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Palomino TV, Muddiman DC. Mass spectrometry imaging of N-linked glycans: Fundamentals and recent advances. MASS SPECTROMETRY REVIEWS 2024. [PMID: 38934211 DOI: 10.1002/mas.21895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 06/06/2024] [Accepted: 06/09/2024] [Indexed: 06/28/2024]
Abstract
With implications in several medical conditions, N-linked glycosylation is one of the most important posttranslation modifications present in all living organisms. Due to their nontemplate synthesis, glycan structures are extraordinarily complex and require multiple analytical techniques for complete structural elucidation. Mass spectrometry is the most common way to investigate N-linked glycans; however, with techniques such as liquid-chromatography mass spectrometry, there is complete loss of spatial information. Mass spectrometry imaging is a transformative analytical technique that can visualize the spatial distribution of ions within a biological sample and has been shown to be a powerful tool to investigate N-linked glycosylation. This review covers the fundamentals of mass spectrometry imaging and N-linked glycosylation and highlights important findings of recent key studies aimed at expanding and improving the glycomics imaging field.
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Affiliation(s)
- Tana V Palomino
- FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, North Carolina, USA
| | - David C Muddiman
- FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, North Carolina, USA
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2
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Singh M, Singh G, Kaur H, Muskan, Kumar S, Aswal VK, Kang TS. Self-assembly of choline-based surface-active ionic liquids and concentration-dependent enhancement in the enzymatic activity of cellulase in aqueous medium. Phys Chem Chem Phys 2024; 26:16218-16233. [PMID: 38804505 DOI: 10.1039/d4cp01236d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
The micellization of choline-based anionic surface-active ionic liquids (SAILs) having lauroyl sarcosinate [Sar]-, dodecylsulfate [DS]-, and deoxycholate [Doc]- as counter-ions was investigated in an aqueous medium. Density functional theory (DFT) was employed to investigate the net interactional energy (Enet), extent of non-covalent interactions, and band gap of the choline-based SAILs. The critical micelle concentration (cmc) along with various parameters related to the surface adsorption, counter-ion binding (β), and polarity of the cores of the micelles were deduced employing surface tension measurements, conductometric titrations and fluorescence spectroscopy, respectively. A dynamic light scattering (DLS) system equipped with zeta-potential measurement set-up and small-angle neutron scattering (SANS) were used to predict the size, zeta-potential, and morphology, respectively, of the formed micelles. Thermodynamic parameters such as standard Gibb's free energy and standard enthalpy change of micellization were calculated using isothermal titration calorimetry (ITC). Upon comparing with sodium salt analogues, it was established that the micellization was predominantly governed by the extent of hydration of [Cho]+, the head groups of the respective anions, and the degree of counter-ion binding (β). Considering the concentration dependence of the enzyme-SAIL interactions, aqueous solutions of the synthesized SAILs at two different concentrations (below and above the cmc) were utilized as the medium for testing the enzymatic activity of cellulase. The activity of cellulase was found to be ∼7- to ∼13-fold higher compared to that observed in buffers in monomeric solutions of the SAILs and followed the order: [Cho][Sar] > [Cho][DS] > [Cho][Doc]. In the micellar solution, a ∼4- to 5-fold increase in enzymatic activity was observed.
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Affiliation(s)
- Manpreet Singh
- Department of Chemistry, UGC-Centre for Advance Studies - II, Guru Nanak Dev University, Amritsar, 143005, India.
| | - Gurbir Singh
- Department of Chemistry, UGC-Centre for Advance Studies - II, Guru Nanak Dev University, Amritsar, 143005, India.
| | - Harmandeep Kaur
- Department of Chemistry, UGC-Centre for Advance Studies - II, Guru Nanak Dev University, Amritsar, 143005, India.
| | - Muskan
- Department of Chemistry, UGC-Centre for Advance Studies - II, Guru Nanak Dev University, Amritsar, 143005, India.
| | - Sugam Kumar
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Vinod Kumar Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Tejwant Singh Kang
- Department of Chemistry, UGC-Centre for Advance Studies - II, Guru Nanak Dev University, Amritsar, 143005, India.
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3
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Zhang L, Dai W, Rong S, Schwaneberg U, Xu G, Ni Y. Engineering diaryl alcohol dehydrogenase KpADH reveals importance of retaining hydration shell in organic solvent tolerance. Protein Sci 2024; 33:e4933. [PMID: 38501647 PMCID: PMC10949390 DOI: 10.1002/pro.4933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/27/2024] [Accepted: 02/01/2024] [Indexed: 03/20/2024]
Abstract
Alcohol dehydrogenases (ADHs) are synthetically important biocatalysts for the asymmetric synthesis of chiral alcohols. The catalytic performance of ADHs in the presence of organic solvents is often important since most prochiral ketones are highly hydrophobic. Here, the organic solvent tolerance of KpADH from Kluyveromyces polyspora was semi-rationally evolved. Using tolerant variants obtained, meticulous experiments and computational studies were conducted to explore properties including stability, activity and kinetics in the presence of various organic solvents. Compared with WT, variant V231D exhibited 1.9-fold improvement in ethanol tolerance, while S237G showed a 6-fold increase in catalytic efficiency, a higherT 50 15 $$ {\mathrm{T}}_{50}^{15} $$ , as well as 15% higher tolerance in 7.5% (v/v) ethanol. Based on 3 × 100 ns MD simulations, the increased tolerance of V231D and S237G against ethanol may be ascribed to their enhanced ability in retaining water molecules and repelling ethanol molecules. Moreover, 6.3-fold decreased KM value of V231D toward hydrophilic ketone substrate confirmed its capability of retaining hydration shell. Our results suggest that retaining hydration shell surrounding KpADH is critical for its tolerance to organic solvents, as well as catalytic performance. This study provides useful guidance for engineering organic solvent tolerance of KpADH and other ADHs.
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Affiliation(s)
- Lu Zhang
- Key Laboratory of Industrial Biotechnology, Ministry of EducationSchool of Biotechnology, Jiangnan UniversityWuxiChina
| | - Wei Dai
- Key Laboratory of Industrial Biotechnology, Ministry of EducationSchool of Biotechnology, Jiangnan UniversityWuxiChina
| | - Shuo Rong
- Key Laboratory of Industrial Biotechnology, Ministry of EducationSchool of Biotechnology, Jiangnan UniversityWuxiChina
| | | | - Guochao Xu
- Key Laboratory of Industrial Biotechnology, Ministry of EducationSchool of Biotechnology, Jiangnan UniversityWuxiChina
| | - Ye Ni
- Key Laboratory of Industrial Biotechnology, Ministry of EducationSchool of Biotechnology, Jiangnan UniversityWuxiChina
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4
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Barakat H, Al-Qabba MM, Algonaiman R, Radhi KS, Almutairi AS, Al Zhrani MM, Mohamed A. Impact of Sprouting Process on the Protein Quality of Yellow and Red Quinoa ( Chenopodium quinoa). Molecules 2024; 29:404. [PMID: 38257317 PMCID: PMC10821386 DOI: 10.3390/molecules29020404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/03/2024] [Accepted: 01/09/2024] [Indexed: 01/24/2024] Open
Abstract
The demand for plant-based proteins has increased remarkably over the last decade. Expanding the availability and variety of plant-based protein options has shown positive potential. This study aimed to investigate the qualitative and quantitative changes in amino acids of yellow and red quinoa seeds (YQ and RQ) during a 9-day germination period. The results showed that the germination process led to an increase in the total amino acids by 7.43% and 14.36% in the YQ and RQ, respectively. Both varieties exhibited significant (p < 0.05) increases in non-essential and essential amino acids, including lysine, phenylalanine, threonine, and tyrosine. The content of non-essential amino acids nearly reached the standard values found in chicken eggs. These results were likely attributed to the impact of the germination process in increasing enzymes activity and decreasing anti-nutrient content (e.g., saponins). A linear relationship between increased seeds' hydration and decreased saponins content was observed, indicating the effect of water absorption in changing the chemical composition of the plant. Both sprouts showed positive germination progression; however, the sprouted RQ showed a higher germination rate than the YQ (57.67% vs. 43.33%, respectively). Overall, this study demonstrates that germination is a promising technique for enhancing the nutritional value of quinoa seeds, delivering sprouted quinoa seeds as a highly recommended source of high-protein grains with notable functional properties.
