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Sun H, Shu F, Guan Y, Kong F, Liu S, Liu Y, Li L. Study of anti-fatigue activity of polysaccharide from fruiting bodies of Armillaria gallica. Int J Biol Macromol 2023; 241:124611. [PMID: 37119895 DOI: 10.1016/j.ijbiomac.2023.124611] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 04/12/2023] [Accepted: 04/22/2023] [Indexed: 05/01/2023]
Abstract
Fatigue is a common physiological response that is closely related to energy metabolism. Polysaccharides, as excellent dietary supplements, have been proven to have a variety of pharmacological activities. In this study, A 23.007 kDa polysaccharide from Armillaria gallica (AGP) was purified and performed structural characterization, including analysis of homogeneity, molecular weight and monosaccharide composition. Methylation analysis is used to analyze the glycosidic bond composition of AGP. The mouse model of acute fatigue was used to evaluate the anti-fatigue effect of AGP. AGP-treatment improved exercise endurance in mice and reduced fatigue symptoms caused by acute exercise. AGP regulated the levels of adenosine triphosphate, lactic acid, blood urea nitrogen and lactate dehydrogenase, muscle glycogen and liver glycogen of acute fatigue mice. AGP affected the composition of intestinal microbiota, the changes of some intestinal microorganisms are correlated with fatigue and oxidative stress indicators. Meanwhile, AGP reduced oxidative stress levels, increased antioxidant enzyme activity and regulated the AMP-dependent protein kinase/nuclear factor erythroid 2-related factor 2 signaling pathway. AGP exerted an anti-fatigue effect through modulation of oxidative stress, which is related to intestinal microbiota.
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Affiliation(s)
- Huihui Sun
- Engineering Research Center of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China.
| | - Fang Shu
- Engineering Research Center of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China.
| | - Yue Guan
- Engineering Research Center of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China.
| | - Fange Kong
- Engineering Research Center of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China.
| | - Shuyan Liu
- Engineering Research Center of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China.
| | - Yang Liu
- Engineering Research Center of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China.
| | - Lanzhou Li
- Engineering Research Center of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China.
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Xia Q, Zhao Q, Zhu H, Cao Y, Yang K, Sun P, Cai M. Physicochemical characteristics of Ganoderma lucidum oligosaccharide and its regulatory effect on intestinal flora in vitro fermentation. Food Chem X 2022; 15:100421. [PMID: 36211736 PMCID: PMC9532794 DOI: 10.1016/j.fochx.2022.100421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 08/04/2022] [Accepted: 08/05/2022] [Indexed: 11/01/2022] Open
Abstract
G. lucidum oligosaccharide was obtained by ultrasonic enzymatic hydrolysis and Sephadex G25. GLO was a chain-like homogeneous oligosaccharide with a molecular weight of 1280 Da. GLO could not be easily degraded by digestion in the mouth, gastric and small intestine. GLO could be utilized and had good regulatory effects on intestinal flora.
This study explored the structure characteristics of an oligosaccharide from Ganoderma lucidum (GLO) and its regulatory functions on intestinal flora fermentation in vitro. GLO was extracted by ultrasonic-assisted enzymatic hydrolysis, and purified with a dextran gel column. Digestion properties and intestinal flora regulation effects of GLO were investigated by both simulation models. Results showed that GLO was a chain-like homogeneous oligosaccharide, composed of → 6)-β-d-Glcp-(1→, →4)-α-d-Glcp-(1→, β-d-Glcp-(1→, α-d-Manp-(1 →. Its structure could not be easily degraded by digestion in the mouth, gastric and small intestine. Accordingly, they can be utilized by the intestinal flora in large intestine. By evaluating the gas, short chain fatty acids, pH and flora abundance in vitro fermentation, it indicated that GLO had good regulatory effects on intestinal flora. Accordingly, GLO might be a potential prebiotic applied in functional foods.
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Li G, Wang L, Deng Y, Wei Q. Research progress of the biosynthetic strains and pathways of bacterial cellulose. J Ind Microbiol Biotechnol 2021; 49:6373448. [PMID: 34549273 PMCID: PMC9113090 DOI: 10.1093/jimb/kuab071] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 09/17/2021] [Indexed: 11/14/2022]
Abstract
Bacterial cellulose is a glucose biopolymer produced by microorganisms and widely used as a natural renewable and sustainable resource in the world. However, few bacterial cellulose-producing strains and low yield of cellulose greatly limited the development of bacterial cellulose. In this review, we summarized the 30 cellulose-producing bacteria reported so far, including the physiological functions and the metabolic synthesis mechanism of bacterial cellulose, and the involved three kinds of cellulose synthases (type I, type II, and type III), which are expected to provide a reference for the exploration of new cellulose-producing microbes.
