1
|
Jiang W, Cai Y, Sun S, Wang W, Tišma M, Baganz F, Hao J. Inactivation of hydrogenase-3 leads to enhancement of 1,3-propanediol and 2,3-butanediol production by Klebsiella pneumoniae. Enzyme Microb Technol 2024; 177:110438. [PMID: 38518554 DOI: 10.1016/j.enzmictec.2024.110438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 03/16/2024] [Accepted: 03/17/2024] [Indexed: 03/24/2024]
Abstract
Klebsiella pneumoniae can use glucose or glycerol as carbon sources to produce 1,3-propanediol or 2,3-butanediol, respectively. In the metabolism of Klebsiella pneumoniae, hydrogenase-3 is responsible for H2 production from formic acid, but it is not directly related to the synthesis pathways for 1,3-propanediol and 2,3-butanediol. In the first part of this research, hycEFG, which encodes subunits of the enzyme hydrogenase-3, was knocked out, so K. pneumoniae ΔhycEFG lost the ability to produce H2 during cultivation using glycerol as a carbon source. As a consequence, the concentration of 1,3-propanediol increased and the substrate (glycerol) conversion ratio reached 0.587 mol/mol. Then, K. pneumoniae ΔldhAΔhycEFG was constructed to erase lactic acid synthesis which led to the further increase of 1,3-propanediol concentration. A substrate (glycerol) conversion ratio of 0.628 mol/mol in batch conditions was achieved, which was higher compared to the wild type strain (0.545 mol/mol). Furthermore, since adhE encodes an alcohol dehydrogenase that catalyzes ethanol production from acetaldehyde, K. pneumoniae ΔldhAΔadhEΔhycEFG was constructed to prevent ethanol production. Contrary to expectations, this did not lead to a further increase, but to a decrease in 1,3-propanediol production. In the second part of this research, glucose was used as the carbon source to produce 2,3-butanediol. Knocking out hycEFG had distinct positive effect on 2,3-butanediol production. Especially in K. pneumoniae ΔldhAΔadhEΔhycEFG, a substrate (glucose) conversion ratio of 0.730 mol/mol was reached, which is higher compared to wild type strain (0.504 mol/mol). This work suggests that the inactivation of hydrogenase-3 may have a global effect on the metabolic regulation of K. pneumoniae, leading to the improvement of the production of two industrially important bulk chemicals, 1,3-propanediol and 2,3-butanediol.
Collapse
Affiliation(s)
- Weiyan Jiang
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yaoyu Cai
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Shaoqi Sun
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Wenqi Wang
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Marina Tišma
- Josip Juraj Strossmayer University of Osijek, Faculty of Food Technology Osijek, Franje Kuhača 18, Osijek HR-31000, Croatia
| | - Frank Baganz
- Department of Biochemical Engineering, University College London, Gordon Street, London WC1H 0AH, UK
| | - Jian Hao
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 99 Haike Road, Pudong, Shanghai 201210, PR China; Department of Biochemical Engineering, University College London, Gordon Street, London WC1H 0AH, UK; University of Chinese Academy of Sciences, Beijing 100049, PR China.
| |
Collapse
|
2
|
Jonnalagadda D, Kihara Y, Groves A, Ray M, Saha A, Ellington C, Lee-Okada HC, Furihata T, Yokomizo T, Quadros EV, Rivera R, Chun J. FTY720 requires vitamin B 12-TCN2-CD320 signaling in astrocytes to reduce disease in an animal model of multiple sclerosis. Cell Rep 2023; 42:113545. [PMID: 38064339 PMCID: PMC11066976 DOI: 10.1016/j.celrep.2023.113545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 10/24/2023] [Accepted: 11/20/2023] [Indexed: 12/30/2023] Open
Abstract
Vitamin B12 (B12) deficiency causes neurological manifestations resembling multiple sclerosis (MS); however, a molecular explanation for the similarity is unknown. FTY720 (fingolimod) is a sphingosine 1-phosphate (S1P) receptor modulator and sphingosine analog approved for MS therapy that can functionally antagonize S1P1. Here, we report that FTY720 suppresses neuroinflammation by functionally and physically regulating the B12 pathways. Genetic and pharmacological S1P1 inhibition upregulates a transcobalamin 2 (TCN2)-B12 receptor, CD320, in immediate-early astrocytes (ieAstrocytes; a c-Fos-activated astrocyte subset that tracks with experimental autoimmune encephalomyelitis [EAE] severity). CD320 is also reduced in MS plaques. Deficiency of CD320 or dietary B12 restriction worsens EAE and eliminates FTY720's efficacy while concomitantly downregulating type I interferon signaling. TCN2 functions as a chaperone for FTY720 and sphingosine, whose complex induces astrocytic CD320 internalization, suggesting a delivery mechanism of FTY720/sphingosine via the TCN2-CD320 pathway. Taken together, the B12-TCN2-CD320 pathway is essential for the mechanism of action of FTY720.
Collapse
Affiliation(s)
- Deepa Jonnalagadda
- Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Yasuyuki Kihara
- Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA.
| | - Aran Groves
- Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA; Neuroscience Graduate Program, School of Medicine, University of California San Diego, 9500 Gilman Dr, La Jolla, CA 92093, USA
| | - Manisha Ray
- Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Arjun Saha
- Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA
| | - Clayton Ellington
- Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Hyeon-Cheol Lee-Okada
- Department of Biochemistry, Graduate School of Medicine, Juntendo University, Hongo 2-1-1, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Tomomi Furihata
- Laboratory of Clinical Pharmacy and Experimental Therapeutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Takehiko Yokomizo
- Department of Biochemistry, Graduate School of Medicine, Juntendo University, Hongo 2-1-1, Bunkyo-ku, Tokyo 113-8421, Japan
| | - Edward V Quadros
- Department of Medicine, SUNY-Downstate Medical Center, 450 Clarkson Avenue, Brooklyn, NY 11203, USA
| | - Richard Rivera
- Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Jerold Chun
- Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA.
| |
Collapse
|
3
|
Lyu T, Williams R, Exton B, Grabowski RC. Assessing the efficacy and mechanisms of glycol-contaminated water treatment through floating treatment wetlands. Water Sci Technol 2023; 88:2751-2761. [PMID: 38096066 PMCID: wst_2023_389 DOI: 10.2166/wst.2023.389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
The growing concerns surrounding water pollution and the degradation of ecosystems worldwide have led to an increased use of nature-based solutions (NbSs). This study assessed the feasibility of using floating treatment wetlands (FTWs) as an NbS to treat propylene glycol-contaminated water and quantitatively investigated different removal pathways. With an environmentally relevant concentration of propylene glycol (1,250 mg/L), FTWs containing Acorus calamus and mixed species demonstrated the highest average glycol mass removal efficacy (99%), followed by Carex acutiformis (98%), Juncus effusus (93%), and the control group without plants (10%) after 1 week. Additional mesocosm-scale experiments with varying FTW configurations, including surface coverage to reduce evaporation and photodegradation processes, and the addition of antibiotics to inhibit microbial activity, were conducted to quantify glycol removal pathways. Mass balance analysis results revealed that microbial biodegradation (33.3-39.7%) and plant uptake (37.9-45.2%) were the primary pathways for glycol removal. Only 15.5-19.5% of the glycol removal via evaporation and photodegradation was accounted in this study, which may be attributed to the mesocosm experimental setup (static water and no wind). Aligned with the broader discussion regarding biodiversity improvements and carbon storage capacity, this study demonstrated that FTWs are an environmentally friendly and effective NbS for addressing glycol-contaminated water.
Collapse
Affiliation(s)
- Tao Lyu
- School of Water, Energy and Environment, Cranfield University, College Road, Cranfield, Bedfordshire MK43 0AL, United Kingdom E-mail:
| | - Randy Williams
- School of Water, Energy and Environment, Cranfield University, College Road, Cranfield, Bedfordshire MK43 0AL, United Kingdom
| | - Benjamin Exton
- School of Water, Energy and Environment, Cranfield University, College Road, Cranfield, Bedfordshire MK43 0AL, United Kingdom
| | - Robert C Grabowski
- School of Water, Energy and Environment, Cranfield University, College Road, Cranfield, Bedfordshire MK43 0AL, United Kingdom
| |
Collapse
|
4
|
Zhang Y, Yun J, Zabed HM, Dou Y, Zhang G, Zhao M, Taherzadeh MJ, Ragauskas A, Qi X. High-level co-production of 3-hydroxypropionic acid and 1,3-propanediol from glycerol: Metabolic engineering and process optimization. Bioresour Technol 2023; 369:128438. [PMID: 36470488 DOI: 10.1016/j.biortech.2022.128438] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
3-Hydroxypropionic acid (3-HP) and 1,3-propanediol (1,3-PDO) are value-added chemicals with versatile applications in the chemical, pharmaceutical, and food industries. Nevertheless, sustainable production of 3-HP and 1,3-PDO is often limited by the lack of efficient strains and suitable fermentation configurations. Herein, attempts have been made to improve the co-production of both metabolites through metabolic engineering of Escherichia coli and process optimization. First, the 3-HP and 1,3-PDO co-biosynthetic pathways were recruited and optimized in E. coli, followed by coupling the pathways to the transhydrogenase-mediated cofactor regeneration systems that increased cofactor availability and product synthesis. Next, pathway rebalancing and block of by-product formation significantly improved 3-HP and 1,3-PDO net titer. Subsequently, glycerol flux toward 3-HP and 1,3-PDO synthesis was maximized by removing metabolic repression and fine-tuning the glycerol oxidation pathway. Lastly, the combined fermentation process optimization and two-stage pH-controlled fed-batch fermentation co-produced 140.50 g/L 3-HP and 1,3-PDO, with 0.85 mol/mol net yield.
Collapse
Affiliation(s)
- Yufei Zhang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, PR China
| | - Junhua Yun
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, PR China
| | - Hossain M Zabed
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, PR China
| | - Yuan Dou
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, PR China
| | - Guoyan Zhang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, PR China
| | - Mei Zhao
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, PR China
| | | | - Arthur Ragauskas
- Department of Chemical and Biomolecular Engineering, The University of Tennessee, Knoxville, TN 37996, USA; Joint Institute for Biological Sciences, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA; Center for Renewable Carbon, Department of Forestry, Wildlife and Fisheries, The University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Xianghui Qi
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, PR China.
| |
Collapse
|
5
|
Yakan A, Özkan H, Kaya U, Keçeli HH, Dalkiran S, Karaaslan I, Ünal N, Akçay A, Arslan K, Akyüz B, Güngör G, Çamdeviren B, Küçükoflaz M, Sariözkan S, Özbeyaz C. Effects of propylene glycol used at different doses in Akkaraman lambs rations on metabolism-related parameters and liver gene and protein expression during different feeding periods. Anim Sci J 2023; 94:e13886. [PMID: 37963598 DOI: 10.1111/asj.13886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 09/11/2023] [Accepted: 10/06/2023] [Indexed: 11/16/2023]
Abstract
This study aimed to investigate the metabolic effects of propylene glycol (PG) over 60, 90, and 120 days in lambs. Seventy-two weaned male lambs were allocated into three groups: control (Con), PG1.5 (1.5 mL/kg live weight0.75 ), and PG3 (3 mL/kg live weight0.75 ). Blood samples were collected at the beginning and slaughter days. Biochemical parameters (glucose, triglycerides, ALT, AST, LDH, BUN, and insulin) and gene and protein levels of peroxisome proliferator activated receptor gamma (PPARγ), diacylglycerol o-acyltransferase 1 (DGAT1), carbohydrate responsive element binding protein (ChREBP), and sterol regulatory element binding transcription factor 1c (SREBP-1c) in the liver were determined. Glucose in PG1.5 was increased on Day 60, while significant differences were observed in biochemical parameters except for insulin on the 60, 90, and 120 days. Biochemical parameters such as ALT, AST, LDH, and BUN increased over time, while triglycerides decreased. DGAT1 gene and protein levels were lower, while SREBP-1c and PPARγ were higher in PG groups on Day 60. While SREBP-1c was lower in PG1.5, ChREBP was higher in PG3 on Day 90. PPARγ, DGAT1, and ChREBP were upregulated in PG3 on Day 120. Positive correlations were found between proteins. The long-term use of PG in lambs did not have detrimental effects on metabolism. The study provides valuable insights into the molecular mechanisms underlying the metabolic effects of PG in lambs, shedding light on its potential applications in lamb production.
Collapse
Affiliation(s)
- Akın Yakan
- Faculty of Veterinary Medicine, Department of Genetics, Hatay Mustafa Kemal University, Antakya, Hatay, Turkiye
| | - Hüseyin Özkan
- Faculty of Veterinary Medicine, Department of Genetics, Hatay Mustafa Kemal University, Antakya, Hatay, Turkiye
| | - Ufuk Kaya
- Faculty of Veterinary Medicine, Department of Biostatistics, Hatay Mustafa Kemal University, Antakya, Hatay, Turkiye
| | - Hasan Hüseyin Keçeli
- Faculty of Veterinary Medicine, Department of Genetics, Hatay Mustafa Kemal University, Antakya, Hatay, Turkiye
| | - Sevda Dalkiran
- Institute of Health Sciences, Department of Molecular Biochemistry and Genetics, Hatay Mustafa Kemal University, Antakya, Hatay, Turkiye
| | - Irem Karaaslan
- Technology and Research & Development Center (MARGEM), Hatay Mustafa Kemal University, Antakya, Hatay, Turkiye
| | - Necmettin Ünal
- Faculty of Veterinary Medicine, Department of Animal Science, Ankara University, Ankara, Turkiye
| | - Aytaç Akçay
- Faculty of Veterinary Medicine, Department of Biostatistics, Ankara University, Ankara, Turkiye
| | - Korhan Arslan
- Faculty of Veterinary Medicine, Department of Genetics, Erciyes University, Kayseri, Turkiye
| | - Bilal Akyüz
- Faculty of Veterinary Medicine, Department of Genetics, Erciyes University, Kayseri, Turkiye
| | - Güven Güngör
- Faculty of Veterinary Medicine, Department of Biostatistics, Erciyes University, Kayseri, Turkiye
| | - Baran Çamdeviren
- Institute of Health Sciences, Department of Molecular Biochemistry and Genetics, Hatay Mustafa Kemal University, Antakya, Hatay, Turkiye
| | - Mehmet Küçükoflaz
- Faculty of Veterinary Medicine, Department of Animal Health Economics and Management, Kafkas University, Kars, Turkiye
| | - Savaş Sariözkan
- Faculty of Veterinary Medicine, Department of Animal Health Economics and Management, Erciyes University, Kayseri, Turkiye
| | - Ceyhan Özbeyaz
- Faculty of Veterinary Medicine, Department of Animal Science, Ankara University, Ankara, Turkiye
| |
Collapse
|
6
|
Le HTQ, Lee EY. Insights into C1 and C3 assimilation pathways in type I methanotrophic bacterium from co-production of 1,2-propanediol and lactate. Bioresour Technol 2022; 365:128172. [PMID: 36279980 DOI: 10.1016/j.biortech.2022.128172] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/15/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
Methanotrophic bacteria are attractive hosts for mining metabolic pathways of C1 assimilation to produce value-added products. Herein, the type I methanotroph Methylotuvimicrobium alcaliphilum 20Z was employed to explore the carbon flux from methane and methanol via the EMP pathway to produce 1,2-propanediol (1,2-PDO). The production of 1,2-PDO on methane was found to be mainly restricted by the lower carbon flux toward the EMP pathway. The co-utilization of C1 substrates and glycerol (C3) could contribute to enhance 1,2-PDO. Lactate was co-produced in much higher amounts than 1,2-PDO. This unexpected product was probably derived from lactaldehyde by inherent aldehyde dehydrogenases. The 1,2-PDO production without increased accumulation of lactate was observed via establishing the acetol-based pathway by propane utilization with the overexpression of pmoD. This is the first study to provide experimental insights into the operation of metabolic routes for 1,2-PDO and lactate co-production from C1 and C3 compounds in methanotrophs.