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Affiliation(s)
- Hassan Barakat
- Department of Food Science and Human Nutrition, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah 51452, Saudi Arabia
- Department of Food Technology, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt
| | - Maryam M. Al-Qabba
- Maternity and Children Hospital, Qassim Health Cluster, Ministry of Health, Buraydah 52384, Saudi Arabia;
| | - Raya Algonaiman
- Department of Food Science and Human Nutrition, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah 51452, Saudi Arabia
| | - Khadija S. Radhi
- Department of Food Science and Nutrition, College of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Abdulkarim S. Almutairi
- Al Rass General Hospital, Qassim Health Cluster, Ministry of Health, Ibn Sina Street, King Khalid District, Al Rass 58883, Saudi Arabia;
| | - Muath M. Al Zhrani
- Department of Applied Medical Science, College of Applied, Bishah University, Bishah 67714, Saudi Arabia;
| | - Ahmed Mohamed
- Department of Biochemistry, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt;
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5
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Salazar-Alekseyeva K, Herndl GJ, Baltar F. Release of cell-free enzymes by marine pelagic fungal strains. FRONTIERS IN FUNGAL BIOLOGY 2023; 4:1209265. [PMID: 38025900 PMCID: PMC10658710 DOI: 10.3389/ffunb.2023.1209265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 09/22/2023] [Indexed: 12/01/2023]
Abstract
Fungi are ubiquitous organisms that secrete different enzymes to cleave large molecules into smaller ones so that can then be assimilated. Recent studies suggest that fungi are also present in the oceanic water column harboring the enzymatic repertoire necessary to cleave carbohydrates and proteins. In marine prokaryotes, the cell-free fraction is an important contributor to the oceanic extracellular enzymatic activities (EEAs), but the release of cell-free enzymes by marine fungi remains unknown. Here, to study the cell-free enzymatic activities of marine fungi and the potential influence of salinity on them, five strains of marine fungi that belong to the most abundant pelagic phyla (Ascomycota and Basidiomycota), were grown under non-saline and saline conditions (0 g/L and 35 g/L, respectively). The biomass was separated from the medium by filtration (0.2 μm), and the filtrate was used to perform fluorogenic enzymatic assays with substrate analogues of carbohydrates, lipids, organic phosphorus, sulfur moieties, and proteins. Kinetic parameters such as maximum velocity (Vmax) and half-saturation constant (Km) were obtained. The species studied were able to release cell-free enzymes, and this represented up to 85.1% of the respective total EEA. However, this differed between species and enzymes, with some of the highest contributions being found in those with low total EEA, with some exceptions. This suggests that some of these contributions to the enzymatic pool might be minimal compared to those with higher total EEA. Generally, in the saline medium, the release of cell-free enzymes degrading carbohydrates was reduced compared to the non-saline medium, but those degrading lipids and sulfur moieties were increased. For the remaining substrates, there was not a clear influence of the salinity. Taken together, our results suggest that marine fungi are potential contributors to the oceanic dissolved (i.e., cell-free) enzymatic pool. Our results also suggest that, under salinity changes, a potential effect of global warming, the hydrolysis of organic matter by marine fungal cell-free enzymes might be affected and hence, their potential contribution to the oceanic biogeochemical cycles.
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Affiliation(s)
- Katherine Salazar-Alekseyeva
- Department of Functional and Evolutionary Ecology, Bio-Oceanography and Marine Biology Unit, University of Vienna, Vienna, Austria
- Department of Agrotechnology and Food Sciences, Bioprocess Engineering Group, Wageningen University and Research, Wageningen, Netherlands
| | - Gerhard J. Herndl
- Department of Functional and Evolutionary Ecology, Bio-Oceanography and Marine Biology Unit, University of Vienna, Vienna, Austria
- Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ), University of Utrecht, Texel, Netherlands
| | - Federico Baltar
- Department of Functional and Evolutionary Ecology, Bio-Oceanography and Marine Biology Unit, University of Vienna, Vienna, Austria
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6
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Duangsi R, Krongyut W. Stabilization of Rice Bran by Infrared Radiation Heating for Increased Resilience and Quality of Rice Bran Oil Production. Prev Nutr Food Sci 2023; 28:189-199. [PMID: 37416791 PMCID: PMC10321441 DOI: 10.3746/pnf.2023.28.2.189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/21/2023] [Accepted: 04/24/2023] [Indexed: 07/08/2023] Open
Abstract
Rice bran, a by-product of rice milling, is a valuable source of rice bran oil (RBO). However, it is prone to rancidity and must be processed quickly after rice polishing. The researchers found that rice bran stabilization with infrared radiation (IR) at 125 V and 135 V for 5∼10 min. The most promising IR treatments were 125 V for 10 min and 135 V for 5 min, which resulted in the lowest lipase activity (93∼96% inhibition) and levels of γ-oryzanol and α-tocopherol comparable to those of the untreated control. However, the color of rice bran and RBO based on L*, a*, b*, and total color difference (ΔE) and Gardner-20 mm index darkened. Upon storage of rice bran at 38°C for 8 weeks, the use of these two IR treatments completely inhibited the rise in free fatty acid (FFA) content and peroxide values throughout the storage period. In contrast, the control had a pre-storage FFA more than double that of IR-stabilized rice bran, which further increased during storage and, in the 8th week, was more than 6-fold higher than the pre-storage level. γ-oryzanol and α-tocopherol slightly decreased with storage and their levels did not differ between stabilized and unstabilized rice bran. RBO color darkening was again observed, but the color lightened with storage, especially upon treatment at 135 V for 5 min. In contrast, the color of control RBO darkened with storage. Thus, IR at 135 V for 5 min was the most promising method for rice bran stabilization, based on which commercial IR treatment instruments can be developed.
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Affiliation(s)
- Rachen Duangsi
- Program in Food Technology, Faculty of Agriculture, Ubon Ratchathani Rajabhat University, Ubon Ratchathani 34000, Thailand
| | - Wiraya Krongyut
- Program in Agriculture, Faculty of Agriculture, Ubon Ratchathani Rajabhat University, Ubon Ratchathani 34000, Thailand
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7
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Gutiérrez López MÁ, Tan ML, Frontera A, Matile S. The Origin of Anion-π Autocatalysis. JACS AU 2023; 3:1039-1051. [PMID: 37124310 PMCID: PMC10131205 DOI: 10.1021/jacsau.2c00656] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 02/09/2023] [Accepted: 02/17/2023] [Indexed: 05/03/2023]
Abstract
The autocatalysis of epoxide-opening ether cyclizations on the aromatic surface of anion-π catalysts stands out as a leading example of emergent properties expected from the integration of unorthodox interactions into catalysis. A working hypothesis was proposed early on, but the mechanism of anion-π autocatalysis has never been elucidated. Here, we show that anion-π autocatalysis is almost independent of peripheral crowding in substrate and product. Inaccessible asymmetric anion-π autocatalysis and sometimes erratic reproducibility further support that the origin of anion-π autocatalysis is more complex than originally assumed. The apparent long-distance communication without physical contact calls for the inclusion of water between substrate and product on the catalytic aromatic surface. Efficient anion-π autocatalysis around equimolar amounts but poor activity in dry solvents and with excess water indicate that this inclusion of water requires high precision. Computational models suggest that two water molecules transmit dual substrate activation by the product and serve as proton shuttles along antiparallel but decoupled hydrogen-bonded chains to delocalize and stabilize evolving charge density in the transition state by "anion-π double bonds". This new transition-state model of anion-π autocatalysis provides a plausible mechanism that explains experimental results and brings anion-π catalysis to an unprecedented level of sophistication.