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Affiliation(s)
- Guohui Li
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China.,Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, China
| | - Li Wang
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China.,Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, China
| | - Yu Deng
- National Engineering Laboratory for Cereal Fermentation Technology (NELCF), Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, China.,Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, China
| | - Qufu Wei
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, China
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Wang T, Shen C, Guo F, Zhao Y, Wang J, Sun K, Wang B, Chen Y, Chen Y. Characterization of a polysaccharide from the medicinal lichen, Usnea longissima, and its immunostimulating effect in vivo. Int J Biol Macromol 2021; 181:672-682. [PMID: 33798588 DOI: 10.1016/j.ijbiomac.2021.03.183] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 03/26/2021] [Accepted: 03/26/2021] [Indexed: 12/20/2022]
Abstract
A polysaccharide, CSL-0.1, was isolated from the medicinal lichen, Usnea longissima. CSL-0.1 was a neutral rhamnose-containing glucogalactomannan with a molecular weight of 7.86 × 104 Da. The polysaccharide had a core mannan structure with (1 → 6)-α-d-Manp units as the main chain and was substituted at the O-2 positions with side chains containing (1 → 2)-α-d-Manp residue, [3)-α-Glcp(1 → 4)-α-Glcp(1→] and 6-O-substituted β-d-Galf units. 2-O- and 2,3-di-O-substituted Rhap units. The effects of CSL-0.1 on intestinal immunity and antioxidant activity were evaluated. CSL-0.1 increased the spleen and thymus indices in a dose-dependent manner and conferred immunomodulation on reversing the Th1/Th2-related cytokine imbalance in cyclophosphamide (CP)-induced immunosuppressed mice. CSL-0.1 could also enhance the levels of secretory immunoglobulin A in CP-injected mice. Additionally, the antioxidant levels in the liver and intestine of the mice were increased 20%-50% after intragastric injection by CSL-0.1.
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Affiliation(s)
- Teng Wang
- College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, Zhejiang 316000, China
| | - Chen Shen
- College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, Zhejiang 316000, China
| | - Feng Guo
- College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, Zhejiang 316000, China
| | - Yuqin Zhao
- College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, Zhejiang 316000, China
| | - Jie Wang
- College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, Zhejiang 316000, China
| | - Kunlai Sun
- College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, Zhejiang 316000, China
| | - Bin Wang
- College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, Zhejiang 316000, China
| | - Yan Chen
- College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, Zhejiang 316000, China.
| | - Yin Chen
- College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, Zhejiang 316000, China.
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Consecutive bacterial cellulose production by luffa sponge enmeshed with cellulose microfibrils of Acetobacter xylinum under continuous aeration. 3 Biotech 2021; 11:6. [PMID: 33442505 DOI: 10.1007/s13205-020-02569-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 11/27/2020] [Indexed: 10/22/2022] Open
Abstract
The bacterial cellulose production (BCP) process, using cellulose microfibrils (CM) of Acetobacter xylinum enmeshed on luffa sponge matrices (LSM) as LSM-CM starter, has been successfully developed where the LSM-CM production process can be recycled through consecutive cycles in limited dissolved oxygen (DO) under continuous aeration. In this study, incremental aeration rates impacted the consecutive cycles. Gluconic acid production, during the process, resulting in the reduction of BCP, was increasingly generated at high aeration from 0.28 to 0.34% at 3 L/min to 0.83-0.97% and 1.52-1.99% at 6 and 9 L/min after 7 d culture at 30 ± 2 °C. To compensate for the negative impact of aeration, 0.10 and 0.15% (w/v) carboxymethyl cellulose (CMC) was found to create a microenvironment for recycled LSM-CM at both high aeration (6 and 9 L/min, respectively). Under nine consecutive BCP cycles, acceptable BC yields (from 5.54 ± 0.5 to 5.89 ± 0.5 g/L) were associated with high biomass at 6 L/min aeration. These results confirm that LSM-CM, combined with CMC called as LSM-CM-CMC, created microenvironments low in DO under high aeration rates and that the recycled LSM-CM-CMC with aeration is an alternative, sustainable, economic process that could be applied for mass BCP.