Collapse
Affiliation(s)
- Hoa Thi Quynh Le
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin 17104, Republic of Korea
| | - Eun Yeol Lee
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin 17104, Republic of Korea.
| |
Collapse
|
7
|
Dong S, Liu X, Chen T, Zhou X, Li S, Fu S, Gong H. Mutation of rpoS is Beneficial for Suppressing Organic Acid Secretion During 1,3-Propandiol Biosynthesis in Klebsiella pneumoniae. Curr Microbiol 2022; 79:218. [PMID: 35704098 DOI: 10.1007/s00284-022-02901-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 05/09/2022] [Indexed: 11/25/2022]
Abstract
In this study, to reduce the formation of organic acid during 1,3-propanediol biosynthesis in Klebsiella pneumoniae, a method combining UV mutagenesis and high-throughput screening with pH color plates was employed to obtain K. pneumoniae mutants. When compared with the parent strain, the total organic acid formation by the mutant decreased, whereas 1,3-propanediol biosynthesis increased after 24 h anaerobic shake flask culture. Subsequently, genetic changes in the mutant were analyzed by whole-genome sequencing and verified by signal gene deletion. Mutation of the rpoS gene was confirmed to contribute to the regulation of organic acid synthesis in K. pneumoniae. Besides, rpoS deletion eliminated the formation of 2,3-butanediol, the main byproduct produced during 1,3-propanediol fermentation, indicating the role of rpoS in metabolic regulation in K. pneumoniae. Thus, a K. pneumoniae mutant was developed, which could produce lower organic acid during 1,3-propanediol fermentation due to an rpoS mutation in this study.
Collapse
Affiliation(s)
- Shufan Dong
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China
| | - Xuxia Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China
| | - Tianyu Chen
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China
| | - Xiaoqin Zhou
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China
| | - Shengming Li
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China
| | - Shuilin Fu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China
| | - Heng Gong
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China.
| |
Collapse
|
8
|
Abstract
Pluronic polymers (pluronics) are a unique class of synthetic triblock copolymers containing hydrophobic polypropylene oxide (PPO) and hydrophilic polyethylene oxide (PEO) arranged in the PEO-PPO-PEO manner. Due to their excellent biocompatibility and amphiphilic properties, pluronics are an ideal and promising biological material, which is widely used in drug delivery, disease diagnosis, and treatment, among other applications. Through self-assembly or in combination with other materials, pluronics can form nano carriers with different morphologies, representing a kind of multifunctional pharmaceutical excipients. In recent years, the utilization of pluronic-based multi-functional drug carriers in tumor treatment has become widespread, and various responsive drug carriers are designed according to the characteristics of the tumor microenvironment, resulting in major progress in tumor therapy. This review introduces the specific role of pluronic-based polymer drug delivery systems in tumor therapy, focusing on their physical and chemical properties as well as the design aspects of pluronic polymers. Finally, using newer literature reports, this review provides insights into the future potential and challenges posed by different pluronic-based polymer drug delivery systems in tumor therapy.
Collapse
Affiliation(s)
- Jialin Yu
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China; (J.Y.); (H.Q.); (S.Y.)
| | - Huayu Qiu
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China; (J.Y.); (H.Q.); (S.Y.)
- Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 311121, China
| | - Shouchun Yin
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China; (J.Y.); (H.Q.); (S.Y.)
| | - Hebin Wang
- College of Chemical Engineering and Technology, Tianshui Normal University, Tianshui 741099, China
| | - Yang Li
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China; (J.Y.); (H.Q.); (S.Y.)
| |
Collapse
|
9
|
Abstract
3-Hydroxypropionic acid (3HP), an important three carbon (C3) chemical, is designated as one of the top platform chemicals with an urgent need for improved industrial production. Halomonas bluephagenesis shows the potential as a chassis for competitive bioproduction of various chemicals due to its ability to grow under an open, unsterile and continuous process. Here, we report the strategy for producing 3HP and its copolymer poly(3-hydroxybutyrate-co-3-hydroxypropionate) (P3HB3HP) by the development of H. bluephagenesis. The transcriptome analysis reveals its 3HP degradation and synthesis pathways involving endogenous synthetic enzymes from 1,3-propanediol. Combing the optimized expression of aldehyde dehydrogenase (AldDHb), an engineered H. bluephagenesis strain of whose 3HP degradation pathway is deleted and that overexpresses alcohol dehydrogenases (AdhP) on its genome under a balanced redox state, is constructed with an enhanced 1.3-propanediol-dependent 3HP biosynthetic pathway to produce 154 g L-1 of 3HP with a yield and productivity of 0.93 g g-1 1,3-propanediol and 2.4 g L-1 h-1, respectively. Moreover, the strain could also accumulate 60% poly(3-hydroxybutyrate-co-32-45% 3-hydroxypropionate) in the dry cell mass, demonstrating to be a suitable chassis for hyperproduction of 3HP and P3HB3HP.
Collapse
Affiliation(s)
- Xiao-Ran Jiang
- Department of Microbiology, Army Medical University, Chongqing, China
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Xu Yan
- School of Life Sciences, Tsinghua University, Beijing, China
- Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing, China
| | - Lin-Ping Yu
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Xin-Yi Liu
- School of Life Sciences, Tsinghua University, Beijing, China
- Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing, China
| | - Guo-Qiang Chen
- School of Life Sciences, Tsinghua University, Beijing, China.
- Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing, China.
- MOE Key Lab for Industrial Biocatalysis, Department of Chemical Engineering, Tsinghua University, Beijing, China.
| |
Collapse
|
10
|
Mitrea L, Leopold LF, Bouari C, Vodnar DC. Separation and Purification of Biogenic 1,3-Propanediol from Fermented Glycerol through Flocculation and Strong Acidic Ion-Exchange Resin. Biomolecules 2020; 10:biom10121601. [PMID: 33256040 PMCID: PMC7760240 DOI: 10.3390/biom10121601] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/13/2020] [Accepted: 11/25/2020] [Indexed: 02/07/2023] Open
Abstract
In the present work, was investigated the separation and purification procedure of the biogenic 1,3-propanediol (1,3-PD), which is a well-known valuable compound in terms of bio-based plastic materials development. The biogenic 1,3-PD was obtained as a major metabolite through the glycerol fermentation by Klebsiella pneumoniae DSMZ 2026 and was subjected to separation and purification processes. A strong acidic ion exchange resin in H+ form was used for 1,3-PD purification from the aqueous solution previously obtained by broth flocculation. The eluent volume was investigated considering the removal of the secondary metabolites such as organic acids (acetic, citric, lactic, and succinic acids) and 2,3-butanediol (2,3-BD), and unconsumed glycerol. It was observed that a volume of 84 mL of ethanol 75% loaded with a flow rate of 7 mL/min completely remove the secondary metabolites from 10 mL of concentrated fermented broth, and pure biogenic 1,3-PD was recovered in 128 mL of the eluent.
Collapse
Affiliation(s)
- Laura Mitrea
- Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Calea Mănăștur 3–5, 400372 Cluj-Napoca, Romania;
| | - Loredana Florina Leopold
- Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Calea Mănăştur 3–5, 400372 Cluj-Napoca, Romania;
| | - Cosmina Bouari
- Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Calea Mănăștur 3–5, 400372 Cluj-Napoca, Romania
- Correspondence: (C.B.); (D.C.V.); Tel.: +40-7427-36-657 (C.B.); +40-7473-41-881 (D.C.V.)
| | - Dan Cristian Vodnar
- Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Calea Mănăștur 3–5, 400372 Cluj-Napoca, Romania;
- Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Calea Mănăştur 3–5, 400372 Cluj-Napoca, Romania;
- Correspondence: (C.B.); (D.C.V.); Tel.: +40-7427-36-657 (C.B.); +40-7473-41-881 (D.C.V.)
| |
Collapse
|
11
|
Xu D, Jia Z, Zhang L, Fu S, Gong H. Analysis of the Growth and Metabolites of a Pyruvate Dehydrogenase Complex- Deficient Klebsiella pneumoniae Mutant in a Glycerol-Based Medium. J Microbiol Biotechnol 2020; 30:753-761. [PMID: 32482942 PMCID: PMC9728353 DOI: 10.4014/jmb.1801.01045] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 05/01/2018] [Indexed: 12/15/2022]
Abstract
To determine the role of pyruvate dehydrogenase complex (PDHC) in Klebsiella pneumoniae, the growth and metabolism of PDHC-deficient mutant in glycerol-based medium were analyzed and compared with those of other strains. Under aerobic conditions, the PDHC activity was fourfold higher than that of pyruvate formate lyase (PFL), and blocking of PDHC caused severe growth defect and pyruvate accumulation, indicating that the carbon flux through pyruvate to acetyl coenzyme A mainly depended on PDHC. Under anaerobic conditions, although the PDHC activity was only 50% of that of PFL, blocking of PDHC resulted in more growth defect than blocking of PFL. Subsequently, combined with the requirement of CO2 and intracellular redox status, it was presumed that the critical role of PDHC was to provide NADH for the anaerobic growth of K. pneumoniae. This presumption was confirmed in the PDHC-deficient mutant by further blocking one of the formate dehydrogenases, FdnGHI. Besides, based on our data, it can also be suggested that an improvement in the carbon flux in the PFL-deficient mutant could be an effective strategy to construct highyielding 1,3-propanediol-producing K. pneumoniae strain.
Collapse
Affiliation(s)
- Danfeng Xu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Zongxiao Jia
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Lijuan Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Shuilin Fu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Heng Gong
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| |
Collapse
|
12
|
Nan J, Zhang S, Zhan P, Jiang L. Evaluation of Bronopol and Disulfiram as Potential Candidatus Liberibacter asiaticus Inosine 5'-Monophosphate Dehydrogenase Inhibitors by Using Molecular Docking and Enzyme Kinetic. Molecules 2020; 25:E2313. [PMID: 32423116 PMCID: PMC7287799 DOI: 10.3390/molecules25102313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 04/30/2020] [Accepted: 05/11/2020] [Indexed: 12/12/2022] Open
Abstract
Citrus huanglongbing (HLB) is a destructive disease that causes significant damage to many citrus producing areas worldwide. To date, no strategy against this disease has been established. Inosine 5'-monophosphate dehydrogenase (IMPDH) plays crucial roles in the de novo synthesis of guanine nucleotides. This enzyme is used as a potential target to treat bacterial infection. In this study, the crystal structure of a deletion mutant of CLas IMPDHΔ98-201 in the apo form was determined. Eight known bioactive compounds were used as ligands for molecular docking. The results showed that bronopol and disulfiram bound to CLas IMPDHΔ98-201 with high affinity. These compounds were tested for their inhibition against CLas IMPDHΔ98-201 activity. Bronopol and disulfiram showed high inhibition at nanomolar concentrations, and bronopol was found to be the most potent molecule (Ki = 234 nM). The Ki value of disulfiram was 616 nM. These results suggest that bronopol and disulfiram can be considered potential candidate agents for the development of CLas inhibitors.
Collapse
Affiliation(s)
- Jing Nan
- College of Horticulture and Forestry, Key Laboratory of Horticultural Plant Biology of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China; (J.N.); (P.Z.)
| | - Shaoran Zhang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China;
| | - Ping Zhan
- College of Horticulture and Forestry, Key Laboratory of Horticultural Plant Biology of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China; (J.N.); (P.Z.)
| | - Ling Jiang
- College of Horticulture and Forestry, Key Laboratory of Horticultural Plant Biology of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China; (J.N.); (P.Z.)
| |
Collapse
|
13
|
Strepis N, Naranjo HD, Meier-Kolthoff J, Göker M, Shapiro N, Kyrpides N, Klenk HP, Schaap PJ, Stams AJM, Sousa DZ. Genome-guided analysis allows the identification of novel physiological traits in Trichococcus species. BMC Genomics 2020; 21:24. [PMID: 31914924 PMCID: PMC6950789 DOI: 10.1186/s12864-019-6410-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 12/18/2019] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND The genus Trichococcus currently contains nine species: T. flocculiformis, T. pasteurii, T. palustris, T. collinsii, T. patagoniensis, T. ilyis, T. paludicola, T. alkaliphilus, and T. shcherbakoviae. In general, Trichococcus species can degrade a wide range of carbohydrates. However, only T. pasteurii and a non-characterized strain of Trichococcus, strain ES5, have the capacity of converting glycerol to mainly 1,3-propanediol. Comparative genomic analysis of Trichococcus species provides the opportunity to further explore the physiological potential and uncover novel properties of this genus. RESULTS In this study, a genotype-phenotype comparative analysis of Trichococcus strains was performed. The genome of Trichococcus strain ES5 was sequenced and included in the comparison with the other nine type strains. Genes encoding functions related to e.g. the utilization of different carbon sources (glycerol, arabinan and alginate), antibiotic resistance, tolerance to low temperature and osmoregulation could be identified in all the sequences analysed. T. pasteurii and Trichococcus strain ES5 contain a operon with genes encoding necessary enzymes for 1,3-PDO production from glycerol. All the analysed genomes comprise genes encoding for cold shock domains, but only five of the Trichococcus species can grow at 0 °C. Protein domains associated to osmoregulation mechanisms are encoded in the genomes of all Trichococcus species, except in T. palustris, which had a lower resistance to salinity than the other nine studied Trichococcus strains. CONCLUSIONS Genome analysis and comparison of ten Trichococcus strains allowed the identification of physiological traits related to substrate utilization and environmental stress resistance (e.g. to cold and salinity). Some substrates were used by single species, e.g. alginate by T. collinsii and arabinan by T. alkaliphilus. Strain ES5 may represent a subspecies of Trichococcus flocculiformis and contrary to the type strain (DSM 2094T), is able to grow on glycerol with the production of 1,3-propanediol.