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Affiliation(s)
- M. Ángeles Gutiérrez López
- Department
of Organic Chemistry, University of Geneva, CH-1211 Geneva, Switzerland
- National
Centre of Competence in Research (NCCR) Molecular Systems Engineering
(MSE), CH-4002 Basel, Switzerland
| | - Mei-Ling Tan
- Department
of Organic Chemistry, University of Geneva, CH-1211 Geneva, Switzerland
- National
Centre of Competence in Research (NCCR) Molecular Systems Engineering
(MSE), CH-4002 Basel, Switzerland
| | - Antonio Frontera
- Departament
de Química, Universitat de les Illes
Balears, SP-07122 Palma de Mallorca, Spain
| | - Stefan Matile
- Department
of Organic Chemistry, University of Geneva, CH-1211 Geneva, Switzerland
- National
Centre of Competence in Research (NCCR) Molecular Systems Engineering
(MSE), CH-4002 Basel, Switzerland
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8
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Solhi L, Guccini V, Heise K, Solala I, Niinivaara E, Xu W, Mihhels K, Kröger M, Meng Z, Wohlert J, Tao H, Cranston ED, Kontturi E. Understanding Nanocellulose-Water Interactions: Turning a Detriment into an Asset. Chem Rev 2023; 123:1925-2015. [PMID: 36724185 PMCID: PMC9999435 DOI: 10.1021/acs.chemrev.2c00611] [Citation(s) in RCA: 41] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Modern technology has enabled the isolation of nanocellulose from plant-based fibers, and the current trend focuses on utilizing nanocellulose in a broad range of sustainable materials applications. Water is generally seen as a detrimental component when in contact with nanocellulose-based materials, just like it is harmful for traditional cellulosic materials such as paper or cardboard. However, water is an integral component in plants, and many applications of nanocellulose already accept the presence of water or make use of it. This review gives a comprehensive account of nanocellulose-water interactions and their repercussions in all key areas of contemporary research: fundamental physical chemistry, chemical modification of nanocellulose, materials applications, and analytical methods to map the water interactions and the effect of water on a nanocellulose matrix.
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Affiliation(s)
- Laleh Solhi
- Department of Bioproducts and Biosystems, Aalto University, EspooFI-00076, Finland
| | - Valentina Guccini
- Department of Bioproducts and Biosystems, Aalto University, EspooFI-00076, Finland
| | - Katja Heise
- Department of Bioproducts and Biosystems, Aalto University, EspooFI-00076, Finland
| | - Iina Solala
- Department of Bioproducts and Biosystems, Aalto University, EspooFI-00076, Finland
| | - Elina Niinivaara
- Department of Bioproducts and Biosystems, Aalto University, EspooFI-00076, Finland.,Department of Wood Science, University of British Columbia, Vancouver, British ColumbiaV6T 1Z4, Canada
| | - Wenyang Xu
- Department of Bioproducts and Biosystems, Aalto University, EspooFI-00076, Finland.,Laboratory of Natural Materials Technology, Åbo Akademi University, TurkuFI-20500, Finland
| | - Karl Mihhels
- Department of Bioproducts and Biosystems, Aalto University, EspooFI-00076, Finland
| | - Marcel Kröger
- Department of Bioproducts and Biosystems, Aalto University, EspooFI-00076, Finland
| | - Zhuojun Meng
- Department of Bioproducts and Biosystems, Aalto University, EspooFI-00076, Finland.,Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou325001, China
| | - Jakob Wohlert
- Wallenberg Wood Science Centre (WWSC), Department of Fibre and Polymer Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10044Stockholm, Sweden
| | - Han Tao
- Department of Bioproducts and Biosystems, Aalto University, EspooFI-00076, Finland
| | - Emily D Cranston
- Department of Wood Science, University of British Columbia, Vancouver, British ColumbiaV6T 1Z4, Canada.,Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, British ColumbiaV6T 1Z3, Canada
| | - Eero Kontturi
- Department of Bioproducts and Biosystems, Aalto University, EspooFI-00076, Finland
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Effect of lysin EN4 in combination with sodium bicarbonate on reduction of Salmonella in chilled and thawed chicken meat. Int J Food Microbiol 2023; 387:110058. [PMID: 36543012 DOI: 10.1016/j.ijfoodmicro.2022.110058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 11/20/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022]
Abstract
Lysin EN4 is a peptidoglycan-degrading enzyme. Like other lysins against Gram-negative bacteria, EN4 requires cell-wall destabilizing agents, such as ethylenediamine tetraacetic acid (EDTA) to facilitate it to the peptidoglycan layer. This study aimed to use EN4 in reducing Salmonella in chilled and thawed raw chicken meat. However, the use of EDTA is limited to some types of foods. An alternative to EDTA was explored. Sodium bicarbonate was identified as an effective alternative to EDTA. The combination of EN4 with 0.1 % NaHCO3, pH 7.4 showed a wide lytic spectrum against Salmonella spp. The combination showed efficiency in reduction of Salmonella Enteritidis and Typhimurium in raw chicken meat during storage at 4 °C for 48 h, with the maximum reduction of 1.0-1.3log CFU/g. The efficiency of the combination against Salmonella was evaluated in frozen chicken meat during proper and improper defrosting. A significant reduction of Salmonella was observed in EN4-treated meat compared to the untreated control through 48 and 4 h of defrosting at 4 and 30 °C, respectively, with the greatest reduction of 1.2-1.6 log CFU/g. The results indicated that EN4 in combination with NaHCO3 has a potential use for controlling growth of Salmonella in chilled and thawed chicken meat.
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Cieh NL, Mokhtar MN, Baharuddin AS, Mohammed MAP, Wakisaka M. Progress on Lipase Immobilization Technology in Edible Oil and Fat Modifications. FOOD REVIEWS INTERNATIONAL 2023. [DOI: 10.1080/87559129.2023.2172427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- Ng Lin Cieh
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Mohd Noriznan Mokhtar
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Laboratory of Processing and Product Development, Institute of Plantation Studies, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Azhari Samsu Baharuddin
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Mohd Afandi P. Mohammed
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Minato Wakisaka
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu, Japan
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11
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Mteremko D, Chilongola J, Paluch AS, Chacha M. Targeting human thymidylate synthase: Ensemble-based virtual screening for drug repositioning and the role of water. J Mol Graph Model 2023; 118:108348. [PMID: 36257147 DOI: 10.1016/j.jmgm.2022.108348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 09/21/2022] [Accepted: 09/23/2022] [Indexed: 11/29/2022]
Abstract
A drug repositioning computational approach was carried to search inhibitors for human thymidylate synthase. An ensemble-based virtual screening of FDA-approved drugs showed the drugs Imatinib, Lumacaftor and Naldemedine to be likely candidates for repurposing. The role of water in the drug-receptor interactions was revealed by the application of an extended AutoDock scoring function that included the water forcefield. The binding affinity scores when hydrated ligands were docked were improved in the drugs considered. Further binding free energy calculations based on the Molecular Mechanics Poisson-Boltzmann Surface Area method revealed that Imatinib, Lumacaftor and Naldemedine scored -130.7 ± 28.1, -210.6 ± 29.9 and -238.0 ± 25.4 kJ/mol, respectively, showing good binding affinity for the candidates considered. Overall, the analysis of the molecular dynamics trajectory of the receptor-drug complexes revealed stable structures for Imatinib, Lumacaftor and Naldemedine, for the entire simulation time.
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Affiliation(s)
- Denis Mteremko
- The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania.
| | - Jaffu Chilongola
- Kilimanjaro Christian Medical University College, Moshi, Tanzania
| | - Andrew S Paluch
- Department of Chemical, Paper, and Biomedical Engineering, Miami University, Oxford, OH, 45056, USA
| | - Musa Chacha
- The Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania; Arusha Technical College, Arusha, Tanzania
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12
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Mills R, Vogler RJ, Bernard M, Concolino J, Hersh LB, Wei Y, Hastings JT, Dziubla T, Baldridge KC, Bhattacharyya D. Aerosol capture and coronavirus spike protein deactivation by enzyme functionalized antiviral membranes. COMMUNICATIONS MATERIALS 2022; 3:34. [PMID: 36406238 PMCID: PMC9674191 DOI: 10.1038/s43246-022-00256-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 05/02/2022] [Indexed: 06/16/2023]
Abstract
The airborne nature of coronavirus transmission makes it critical to develop new barrier technologies that can simultaneously reduce aerosol and viral spread. Here, we report nanostructured membranes with tunable thickness and porosity for filtering coronavirus-sized aerosols, combined with antiviral enzyme functionalization that can denature spike glycoproteins of the SARS-CoV-2 virus in low-hydration environments. Thin, asymmetric membranes with subtilisin enzyme and methacrylic functionalization show more than 98.90% filtration efficiency for 100-nm unfunctionalized and protein-functionalized polystyrene latex aerosol particles. Unfunctionalized membranes provided a protection factor of 540 ± 380 for coronavirus-sized particle, above the Occupational Safety and Health Administration's standard of 10 for N95 masks. SARS-CoV-2 spike glycoprotein on the surface of coronavirus-sized particles was denatured in 30 s by subtilisin enzyme-functionalized membranes with 0.02-0.2% water content on the membrane surface.