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Li Y, Li S, He S, Yue Y, Ni Y. Structural analysis and antidiabetic activity study of three acidic-type polysaccharides from Crepis crocea (Lam.) Babc. Nat Prod Res 2020; 35:4988-4993. [PMID: 32364012 DOI: 10.1080/14786419.2020.1756805] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
In this article, we analyzed the structures of three acidic hetero-chain polysaccharides (CTP3-B, CTP3-C, and CTP3-D) fractionated from the herb Crepis crocea (Lam.) Babc. by a combination of ethanol precipitation, dialysis and gel permeation chromatography. Three polysaccharides were all highly branched polysaccharide. KK-Ay mice were chosen to determine the hypoglycemic effect of CTP3. The anti-diabetic activity of CTP3 was explored in detail from the aspects of body weight, daily dietary intake, blood glucose level and oral glucose tolerance test (OGTT). It was found that the body weight and daily food intake of the high dose group were significantly decreased compared with the diabetic control group. In addition, there was significant decrease in the levels of blood glucose in the middle and high dose group. These results suggest that CTP3 had a regulative role in blood glucose level. CTP3 may be useful in the treatment of type 2 diabetes mellitus.
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Affiliation(s)
- Yuanyuan Li
- Institute of Chinese Medicine Formulae, Shanxi Institute of Traditional Chinese Medicine, Taiyuan, China
| | - Su Li
- Pharmacy Department, The People's Hospital of Lvliang, Lvliang, China
| | - Shilin He
- Institute of Chinese Medicine Formulae, Shanxi Institute of Traditional Chinese Medicine, Taiyuan, China
| | - Yonghua Yue
- Institute of Chinese Medicine Formulae, Shanxi Institute of Traditional Chinese Medicine, Taiyuan, China
| | - Yan Ni
- Institute of Chinese Medicine Formulae, Shanxi Institute of Traditional Chinese Medicine, Taiyuan, China
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Yun JH, Kim JH, Lee JE. Surface Film Formation in Static-Fermented Rice Vinegar: A Case Study. MYCOBIOLOGY 2019; 47:250-255. [PMID: 31448145 PMCID: PMC6691759 DOI: 10.1080/12298093.2019.1575585] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 11/10/2018] [Accepted: 12/29/2018] [Indexed: 06/10/2023]
Abstract
In the present study, we aimed to determine the cause of surface film formation in three rice vinegars fermented using the traditional static fermentation method. The pH and total acidity of vinegar were 3.0-3.3 and 3.0-8.7%, respectively, and acetic acid was the predominant organic acid present. Colonies showing a clear halo on GYC medium were isolated from the surface film of all vinegars. Via 16S rDNA sequencing, all of the isolates were identified as Acetobacter pasteurianus. Furthermore, field-emission scanning electron microscopy analysis showed that the bacterial cells had a rough surface, were rod-shaped, and were ∼1 × 2 µm in size. Interestingly, cells of the isolate from one of the vinegars were surrounded with an extremely fine threadlike structure. Thus, our results suggest that formation of the surface film in rice vinegar was attributable not to external contamination, to the production of bacterial cellulose by A. pasteurianus to withstand the high concentrations of acetic acid generated during fermentation. However, because of the formation of a surface film in vinegar is undesirable from an industrial perspective, further studies should focus on devising a modified fermentation process to prevent surface film formation and consequent quality degradation.
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Affiliation(s)
- Jeong Hyun Yun
- Department of Food Biotechnology, Korea University of Science and Technology, Daejeon, Republic of Korea
| | - Jae Ho Kim
- Research Group of Traditional Food, Korea Food Research Institute, Jeollabukdo, Republic of Korea
| | - Jang-Eun Lee
- Department of Food Biotechnology, Korea University of Science and Technology, Daejeon, Republic of Korea
- Research Group of Traditional Food, Korea Food Research Institute, Jeollabukdo, Republic of Korea
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Structure and inflammatory activity of the LPS isolated from Acetobacter pasteurianus CIP103108. Int J Biol Macromol 2018; 119:1027-1035. [PMID: 30098357 DOI: 10.1016/j.ijbiomac.2018.08.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 08/06/2018] [Accepted: 08/07/2018] [Indexed: 12/30/2022]
Abstract
Acetobacter pasteurianus is an acetic acid-producing Gram-negative bacterium commonly found associated with plants and plant products and widely used in the production of fermented foods, such as kefir and vinegar. Due to the acid conditions of the bacterium living habitat, uncommon structural features composing its cell envelope are expected. In the present work we have investigated the A. pasteurianus CIP103108 lipopolysaccharide (LPS) structure and immunoactivity. The structure of the lipid A and of two different O-polysaccharides was assessed. Furthermore, immunological studies with human cells showed a low immunostimulant activity of the isolated LPS, in addition to a slight capability to lower the NF-kB activation upon stimulation by toxic LPS.