Collapse
Affiliation(s)
- Nikolaos Strepis
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
- Laboratory of Systems and Synthetic Biology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Henry D. Naranjo
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Jan Meier-Kolthoff
- Leibniz Institute DSMZ German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Markus Göker
- Leibniz Institute DSMZ German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
| | - Nicole Shapiro
- DOE Joint Genome Institute, 2800 Mitchell Drive 100, CA, Walnut Creek, CA 94598 USA
| | - Nikos Kyrpides
- DOE Joint Genome Institute, 2800 Mitchell Drive 100, CA, Walnut Creek, CA 94598 USA
| | - Hans-Peter Klenk
- Leibniz Institute DSMZ German Collection of Microorganisms and Cell Cultures, Inhoffenstraße 7B, 38124 Braunschweig, Germany
- School of Biology, Newcastle University, Ridley Building 2, Newcastle, NE1 7RU UK
| | - Peter J. Schaap
- Laboratory of Systems and Synthetic Biology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Alfons J. M. Stams
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Diana Z. Sousa
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| |
Collapse
|
14
|
Yang M, An Y, Zabed HM, Guo Q, Yun J, Zhang G, Awad FN, Sun W, Qi X. Random mutagenesis of Clostridium butyricum strain and optimization of biosynthesis process for enhanced production of 1,3-propanediol. Bioresour Technol 2019; 284:188-196. [PMID: 30933827 DOI: 10.1016/j.biortech.2019.03.098] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 03/14/2019] [Accepted: 03/16/2019] [Indexed: 06/09/2023]
Abstract
The aim of this work was to study the random mutagenesis of Clostridium butyricum strain. A high 1,3-PD tolerant mutant strain, designated as C. butyricum YP855, was developed from the wild strain C. butyricum XYB11, using combined chemical (NTG, N-methyl-N'-nitro-N-nitrosoguanidine,) and plasma-based mutagenesis (ARTP, atmospheric and room temperature plasma). The YP855 showed a maximum tolerance of 85 g/L to 1,3-PD (up to 30.8% increase) when compared with the tolerance exhibited by the wild strain. Under the optimum conditions as established by the response surface methodology (RSM), the mutant strain produced 37.20 g/L of 1,3-PD, which is 29.48% higher than the concentration obtained from the wild strain (28.73 g/L). This research would offer information for further development of the biosynthesis of 1,3-PD by the mutant strain of C. butyricum.
Collapse
Affiliation(s)
- Miaomiao Yang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Yingfeng An
- College of Biosciences and Biotechnology, Shenyang Agricultural University, 120 Dongling Road, Shenyang 110161, Liaoning, China
| | - Hossain M Zabed
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Qi Guo
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Junhua Yun
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Guoyan Zhang
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Faisal N Awad
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Wenjing Sun
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Xianghui Qi
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China; Guangxi Key Laboratory of Bio-refinery, Guangxi Academy of Sciences, 98 Daling Road, Nanning 530007, Guangxi, China.
| |
Collapse
|
15
|
Wang Z, Sun J, Tian M, Xu Z, Liu Y, Fu J, Yan A, Liu X. Proteomic Analysis of FNR-Regulated Anaerobiosis in Salmonella Typhimurium. J Am Soc Mass Spectrom 2019; 30:1001-1012. [PMID: 30903387 DOI: 10.1007/s13361-019-02145-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 01/23/2019] [Accepted: 01/24/2019] [Indexed: 06/09/2023]
Abstract
Bacterial pathogens such as Salmonella enterica serovar Typhimurium (S. Typhimurium) have to cope with fluctuating oxygen levels during infection within host gastrointestinal tracts. The global transcription factor FNR (fumarate nitrate reduction) plays a vital role in the adaptation of enteric bacteria to the low oxygen environment. Nevertheless, a comprehensive profile of the FNR regulon on the proteome level is still lacking in S. Typhimurium. Herein, we quantitatively profiled S. Typhimurium proteome of an fnr-deletion mutant during anaerobiosis in comparison to its parental strain. Notably, we found that FNR represses the expression of virulence genes of Salmonella pathogenicity island 1 (SPI-1) and negatively regulates propanediol utilization by directly binding to the promoter region of the pdu operon. Importantly, we provided evidence that S. Typhimurium lacking fnr exhibited increased antibiotics susceptibility and membrane permeability as well. Furthermore, genetic deletion of fnr leads to decreased bacterial survival in a Caenorhabditis elegans infection model, highlighting an important role of this regulator in mediating host-pathogen interactions.
Collapse
Affiliation(s)
- Zhen Wang
- Institute of Analytical Chemistry and Synthetic and Functional Biomolecules Center, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Jingjing Sun
- School of Biological Sciences, The University of Hong Kong, Pok Fu Lam Rd, Hong Kong SAR, China
| | - Mengdan Tian
- School of Biological Sciences, The University of Hong Kong, Pok Fu Lam Rd, Hong Kong SAR, China
| | - Zeling Xu
- School of Biological Sciences, The University of Hong Kong, Pok Fu Lam Rd, Hong Kong SAR, China
| | - Yanhua Liu
- Institute of Analytical Chemistry and Synthetic and Functional Biomolecules Center, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Jiaqi Fu
- Institute of Analytical Chemistry and Synthetic and Functional Biomolecules Center, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Aixin Yan
- School of Biological Sciences, The University of Hong Kong, Pok Fu Lam Rd, Hong Kong SAR, China.
| | - Xiaoyun Liu
- Institute of Analytical Chemistry and Synthetic and Functional Biomolecules Center, College of Chemistry and Molecular Engineering, Peking University, Beijing, China.
- Department of Microbiology, School of Basic Medical Sciences, Peking University Health Science Center, 38 Xueyuan Rd, Haidian District, Beijing, China.
| |
Collapse
|
16
|
Veras STS, Rojas P, Florencio L, Kato MT, Sanz JL. Production of 1,3-propanediol from pure and crude glycerol using a UASB reactor with attached biomass in silicone support. Bioresour Technol 2019; 279:140-148. [PMID: 30716606 DOI: 10.1016/j.biortech.2019.01.125] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 01/24/2019] [Accepted: 01/25/2019] [Indexed: 06/09/2023]
Abstract
The 1,3-propanediol (1,3-PDO) yield and productivity from glycerol were studied over a 155-day period. A UASB reactor that also contained silicone support for biomass attachment was used to evaluate the optimal operational conditions and microbiota development. The highest average 1,3-PDO yield was 0.54 and 0.48 mol.mol-gly-1 when reactor pH was 5.0-5.5 and the applied loading rate was 18 and 20 g-gly.L-1.d-1 using the pure and crude substrate, respectively. The productivity was close to 7.5 g.L-1.d-1 for both substrates; therefore, the direct use of crude glycerol can be valorized in practice. Clostridium was the predominant genus for 1,3-PDO production and C. pasteurianum was dominant in the biofilm. Using crude glycerol, C. beijerinckii dropped strongly; some Clostridium population was then replaced by Klebsiella pneumoniae and Lactobacillus spp. The good process performance and the advances in the microbiota knowledge are steps forward to obtain a more cost-effective system in practice.
Collapse
Affiliation(s)
- S T S Veras
- Universidad Autónoma de Madrid, Department of Molecular Biology, Madrid 28049, Spain; Federal University of Pernambuco, Department of Civil and Environmental Engineering, Laboratory of Environmental Sanitation, Recife, PE 50740-530, Brazil
| | - P Rojas
- Universidad Autónoma de Madrid, Department of Molecular Biology, Madrid 28049, Spain
| | - L Florencio
- Federal University of Pernambuco, Department of Civil and Environmental Engineering, Laboratory of Environmental Sanitation, Recife, PE 50740-530, Brazil
| | - M T Kato
- Federal University of Pernambuco, Department of Civil and Environmental Engineering, Laboratory of Environmental Sanitation, Recife, PE 50740-530, Brazil
| | - J L Sanz
- Universidad Autónoma de Madrid, Department of Molecular Biology, Madrid 28049, Spain.
| |
Collapse
|
17
|
Zhou S, Huang Y, Mao X, Li L, Guo C, Gao Y, Qin Q. Impact of acetolactate synthase inactivation on 1,3-propanediol fermentation by Klebsiella pneumoniae. PLoS One 2019; 14:e0200978. [PMID: 31017890 PMCID: PMC6481767 DOI: 10.1371/journal.pone.0200978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 03/20/2019] [Indexed: 11/18/2022] Open
Abstract
1,3-Propanediol (1,3-PDO) is an important compound that is mainly used in industry for polymer production. Fermentation of 1,3-PDO from glycerol by Klebsiella pneumoniae is accompanied by formation of 2,3-butanediol (2,3-BDO) as one of the main byproduct. The first step in the formation of 2,3-BDO from pyruvate is catalyzed by acetolactate synthase (ALS), an enzyme that competes with 1,3-PDO oxidoreductase for the cofactor NADH. This study aimed to analyze the impact of engineering the 2,3-BDO formation pathway via inactivation of ALS on 1,3-PDO fermentation by K. pneumoniae HSL4. An ALS mutant was generated using Red recombinase assisted gene replacement. The ALS specific activities of K. pneumoniae ΔALS were notably lower than that of the wild-type strain. Fed-batch fermentation of the mutant strain resulted in a 1,3-PDO concentration, productivity and conversion of 72.04 g L–1, 2.25 g L–1 h–1, and 0.41 g g–1, increase by 4.71%, 4.65% and 1.99% compared with the parent strain. Moreover, inactivation of ALS decreased meso-2,3-BDO formation to trace amounts, significantly increased 2S,3S-BDO and lactate production, and a pronounced redistribution of intracellular metabolic flux was apparent.
Collapse
Affiliation(s)
- Sheng Zhou
- College of Marine Sciences, South China Agricultural University, Guangzhou, China
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- * E-mail: (SZ); (QQ)
| | - Youhua Huang
- College of Marine Sciences, South China Agricultural University, Guangzhou, China
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Xinliang Mao
- College of Light Industry and Food Sciences, South China University of Technology, Tianhe Area, Guangzhou, China
| | - Lili Li
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Chuanyu Guo
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Yongli Gao
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Qiwei Qin
- College of Marine Sciences, South China Agricultural University, Guangzhou, China
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- * E-mail: (SZ); (QQ)
| |
Collapse
|
18
|
Carneiro I, Carvalho S, Henrique R, Oliveira LM, Tuchin VV. A robust ex vivo method to evaluate the diffusion properties of agents in biological tissues. J Biophotonics 2019; 12:e201800333. [PMID: 30585430 DOI: 10.1002/jbio.201800333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/30/2018] [Accepted: 12/23/2018] [Indexed: 06/09/2023]
Abstract
A robust method is presented for evaluating the diffusion properties of chemicals in ex vivo biological tissues. Using this method that relies only on thickness and collimated transmittance measurements, the diffusion properties of glycerol, fructose, polypropylene glycol and water in muscle tissues were evaluated. Amongst other results, the diffusion coefficient of glycerol in colorectal muscle was estimated with a value of 3.3 × 10-7 cm2 /s. Due to the robustness and simplicity of the method, it can be used in other fields of biomedical engineering, namely in organ cryoprotection and food industry.
Collapse
Affiliation(s)
- Isa Carneiro
- Department of Pathology and Cancer Biology, and Epigenetics Group - Research Center, Portuguese Oncology Institute of Porto, Porto, Portugal
| | - Sónia Carvalho
- Department of Pathology and Cancer Biology, and Epigenetics Group - Research Center, Portuguese Oncology Institute of Porto, Porto, Portugal
| | - Rui Henrique
- Department of Pathology and Cancer Biology, and Epigenetics Group - Research Center, Portuguese Oncology Institute of Porto, Porto, Portugal
- Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar - University of Porto (ICBAS-UP), Porto, Portugal
| | - Luís M Oliveira
- Physics Department - Polytechnic Institute of Porto, School of Engineering, Porto, Portugal
- Centre of Innovation in Engineering and Industrial Technology (CIETI), School of Engineering, Polytechnic of Porto, Porto, Portugal
| | - Valery V Tuchin
- Research-Educational Institute of Optics and Biophotonics, Saratov State University, Saratov, Russian Federation
- Interdisciplinary Laboratory of Biophotonics, Tomsk State University, Tomsk, Russian Federation
- Laboratory of Femtomedicine, ITMO University, Saint-Petersburg, Russian Federation
- Laboratory of Laser Diagnostics of Technical and Living Systems, Institute of Precision Mechanics and Control of the Russian Academy of Sciences, Saratov, Russian Federation
| |
Collapse
|
19
|
Zhao WC, Ren HR, Zhang X, Wang Z, Zhao YM, Liu L, Wu ZL, Xu HJ. Rapid determination of 1,3-propanediol in fermentation process based on a novel surface-enhanced Raman scattering biosensor. Spectrochim Acta A Mol Biomol Spectrosc 2019; 211:227-233. [PMID: 30550984 DOI: 10.1016/j.saa.2018.11.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 11/11/2018] [Accepted: 11/15/2018] [Indexed: 06/09/2023]
Abstract
The production of 1,3-propanediol (1,3-PDO) is an important fermentation process. However, 1,3-PDO could not be distinguished separately and efficiently in fermentations previously because it has a highly similar molecular structure to the feedstock glycerol (GLY) and by-product lactic acid (Lac), which leads to the difficulty of quantification. In this paper, a low-cost and environmentally friendly biosensor based on surface-enhanced Raman scattering (SERS) technique was developed. Using it, the concentration of 1,3-PDO and Lac in a fermentation solution can be determined directly from their respective characteristic peaks in Raman spectroscopy. Moreover, by analyzing the respective contributions of 1,3-PDO, Lac, and GLY to the integrated intensities of the 2920 cm-1 Raman peak common to these three substances, the concentration of GLY could also be quantified. SERS study on various 1,3-PDO:GLY and Lac:GLY molar ratios were conducted to establish the proportional relationships of these compounds by analyzing the relationship between the concentration and the Raman peak intensities. The 1,3-PDO:Lac:GLY with serial concentration gradient was carried out to verify the relationship between the concentration and the Raman peak intensities by the high-performance liquid chromatography (HPLC) with relative deviations <25%. Concentrations of 1,3-PDO and Lac as low as 1 g/L and concentration of GLY as low as 4 g/L were analyzed to determine the limit of detection. Therefore, this new method allows the rapid quantification of 1,3-PDO, Lac and GLY concentrations on a SERS-based biosensor.