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Affiliation(s)
- Rollie Mills
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Ronald J. Vogler
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
- These authors contributed equally: Ronald J. Vogler, Matthew Bernard
| | - Matthew Bernard
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
- These authors contributed equally: Ronald J. Vogler, Matthew Bernard
| | - Jacob Concolino
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Louis B. Hersh
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY 40506, USA
| | - Yinan Wei
- Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
| | - Jeffrey Todd Hastings
- Department of Electrical and Computer Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Thomas Dziubla
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Kevin C. Baldridge
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
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Cui H, Vedder M, Zhang L, Jaeger K, Schwaneberg U, Davari MD. Polar Substitutions on the Surface of a Lipase Substantially Improve Tolerance in Organic Solvents. CHEMSUSCHEM 2022; 15:e202102551. [PMID: 35007408 PMCID: PMC9305861 DOI: 10.1002/cssc.202102551] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/10/2022] [Indexed: 06/09/2023]
Abstract
Biocatalysis in organic solvents (OSs) enables more efficient routes to the synthesis of various valuable chemicals. However, OSs often reduce enzymatic activity, which limits the use of enzymes in OSs. Herein, we report a comprehensive understanding of interactions between surface polar substitutions and DMSO by integrating molecular dynamics (MD) simulations of 45 variants from Bacillus subtilis lipase A (BSLA) and substitution landscape into a "BSLA-SSM" library. By systematically analyzing 39 structural-, solvation-, and interaction energy-based observables, we discovered that hydration shell maintenance, DMSO reduction, and decreased local flexibility simultaneously govern the stability of polar variants in OS. Moreover, the fingerprints of 1631 polar-related variants in three OSs demonstrated that substituting aromatic to polar amino acid(s) hold great potential to highly improve OSs resistance. Hence, surface polar engineering is a powerful strategy to generate OS-tolerant lipases and other enzymes, thereby adapting the catalyst to the desired reaction and process with OSs.
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Affiliation(s)
- Haiyang Cui
- Institute of BiotechnologyRWTH Aachen UniversityWorringerweg 3Aachen52074Germany
- DWI-Leibniz Institute for Interactive MaterialsForckenbeckstraße 50Aachen52074Germany
- University of Illinois at Urbana-Champaign Carl R. Woese Institute for Genomic Biology1206 West Gregory DriveUrbana, IL61801USA
| | - Markus Vedder
- Institute of BiotechnologyRWTH Aachen UniversityWorringerweg 3Aachen52074Germany
| | - Lingling Zhang
- Tianjin Institute of Industrial BiotechnologyChinese Academy of SciencesWest 7th Avenue 32, Tianjin Airport Economic AreaTianjin300308P. R. China
| | - Karl‐Erich Jaeger
- Institute of Molecular Enzyme TechnologyHeinrich Heine University DüsseldorfWilhelm Johnen StrasseJülich52426Germany
- Institute of Bio-and Geosciences IBG 1: BiotechnologyForschungszentrum Jülich GmbHWilhelm Johnen StrasseJülich52426Germany
| | - Ulrich Schwaneberg
- Institute of BiotechnologyRWTH Aachen UniversityWorringerweg 3Aachen52074Germany
- DWI-Leibniz Institute for Interactive MaterialsForckenbeckstraße 50Aachen52074Germany
| | - Mehdi D. Davari
- Department of Bioorganic ChemistryLeibniz Institute of Plant BiochemistryWeinberg 306120HalleGermany
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14
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Mohaček-Grošev V, Furić K, Vujnović V. Raman study of water deposited in solid argon matrix. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 269:120770. [PMID: 34954478 DOI: 10.1016/j.saa.2021.120770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 12/06/2021] [Accepted: 12/12/2021] [Indexed: 06/14/2023]
Abstract
New Raman data are presented concerning H2O and D2O water aggregation in argon matrix having the ratio of number of argon atoms to water molecules close to 40:1. Experiments were conducted at temperatures from 8 K to 34 K allowing observation of OH and OD stretching vibrations of water monomers, dimers, trimers and higher multimers, as well as broad bands corresponding to solid amorphous water. Molecular dynamics simulations were performed for thirteen or sometimes fourteen water molecules dispersed among 500 argon atoms. Resulting final configurations included dimers, trimers, tetramers and pentamers, all in open chain configurations which upon optimization resulted in mostly cyclic conformations. Observed OH stretching vibrations were assigned by comparing calculated normal modes in harmonic approximation at the B3LYP/aug-cc-pVDZ and PBEPBE1/aug-cc-pVDZ level of theory with our data and previously observed bands from infrared matrix isolation studies and Raman jet cooled experiments. Raman bands assigned to water multimers in argon matrix are shifted 20 to 25 cm-1 towards lower wavenumbers with respect to the positions of OH stretching vibrations of almost free water clusters.
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Affiliation(s)
- Vlasta Mohaček-Grošev
- Center of Excellence for Advanced Materials and Sensing Devices, Research Unit New Functional Materials, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia.
| | - Krešimir Furić
- Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
| | - Vedran Vujnović
- Department of Physics and Centre for Micro- and Nanosciences and Technologies, University of Rijeka, Radmile Matejčić 2, 51000 Rijeka, Croatia.
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15
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Zhang Y, Jiang C, Jing H, Fan X, Peng M, Lv W, Wang H. A comparative evaluation of physicochemical properties of pecan (Carya illinoinensis (Wangenh.) K. Koch) husk by different drying method. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2022. [DOI: 10.1007/s11694-021-01259-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Ousey K, Hodgson H, Rippon MG, Rogers AA. Hydro-responsive wound dressings for treating hard-to-heal wounds: a narrative review of the clinical evidence. J Wound Care 2021; 30:980-992. [PMID: 34881992 DOI: 10.12968/jowc.2021.30.12.980] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A break in skin integrity must be repaired as quickly as possible to avoid excess blood and fluid loss, and to minimise the onset of infection. Hard-to-heal wounds, in which the progression of the wound healing response is compromised, present several challenges to healing (for example, the presence of devitalised tissue acting as a physical barrier to healing and as a focus for bacterial contamination with the potential for subsequent infection). The objective of this article is to present, as a narrative review, the clinical evidence supporting the use of a unique hydro-responsive wound dressing (HydroClean, HRWD1, PAUL HARTMANN AG, Germany). The dressing provides a simple treatment option to address a number of clinical challenges clinicians must overcome in order to facilitate wound healing progression. These studies demonstrated that this product supported successful debridement/cleansing of a wide variety of wounds, including hard-to-heal wounds, enabled wound bed preparation, and lead to positive healing outcomes, including in wounds that previously had failed to heal. The simplicity of using HRWD1 as a single dressing can help clinicians overcome a variety of challenges when treating both acute and hard-to-heal wounds, which, with the benefit of proven patient outcomes, could make it an ideal choice for a first-line treatment.