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Brandt JU, Born FL, Jakob F, Vogel RF. Environmentally triggered genomic plasticity and capsular polysaccharide formation are involved in increased ethanol and acetic acid tolerance in Kozakia baliensis NBRC 16680. BMC Microbiol 2017; 17:172. [PMID: 28797225 PMCID: PMC5553594 DOI: 10.1186/s12866-017-1070-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 07/10/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Kozakia baliensis NBRC 16680 secretes a gum-cluster derived heteropolysaccharide and forms a surface pellicle composed of polysaccharides during static cultivation. Furthermore, this strain exhibits two colony types on agar plates; smooth wild-type (S) and rough mutant colonies (R). This switch is caused by a spontaneous transposon insertion into the gumD gene of the gum-cluster, resulting in a heteropolysaccharide secretion deficient, rough phenotype. To elucidate, whether this is a directed switch triggered by environmental factors, we checked the number of R and S colonies under different growth conditions including ethanol and acetic acid supplementation. Furthermore, we investigated the tolerance of R and S strains against ethanol and acetic acid in shaking and static growth experiments. To get new insights into the composition and function of the pellicle polysaccharide, the polE gene of the R strain was additionally deleted, as it was reported to be involved in pellicle formation in other acetic acid bacteria. RESULTS The number of R colonies was significantly increased upon growth on acetic acid and especially ethanol. The morphological change from K. baliensis NBRC 16680 S to R strain was accompanied by changes in the sugar contents of the produced pellicle EPS. The R:ΔpolE mutant strain was not able to form a regular pellicle anymore, but secreted an EPS into the medium, which exhibited a similar sugar monomer composition as the pellicle polysaccharide isolated from the R strain. The R strain had a markedly increased tolerance towards acetic acid and ethanol compared to the other NBRC 16680 strains (S, R:ΔpolE). A relatively high intrinsic acetic acid tolerance was also observable for K. baliensis DSM 14400T, which might indicate diverse adaptation mechanisms of different K. baliensis strains in altering natural habitats. CONCLUSION The results suggest that the genetically triggered R phenotype formation is directly related to increased acetic acid and ethanol tolerance. The polE gene turned out to be involved in the formation of a cell-associated, capsular polysaccharide, which seems to be essential for increased ethanol/acetic tolerance in contrast to the secreted gum-cluster derived heteropolysaccharide. The genetic and morphological switch could represent an adaptive evolutionary step during the development of K. baliensis NBRC 16680 in course of changing environmental conditions.
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Affiliation(s)
- Julia U Brandt
- Technische Universität München, Lehrstuhl für Technische Mikrobiologie, Gregor-Mendel-Straße 4, 85354, Freising, Germany
| | - Friederike-Leonie Born
- Technische Universität München, Lehrstuhl für Technische Mikrobiologie, Gregor-Mendel-Straße 4, 85354, Freising, Germany
| | - Frank Jakob
- Technische Universität München, Lehrstuhl für Technische Mikrobiologie, Gregor-Mendel-Straße 4, 85354, Freising, Germany.
| | - Rudi F Vogel
- Technische Universität München, Lehrstuhl für Technische Mikrobiologie, Gregor-Mendel-Straße 4, 85354, Freising, Germany
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Krusong W, Kerdpiboon S, Pornpukdeewattana S, Jindaprasert A. Luffa sponge offsets the negative effects of aeration on bacterial cellulose production. J Appl Microbiol 2016; 121:1665-1672. [PMID: 27611470 DOI: 10.1111/jam.13290] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 08/26/2016] [Accepted: 08/31/2016] [Indexed: 11/26/2022]
Abstract
AIMS To offset the negative effects of aeration on bacterial cellulose (BC) production by acetic acid bacteria using enmeshed cellulose microfibrils (CM) on luffa sponge matrices (LSM). METHODS AND RESULTS The CM were enmeshed on LSM (LSM-CM). The optimal amount of LSM-CM was determined for BC production under aerated conditions. Without LSM-CM, no BC was produced in seven out of nine production cycles at the highest aeration rate (9 l min-1 ). However, with 0·5% LSM-CM and an aeration rate of 3 l min-1 , a satisfactory oxygen transfer coefficient was achieved, and also a good yield of BC (5·24 g l-1 ). Moreover, the LSM-CM was able to be recycled through nine consecutive BC production cycles. The highest BC yields (from 5·8 ± 0·4 to 6·6 ± 0·4 g l-1 ) were associated with high bacterial biomass and this was confirmed by scanning electron microscopy. CONCLUSIONS We confirm that LSM-CM works well as a starter. Microenvironments low in dissolved oxygen within the matrices of LSM-CM are important for BC production under aeration conditions. SIGNIFICANCE AND IMPACT OF THE STUDY The LSM-CM provides a microenvironment which offsets the negative effects of aeration on BC production. A sustainable, economic process for mass BC production is described using recycled LSM-CM with aeration.