Collapse
Affiliation(s)
- Wei Chen Zhao
- Beijing Bioprocess Key Laboratory, Beijing University of Chemical Technology, Beijing 100029, PR China; College of Science, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Hai Rui Ren
- Beijing Bioprocess Key Laboratory, Beijing University of Chemical Technology, Beijing 100029, PR China; College of Science, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Xin Zhang
- Beijing Bioprocess Key Laboratory, Beijing University of Chemical Technology, Beijing 100029, PR China; College of Science, Beijing University of Chemical Technology, Beijing 100029, PR China.
| | - Zheng Wang
- Beijing Bioprocess Key Laboratory, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Yong Mei Zhao
- Engineering Research Center for Semiconductor Integrated Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, PR China
| | - Luo Liu
- Beijing Bioprocess Key Laboratory, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Zheng Long Wu
- Analytical and Testing Center, Beijing Normal University, Beijing 100875, PR China
| | - Hai Jun Xu
- Beijing Bioprocess Key Laboratory, Beijing University of Chemical Technology, Beijing 100029, PR China; College of Science, Beijing University of Chemical Technology, Beijing 100029, PR China.
| |
Collapse
|
20
|
Serrano-Bermúdez LM, González Barrios AF, Montoya D. Clostridium butyricum population balance model: Predicting dynamic metabolic flux distributions using an objective function related to extracellular glycerol content. PLoS One 2018; 13:e0209447. [PMID: 30571717 PMCID: PMC6301710 DOI: 10.1371/journal.pone.0209447] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 12/05/2018] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Extensive experimentation has been conducted to increment 1,3-propanediol (PDO) production using Clostridium butyricum cultures in glycerol, but computational predictions are limited. Previously, we reconstructed the genome-scale metabolic (GSM) model iCbu641, the first such model of a PDO-producing Clostridium strain, which was validated at steady state using flux balance analysis (FBA). However, the prediction ability of FBA is limited for batch and fed-batch cultures, which are the most often employed industrial processes. RESULTS We used the iCbu641 GSM model to develop a dynamic flux balance analysis (DFBA) approach to predict the PDO production of the Colombian strain Clostridium sp IBUN 158B. First, we compared the predictions of the dynamic optimization approach (DOA), static optimization approach (SOA), and direct approach (DA). We found no differences between approaches, but the DOA simulation duration was nearly 5000 times that of the SOA and DA simulations. Experimental results at glycerol limitation and glycerol excess allowed for validating dynamic predictions of growth, glycerol consumption, and PDO formation. These results indicated a 4.4% error in PDO prediction and therefore validated the previously proposed objective functions. We performed two global sensitivity analyses, finding that the kinetic input parameters of glycerol uptake flux had the most significant effect on PDO predictions. The other input parameters evaluated during global sensitivity analysis were biomass composition (precursors and macromolecules), death constants, and the kinetic parameters of acetic acid secretion flux. These last input parameters, all obtained from other Clostridium butyricum cultures, were used to develop a population balance model (PBM). Finally, we simulated fed-batch cultures, predicting a final PDO production near to 66 g/L, almost three times the PDO predicted in the best batch culture. CONCLUSIONS We developed and validated a dynamic approach to predict PDO production using the iCbu641 GSM model and the previously proposed objective functions. This validated approach was used to propose a population model and then an increment in predictions of PDO production through fed-batch cultures. Therefore, this dynamic model could predict different scenarios, including its integration into downstream processes to predict technical-economic feasibilities and reducing the time and costs associated with experimentation.
Collapse
Affiliation(s)
- Luis Miguel Serrano-Bermúdez
- Bioprocesses and Bioprospecting Group, Universidad Nacional de Colombia, Ciudad Universitaria, Carrera, Bogotá D.C., Colombia
- Grupo Cundinamarca Agroambiental, Departamento de Ingeniería Ambiental, Universidad de Cundinamarca, Facatativá, Colombia
| | - Andrés Fernando González Barrios
- Grupo de Diseño de Productos y Procesos (GDPP), Departamento de Ingeniería Química, Universidad de los Andes, Bogotá D.C., Colombia
| | - Dolly Montoya
- Bioprocesses and Bioprospecting Group, Universidad Nacional de Colombia, Ciudad Universitaria, Carrera, Bogotá D.C., Colombia
| |
Collapse
|
21
|
Pan DT, Wang XD, Shi HY, Yuan DC, Xiu ZL. Dynamic flux balance analysis for microbial conversion of glycerol into 1,3-propanediol by Klebsiella pneumoniae. Bioprocess Biosyst Eng 2018; 41:1793-1805. [PMID: 30173374 DOI: 10.1007/s00449-018-2002-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 08/24/2018] [Indexed: 12/26/2022]
Abstract
To investigate the relationship between the yield of 1,3-propanediol (1,3-PD) and the flux variation in metabolic pathways of Klebsiella pneumoniae, an optimized calculation method was constructed on basis of dynamic flux balance analysis by combining genome-scale flux balance analysis with a kinetic model of extracellular metabolites. Through optimizing calculations, a more completely expanded metabolic pathway was obtained, which includes the previously reported metabolic pathway and additional three pathways or site: a pentose phosphate pathway (PPP) elicited at the dihydroxyacetone (DHA) node to provide more reducing equivalents; a branch of synthetic amino acids at the 3-phosphoglycerate (3PG) node; and the α-ketoglutarate site in the tricarboxylic acid (TCA) cycle leading to anabolic pathways for glutamate and other amino acids. On this basis, the relationships between the dynamic flux distribution of the important nodes in the metabolic pathway and the yield of 1,3-propanediol were analyzed. First, dynamic flux change from DHA to the PPP is positively correlated with the yield. Second, variation in flux in the TCA cycle is also positively correlated with the yield of 1,3-propanediol. In addition, the influence of the feedback loop formed by the cofactor tetrahydrofolate on the flux change of TCA in the amino acid anabolic pathway was examined. These results are of important reference value and have guiding significance for the extension of the glycerol metabolism pathway in K. pneumoniae, the rational transformation of genetic engineering in bacteria, and the optimization of metabolic pathways for industrial production.
Collapse
Affiliation(s)
- Duo-Tao Pan
- School of Life Science and Biotechnology, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, People's Republic of China
- Chemical Control Technology Key Laboratory of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, 110142, People's Republic of China
- Institute of Information and Engineering, Shenyang University of Chemical and Technology, Shenyang, 110142, People's Republic of China
| | - Xu-Dong Wang
- School of Life Science and Biotechnology, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, People's Republic of China
| | - Hong-Yan Shi
- Chemical Control Technology Key Laboratory of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, 110142, People's Republic of China
- Institute of Information and Engineering, Shenyang University of Chemical and Technology, Shenyang, 110142, People's Republic of China
| | - De-Cheng Yuan
- Chemical Control Technology Key Laboratory of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, 110142, People's Republic of China
- Institute of Information and Engineering, Shenyang University of Chemical and Technology, Shenyang, 110142, People's Republic of China
| | - Zhi-Long Xiu
- School of Life Science and Biotechnology, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, People's Republic of China.
| |
Collapse
|
22
|
Kim M, Vala M, Ertsgaard CT, Oh SH, Lodge TP, Bates FS, Hackel BJ. Surface Plasmon Resonance Study of the Binding of PEO-PPO-PEO Triblock Copolymer and PEO Homopolymer to Supported Lipid Bilayers. Langmuir 2018; 34:6703-6712. [PMID: 29787676 PMCID: PMC6055929 DOI: 10.1021/acs.langmuir.8b00873] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Poloxamer 188 (P188), a poly(ethylene oxide)- b-poly(propylene oxide)- b-poly(ethylene oxide) triblock copolymer, protects cell membranes against various external stresses, whereas poly(ethylene oxide) (PEO; 8600 g/mol) homopolymer lacks protection efficacy. As part of a comprehensive effort to elucidate the protection mechanism, we used surface plasmon resonance (SPR) to obtain direct evidence of binding of the polymers onto supported lipid bilayers. Binding kinetics and coverage of P188 and PEO were examined and compared. Most notably, PEO exhibited membrane association comparable to that of P188, evidenced by comparable association rate constants and coverage. This result highlights the need for additional mechanistic understanding beyond simple membrane association to explain the differential efficacy of P188 in therapeutic applications.
Collapse
|
23
|
Burniol-Figols A, Varrone C, Le SB, Daugaard AE, Skiadas IV, Gavala HN. Combined polyhydroxyalkanoates (PHA) and 1,3-propanediol production from crude glycerol: Selective conversion of volatile fatty acids into PHA by mixed microbial consortia. Water Res 2018; 136:180-191. [PMID: 29505919 DOI: 10.1016/j.watres.2018.02.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 01/30/2018] [Accepted: 02/12/2018] [Indexed: 06/08/2023]
Abstract
Crude glycerol is an important by-product of the biodiesel industry, which can be converted into volatile fatty acids (VFA) and/or 1,3-propanediol (1,3-PDO) by fermentation. In this study, a selective conversion of VFA to polyhydroxyalkanoates (PHA) was attained while leaving 1,3-PDO in the supernatant by means of mixed microbial consortia selection strategies. The process showed highly reproducible results in terms of PHA yield, 0.99 ± 0.07 Cmol PHA/Cmol S (0.84 g COD PHA/g COD S), PHA content (76 ± 3.1 g PHA/100 g TSS) and 1,3-PDO recovery (99 ± 2.1%). The combined process had an ultimate yield from crude glycerol of 0.19 g COD PHA and 0.42 g COD 1,3-PDO per g of input COD. The novel enrichment strategy applied for selectively transforming fermentation by-products into a high value product (PHA) demonstrates the significance of the enrichment process for targeting specific bio-transformations and could potentially prove valuable for other biotechnological applications as well.
Collapse
Affiliation(s)
- Anna Burniol-Figols
- Technical University of Denmark (DTU), Dept. of Chemical and Biochemical Engineering, Søltofts Plads, Building 229, 2800, Kgs. Lyngby, Denmark
| | - Cristiano Varrone
- Technical University of Denmark (DTU), Dept. of Chemical and Biochemical Engineering, Søltofts Plads, Building 229, 2800, Kgs. Lyngby, Denmark
| | - Simone Balzer Le
- SINTEF, Materials and Chemistry, Dept. of Biotechnology and Nanomedicine, Postboks 4760 Torgarden, 7465, Trondheim, Norway
| | - Anders Egede Daugaard
- Technical University of Denmark (DTU), Dept. of Chemical and Biochemical Engineering, Søltofts Plads, Building 229, 2800, Kgs. Lyngby, Denmark
| | - Ioannis V Skiadas
- Technical University of Denmark (DTU), Dept. of Chemical and Biochemical Engineering, Søltofts Plads, Building 229, 2800, Kgs. Lyngby, Denmark
| | - Hariklia N Gavala
- Technical University of Denmark (DTU), Dept. of Chemical and Biochemical Engineering, Søltofts Plads, Building 229, 2800, Kgs. Lyngby, Denmark.
| |
Collapse
|
24
|
Wang J, Zhao P, Li Y, Xu L, Tian P. Engineering CRISPR interference system in Klebsiella pneumoniae for attenuating lactic acid synthesis. Microb Cell Fact 2018; 17:56. [PMID: 29622042 PMCID: PMC5887262 DOI: 10.1186/s12934-018-0903-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 03/31/2018] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Klebsiella pneumoniae is a promising industrial species for bioproduction of bulk chemicals such as 1,3-propanediol, 2,3-butanediol and 3-hydroxypropionic acid (3-HP). However, lactic acid is a troublesome by-product when optimizing for 3-HP production. Therefore, it is highly desirable to minimize lactic acid. RESULTS Here, we show that lactic acid synthesis can be largely blocked by an engineered CRISPR interference (CRISPRi) system in K. pneumoniae. EGFP was recruited as a reporter of this CRISPRi system. Fluorescence assay of this CRISPRi system showed that enhanced green fluorescent protein (EGFP) expression level was repressed by 85-90%. To further test this CRISPRi system, guide RNAs were designed to individually or simultaneously target four lactate-producing enzyme genes. Results showed that all lactate-producing enzyme genes were significantly repressed. Notably, D-lactate dehydrogenase (ldhA) was shown to be the most influential enzyme for lactic acid formation in micro-aerobic conditions, as inhibiting ldhA alone led to lactic acid level similar to simultaneously repressing four genes. In shake flask cultivation, the strain coexpressing puuC (an aldehyde dehydrogenase catalyzing 3-hydroxypropionaldehyde to 3-HP) and dCas9-sgRNA inhibiting ldhA produced 1.37-fold 3-HP relative to the reference strain. Furthermore, in bioreactor cultivation, this CRISPRi strain inhibiting ldhA produced 36.7 g/L 3-HP, but only generated 1 g/L lactic acid. Clearly, this engineered CRISPRi system largely simplified downstream separation of 3-HP from its isomer lactic acid, an extreme challenge for 3-HP bioprocess. CONCLUSIONS This study offers a deep understanding of lactic acid metabolism in diverse species, and we believe that this CRISPRi system will facilitate biomanufacturing and functional genome studies of K. pneumoniae or beyond.