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Affiliation(s)
- Karen Ousey
- Institute of Skin Integrity and Infection Prevention, School of Human and Health Sciences, University of Huddersfield, Huddersfield, UK
| | | | - Mark G Rippon
- University of Huddersfield, Queensgate, Huddersfield, UK
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17
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Continuous production of isoamyl acetate from fusel oil under supercritical CO2: A mass transfer approach. Chem Eng Res Des 2021. [DOI: 10.1016/j.cherd.2021.09.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Tseng FC, Huang TC. Using data mining technology to explore homocysteine at low levels. Medicine (Baltimore) 2021; 100:e26893. [PMID: 34414944 PMCID: PMC8376364 DOI: 10.1097/md.0000000000026893] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 07/19/2021] [Indexed: 01/04/2023] Open
Abstract
A high homocysteine level is known to be an independent risk factor for cardiovascular diseases; however, whether or not low homocysteine level contributes to any damage to the body has not been extensively studied. Furthermore, acquiring healthy subject databases from domestic studies on homocysteine is not trivial. Therefore, we aimed to investigate the causality between serum homocysteine levels and health status and lifestyle factors, particularly with a focus on low serum homocysteine levels. Additionally, we discussed a systematic methodical platform for data collection and statistical analysis, using the descriptive analysis of the chi-square test, t test, multivariate analysis of variance, and logistic regression.This study was a cross-sectional analysis of 5864 subjects (i.e., clients of a health examination clinic) in Taipei, Taiwan during a general health check-up in 2017. The patients' personal information and associated links were excluded. A sample group was selected as per the health criteria defined for this research whose data were processed using SPSS for descriptive statistical analysis using chi-square test, t test, multivariate analysis of variance, and logistic regression analysis.Those working for >12 hours/day had a higher homocysteine level than those working for <12 hours/day (P < .001). The average serum homocysteine level was 7.9 and 8.6 mol/L for people with poor sleep quality and good sleep quality, respectively (P = .003). The homocysteine value of people known to have cancer was analyzed using the logistic regression analysis, revealing a Δodds value of 0.898. The percentage of subjects with a homocysteine value of ≤6.3 μmol/L, who perceived their health status as "not very good" or "very bad," was higher than those with a higher homocysteine level. The number of subjects who perceived their health as poor was higher than expected.The results suggest that the homocysteine level could be an effective health management indicator. We conclude that normal homocysteine level should not be ≤6.3 μmol/L. Moreover, homocysteine should not be considered as harmful and its fluctuations from the normal range could be utilized to infer a person's physical status for health management.
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Affiliation(s)
- Fei-Ching Tseng
- The Lianan Wellness Center of the Lianan Preventative Medicine Institution, Songshan District, Taipei City
| | - Tin-Chung Huang
- Ching-Kuo Institute of Management and Health – Graduate School of Health Industry, Zhongshan District, Keelung City, Taiwan
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19
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From lignocellulose to plastics: Knowledge transfer on the degradation approaches by fungi. Biotechnol Adv 2021; 50:107770. [PMID: 33989704 DOI: 10.1016/j.biotechadv.2021.107770] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 05/04/2021] [Accepted: 05/08/2021] [Indexed: 01/21/2023]
Abstract
In this review, we argue that there is much to be learned by transferring knowledge from research on lignocellulose degradation to that on plastic. Plastic waste accumulates in the environment to hazardous levels, because it is inherently recalcitrant to biological degradation. Plants evolved lignocellulose to be resistant to degradation, but with time, fungi became capable of utilising it for their nutrition. Examples of how fungal strategies to degrade lignocellulose could be insightful for plastic degradation include how fungi overcome the hydrophobicity of lignin (e.g. production of hydrophobins) and crystallinity of cellulose (e.g. oxidative approaches). In parallel, knowledge of the methods for understanding lignocellulose degradation could be insightful such as advanced microscopy, genomic and post-genomic approaches (e.g. gene expression analysis). The known limitations of biological lignocellulose degradation, such as the necessity for physiochemical pretreatments for biofuel production, can be predictive of potential restrictions of biological plastic degradation. Taking lessons from lignocellulose degradation for plastic degradation is also important for biosafety as engineered plastic-degrading fungi could also have increased plant biomass degrading capabilities. Even though plastics are significantly different from lignocellulose because they lack hydrolysable C-C or C-O bonds and therefore have higher recalcitrance, there are apparent similarities, e.g. both types of compounds are mixtures of hydrophobic polymers with amorphous and crystalline regions, and both require hydrolases and oxidoreductases for their degradation. Thus, many lessons could be learned from fungal lignocellulose degradation.
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20
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Jaiswal K, Saraiya S, Rathod VK. Intensification of Enzymatic Synthesis of Decyl Oleate Using Ultrasound in Solvent Free System: Kinetic, Thermodynamic and Physicochemical Study. J Oleo Sci 2021; 70:559-570. [PMID: 33814515 DOI: 10.5650/jos.ess20235] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The present study evaluates the potential use of ultrasound irradiation to synthesize decyl oleate using Fermase CALBTM10000 under the solvent-free system (SFS). The optimal condition to achieve a maximum yield of 97.14% was found to be 1:2 oleic acid:decanol ratio, 1.8% (w/w) enzyme loading, 45°C temperature, 200 rpm agitation speed, 50 W power input, 50% duty cycle, 22 kHz frequency and reaction time of 25 minutes. The thermodynamic study was done to determine the change in entropy, Gibb's free energy, and change in enthalpy at various temperatures. The experimental results and kinetic study showed that the reaction followed ordered bi-bi model with kinetic parameters as rate of reaction (V max ) = 35.02 M/min/g catalyst, Michaelis constant for acid (K A ) = 34.47 M, Michaelis constant for alcohol (K B ) = 3.31 M, Inhibition constant (Ki) = 4542.4 M and sum of square error (SSE) = 0.000334. The application of ultrasound irradiation combined with biocatalyst and the absence of solvent intensified the process compared to the traditional stirring method using hexane as solvent.
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Affiliation(s)
- Kajal Jaiswal
- Department of Chemical Engineering, Institute of Chemical Technology
| | - Salonee Saraiya
- Department of Chemical Engineering, Institute of Chemical Technology
| | - Virendra K Rathod
- Department of Chemical Engineering, Institute of Chemical Technology
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21
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Storage temperature of tiger nuts (Cyperus esculentus L) affects enzyme activity, proximate composition and properties of lactic acid fermented tiger nut milk derived thereof. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110417] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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22
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Melgosa R, Sanz MT, Beltrán S. Supercritical CO2 processing of omega-3 polyunsaturated fatty acids – Towards a biorefinery for fish waste valorization. J Supercrit Fluids 2021. [DOI: 10.1016/j.supflu.2020.105121] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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23
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He X, Binks BP, Hu J, Gates I, Lu Q. Lipase-Immobilized Cellulosic Capsules with Water Absorbency for Enhanced Pickering Interfacial Biocatalysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:810-819. [PMID: 33406359 DOI: 10.1021/acs.langmuir.0c03140] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Lipase-immobilized cellulosic capsules consisting of hydrophobic ethyl cellulose (EC) and hydrophilic carboxymethyl cellulose (CMC) were developed with a promising interfacial activity and water absorbency for the enhanced Pickering interfacial biocatalysis. Lipase was physically immobilized with water-absorbent materials (CMC) via hydrogen bonding and electrostatic interactions and acted as the interior catalytic core of the capsule. The interfacially active EC worked as the exterior shell, enabling capsules to stabilize the oil-in-water Pickering emulsion for the subsequent Pickering interfacial catalysis. The capsules with CMC created interior water-rich conditions to improve the conformational and enzymatic activity of the immobilized lipase. Compared with capsules without water-absorbent materials, the capsules with CMC enhanced the efficiency of the Pickering interfacial catalysis for the esterification of oleic acid and 1-octanol by 12%. Immobilized with a small amount of lipase (0.0625 g/g), the cellulosic capsules with water absorbency could convert 50.8% of the reactants after 10 h under room temperature, significantly higher than that by the same amount of free lipase in the biphasic system (15%) and a Pickering emulsion (24.1%) stabilized by empty capsules (without lipase). Moreover, the cellulosic capsules could be recycled by simple centrifugation while retaining their high relative catalytic activity for at least eight cycles, demonstrating their sustainable catalytic performance.
