis of poly-(3-hydroxybutyrate-co-12 mol % 3-hydroxyvalerate) by Bacillus cereus FB11: its characterization and application as a drug carrier. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:1927-1937. [PMID: 23674059 DOI: 10.1007/s10856-013-4946-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Accepted: 04/29/2013] [Indexed: 06/02/2023]
Abstract
The synthesis of microbial polyhydroxyalkanoate is investigated in this work for it potential application as drug carrier for cancer therapy. The bacterial isolate Bacillus cereus FB11 has synthesized poly-(3-hydroxybutyrate-co-3-hydroxyvalerate) copolymer under nutrient stress conditions using glucose as a sole carbon source. The FTIR spectrum of the purified copolymer showed the characteristic absorption bands at 1,719, 1,260 and 2,931 cm(-1) attributing to C=O, C-O stretching and C-H vibrations, respectively. The result of (1)H-NMR confirmed that it was composed of 88 mol % of 3-hydroxybutyrate and 12 mol % of 3-hydroxyvalerate monomeric subunits. The nanoparticles were fabricated from copolymer and used as a carrier for anticancer drug ellipticine. The in vitro drug release studies showed that % inhibition of A549 cancer cell line receiving ellipticine loaded poly-(3-hydroxybutyrate-co-3-hydroxyvalerate) nanoparticles was two-fold higher in comparison to ellipticine alone. This drug delivery system offers exciting possibilities for cancer therapy by increasing the bioavailability of anti-neoplastic drug to the tumor site.
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Affiliation(s)
- Farha Masood
- Department of Microbiology, Quaid-i-Azam University (QAU), Islamabad, Pakistan.
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Singh M, Kumar P, Patel SKS, Kalia VC. Production of Polyhydroxyalkanoate Co-polymer by Bacillus thuringiensis. Indian J Microbiol 2013; 53:77-83. [PMID: 24426082 PMCID: PMC3587498 DOI: 10.1007/s12088-012-0294-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 07/19/2012] [Indexed: 01/18/2023] Open
Abstract
Integrative processes for the production of bioenergy and biopolymers are gaining importance in recent years as alternatives to fossil fuels and synthetic plastics. In the present study, Bacillus thuringiensis strain EGU45 has been used to generate hydrogen (H2), polyhydroxybutyrate (PHB) and new co-polymers (NP). Under batch culture conditions with 250 ml synthetic media, B. thuringiensis EGU45 produced up to 0.58 mol H2/mol of glucose. Effluent from the H2 production stage was incubated under shaking conditions leading to the production of PHB up to 95 mg/l along with NP of levulinic acid up to 190 mg/l. A twofold to fourfold enhancement in PHB and up to 1.5 fold increase in NP yields was observed on synthetic medium (mixture of M-9+GM-2 medium in 1:1 ratio) containing at 1-2 % glucose concentration. The novelty of this work lies in developing modified physiological conditions, which induce bacterial culture to produce NP.
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Affiliation(s)
- Mamtesh Singh
- />Microbial Biotechnology and Genomics, CSIR-Institute of Genomics and Integrative Biology, Delhi University Campus, Mall Road, Delhi, 110007 India
| | - Prasun Kumar
- />Microbial Biotechnology and Genomics, CSIR-Institute of Genomics and Integrative Biology, Delhi University Campus, Mall Road, Delhi, 110007 India
- />Department of Biotechnology, University of Pune, Pune, 411007 India
| | - Sanjay K. S. Patel
- />Microbial Biotechnology and Genomics, CSIR-Institute of Genomics and Integrative Biology, Delhi University Campus, Mall Road, Delhi, 110007 India
| | - Vipin C. Kalia
- />Microbial Biotechnology and Genomics, CSIR-Institute of Genomics and Integrative Biology, Delhi University Campus, Mall Road, Delhi, 110007 India
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Salgaonkar BB, Mani K, Braganca JM. Characterization of polyhydroxyalkanoates accumulated by a moderately halophilic salt pan isolate Bacillus megaterium strain H16. J Appl Microbiol 2013; 114:1347-56. [PMID: 23311612 DOI: 10.1111/jam.12135] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 12/21/2012] [Accepted: 01/02/2013] [Indexed: 11/28/2022]
Abstract
AIM Characterization of polyhydroxyalkanoates (PHA) accumulated by halophilic bacteria isolated from solar salterns. METHODS AND RESULTS Twenty-six halophilic isolates were obtained from solar salterns of Goa, India. They were screened for accumulation of PHA by Sudan black B, Nile blue A and Nile red stains. Strains H15, H16 and H26 were selected based on their intensity of Nile blue A/Nile red fluorescence. On the basis of phenotypic and genotypic characterization, the three isolates were identified as Bacillus megaterium. Growth kinetics and polymer accumulating capacity of strain H16 were studied in E2 mineral media with 2% glucose with/without NaCl. In the absence of NaCl, strain H16 accumulated PHA to 40·0% (w/w) of cell dry weight (CDW) at 42 h of growth, whereas in presence of 5% w/v NaCl, the culture showed longer lag phase of up to 24 h and accumulated a maximum PHA of 39% (w/w) CDW at 54 h of growth. The infrared spectra of both the polymers exhibited peaks at 1733·9 cm(-1) characteristic of C=O. Scans of (1) H nuclear magnetic resonance (NMR) showed a doublet at 2·5 ppm corresponding to methylene group (-CH(2)), the signal at 5·3 ppm corresponded to methine group (-CH-), and another signal at 1·3 ppm corresponded to the methyl group (-CH(3)). Scans of (13)C NMR showed prominent peaks at 20, 40, 67-68 and 170 ppm, indicating the polymer to be homopolymer of 3-hydroxybutyrates. The polymer is stable up to a temperature of 160°C. CONCLUSION Three moderately halophilic isolates (strain H15, H16 and H26) capable of accumulating PHA were isolated from solar salterns of Ribandar Goa, India, and identified as B. megaterium based on phenotypic and genotypic characterization. Strain H16 accumulated polyhydroxybutyrate in the presence and absence of NaCl up to 40% of its CDW. SIGNIFICANCE AND IMPACT OF THE STUDY This strain would be better suited for production of PHA at industrial level due to its tolerance to high concentration of NaCl.