Collapse
Affiliation(s)
- Jingxuan Wang
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029 People’s Republic of China
| | - Peng Zhao
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029 People’s Republic of China
| | - Ying Li
- College of Biochemical Engineering, Beijing Union University, Beijing, 100023 People’s Republic of China
| | - Lida Xu
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029 People’s Republic of China
| | - Pingfang Tian
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029 People’s Republic of China
| |
Collapse
|
25
|
Hsiao F, Huang PY, Aoyagi T, Chang SF, Liaw J. In vitro and in vivo assessment of delivery of hydrophobic molecules and plasmid DNAs with PEO–PPO–PEO polymeric micelles on cornea. J Food Drug Anal 2018; 26:869-878. [PMID: 29567259 PMCID: PMC9322236 DOI: 10.1016/j.jfda.2017.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 08/29/2017] [Accepted: 09/17/2017] [Indexed: 12/23/2022] Open
Abstract
The stability and bio-distribution of genes or drug complexes with poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO–PPO–PEO, Pluronic F-68) polymeric micelles (PM) are essential for an effective nanosized PM delivery system. We used Förster resonance energy transfer (FRET) pairs with PM and measured the FRET ratio to assess the stability of PM in vitro and in vivo on the cornea. The FRET ratio reached a plateau at 0.8 with 3% PM. Differential scanning calorimetry measurement confirmed the complex formation of FRET pairs with PM. Confocal imaging with the fluorophores fluorescein isothiocyanate isomer I (FITC) and rhodamine B base (RhB) also showed the occurrence of FRET pairs in vitro. The fluorophores were mixed with 3% PM solution or the FITC-labeled PEO–PPO–PEO polymers (FITC-P) were mixed with RhB-labeled plasmids (RhB–DNA). In addition, the in vitro corneal permeation of FRET pair complexes with PM reached a 0.8 FRET ratio. One hour after eye drop administration, FRET pairs colocalized in the cytoplasm, and surrounded and entered the nuclei of cells in the cornea, and the polymers were located in the corneal epithelial layers, as detected through anti-PEG immunohistochemistry. Furthermore, fluorescence colocalization in the cytoplasm and cell nucleus of the corneal epithelium was confirmed in tissues where RhB or RhB–DNA complexed with FITC-P was found to accumulate. We demonstrate that at a concentration of 3%, PM can encapsulate FRET pairs or RhB–DNA and retain their integrity within the cornea 1 h after administration, suggesting the feasibility and stability of PEO–PPO–PEO polymers as a vehicle for drug delivery.
Collapse
Affiliation(s)
- Feichin Hsiao
- School of Pharmacy, College of Pharmacy, Taipei Medical University, 250 Wu-Hsing Street, Taipei 11031,
Taiwan
| | - Po-Yang Huang
- School of Pharmacy, College of Pharmacy, Taipei Medical University, 250 Wu-Hsing Street, Taipei 11031,
Taiwan
| | - Takao Aoyagi
- Department of Materials and Applied Chemistry, College of Science and Technology, Nihon University, Chiyoda, Tokyo 101-8308,
Japan
| | - Shwu-Fen Chang
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, 250 Wu-Hsing Street, Taipei 11031,
Taiwan
| | - Jiahorng Liaw
- School of Pharmacy, College of Pharmacy, Taipei Medical University, 250 Wu-Hsing Street, Taipei 11031,
Taiwan
- Corresponding author. Fax: +886 2 23779873. E-mail address: (J. Liaw)
| |
Collapse
|
26
|
Burniol-Figols A, Varrone C, Daugaard AE, Le SB, Skiadas IV, Gavala HN. Polyhydroxyalkanoates (PHA) production from fermented crude glycerol: Study on the conversion of 1,3-propanediol to PHA in mixed microbial consortia. Water Res 2018; 128:255-266. [PMID: 29107910 DOI: 10.1016/j.watres.2017.10.046] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 09/24/2017] [Accepted: 10/21/2017] [Indexed: 06/07/2023]
Abstract
Crude glycerol, a by-product from the biodiesel industry, can be converted by mixed microbial consortia into 1,3-propanediol (1,3-PDO) and volatile fatty acids. In this study, further conversion of these main products into polyhydroxyalkanoates (PHA) was investigated with the focus on 1,3-PDO. Two different approaches for the enrichment of PHA accumulating microbial consortia using an aerobic dynamic feeding strategy were applied. With the first approach, where nitrogen was present during the whole cycle, no net production of PHA from 1,3-PDO was observed in the fermented effluent, not even in a nitrogen-limited PHA accumulation assay. Nevertheless, experiments in synthetic substrates revealed that the conversion of 1,3-PDO to PHA was possible under nitrogen limiting conditions. Thus, a different enrichment strategy was formulated where nitrogen was limited during the feast phase to stimulate the storage response. Nitrogen was still supplied during the famine phase. With the latter strategy, a net production of PHA from 1,3-PDO was observed at a yield of 0.24 Cmol PHA/Cmol 1,3-PDO. The overall yield from the fermented effluent was 0.42 Cmol PHA/Cmol substrate. Overall, the PHA yield from 1,3-PDO seemed to be limited, similarly to when using glycerol as a substrate, by a decarboxylation step and accumulation of other storage polymers such as glycogen, and possibly, lipid inclusions.
Collapse
Affiliation(s)
- Anna Burniol-Figols
- Technical University of Denmark (DTU), Dept. of Chemical and Biochemical Engineering, Center for Bioprocess Engineering, Søltofts Plads, Building 229, 2800, Kgs. Lyngby, Denmark
| | - Cristiano Varrone
- Technical University of Denmark (DTU), Dept. of Chemical and Biochemical Engineering, Center for Bioprocess Engineering, Søltofts Plads, Building 229, 2800, Kgs. Lyngby, Denmark
| | - Anders Egede Daugaard
- Technical University of Denmark (DTU), Dept. of Chemical and Biochemical Engineering, Danish Polymer Center, Søltofts Plads, Building 229, 2800, Kgs. Lyngby, Denmark
| | - Simone Balzer Le
- SINTEF, Materials and Chemistry, Dept. Biotechnology and Nanomedicine, Postboks 4760 Sluppen, 7465, Trondheim, Norway
| | - Ioannis V Skiadas
- Technical University of Denmark (DTU), Dept. of Chemical and Biochemical Engineering, Pilot Plant, Søltofts Plads, Building 229, 2800, Kgs. Lyngby, Denmark
| | - Hariklia N Gavala
- Technical University of Denmark (DTU), Dept. of Chemical and Biochemical Engineering, Center for Bioprocess Engineering, Søltofts Plads, Building 229, 2800, Kgs. Lyngby, Denmark.
| |
Collapse
|
27
|
Abstract
Today, biofuels represent a hot topic in the context of petroleum and adjacent products decrease. As biofuels production increase, so does the production of their major byproduct, namely crude glycerol. The efficient usage of raw glycerol will concur to the biodiesel viability. As an inevitable waste of biodiesel manufacturing, glycerol is potentially an attractive substrate for the production of value-added products by fermentation processes, due to its large amounts, low cost and high degree of reduction. One of the most important usages of glycerol is its bioconversion through microbial fermentation to value-added materials like 1,3-propanediol and citric acid. There is a considerable industrial interest in 1,3-propanediol and citric acid production based on microbial fermentations, as it seems to be in competition with traditional technologies utilized for these products. In the present work, yields and concentrations of 1,3-propanediol and citric acid registered for different isolated strains are also described. Microbial bioconversion of glycerol represents a remarkable choice to add value to the biofuel production chain, allowing the biofuel industry to be more competitive. The current review presents certain ways for the bioconversion of crude glycerol into citric acid and 1,3-propanediol with high yields and concentrations achieved by using isolated microorganisms.
Collapse
Affiliation(s)
- Laura Mitrea
- Department of Food Science, Faculty of Food Science and Technology, Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Calea Mănăştur 3-5, 400372 Cluj-Napoca, Romania
| | - Monica Trif
- Department of Food Science, Faculty of Food Science and Technology, Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Calea Mănăştur 3-5, 400372 Cluj-Napoca, Romania
| | - Adriana-Florinela Cătoi
- Pathophysiology Department, “Iuliu Haţieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Dan-Cristian Vodnar
- Department of Food Science, Faculty of Food Science and Technology, Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Calea Mănăştur 3-5, 400372 Cluj-Napoca, Romania
| |
Collapse
|
28
|
Wang JC, Bindokas VP, Skinner M, Emrick T, Marks JD. Mitochondrial mechanisms of neuronal rescue by F-68, a hydrophilic Pluronic block co-polymer, following acute substrate deprivation. Neurochem Int 2017; 109:126-140. [PMID: 28433663 PMCID: PMC5641222 DOI: 10.1016/j.neuint.2017.04.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 03/29/2017] [Accepted: 04/10/2017] [Indexed: 01/09/2023]
Abstract
Global brain ischemia can lead to widespread neuronal death and poor neurologic outcomes in patients. Despite detailed understanding of the cellular and molecular mechanisms mediating neuronal death following focal and global brain hypoxia-ischemia, treatments to reduce ischemia-induced brain injury remain elusive. One pathway central to neuronal death following global brain ischemia is mitochondrial dysfunction, one consequence of which is the cascade of intracellular events leading to mitochondrial outer membrane permeabilization. A novel approach to rescuing injured neurons from death involves targeting cellular membranes using a class of synthetic molecules called Pluronics. Pluronics are triblock copolymers of hydrophilic poly[ethylene oxide] (PEO) and hydrophobic poly[propylene oxide] (PPO). Evidence is accumulating to suggest that hydrophilic Pluronics rescue injured neurons from death following substrate deprivation by preventing mitochondrial dysfunction. Here, we will review current understanding of the nature of interaction of Pluronic molecules with biological membranes and the efficacy of F-68, an 80% hydrophilic Pluronic, in rescuing neurons from injury. We will review data indicating that F-68 reduces mitochondrial dysfunction and mitochondria-dependent death pathways in a model of neuronal injury in vitro, and present new evidence that F-68 acts directly on mitochondria to inhibit mitochondrial outer membrane permeabilization. Finally, we will present results of a pilot, proof-of-principle study suggesting that F-68 is effective in reducing hippocampal injury induced by transient global ischemia in vivo. By targeting mitochondrial dysfunction, F-68 and other Pluronic molecules constitute an exciting new approach to rescuing neurons from acute injury.
Collapse
Affiliation(s)
- Janice C Wang
- Department of Pediatrics, University of Chicago, Chicago, IL, United States
| | - Vytautas P Bindokas
- Department of Pharmacological, Physiological Sciences, University of Chicago, IL, United States
| | - Matthew Skinner
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA, United States
| | - Todd Emrick
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA, United States
| | - Jeremy D Marks
- Department of Pediatrics, University of Chicago, Chicago, IL, United States; Grossman Institute for Neuroscience, Quantitative Biology and Human Behavior, University of Chicago, Chicago, IL, United States.
| |
Collapse
|
29
|
Chen L, Hatti-Kaul R. Exploring Lactobacillus reuteri DSM20016 as a biocatalyst for transformation of longer chain 1,2-diols: Limits with microcompartment. PLoS One 2017; 12:e0185734. [PMID: 28957423 PMCID: PMC5619818 DOI: 10.1371/journal.pone.0185734] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 09/18/2017] [Indexed: 11/18/2022] Open
Abstract
Lactobacillus reuteri metabolises glycerol efficiently to form 3-hydroxypropionic acid (3-HP) and 1,3-propanediol (1,3PDO) by the same mechanism as that for 1,2-propanediol (1,2PDO) conversion to propionic acid and propanol via its propanediol utilization (pdu) pathway. Pdu enzymes are encoded by the pdu-operon, which also contain genes encoding the shell proteins of the microcompartment housing the metabolic pathway. In this work the selectivity and kinetics of the reactions catalysed by L. reuteri DSM20016 Pdu enzymes glycerol dehydratase (GDH), 1,3-propanediol oxidoreductase (PduQ) and coenzyme-A acylating propionaldehyde dehydrogenase (PduP), produced recombinantly, was investigated against corresponding substrates of different chain lengths. Glycerol dehydratase exhibited activity against C2-C4 polyols, with the highest activity against glycerol and 1,2-propanediol (1,2-PDO). A double mutant of the pduC gene of GDH (PduC-S302A/Q337A) was constructed that displayed lowered activity against glycerol and 1,2PDO but extended the substrate range upto C6-diol. The best substrate for both PduQ and PduP was 3-hydroxypropanal (3HPA), although PduP exhibited nearly 10-fold higher specific activity. The enzymes also showed some activity against C3-C10 aliphatic aldehydes, with PduP having higher relative activity. Subsequently, transformation of polyols using whole cells of L. reuteri containing the wild type- and mutated GDH, respectively, confirmed the reduced activity of the mutant against glycerol and 1,2PDO, but its activity against longer substrates was negligible. In contrast, recombinant Escherichia coli BL21(DE3) cells harboring the GDH variant converted diols with up to C6 carbon chain length to their respective aldehydes, suggesting that the protein shell of the microcompartment in L. reuteri posed a barrier to the passage of longer chain substrate.
Collapse
Affiliation(s)
- Lu Chen
- Division of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Lund, Sweden
- * E-mail:
| | - Rajni Hatti-Kaul
- Division of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Lund, Sweden
| |
Collapse
|
30
|
Tahir HAS, Gu Q, Wu H, Raza W, Safdar A, Huang Z, Rajer FU, Gao X. Effect of volatile compounds produced by Ralstonia solanacearum on plant growth promoting and systemic resistance inducing potential of Bacillus volatiles. BMC Plant Biol 2017; 17:133. [PMID: 28768498 PMCID: PMC5541429 DOI: 10.1186/s12870-017-1083-6] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 07/23/2017] [Indexed: 05/20/2023]
Abstract
BACKGROUND Microbial volatiles play an expedient role in the agricultural ecological system by enhancing plant growth and inducing systemic resistance against plant pathogens, without causing hazardous effects on the environment. To explore the effects of VOCs of Ralstonia solanacearum TBBS1 (Rs) on tobacco plant growth and on plant growth promoting efficiency of VOCs produced by Bacillus subtilis SYST2, experiments were conducted both in vitro and in planta. RESULTS The VOCs produced by SYST2 significantly enhanced the plant growth and induced the systemic resistance (ISR) against wilt pathogen Rs in all experiments. The SYST2-VOCs significantly increased PPO and PAL activity and over-expressed the genes relating to expansin, wilt resistance, and plant defense while repressed the genes relating to ethylene production. More interestingly, VOCs produced by pathogen, Rs had no significant effect on plant growth; however, Rs-VOCs decreased the growth promoting potential of SYST2-VOCs when plants were exposed to VOCs produced by both SYST2 and Rs. The co-culture of SYST2 and Rs revealed that they inhibited the growth of each other; however, the inhibition of Rs by SYST2-VOCs appeared to be greater than that of SYST2 by Rs-VOCs. CONCLUSION Our findings provide new insights regarding the interaction among SYST2-VOCs, Rs-VOCs and plant, resulting in growth promotion and induced systemic resistance against the bacterial wilt pathogen Rs. This is the first report of the effect of VOCs produced by pathogenic microorganism on plant growth and on plant growth-promoting and systemic resistance-inducing potential of PGPR strain SYST2.