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Affiliation(s)
- W Krusong
- Fermentation Technology Division, Faculty of Agro-Industry, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand
| | - S Kerdpiboon
- Food Science Division, Faculty of Agro-Industry, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand
| | - S Pornpukdeewattana
- Fermentation Technology Division, Faculty of Agro-Industry, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand
| | - A Jindaprasert
- Fermentation Technology Division, Faculty of Agro-Industry, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand
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Saichana N, Matsushita K, Adachi O, Frébort I, Frebortova J. Acetic acid bacteria: A group of bacteria with versatile biotechnological applications. Biotechnol Adv 2015; 33:1260-71. [DOI: 10.1016/j.biotechadv.2014.12.001] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Revised: 11/26/2014] [Accepted: 12/01/2014] [Indexed: 10/24/2022]
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Valera MJ, Torija MJ, Mas A, Mateo E. Cellulose production and cellulose synthase gene detection in acetic acid bacteria. Appl Microbiol Biotechnol 2014; 99:1349-61. [DOI: 10.1007/s00253-014-6198-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 10/24/2014] [Accepted: 10/27/2014] [Indexed: 02/07/2023]
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Watanabe T, Toyama H. Pellicle of thermotolerant Acetobacter pasteurianus strains: Characterization of the polysaccharides and of the induction patterns. J Biosci Bioeng 2014; 118:134-8. [DOI: 10.1016/j.jbiosc.2014.01.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 01/16/2014] [Accepted: 01/16/2014] [Indexed: 10/25/2022]
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Illeghems K, De Vuyst L, Weckx S. Complete genome sequence and comparative analysis of Acetobacter pasteurianus 386B, a strain well-adapted to the cocoa bean fermentation ecosystem. BMC Genomics 2013; 14:526. [PMID: 23902333 PMCID: PMC3751514 DOI: 10.1186/1471-2164-14-526] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 07/27/2013] [Indexed: 01/21/2023] Open
Abstract
Background Acetobacter pasteurianus 386B, an acetic acid bacterium originating from a spontaneous cocoa bean heap fermentation, proved to be an ideal functional starter culture for coca bean fermentations. It is able to dominate the fermentation process, thereby resisting high acetic acid concentrations and temperatures. However, the molecular mechanisms underlying its metabolic capabilities and niche adaptations are unknown. In this study, whole-genome sequencing and comparative genome analysis was used to investigate this strain’s mechanisms to dominate the cocoa bean fermentation process. Results The genome sequence of A. pasteurianus 386B is composed of a 2.8-Mb chromosome and seven plasmids. The annotation of 2875 protein-coding sequences revealed important characteristics, including several metabolic pathways, the occurrence of strain-specific genes such as an endopolygalacturonase, and the presence of mechanisms involved in tolerance towards various stress conditions. Furthermore, the low number of transposases in the genome and the absence of complete phage genomes indicate that this strain might be more genetically stable compared with other A. pasteurianus strains, which is an important advantage for the use of this strain as a functional starter culture. Comparative genome analysis with other members of the Acetobacteraceae confirmed the functional properties of A. pasteurianus 386B, such as its thermotolerant nature and unique genetic composition. Conclusions Genome analysis of A. pasteurianus 386B provided detailed insights into the underlying mechanisms of its metabolic features, niche adaptations, and tolerance towards stress conditions. Combination of these data with previous experimental knowledge enabled an integrated, global overview of the functional characteristics of this strain. This knowledge will enable improved fermentation strategies and selection of appropriate acetic acid bacteria strains as functional starter culture for cocoa bean fermentation processes.
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Affiliation(s)
- Koen Illeghems
- Research Group of Industrial Microbiology and Food Biotechnology, IMDO, Faculty of Sciences and Bio-engineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, Brussels B-1050, Belgium.
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Rana V, Kumar V, Soni P. Structural characterization of an acidic polysaccharide from Dalbergia sissoo Roxb. leaves. Carbohydr Polym 2012; 90:243-50. [DOI: 10.1016/j.carbpol.2012.05.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2012] [Revised: 05/05/2012] [Accepted: 05/07/2012] [Indexed: 10/28/2022]
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