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Affiliation(s)
- B B Salgaonkar
- Department of Biological Sciences, Birla Institute of Technology and Science Pilani, K K Birla Goa Campus, Zuarinagar, Goa, India
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Proteomic phenotyping of Novosphingobium nitrogenifigens reveals a robust capacity for simultaneous nitrogen fixation, polyhydroxyalkanoate production, and resistance to reactive oxygen species. Appl Environ Microbiol 2012; 78:4802-15. [PMID: 22582058 DOI: 10.1128/aem.00274-12] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Novosphingobium nitrogenifigens Y88(T) (Y88) is a free-living, diazotrophic Alphaproteobacterium, capable of producing 80% of its biomass as the biopolymer polyhydroxybutyrate (PHB). We explored the potential utility of this species as a polyhydroxybutyrate production strain, correlating the effects of glucose, nitrogen availability, dissolved oxygen concentration, and extracellular pH with polyhydroxybutyrate production and changes in the Y88 proteomic profile. Using two-dimensional differential in-gel electrophoresis and tandem mass spectrometry, we identified 217 unique proteins from six growth conditions. We observed reproducible, characteristic proteomic signatures for each of the physiological states we examined. We identified proteins that changed in abundance in correlation with either nitrogen fixation, dissolved oxygen concentration, or acidification of the growth medium. The proteins that correlated with nitrogen fixation were identified either as known nitrogen fixation proteins or as novel proteins that we predict play roles in aspects of nitrogen fixation based on their proteomic profiles. In contrast, the proteins involved in central carbon and polyhydroxybutyrate metabolism were constitutively abundant, consistent with the constitutive polyhydroxybutyrate production that we observed in this species. Three proteins with roles in detoxification of reactive oxygen species were identified in this obligate aerobe. The most abundant protein in all experiments was a polyhydroxyalkanoate granule-associated protein, phasin. The full-length isoform of this protein has a long, intrinsically disordered Ala/Pro/Lys-rich N-terminal segment, a feature that appears to be unique to sphingomonad phasins. The data suggest that Y88 has potential as a PHB production strain due to its aerobic tolerance and metabolic orientation toward polyhydroxybutyrate accumulation, even in low-nitrogen growth medium.
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Tomizawa S, Hyakutake M, Saito Y, Agus J, Mizuno K, Abe H, Tsuge T. Molecular Weight Change of Polyhydroxyalkanoate (PHA) Caused by the PhaC Subunit of PHA Synthase from Bacillus cereus YB-4 in Recombinant Escherichia coli. Biomacromolecules 2011; 12:2660-6. [DOI: 10.1021/bm2004687] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Satoshi Tomizawa
- Department of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Manami Hyakutake
- Department of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Yuta Saito
- Department of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Jumiarti Agus
- Department of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Kouhei Mizuno
- Division of Biochemical Engineering, Department of Materials Science and Chemical Engineering, Kitakyushu National College of Technology, 5-20-1 Shii, Kokuraminami-ku, Kitakyushu 802-0985, Japan
| | - Hideki Abe
- Bioplastic Research Team, RIKEN Biomass Engineering Program, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Takeharu Tsuge
- Department of Innovative and Engineered Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
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Agus J, Kahar P, Hyakutake M, Tomizawa S, Abe H, Tsuge T, Satoh Y, Tajima K. Unusual change in molecular weight of polyhydroxyalkanoate (PHA) during cultivation of PHA-accumulating Escherichia coli. Polym Degrad Stab 2010. [DOI: 10.1016/j.polymdegradstab.2010.09.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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