Collapse
Affiliation(s)
- Hafiz Abdul Samad Tahir
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Weigang No.1, Nanjing, 210095 People’s Republic of China
- Plant Pathology section, Tobacco Research station, Pakistan Tobacco Board, Ministry of Commerce, Govt. of Pakistan, Hayatabad, Peshawar, Pakistan
| | - Qin Gu
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Weigang No.1, Nanjing, 210095 People’s Republic of China
| | - Huijun Wu
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Weigang No.1, Nanjing, 210095 People’s Republic of China
| | - Waseem Raza
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Weigang No.1, Nanjing, 210095 People’s Republic of China
| | - Asma Safdar
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Weigang No.1, Nanjing, 210095 People’s Republic of China
| | - Ziyang Huang
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Weigang No.1, Nanjing, 210095 People’s Republic of China
| | - Faheem Uddin Rajer
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Weigang No.1, Nanjing, 210095 People’s Republic of China
| | - Xuewen Gao
- Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Weigang No.1, Nanjing, 210095 People’s Republic of China
| |
Collapse
|
31
|
Ratanapariyanuch K, Shim YY, Emami S, Reaney MJT. Production of Protein Concentrate and 1,3-Propanediol by Wheat-Based Thin Stillage Fermentation. J Agric Food Chem 2017; 65:3858-3867. [PMID: 28453269 DOI: 10.1021/acs.jafc.7b00772] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Fermentation of wheat with yeast produces thin stillage (W-TS) and distiller's wet grains. A subsequent fermentation of W-TS (two-stage fermentation, TSF) with endemic bacteria at 25 and 37 °C decreased glycerol and lactic acid concentrations, while 1,3-propanediol (1,3-PD) and acetic acid accumulated with greater 1,3-PD and acetic acid produced at 37 °C. During TSF, W-TS colloids coagulated and floated in the fermentation medium producing separable liquid and slurry fractions. The predominant endemic bacteria in W-TS were Lactobacillus panis, L. gallinarum, and L. helveticus, and this makeup did not change substantially as fermentation progressed. As nutrients were exhausted, floating particles precipitated. Protein contents of slurry and clarified liquid increased and decreased, respectively, as TSF progressed. The liquid was easily filtered through an ultrafiltration membrane. These results suggested that TSF is a novel method for W-TS clarification and production of protein concentrates and 1,3-PD from W-TS.
Collapse
Affiliation(s)
- Kornsulee Ratanapariyanuch
- Department of Plant Sciences, University of Saskatchewan , 51 Campus Drive, Saskatoon, Saskatchewan S7N 5A8, Canada
| | - Youn Young Shim
- Department of Plant Sciences, University of Saskatchewan , 51 Campus Drive, Saskatoon, Saskatchewan S7N 5A8, Canada
- Prairie Tide Chemicals Incorporated, 102 Melville Street, Saskatoon, Saskatchewan S7J 0R1, Canada
- Guangdong Saskatchewan Oilseed Joint Laboratory, Department of Food Science and Engineering, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
| | - Shahram Emami
- Department of Plant Sciences, University of Saskatchewan , 51 Campus Drive, Saskatoon, Saskatchewan S7N 5A8, Canada
| | - Martin J T Reaney
- Department of Plant Sciences, University of Saskatchewan , 51 Campus Drive, Saskatoon, Saskatchewan S7N 5A8, Canada
- Prairie Tide Chemicals Incorporated, 102 Melville Street, Saskatoon, Saskatchewan S7J 0R1, Canada
- Guangdong Saskatchewan Oilseed Joint Laboratory, Department of Food Science and Engineering, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
| |
Collapse
|
32
|
Kurahashi K, Kimura C, Fujimoto Y, Tokumoto H. Value-adding conversion and volume reduction of sewage sludge by anaerobic co-digestion with crude glycerol. Bioresour Technol 2017; 232:119-125. [PMID: 28214698 DOI: 10.1016/j.biortech.2017.02.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 01/31/2017] [Accepted: 02/03/2017] [Indexed: 06/06/2023]
Abstract
In this study, conversion of sewage sludge to biogas by anaerobic co-digestion with crude glycerol was examined. When 0.126g/L crude glycerol was added to the reactor, only methane was produced. Upon addition of 5.04g/L crude glycerol, hydrogen production occurred, and a significant amount of 1,3-propanediol (1,3-PDO) was generated in the liquid phase. On day 6, the dry weight was largely composed of organic acids (48%) and 1,3-PDO (17%), which are water-soluble. Degradation of 1,3-PDO was very slow, which is advantageous for recovery. Crude glycerol, which contains alkaline substances, promoted organic matter degradation by microorganisms, which possibly affected biogas and 1,3-PDO production. Addition of 0.630-2.52g/L glycerol initially led to hydrogen production, followed by methane production a few days later, which stabilized within 1week. In conclusion, adjustment of the crude glycerol concentration allows controllable conversion to value-added products for co-digestion.
Collapse
Affiliation(s)
- Kensuke Kurahashi
- Osaka Prefecture University College of Technology, 26-12 Saiwai-cho, Neyagawa, Osaka 572-8572, Japan
| | - Chie Kimura
- Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - You Fujimoto
- Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Hayato Tokumoto
- Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
| |
Collapse
|
33
|
Groeger C, Wang W, Sabra W, Utesch T, Zeng AP. Metabolic and proteomic analyses of product selectivity and redox regulation in Clostridium pasteurianum grown on glycerol under varied iron availability. Microb Cell Fact 2017; 16:64. [PMID: 28424096 PMCID: PMC5395762 DOI: 10.1186/s12934-017-0678-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 04/09/2017] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Clostridium pasteurianum as an emerging new microbial cell factory can produce both n-butanol (BuOH) and 1,3-propanediol (1,3-PDO), and the pattern of product formation changes significantly with the composition of the culture medium. Among others iron content in the medium was shown to strongly affect the products selectivity. However, the mechanism behind this metabolic regulation is still unclear. For a better understanding of such metabolic regulation and for process optimization, we carried out fermentation experiments under either iron excess or iron limitation conditions, and performed metabolic, stoichiometric and proteomic analyses. RESULTS 1,3-PDO is most effectively produced under iron limited condition (Fe-), whereas 1,3-PDO and BuOH were both produced under iron rich condition (Fe+). With increased iron availability the BuOH/1,3-PDO ratio increased significantly from 0.27 mol/mol (at Fe-) to 1.4 mol/mol (at Fe+). Additionally, hydrogen production was enhanced significantly under Fe+ condition. Proteomic analysis revealed differentiated expression of many proteins including several ones of the central carbon metabolic pathway. Among others, pyruvate: ferredoxin oxidoreductase, hydrogenases, and several electron transfer flavoproteins was found to be strongly up-regulated under Fe+ condition, pointing to their strong involvement in the regeneration of the oxidized form of ferredoxin, and consequently their influences on the product selectivity in C. pasteurianum. Of particular significance is the finding that H2 formation in C. pasteurianum is coupled to the ferredoxin-dependent butyryl-CoA dehydrogenase catalyzed reaction, which significantly affects the redox balance and thus the product selectivity. CONCLUSIONS The metabolic, stoichiometric and proteomic results clearly show the key roles of hydrogenases and ferredoxins dependent reactions in determining the internal redox balance and hence product selectivity. Not only the NADH pool but also the regulation of the ferredoxin pool could explain such product variation under different iron conditions.
Collapse
Affiliation(s)
- Christin Groeger
- Institute of Bioprocess and Biosystems Engineering, Hamburg University of Technology, Denickestr.15, 21073 Hamburg, Germany
| | - Wei Wang
- Institute of Bioprocess and Biosystems Engineering, Hamburg University of Technology, Denickestr.15, 21073 Hamburg, Germany
| | - Wael Sabra
- Institute of Bioprocess and Biosystems Engineering, Hamburg University of Technology, Denickestr.15, 21073 Hamburg, Germany
| | - Tyll Utesch
- Institute of Bioprocess and Biosystems Engineering, Hamburg University of Technology, Denickestr.15, 21073 Hamburg, Germany
| | - An-Ping Zeng
- Institute of Bioprocess and Biosystems Engineering, Hamburg University of Technology, Denickestr.15, 21073 Hamburg, Germany
| |
Collapse
|
34
|
Celińska E, Drożdżyńska A, Wita A, Juzwa W, Białas W, Czaczyk K, Grajek W. Group II intron-mediated deletion of lactate dehydrogenase gene in an isolated 1,3-propanediol producer Hafnia alvei AD27. Acta Biochim Pol 2017; 64:123-133. [PMID: 28284024 DOI: 10.18388/abp.2016_1321] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 07/01/2016] [Accepted: 11/14/2016] [Indexed: 11/10/2022]
Abstract
Our previous studies showed that glycerol fermentation by Hafnia alvei AD27 strain was accompanied by formation of high quantities of lactate. The ultimate aim of this work was the elimination of excessive lactate production in the 1,3-propanediol producer cultures. Group II intron-mediated deletion of ldh (lactate dehydrogenase) gene in an environmental isolate of H. alvei AD27 strain was conducted. The effect of the Δldh genotype in H. alvei AD27 strain varied depending on the culture medium applied. Under lower initial glycerol concentration (20 gL-1), lactate and 1,3-propanediol production was fully abolished, and the main carbon flux was directed to ethanol synthesis. On the other hand, at higher initial glycerol concentrations (40 gL-1), 1,3-propanediol and lactate production was recovered in the recombinant strain. The final titers of 1,3-propanediol and ethanol were similar for the recombinant and the WT strains, while the Δldh genotype displayed significantly decreased lactate titer. The by-products profile was altered upon ldh gene deletion, while glycerol utilization and biomass accumulation remained unaltered. As indicated by flow-cytometry analyses, the internal pH was not different for the WT and the recombinant Δldh strains over the culture duration, however, the WT strain was characterized by higher redox potential.
Collapse
Affiliation(s)
- Ewelina Celińska
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, Poznań, Poland
| | - Agnieszka Drożdżyńska
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, Poznań, Poland
| | - Agnieszka Wita
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, Poznań, Poland
| | - Wojciech Juzwa
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, Poznań, Poland
| | - Wojciech Białas
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, Poznań, Poland
| | - Katarzyna Czaczyk
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, Poznań, Poland
| | - Włodzimierz Grajek
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, Poznań, Poland
| |
Collapse
|
35
|
Sankaranarayanan M, Seol E, Kim Y, Chauhan AS, Park S. Measurement of crude-cell-extract glycerol dehydratase activity in recombinant Escherichia coli using coupled-enzyme reactions. J Ind Microbiol Biotechnol 2017; 44:477-488. [PMID: 28093656 DOI: 10.1007/s10295-017-1902-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 01/04/2017] [Indexed: 11/25/2022]
Abstract
Glycerol dehydratase (GDHt), which converts glycerol to 3-hydroxypropionaldehyde, is essential to the production of 1,3-propanediol (1,3-PDO) or 3-hydroxypropionic acid (3-HP). A reliable GDHt activity assay in crude-cell extract was developed. In the assay, GDHt converted 1,2-propanediol (1,2-PDO) to propionaldehyde, which was further converted to 1-propionic acid by aldehyde dehydrogenase (KGSADH) or to 1-propanol by yeast-alcohol dehydrogenase (yADH), while the NADH concentration change was monitored spectrophotometrically. Cells should be disintegrated by Bead Beater/French Press, not by chemical methods (BugBuster®/B-PER™), because the reagents significantly inactivated GDHt and coupling enzymes. Furthermore, in the assay mixture, a much higher activity of KGSADH (>200-fold) or yADH (>400-fold) than that of GDHt should have been maintained. Under optimal conditions, both KGSADH and yADH showed practically the same activity. The coupled-enzyme assay method established here should prove to be applicable to recombinant strains developed for the production of 3-HP and/or 1,3-PDO from glycerol.
Collapse
Affiliation(s)
- Mugesh Sankaranarayanan
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Eunhee Seol
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Yeonhee Kim
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Ashish Singh Chauhan
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Sunghoon Park
- School of Chemical and Biomolecular Engineering, Pusan National University, Busan, 46241, Republic of Korea.
| |
Collapse
|
36
|
Dams RI, Guilherme AA, Vale MS, Nunes VF, Leitão RC, Santaella ST. Fermentation of residual glycerol by Clostridium acetobutylicum ATCC 824 in pure and mixed cultures. Environ Technol 2016; 37:2984-2992. [PMID: 27230401 DOI: 10.1080/09593330.2016.1173114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The aim of this research was to estimate the production of hydrogen, organic acids and alcohols by the strain of Clostridium acetobutylicum ATCC 824 using residual glycerol as a carbon source. The experiments were carried out in pure and mixed cultures in batch experiments. Three different sources of inocula for mixed culture were used. Ruminal liquid from goats and sludge collected from two upflow anaerobic sludge blanket reactors treating municipal wastewater and brewery effluent were tested for hydrogen, organic acids and alcohols production with or without C. acetobutylicum ATCC 824. The main detected end-products from the glycerol fermentation were hydrogen, organic acids (acetic, propionic, butyric and caproic) and alcohol (ethanol and 1,3-propanediol - 1,3PD). High hydrogen (0.44 mol H2/mol glycerol consumed) and 1,3PD (0.32 mol 1,3PD/mol glycerol consumed) yields were obtained when the strain C. acetobutylicum ATCC 824 was bioaugmented into the sludge from municipal wastewater using 5 g/L of glycerol. Significant concentrations of n-caproic acid were detected in the ruminal liquid when amended with C. acetobutylicum ATCC 824. The results suggest that glycerol can be used for the generation of H2, 1,3PD and n-caproic acid using C. acetobutylicum ATCC 824 as agent in pure or mixed cultures.