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Affiliation(s)
- Xiao He
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Bernard P Binks
- Department of Chemistry, University of Hull, Hull HU6 7RX, UK
| | - Jinguang Hu
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Ian Gates
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Qingye Lu
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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24
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Cui H, Zhang L, Eltoukhy L, Jiang Q, Korkunç SK, Jaeger KE, Schwaneberg U, Davari MD. Enzyme Hydration Determines Resistance in Organic Cosolvents. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03233] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Haiyang Cui
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, Aachen 52074, Germany
| | - Lingling Zhang
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, Aachen 52074, Germany
| | - Lobna Eltoukhy
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, Aachen 52074, Germany
| | - Qianjia Jiang
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, Aachen 52074, Germany
| | - Seval Kübra Korkunç
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, Aachen 52074, Germany
| | - Karl-Erich Jaeger
- Institute of Molecular Enzyme Technology, Heinrich Heine University Düsseldorf, Wilhelm Johnen Strasse, Jülich 52426, Germany
- Institute of Bio-and Geosciences IBG 1: Biotechnology, Forschungszentrum Jülich GmbH, Wilhelm Johnen Strasse, Jülich 52426, Germany
| | - Ulrich Schwaneberg
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, Aachen 52074, Germany
- DWI-Leibniz Institute for Interactive Materials, Forckenbeckstrasse 50, Aachen 52074, Germany
| | - Mehdi D. Davari
- Institute of Biotechnology, RWTH Aachen University, Worringerweg 3, Aachen 52074, Germany
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25
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Hot Air-Assisted Radio Frequency Stabilizing Treatment Effects on Physicochemical Properties, Enzyme Activities and Nutritional Quality of Wheat Germ. FOOD BIOPROCESS TECH 2020. [DOI: 10.1007/s11947-020-02446-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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26
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Sose MT, Rathod VK. Ultrasound assisted enzyme catalysed synthesis of butyl caprylate in solvent free system. Chem Ind 2020. [DOI: 10.1080/00194506.2020.1750975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Meera T. Sose
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai, India
| | - Virendra K. Rathod
- Department of Chemical Engineering, Institute of Chemical Technology, Mumbai, India
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27
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Harith ZT, de Andrade Lima M, Charalampopoulos D, Chatzifragkou A. Optimised Production and Extraction of Astaxanthin from the Yeast Xanthophyllomyces dendrorhous. Microorganisms 2020; 8:E430. [PMID: 32204306 PMCID: PMC7143781 DOI: 10.3390/microorganisms8030430] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/14/2020] [Accepted: 03/17/2020] [Indexed: 02/06/2023] Open
Abstract
Currently, astaxanthin demand is fulfilled by chemical synthesis using petroleum-based feedstocks. As such, alternative pathways of natural astaxanthin production attracts much research interest. This study aimed at optimising bioreactor operation parameters for astaxanthin production and evaluating strategies for its subsequent extraction. The effect of pH and agitation was evident, as a significant reduction in both biomass and astaxanthin production was observed when the culture pH was not controlled and a low agitation speed was applied. At controlled pH conditions and a high agitation speed, a significant increase in biomass (16.4 g/L) and astaxanthin production (3.6 mg/L) was obtained. Enzymatic yeast cell lysis using two commercial enzymes (Accellerase 1500 and Glucanex) was optimised using the central composite design of experiment (DoE). Accellerase 1500 led to mild cell disruption and only 9% (w/w) astaxanthin extraction. However, Glucanex treatment resulted in complete astaxanthin extractability, compared to standard extraction method (DMSO/acetone). When supercritical CO2 was employed as an extraction solvent in Accellerase-pre-treated Xanthophyllomyces dendrorhous cells, astaxanthin extraction increased 2.5-fold. Overall, the study showed that extraction conditions can be tailored towards targeted pigments present in complex mixtures, such as in microbial cells.
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Affiliation(s)
- Zuharlida Tuan Harith
- Faculty of Agro Based Industry, Universiti Malaysia Kelantan Jeli Campus, Jeli 17600, Kelantan, Malaysia;
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, P.O. Box 226, Reading RG6 6AP, UK; (M.d.A.L.); (D.C.)
| | - Micael de Andrade Lima
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, P.O. Box 226, Reading RG6 6AP, UK; (M.d.A.L.); (D.C.)
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Gogerddan, Aberystwyth SY23 3EB, UK
| | - Dimitris Charalampopoulos
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, P.O. Box 226, Reading RG6 6AP, UK; (M.d.A.L.); (D.C.)
| | - Afroditi Chatzifragkou
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, P.O. Box 226, Reading RG6 6AP, UK; (M.d.A.L.); (D.C.)
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28
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De Beer D, Tobin J, Walczak B, Van Der Rijst M, Joubert E. Phenolic composition of rooibos changes during simulated fermentation: Effect of endogenous enzymes and fermentation temperature on reaction kinetics. Food Res Int 2019; 121:185-196. [DOI: 10.1016/j.foodres.2019.03.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 03/13/2019] [Accepted: 03/17/2019] [Indexed: 11/27/2022]
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29
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Chen WL, Jahromi MF, Candyrine SCL, Liang JB, Abdullah N, Idrus Z. Enzymatic hydrolysis drastically reduces fibre content of palm-kernel expeller, but without enhancing performance in broiler chickens. ANIMAL PRODUCTION SCIENCE 2019. [DOI: 10.1071/an17860] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The effectiveness of enzymatic hydrolysis of palm-kernel expeller (PKE) is dependent on various factors that influence the stability and functionality of the enzymes. In the present study, parameters influencing the enzymatic treatment of PKE were optimised employing response surface methodology. In addition, the effectiveness of enzymatic hydrolysed PKE in increasing inclusion rates in broiler diets was evaluated. Results showed that temperature, enzyme concentration and duration of hydrolysis had significant (P < 0.01) effects on the enzymatic hydrolysis of PKE. Using the crude enzyme produced by Aspergillus terreus K1 isolated in our laboratory, maximum reduction of crude fibre (40%) was achieved by fermenting the PKE at 60% initial moisture with 9.0 U/g PKE mannanase at 51°C for 18 h, with the production of 9.9% (w/w) of monosaccharides and oligosaccharides. Results of the growth-performance study indicated that inclusion rate of PKE with or without enzyme treatment in broiler diet is 5% for starter period and 20% for the finisher diet, without any detrimental effect on animal performance. Although the inclusion rate of enzyme-treated PKE can be increased to 30% without affecting average daily gain, feed conversion ratio of the birds will be compromised.
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30
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Baião Dias AL, da Cunha GN, dos Santos P, Meireles MAA, Martínez J. Fusel oil: Water adsorption and enzymatic synthesis of acetate esters in supercritical CO2. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2018.05.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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31
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Loh ZH, Lim YY. Drying effects on antioxidant activity, enzyme activity, and phytochemicals of avocado (
Persea americana
) leaves. J FOOD PROCESS PRES 2018. [DOI: 10.1111/jfpp.13667] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhi Hung Loh
- School of Science Monash University Malaysia Petaling Jaya Malaysia
| | - Yau Yan Lim
- School of Science Monash University Malaysia Petaling Jaya Malaysia
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32
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33
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Hackenberg S, Leitner T, Jekle M, Becker T. Maltose formation in wheat dough depending on mechanical starch modification and dough hydration. Carbohydr Polym 2018; 185:153-158. [DOI: 10.1016/j.carbpol.2017.12.064] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 12/22/2017] [Accepted: 12/22/2017] [Indexed: 11/16/2022]
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34
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Chiplunkar PP, Zhao X, Tomke PD, Noro J, Xu B, Wang Q, Silva C, Pratap AP, Cavaco-Paulo A. Ultrasound-assisted lipase catalyzed hydrolysis of aspirin methyl ester. ULTRASONICS SONOCHEMISTRY 2018; 40:587-593. [PMID: 28946463 DOI: 10.1016/j.ultsonch.2017.08.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 01/02/2017] [Accepted: 08/05/2017] [Indexed: 06/07/2023]
Abstract
The ultrasound-assisted hydrolysis of aspirin methyl ester (AME) was investigated using immobilized Candida antarctica lipase B (CALB) (1%) in the presence of solvents like triolein, chloroform (CHCl3) and dichloromethane (DCM). The effect of ultrasound and the role of water on the conversion rates have also been investigated. Proton nuclear magnetic resonance spectroscopic (1H NMR) was chosen to calculate hydrolysis convertion rates. We observed that lipase-ultrasound assisted hydrolysis of AME in the presence of triolein and water showed the highest hydrolysis conversion rate (65.3%). Herein low water amount played an important role as a nucleophile being crucial for the hydrolysis yields obtained. Lipase activity was affected by the conjugated action of ultrasound and solvents (35.75% of decrease), however not disturbing its hydrolytic efficiency. It was demonstrated that lipase is able to hydrolyse AME to methyl 2-hydroxy benzoate (methyl salicylate), which applications include fragrance agents in food, beverages and cosmetics, or analgesic agent in liniments.
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Affiliation(s)
- Pranali P Chiplunkar
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi 214122, China; Department of Oils, Oleochemicals and Surfactants Technology, Institute of Chemical Technology, Matunga (E), Mumbai 400019, India
| | - Xiaoman Zhao
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi 214122, China; Jiangsu Engineering Technology Research Center for Functional Textiles, Institute of Chemical Technology, Matunga (E), Mumbai 400019, India; Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Prerana D Tomke
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi 214122, China; Department of Chemical Engineering, Institute of Chemical Technology, Matunga (E), Mumbai 400019, India
| | - Jennifer Noro
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Bo Xu
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi 214122, China
| | - Qiang Wang
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi 214122, China
| | - Carla Silva
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Amit P Pratap
- Department of Oils, Oleochemicals and Surfactants Technology, Institute of Chemical Technology, Matunga (E), Mumbai 400019, India
| | - Artur Cavaco-Paulo
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi 214122, China; Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.