Collapse
Affiliation(s)
- Rosemeri I Dams
- a Brazilian Agricultural Research Corporation , Embrapa Tropical Agroindustry , Fortaleza , Brazil
| | - Alexandre A Guilherme
- a Brazilian Agricultural Research Corporation , Embrapa Tropical Agroindustry , Fortaleza , Brazil
| | - Maria S Vale
- b Institute of Marine Science, Federal University of Ceará , Fortaleza , Brazil
| | - Vanja F Nunes
- a Brazilian Agricultural Research Corporation , Embrapa Tropical Agroindustry , Fortaleza , Brazil
| | - Renato C Leitão
- a Brazilian Agricultural Research Corporation , Embrapa Tropical Agroindustry , Fortaleza , Brazil
| | - Sandra T Santaella
- b Institute of Marine Science, Federal University of Ceará , Fortaleza , Brazil
| |
Collapse
|
37
|
Kumar V, Durgapal M, Sankaranarayanan M, Somasundar A, Rathnasingh C, Song H, Seung D, Park S. Effects of mutation of 2,3-butanediol formation pathway on glycerol metabolism and 1,3-propanediol production by Klebsiella pneumoniae J2B. Bioresour Technol 2016; 214:432-440. [PMID: 27160953 DOI: 10.1016/j.biortech.2016.04.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 04/08/2016] [Accepted: 04/10/2016] [Indexed: 05/20/2023]
Abstract
The current study investigates the impact of mutation of 2,3-butanediol (BDO) formation pathway on glycerol metabolism and 1,3-propanediol (PDO) production by lactate dehydrogenase deficient mutant of Klebsiella pneumoniae J2B. To this end, BDO pathway genes, budA, budB, budC and budO (whole-bud operon), were deleted from K. pneumoniae J2B ΔldhA and the mutants were studied for glycerol metabolism and alcohols (PDO, BDO) production. ΔbudO-mutant-only could completely abolish BDO production, but with reductions in cell growth and PDO production. By modifying the culture medium, the ΔbudO mutant could recover its performance on the flask scale. However, in bioreactor experiments, the ΔbudO mutant accumulated a significant amount of pyruvate (>73mM) in the late phase and PDO production stopped concomitantly. Glycolytic intermediates of glycerol, especially glyceraldehyde-3-phosphate (G3P) was highly inhibitory to glycerol dehydratase (GDHt); its accumulation, followed by pyruvate accumulation, was assumed to be responsible for the ΔbudO mutant's low PDO production.
Collapse
Affiliation(s)
- Vinod Kumar
- School of Chemical and Biomolecular Engineering, Pusan National University, San 30, Jangeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea; Nottingham BBSRC/EPSRC Synthetic Biology Research Centre, Centre for Biomolecular Sciences, University Park, The University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Meetu Durgapal
- School of Chemical and Biomolecular Engineering, Pusan National University, San 30, Jangeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea
| | - Mugesh Sankaranarayanan
- School of Chemical and Biomolecular Engineering, Pusan National University, San 30, Jangeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea
| | - Ashok Somasundar
- School of Chemical and Biomolecular Engineering, Pusan National University, San 30, Jangeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea
| | - Chelladurai Rathnasingh
- R&D Center, GS Caltex Corporation, 104-4 Munji-dong, Yusung-gu, Daejeon 305-380, Republic of Korea
| | - HyoHak Song
- R&D Center, GS Caltex Corporation, 104-4 Munji-dong, Yusung-gu, Daejeon 305-380, Republic of Korea
| | - Doyoung Seung
- R&D Center, GS Caltex Corporation, 104-4 Munji-dong, Yusung-gu, Daejeon 305-380, Republic of Korea
| | - Sunghoon Park
- School of Chemical and Biomolecular Engineering, Pusan National University, San 30, Jangeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea.
| |
Collapse
|
38
|
Vivek N, Pandey A, Binod P. Biological valorization of pure and crude glycerol into 1,3-propanediol using a novel isolate Lactobacillus brevis N1E9.3.3. Bioresour Technol 2016; 213:222-230. [PMID: 26920628 DOI: 10.1016/j.biortech.2016.02.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 02/04/2016] [Accepted: 02/05/2016] [Indexed: 06/05/2023]
Abstract
The aim of the study was to evaluate a novel onsite enrichment approach to isolate a crude glycerol utilizing facultative anaerobic bacteria. An onsite enrichment in natural conditions resulted an isolate, Lactobacillus brevis N1E9.3.3, that can utilize glycerol and produce 1,3-propanediol with a yield of 0.89g1,3-PDO/gGlycerol and productivity of 0.78g1,3-PDO/l/h at pH-8.5 under anaerobic conditions. Batch fermentation experiments with glycerol-glucose co-fermentation strategy was carried out to evaluate the production of 1,3-propanediol and other byproducts. The effect of other carbon sources as co-substrate was also evaluated. At the optimized condition, 18.6g/l 1,3-propanediol was monitored when biodiesel industry generated crude glycerol and 2.5% glucose were used as the substrate.
Collapse
Affiliation(s)
- Narisetty Vivek
- Biotechnology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-NIIST, Thiruvananthapuram 695019, Kerala, India
| | - Ashok Pandey
- Biotechnology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, Kerala, India
| | - Parameswaran Binod
- Biotechnology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, Kerala, India.
| |
Collapse
|
39
|
Julien-Laferrière A, Bulteau L, Parrot D, Marchetti-Spaccamela A, Stougie L, Vinga S, Mary A, Sagot MF. A Combinatorial Algorithm for Microbial Consortia Synthetic Design. Sci Rep 2016; 6:29182. [PMID: 27373593 PMCID: PMC4931573 DOI: 10.1038/srep29182] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 06/07/2016] [Indexed: 11/16/2022] Open
Abstract
Synthetic biology has boomed since the early 2000s when it started being shown that it was possible to efficiently synthetize compounds of interest in a much more rapid and effective way by using other organisms than those naturally producing them. However, to thus engineer a single organism, often a microbe, to optimise one or a collection of metabolic tasks may lead to difficulties when attempting to obtain a production system that is efficient, or to avoid toxic effects for the recruited microorganism. The idea of using instead a microbial consortium has thus started being developed in the last decade. This was motivated by the fact that such consortia may perform more complicated functions than could single populations and be more robust to environmental fluctuations. Success is however not always guaranteed. In particular, establishing which consortium is best for the production of a given compound or set thereof remains a great challenge. This is the problem we address in this paper. We thus introduce an initial model and a method that enable to propose a consortium to synthetically produce compounds that are either exogenous to it, or are endogenous but where interaction among the species in the consortium could improve the production line.
Collapse
Affiliation(s)
- Alice Julien-Laferrière
- Erable team, INRIA Grenoble Rhône-Alpes, 655 avenue de I’Europe, 38330 Montbonnot-Saint-Martin, France
- University Lyon 1, CNRS UMR 5558, F-69622 Villeurbanne, France
| | - Laurent Bulteau
- Université Paris-Est, LIGM (UMR 8049), CNRS, UPEM, ESIEE Paris, ENPC, F-77454, Marne-la-Vallée, France
| | - Delphine Parrot
- Erable team, INRIA Grenoble Rhône-Alpes, 655 avenue de I’Europe, 38330 Montbonnot-Saint-Martin, France
- University Lyon 1, CNRS UMR 5558, F-69622 Villeurbanne, France
| | - Alberto Marchetti-Spaccamela
- Erable team, INRIA Grenoble Rhône-Alpes, 655 avenue de I’Europe, 38330 Montbonnot-Saint-Martin, France
- Sapienza University of Rome, Italy
| | - Leen Stougie
- Erable team, INRIA Grenoble Rhône-Alpes, 655 avenue de I’Europe, 38330 Montbonnot-Saint-Martin, France
- VU University and CWI, Amsterdam, The Netherlands
| | - Susana Vinga
- IDMEC, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - Arnaud Mary
- Erable team, INRIA Grenoble Rhône-Alpes, 655 avenue de I’Europe, 38330 Montbonnot-Saint-Martin, France
- University Lyon 1, CNRS UMR 5558, F-69622 Villeurbanne, France
| | - Marie-France Sagot
- Erable team, INRIA Grenoble Rhône-Alpes, 655 avenue de I’Europe, 38330 Montbonnot-Saint-Martin, France
- University Lyon 1, CNRS UMR 5558, F-69622 Villeurbanne, France
| |
Collapse
|
40
|
Wischral D, Zhang J, Cheng C, Lin M, De Souza LMG, Pessoa FLP, Pereira N, Yang ST. Production of 1,3-propanediol by Clostridium beijerinckii DSM 791 from crude glycerol and corn steep liquor: Process optimization and metabolic engineering. Bioresour Technol 2016; 212:100-110. [PMID: 27085150 DOI: 10.1016/j.biortech.2016.04.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 04/04/2016] [Accepted: 04/05/2016] [Indexed: 05/23/2023]
Abstract
1,3-Propanediol (1,3-PDO) production from crude glycerol, a byproduct from biodiesel manufacturing, by Clostridium beijerinckii DSM 791 was studied with corn steep liquor as an inexpensive nitrogen source replacing yeast extract in the fermentation medium. A stable, long-term 1,3-PDO production from glycerol was demonstrated with cells immobilized in a fibrous bed bioreactor operated in a repeated batch mode, which partially circumvented the 1,3-PDO inhibition problem. The strain was then engineered to overexpress Escherichia coli gldA encoding glycerol dehydrogenase (GDH) and dhaKLM encoding dihydroxyacetone kinase (DHAK), which increased 1,3-PDO productivity by 26.8-37.5% compared to the wild type, because of greatly increased specific growth rate (0.25-0.40h(-1) vs. 0.13-0.20h(-1) for the wild type). The engineered strain gave a high 1,3-PDO titer (26.1g/L), yield (0.55g/g) and productivity (0.99g/L·h) in fed-batch fermentation. Overexpressing GDH and DHAK was thus effective in increasing 1,3-PDO production from glycerol.
Collapse
Affiliation(s)
- Daiana Wischral
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210, USA; School of Chemistry, Department of Biochemical Engineering, Federal University of Rio de Janeiro, Av. Horácio Macedo 2030, Bloco E., Rio de Janeiro, RJ 21949-900, Brazil
| | - Jianzhi Zhang
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210, USA
| | - Chi Cheng
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210, USA
| | - Meng Lin
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210, USA
| | - Lucas Monteiro Galotti De Souza
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210, USA
| | - Fernando L Pellegrini Pessoa
- School of Chemistry, Department of Chemical Engineering, Federal University of Rio de Janeiro, Av. Horácio Macedo 2030, Bloco E., Rio de Janeiro, RJ 21949-900, Brazil
| | - Nei Pereira
- School of Chemistry, Department of Biochemical Engineering, Federal University of Rio de Janeiro, Av. Horácio Macedo 2030, Bloco E., Rio de Janeiro, RJ 21949-900, Brazil
| | - Shang-Tian Yang
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 West Woodruff Avenue, Columbus, OH 43210, USA.
| |
Collapse
|
41
|
Zhu C, Fang B, Wang S. Effects of culture conditions on the kinetic behavior of 1,3-propanediol fermentation by Clostridium butyricum with a kinetic model. Bioresour Technol 2016; 212:130-137. [PMID: 27089428 DOI: 10.1016/j.biortech.2016.04.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 04/05/2016] [Accepted: 04/06/2016] [Indexed: 06/05/2023]
Abstract
The effects of culture conditions on the kinetic behavior of 1,3-propanediol (PD) fermentation were investigated with a kinetic model. First, with initial glycerol concentration (S0) increasing, μmax and PD inhibition increased. Glycerol assimilation was harder and a little glycerol was consumed on cell maintenance at high S0. Second, with yeast extract concentration increasing, PD inhibition decreased. However, μmax decreased and glycerol assimilation became harder. It seems that the stimulus effect of yeast extract resulted from decreased PD inhibition. Glycerol amount consumed on cell maintenance also decreased. Third, with temperature decreasing, μmax and PD inhibition decreased. Glycerol assimilation was harder and a little more glycerol was consumed on cell maintenance at low temperature. Fourth, with pH increasing, μmax and PD inhibition decreased. Glycerol assimilation was harder and much more glycerol was consumed on cell maintenance at pH 6.5 and 7.5 than 7.0. This work facilitates further fermentation process optimization.
Collapse
Affiliation(s)
- Chunjie Zhu
- School of Biological and Chemical Engineering, Jiangsu Food and Pharmaceutical Science College, Huai'an, Jiangsu 223003, China
| | - Baishan Fang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China; The Key Laboratory for Synthetic Biotechnology of Xiamen City, Xiamen University, Xiamen, Fujian 361005, China; National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Ester, Xiamen University, Xiamen, Fujian 361005, China; The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, Fujian 361005, China.
| | - Shizhen Wang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China; The Key Laboratory for Synthetic Biotechnology of Xiamen City, Xiamen University, Xiamen, Fujian 361005, China
| |
Collapse
|
42
|
Johnson EE, Rehmann L. The role of 1,3-propanediol production in fermentation of glycerol by Clostridium pasteurianum. Bioresour Technol 2016; 209:1-7. [PMID: 26946434 DOI: 10.1016/j.biortech.2016.02.088] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 02/18/2016] [Accepted: 02/20/2016] [Indexed: 06/05/2023]
Abstract
Waste crude glycerol from biodiesel production can be used to produce biobutanol using Clostridium pasteurianum with the main products being n-butanol, 1,3-propanediol (PDO) and ethanol. There has been much discrepancy and mystery around the cause and effect of process parameters on the product distribution, thus a better understanding of the pathway regulation is required. This study shows that as process pH decreased, the rate of cell growth and CO2 production also decreased, resulting in slower fermentations, increased duration of butanol production and higher butanol concentrations and yields. The production rate of PDO was multi-modal and the role of PDO appears to function in redox homeostasis. The results also showed that C. pasteurianum displayed little biphasic behavior when compared to Clostridia spp. typically used in ABE fermentation due to the alternative glycolysis-independent reductive pathway of PDO production, rendering it suitable for a continuous fermentation process.
Collapse
Affiliation(s)
- Erin E Johnson
- Department of Chemical & Biochemical Engineering, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 3K7, Canada
| | - Lars Rehmann
- Department of Chemical & Biochemical Engineering, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 3K7, Canada; Department of Biochemical Engineering, AVT - Aachener Verfahrenstechnik, RWTH Aachen University, Worringer Weg 1, 52074 Aachen, Germany.
| |
Collapse
|
43
|
Rodriguez A, Wojtusik M, Ripoll V, Santos VE, Garcia-Ochoa F. 1,3-Propanediol production from glycerol with a novel biocatalyst Shimwellia blattae ATCC 33430: Operational conditions and kinetics in batch cultivations. Bioresour Technol 2016; 200:830-7. [PMID: 26590757 DOI: 10.1016/j.biortech.2015.10.061] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 10/16/2015] [Accepted: 10/17/2015] [Indexed: 05/21/2023]
Abstract
Shimwellia blattae ATCC 33430 as biocatalyst in the conversion of 1,3-propanediol from glycerol is herein evaluated. Several operational conditions in batch cultivations, employing pure and raw glycerol as sole carbon source, were studied. Temperature was studied at shaken bottle scale, while pH control strategy, together with the influence of raw glycerol and its impurities during fermentation were studied employing a 2L STBR. Thereafter, fluid dynamic conditions were considered by changing the stirring speed and the gas supply (air or nitrogen) in the same scale-up experiments. The best results were obtained at a temperature of 37°C, an agitation rate of 200rpm, with free pH evolution from 6.9 and subsequent control at 6.5 and no gas supply during the fermentation, employing an initial concentration of 30g/L of raw glycerol. Under these conditions, the biocatalyst is competitive, leading to results in line with other previous works in the literature in batch conditions, reaching a final concentration of 1,3-propanediol of 13.84g/L, with a yield of 0.45g/g and a productivity of 1.19g/(Lh) from raw glycerol.
Collapse
Affiliation(s)
- Alberto Rodriguez
- Department of Chemical Engineering, Faculty of Chemistry, University Complutense of Madrid, Spain
| | - Mateusz Wojtusik
- Department of Chemical Engineering, Faculty of Chemistry, University Complutense of Madrid, Spain
| | - Vanessa Ripoll
- Department of Chemical Engineering, Faculty of Chemistry, University Complutense of Madrid, Spain
| | - Victoria E Santos
- Department of Chemical Engineering, Faculty of Chemistry, University Complutense of Madrid, Spain.
| | - F Garcia-Ochoa
- Department of Chemical Engineering, Faculty of Chemistry, University Complutense of Madrid, Spain
| |
Collapse
|
44
|
Kaur G, Srivastava AK, Chand S. Debottlenecking product inhibition in 1,3-propanediol fermentation by In-Situ Product Recovery. Bioresour Technol 2015; 197:451-457. [PMID: 26356117 DOI: 10.1016/j.biortech.2015.08.101] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 08/21/2015] [Accepted: 08/22/2015] [Indexed: 06/05/2023]
Abstract
The present work describes the application of liquid-liquid extraction as an In-Situ product recovery (ISPR) technique to overcome the problem of product inhibition in 1,3-PD fermentation. As a part of initial screening experiments, six solvents were subjected to phase separation and biocompatibility tests to find the best extractant for in-situ removal of 1,3-PD from the bioreactor. These included tributylphosphate, ethyl acetate, butyl acetate, oleyl alcohol, oleic acid and hexanol. Of these, ethyl acetate was found to be the most suitable solvent for 1,3-PD extraction. Use of the selected extractant in continuous integrated fermentation-extraction was established by batch and fed-batch extractive fermentations which demonstrated a significantly improved 1,3-PD production of 35g/L and 74.5g/L, respectively. A steady state 1,3-PD concentration of 58g/L was obtained in continuous extractive system. Continuous cultivation with in-situ cell retention and in-situ 1,3-PD removal demonstrated a 5-fold enhancement in 1,3-PD productivity over non-extractive batch.
Collapse
Affiliation(s)
- Guneet Kaur
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - A K Srivastava
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| | - Subhash Chand
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| |
Collapse
|
45
|
Dounavis AS, Ntaikou I, Lyberatos G. Production of biohydrogen from crude glycerol in an upflow column bioreactor. Bioresour Technol 2015; 198:701-708. [PMID: 26441027 DOI: 10.1016/j.biortech.2015.09.072] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 09/15/2015] [Accepted: 09/20/2015] [Indexed: 06/05/2023]
Abstract
A continuous attached growth process for the production of biohydrogen from crude glycerol was developed. The process consisted of an anaerobic up-flow column bioreactor (UFCB), packed with cylindrical ceramic beads, which constituted the support matrix for the attachment of bacterial cells. The effect of crude glycerol concentration, pH and hydraulic retention time on glycerol conversion, hydrogen yield and metabolite distribution was investigated. It was shown that the most critical parameter for the efficient bioconversion was the pH of the influent, whereas the hydrogen yield increased with an increase in feed glycerol concentration and a decrease in the hydraulic retention time. The main soluble metabolite detected was 1,3-propanediol in all cases, followed by butyric and hexanoic acids. The latter is reported to be produced from glycerol for the first time. Acidification of the waste reached 38.5%, and the maximum H2 productivity was 107.3 ± 0.7 L/kg waste glycerol at optimal conditions.
Collapse
Affiliation(s)
- Athanasios S Dounavis
- Institute of Chemical Engineering Sciences, 265 04 Patras, Greece; Department of Chemical Engineering, University of Patras, 265 00 Patras, Greece
| | - Ioanna Ntaikou
- Institute of Chemical Engineering Sciences, 265 04 Patras, Greece.
| | - Gerasimos Lyberatos
- Institute of Chemical Engineering Sciences, 265 04 Patras, Greece; School of Chemical Engineering, National Technical University of Athens, Zografou Campus, 157072 Athens, Greece
| |
Collapse
|
46
|
Zangi-Kotler M, Ben-Dov E, Tiehm A, Kushmaro A. Microbial community structure and dynamics in a membrane bioreactor supplemented with the flame retardant dibromoneopentyl glycol. Environ Sci Pollut Res Int 2015; 22:17615-17624. [PMID: 26146373 DOI: 10.1007/s11356-015-4975-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 06/29/2015] [Indexed: 06/04/2023]
Abstract
Brominated flame retardants (BFRs) are a group of widely used compounds that, due to their limited biodegradability, exhibit excessive persistence in the environment. The persistence and high toxicity of these compounds to the natural biota causes great environmental concern. We investigated the biodegradation of the BFR dibromoneopentyl glycol (DBNPG) under continuous culture conditions using a miniature membrane bioreactor (mMBR) to assess its feasibility as a bioremediation approach. This system demonstrated long-term, stable biodegradation of DBNPG (>90 days), with an average removal rate of about 50%. Pyrosequencing of the 16S rRNA gene of the microorganisms involved in this process revealed the dominance of reads affiliated with the genus Brevundimonas of the Alphaproteobacteria class during the different mMBR operational stages. The bacterial community was also dominated by reads affiliated with the Sinorhizobium and Sphingopyxis genera within the Alphaproteobacteria class and the Sediminibacterium genus of the Sphingobacteria class. Real-time PCR used to analyze possible changes in the population dynamics of these four dominant groups revealed their consistent presence throughout the long-term mMBR biodegradation activity. Two genera, Brevundimonas and Sphingopyxis, were found to increase in abundance during the acclimation period and then remained relatively stable, forming the main parts of the consortium over the prolonged active stage.
Collapse
Affiliation(s)
- Moran Zangi-Kotler
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, P.O. Box 653, 8410501, Beer-Sheva, Israel
| | - Eitan Ben-Dov
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, P.O. Box 653, 8410501, Beer-Sheva, Israel
- Achva Academic College, 7980400, M.P. Shikmim, Israel
| | - Andreas Tiehm
- DVGW-Technologiezentrum Wasser (TZW), Karlsruher Straße 84, 76139, Karlsruhe, Germany
| | - Ariel Kushmaro
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, P.O. Box 653, 8410501, Beer-Sheva, Israel.
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore.
| |
Collapse
|
47
|
Tabah B, Pulidindi IN, Chitturi VR, Arava LMR, Gedanken A. Solar-Energy Driven Simultaneous Saccharification and Fermentation of Starch to Bioethanol for Fuel-Cell Applications. ChemSusChem 2015; 8:3497-3503. [PMID: 26350032 DOI: 10.1002/cssc.201500469] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 07/12/2015] [Indexed: 06/05/2023]
Abstract
A solar reactor was designed to perform the conversion of starch to ethanol in a single step. An aqueous starch solution (5 wt %) was fed into the reactor bed charged with Baker's yeast (Saccharomyces cerevisiae) and amylase, resulting in approximately 2.5 wt % ethanol collected daily (ca. 25 mL day(-1) ). A significant amount of ethanol (38 g) was collected over 63 days, corresponding to 84 % of the theoretical yield. The production of ethanol without additional energy input highlights the significance of this new process. The ethanol produced was also demonstrated as a potential fuel for direct ethanol fuel cells. Additionally, the secondary metabolite glycerol was fully reduced to a value-added product 1,3-propanediol, which is the first example of a fungal strain (Baker's yeast) converting glycerol in situ to 1,3-propanediol.
Collapse
Affiliation(s)
- Betina Tabah
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | | | | | | | - Aharon Gedanken
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 52900, Israel.
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan, 70101, Taiwan.
| |
Collapse
|
48
|
Huang J, Chen Z, Sun Y, Liu D. [Automatically feeding strategy for 1,3-propanediol fermentation of Klebsiella pneumoniae LDH526]. Sheng Wu Gong Cheng Xue Bao 2015; 31:1520-1527. [PMID: 26964341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
1,3-propanediol is an important chemical used as building block for the synthesis of highly promising polyesters such as polytrimethylene terephthalate. A genetically modified Klebsiella pneumoniae LDH526 can use glycerol as sole carbon source and produce 1,3-propanediol with the titer above 90 g/L. A key factor affecting the production of 1,3-propanediol by the mutant K. pneumoniae is the accurate control of the feeding of glycerol. To generate a robust and reproducible fermentation process of 1,3-propanediol, we designed and optimized an automatically feeding strategy of glycerol based on fermentation kinetics. By coupling the substrate feeding rate with easily observed variables -pH and fermentation time, we have achieved self-starting glycerol feeding and dynamic control of the glycerol concentration during the fermentation process. This automated system allowed us to generate a reproducible, consistent and operator-independent process from lab-scale to production scale. The final concentration of 1,3-propanediol was above 95 g/L after 72 h.
Collapse
|
49
|
Pachapur VL, Sarma SJ, Brar SK, Le Bihan Y, Buelna G, Verma M. Biohydrogen production by co-fermentation of crude glycerol and apple pomace hydrolysate using co-culture of Enterobacter aerogenes and Clostridium butyricum. Bioresour Technol 2015; 193:297-306. [PMID: 26142996 DOI: 10.1016/j.biortech.2015.06.095] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 05/29/2015] [Accepted: 06/20/2015] [Indexed: 06/04/2023]
Abstract
Co-substrate utilization of various wastes with complementary characteristics can provide a complete medium for higher hydrogen production. This study evaluated potential of apple pomace hydrolysate (APH) co-fermented with crude glycerol (CG) for increased H2 production and decreased by-products formation. The central composite design (CCD) along with response surface methodology (RSM) was used as tool for optimization and 15 g/L of CG, 5 g/L of APH and 15% (v/v) inoculum were found to be optimum to produce as high as 26.07 ± 1.57 mmol H2/L of medium. The p-value of 0.0017 indicated that APH at lower concentration had a significant effect on H2 production. By using CG as sole carbon source, reductive pathway of glycerol metabolism was favored with 19.46 mmol H2/L. However, with APH, oxidative pathway was favored with higher H2 production (26.07 ± 1.57 mmol/L) and decrease in reduced by-products (1,3-propanediol and ethanol) formation. APH inclusion enhanced H2 production, and decreased substrate inhibition.
Collapse
Affiliation(s)
- Vinayak Laxman Pachapur
- Institut National de la Recherche Scientifique, Centre - Eau Terre Environnement, 490, Rue de la Couronne, Québec, QC G1K 9A9, Canada
| | - Saurabh Jyoti Sarma
- Institut National de la Recherche Scientifique, Centre - Eau Terre Environnement, 490, Rue de la Couronne, Québec, QC G1K 9A9, Canada
| | - Satinder Kaur Brar
- Institut National de la Recherche Scientifique, Centre - Eau Terre Environnement, 490, Rue de la Couronne, Québec, QC G1K 9A9, Canada.
| | - Yann Le Bihan
- Centre de Recherche Industrielle du Québec (CRIQ), Québec, QC, Canada
| | - Gerardo Buelna
- Centre de Recherche Industrielle du Québec (CRIQ), Québec, QC, Canada
| | - Mausam Verma
- CO(2) Solutions Inc., 2300, Rue Jean-Perrin, Québec, QC G2C 1T9, Canada
| |
Collapse
|
50
|
Hanes RJ, Cruze NB, Goel PK, Bakshi BR. Allocation Games: Addressing the Ill-Posed Nature of Allocation in Life-Cycle Inventories. Environ Sci Technol 2015; 49:7996-8003. [PMID: 26061700 DOI: 10.1021/acs.est.5b01192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Allocation is required when a life cycle contains multi-functional processes. One approach to allocation is to partition the embodied resources in proportion to a criterion, such as product mass or cost. Many practitioners apply multiple partitioning criteria to avoid choosing one arbitrarily. However, life cycle results from different allocation methods frequently contradict each other, making it difficult or impossible for the practitioner to draw any meaningful conclusions from the study. Using the matrix notation for life-cycle inventory data, we show that an inventory that requires allocation leads to an ill-posed problem: an inventory based on allocation is one of an infinite number of inventories that are highly dependent upon allocation methods. This insight is applied to comparative life-cycle assessment (LCA), in which products with the same function but different life cycles are compared. Recently, there have been several studies that applied multiple allocation methods and found that different products were preferred under different methods. We develop the Comprehensive Allocation Investigation Strategy (CAIS) to examine any given inventory under all possible allocation decisions, enabling us to detect comparisons that are not robust to allocation, even when the comparison appears robust under conventional partitioning methods. While CAIS does not solve the ill-posed problem, it provides a systematic way to parametrize and examine the effects of partitioning allocation. The practical usefulness of this approach is demonstrated with two case studies. The first compares ethanol produced from corn stover hydrolysis, corn stover gasification, and corn grain fermentation. This comparison was not robust to allocation. The second case study compares 1,3-propanediol (PDO) produced from fossil fuels and from biomass, which was found to be a robust comparison.
Collapse
Affiliation(s)
| | - Nathan B Cruze
- ‡United States Department of Agriculture (USDA) National Agricultural Statistics Service (NASS), Washington, D.C. 20004, United States
| | | | | |
Collapse
|