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35
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Kim J, Liu M, Hilty C. Modeling of Polarization Transfer Kinetics in Protein Hydration Using Hyperpolarized Water. J Phys Chem B 2017; 121:6492-6498. [PMID: 28613875 DOI: 10.1021/acs.jpcb.7b03052] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Water-protein interactions play a central role in protein structure, dynamics, and function. These interactions, traditionally, have been studied using nuclear magnetic resonance (NMR) by measuring chemical exchange and nuclear Overhauser effect (NOE). Polarization transferred from hyperpolarized water can result in substantial transient signal enhancements of protein resonances due to these processes. Here, we use dissolution dynamic nuclear polarization and flow-NMR for measuring the pH dependence of transferred signals to the protein trypsin. A maximum enhancement of 20 is visible in the amide proton region of the spectrum at pH 6.0, and of 47 at pH 7.5. The aliphatic region is enhanced up to 2.3 times at pH 6.0 and up to 2.5 times at pH 7.5. The time dependence of these observed signals can be modeled quantitatively using rate equations incorporating chemical exchange to amide sites and, optionally, intramolecular NOE to aliphatic protons. On the basis of these two- and three-site models, average exchange (kex) and cross-relaxation rates (σ) obtained were kex = 12 s-1, σ = -0.33 s-1 for pH 7.5 and kex = 1.8 s-1, σ = -0.72 s-1 for pH 6.0 at a temperature of 304 K. These values were validated using conventional EXSY and NOESY measurements. In general, a rapid measurement of exchange and cross-relaxation rates may be of interest for the study of structural changes of the protein occurring on the same time scale. Besides protein-water interactions, interactions with cosolvent or solutes can further be investigated using the same methods.
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Affiliation(s)
- Jihyun Kim
- Chemistry Department, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
| | - Mengxiao Liu
- Chemistry Department, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
| | - Christian Hilty
- Chemistry Department, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
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36
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Blaha-Nelson D, Krüger DM, Szeler K, Ben-David M, Kamerlin SCL. Active Site Hydrophobicity and the Convergent Evolution of Paraoxonase Activity in Structurally Divergent Enzymes: The Case of Serum Paraoxonase 1. J Am Chem Soc 2017; 139:1155-1167. [PMID: 28026940 PMCID: PMC5269640 DOI: 10.1021/jacs.6b10801] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
![]()
Serum
paraoxonase 1 (PON1) is a native lactonase capable of promiscuously
hydrolyzing a broad range of substrates, including organophosphates,
esters, and carbonates. Structurally, PON1 is a six-bladed β-propeller
with a flexible loop (residues 70–81) covering the active site.
This loop contains a functionally critical Tyr at position 71. We
have performed detailed experimental and computational analyses of
the role of selected Y71 variants in the active site stability and
catalytic activity in order to probe the role of Y71 in PON1’s
lactonase and organophosphatase activities. We demonstrate that the
impact of Y71 substitutions on PON1’s lactonase activity is
minimal, whereas the kcat for the paraoxonase
activity is negatively perturbed by up to 100-fold, suggesting greater
mutational robustness of the native activity. Additionally, while
these substitutions modulate PON1’s active site shape, volume,
and loop flexibility, their largest effect is in altering the solvent
accessibility of the active site by expanding the active site volume,
allowing additional water molecules to enter. This effect is markedly
more pronounced in the organophosphatase activity than the lactonase
activity. Finally, a detailed comparison of PON1 to other organophosphatases
demonstrates that either a similar “gating loop” or
a highly buried solvent-excluding active site is a common feature
of these enzymes. We therefore posit that modulating the active site
hydrophobicity is a key element in facilitating the evolution of organophosphatase
activity. This provides a concrete feature that can be utilized in
the rational design of next-generation organophosphate hydrolases
that are capable of selecting a specific reaction from a pool of viable
substrates.
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Affiliation(s)
- David Blaha-Nelson
- Science for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University , S-751 24 Uppsala, Sweden
| | - Dennis M Krüger
- Science for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University , S-751 24 Uppsala, Sweden
| | - Klaudia Szeler
- Science for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University , S-751 24 Uppsala, Sweden
| | - Moshe Ben-David
- Department of Biological Chemistry, Weizmann Institute of Science , Rehovot 76100, Israel
| | - Shina Caroline Lynn Kamerlin
- Science for Life Laboratory, Department of Cell and Molecular Biology, Uppsala University , S-751 24 Uppsala, Sweden
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37
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Atkin L, Rippon M. Autolysis: mechanisms of action in the removal of devitalised tissue. ACTA ACUST UNITED AC 2016; 25:S40-S47. [DOI: 10.12968/bjon.2016.25.20.s40] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Leanne Atkin
- Vascular Nurse Specialist/Lecturer Practitioner, Mid Yorks NHS Trust/University of Huddersfield
| | - Mark Rippon
- Visiting Clinical Research Fellow, University of Huddersfield
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38
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Tian K, Li Z. High-yielding, one-pot, and green production of biodiesel from waste grease using wet cells of a recombinant Escherichia coli strain as catalyst. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2016.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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39
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dos Santos P, Zabot GL, Meireles MAA, Mazutti MA, Martínez J. Synthesis of eugenyl acetate by enzymatic reactions in supercritical carbon dioxide. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2016.06.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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40
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Lopes S, Fausto R, Khriachtchev L. Acetic acid-water complex: The first observation of structures containing the higher-energy acetic acid conformer. J Chem Phys 2016; 144:084308. [PMID: 26931703 DOI: 10.1063/1.4942027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Non-covalent interaction of acetic acid (AA) and water is studied experimentally by IR spectroscopy in a nitrogen matrix and theoretically at the MP2 and coupled-cluster with single and double and perturbative triple excitations [CCSD(T)]/6-311++G(2d,2p) levels of theory. This work is focused on the first preparation and characterization of complexes of higher-energy (cis) conformer of AA with water. The calculations show three 1:1 structures for the trans-AA⋯H2O complexes and three 1:1 structures for the cis-AA⋯H2O complexes. Two trans-AA⋯H2O and two cis-AA⋯H2O complexes are found and structurally assigned in the experiments. The two cis-AA⋯ ⋅ H2O complexes are obtained by annealing of a matrix containing water and cis-AA molecules prepared by selective vibrational excitation of the ground-state trans form. The less stable trans-AA⋯H2O complex is obtained by vibrational excitation of the less stable cis-AA⋯H2O complex. In addition, the 1:2 complexes of trans-AA and cis-AA with water molecules are studied computationally and the most stable forms of the 1:2 complexes are experimentally identified.
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Affiliation(s)
- Susy Lopes
- CQC, Department of Chemistry, University of Coimbra, Rua Larga, P-3004-535 Coimbra, Portugal
| | - Rui Fausto
- CQC, Department of Chemistry, University of Coimbra, Rua Larga, P-3004-535 Coimbra, Portugal
| | - Leonid Khriachtchev
- Department of Chemistry, University of Helsinki, P.O. Box 55, FI-00014 Helsinki, Finland
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41
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Perera AS, Thomas J, Poopari MR, Xu Y. The Clusters-in-a-Liquid Approach for Solvation: New Insights from the Conformer Specific Gas Phase Spectroscopy and Vibrational Optical Activity Spectroscopy. Front Chem 2016; 4:9. [PMID: 26942177 PMCID: PMC4766311 DOI: 10.3389/fchem.2016.00009] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 02/08/2016] [Indexed: 11/30/2022] Open
Abstract
Vibrational optical activity spectroscopies, namely vibrational circular dichroism (VCD) and Raman optical activity (ROA), have been emerged in the past decade as powerful spectroscopic tools for stereochemical information of a wide range of chiral compounds in solution directly. More recently, their applications in unveiling solvent effects, especially those associated with water solvent, have been explored. In this review article, we first select a few examples to demonstrate the unique sensitivity of VCD spectral signatures to both bulk solvent effects and explicit hydrogen-bonding interactions in solution. Second, we discuss the induced solvent chirality, or chiral transfer, VCD spectral features observed in the water bending band region in detail. From these chirality transfer spectral data, the related conformer specific gas phase spectroscopic studies of small chiral hydration clusters, and the associated matrix isolation VCD experiments of hydrogen-bonded complexes in cold rare gas matrices, a general picture of solvation in aqueous solution emerges. In such an aqueous solution, some small chiral hydration clusters, rather than the chiral solutes themselves, are the dominant species and are the ones that contribute mainly to the experimentally observed VCD features. We then review a series of VCD studies of amino acids and their derivatives in aqueous solution under different pHs to emphasize the importance of the inclusion of the bulk solvent effects. These experimental data and the associated theoretical analyses are the foundation for the proposed "clusters-in-a-liquid" approach to account for solvent effects effectively. We present several approaches to identify and build such representative chiral hydration clusters. Recent studies which applied molecular dynamics simulations and the subsequent snapshot averaging approach to generate the ROA, VCD, electronic CD, and optical rotatory dispersion spectra are also reviewed. Challenges associated with the molecular dynamics snapshot approach are discussed and the successes of the seemingly random "ad hoc explicit solvation" reported before are also explained. To further test and improve the "clusters-in-a-liquid" model in practice, future work in terms of conformer specific gas phase spectroscopy of sequential solvation of a chiral solute, matrix isolation VCD measurements of small chiral hydration clusters, and more sophisticated models for the bulk solvent effects would be highly valuable.
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Affiliation(s)
| | | | | | - Yunjie Xu
- Department of Chemistry, University of AlbertaEdmonton, AB, Canada
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42
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43
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Increasing performance and stability of mass-manufacturable biobatteries by ink modification. SENSING AND BIO-SENSING RESEARCH 2015. [DOI: 10.1016/j.sbsr.2015.03.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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44
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Enzymatic activity and conformational and morphological studies of four commercial lipases treated with supercritical carbon dioxide. J Supercrit Fluids 2015. [DOI: 10.1016/j.supflu.2014.11.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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45
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Lozano P, Bernal JM, Nieto S, Gomez C, Garcia-Verdugo E, Luis SV. Active biopolymers in green non-conventional media: a sustainable tool for developing clean chemical processes. Chem Commun (Camb) 2015; 51:17361-74. [DOI: 10.1039/c5cc07600e] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
By understanding structure–function relationships of active biopolymers (e.g. enzymes and nucleic acids) in green non-conventional media, sustainable chemical processes may be developed.
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Affiliation(s)
- Pedro Lozano
- Departamento de Bioquímica y Biología Molecular “B” e Inmunología
- Facultad de Química
- Campus de Excelencia Internacional Mare Nostrum
- Universidad de Murcia
- Murcia
| | - Juana M. Bernal
- Departamento de Bioquímica y Biología Molecular “B” e Inmunología
- Facultad de Química
- Campus de Excelencia Internacional Mare Nostrum
- Universidad de Murcia
- Murcia
| | - Susana Nieto
- Departamento de Bioquímica y Biología Molecular “B” e Inmunología
- Facultad de Química
- Campus de Excelencia Internacional Mare Nostrum
- Universidad de Murcia
- Murcia
| | - Celia Gomez
- Departamento de Bioquímica y Biología Molecular “B” e Inmunología
- Facultad de Química
- Campus de Excelencia Internacional Mare Nostrum
- Universidad de Murcia
- Murcia
| | | | - Santiago V. Luis
- Departamento de Química Inorgánica y Orgánica
- Universidad Jaume I
- Castellón
- Spain
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46
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Jenab E, Temelli F, Curtis JM, Zhao YY. Performance of two immobilized lipases for interesterification between canola oil and fully-hydrogenated canola oil under supercritical carbon dioxide. Lebensm Wiss Technol 2014. [DOI: 10.1016/j.lwt.2014.02.051] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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47
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Microencapsulation of purified amylase enzyme from pitaya (Hylocereus polyrhizus) peel in Arabic gum-chitosan using freeze drying. Molecules 2014; 19:3731-43. [PMID: 24662085 PMCID: PMC6271093 DOI: 10.3390/molecules19033731] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 03/10/2014] [Accepted: 03/11/2014] [Indexed: 12/04/2022] Open
Abstract
Amylase is one of the most important enzymes in the world due to its wide application in various industries and biotechnological processes. In this study, amylase enzyme from Hylocereus polyrhizus was encapsulated for the first time in an Arabic gum-chitosan matrix using freeze drying. The encapsulated amylase retained complete biocatalytic activity and exhibited a shift in the optimum temperature and considerable increase in the pH and temperature stabilities compared to the free enzyme. Encapsulation of the enzyme protected the activity in the presence of ionic and non-ionic surfactants and oxidizing agents (H2O2) and enhanced the shelf life. The storage stability of amylase is found to markedly increase after immobilization and the freeze dried amylase exhibited maximum encapsulation efficiency value (96.2%) after the encapsulation process. Therefore, the present study demonstrated that the encapsulation of the enzyme in a coating agent using freeze drying is an efficient method to keep the enzyme active and stable until required in industry.
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48
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Jenab E, Temelli F. Density and volumetric expansion of carbon dioxide-expanded canola oil and its blend with fully-hydrogenated canola oil. J Supercrit Fluids 2012. [DOI: 10.1016/j.supflu.2012.03.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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49
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Bernal JM, Lozano P, García-Verdugo E, Burguete MI, Sánchez-Gómez G, López-López G, Pucheault M, Vaultier M, Luis SV. Supercritical synthesis of biodiesel. Molecules 2012; 17:8696-719. [PMID: 22825622 PMCID: PMC6268286 DOI: 10.3390/molecules17078696] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 07/12/2012] [Accepted: 07/16/2012] [Indexed: 11/17/2022] Open
Abstract
The synthesis of biodiesel fuel from lipids (vegetable oils and animal fats) has gained in importance as a possible source of renewable non-fossil energy in an attempt to reduce our dependence on petroleum-based fuels. The catalytic processes commonly used for the production of biodiesel fuel present a series of limitations and drawbacks, among them the high energy consumption required for complex purification operations and undesirable side reactions. Supercritical fluid (SCF) technologies offer an interesting alternative to conventional processes for preparing biodiesel. This review highlights the advances, advantages, drawbacks and new tendencies involved in the use of supercritical fluids (SCFs) for biodiesel synthesis.
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Affiliation(s)
- Juana M. Bernal
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Regional Campus of International Excellence “Campus Mare Nostrum”, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain;
| | - Pedro Lozano
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Regional Campus of International Excellence “Campus Mare Nostrum”, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain;
| | - Eduardo García-Verdugo
- Departamento de Química Inorgánica y Orgánica, Universidad Jaume I, Campus del Riu Sec, E-12071 Castellón, Spain; (E.G.-V.); (M.I.B.); (S.V.L.)
| | - M. Isabel Burguete
- Departamento de Química Inorgánica y Orgánica, Universidad Jaume I, Campus del Riu Sec, E-12071 Castellón, Spain; (E.G.-V.); (M.I.B.); (S.V.L.)
| | - Gregorio Sánchez-Gómez
- Departamento de Química Inorgánica, Facultad de Química, Regional Campus of International Excellence “Campus Mare Nostrum”, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain; (G.S.-G.); (G.L.-L.)
| | - Gregorio López-López
- Departamento de Química Inorgánica, Facultad de Química, Regional Campus of International Excellence “Campus Mare Nostrum”, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain; (G.S.-G.); (G.L.-L.)
| | - Mathieu Pucheault
- Groupe Phoenics, Institut des Sciences Moléculaires, Université Bordeaux 1. CNRS UMR 5255, F33405 Talence cedex, France; (M.P.); (M.V.)
| | - Michel Vaultier
- Groupe Phoenics, Institut des Sciences Moléculaires, Université Bordeaux 1. CNRS UMR 5255, F33405 Talence cedex, France; (M.P.); (M.V.)
| | - Santiago V. Luis
- Departamento de Química Inorgánica y Orgánica, Universidad Jaume I, Campus del Riu Sec, E-12071 Castellón, Spain; (E.G.-V.); (M.I.B.); (S.V.L.)
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50
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Viscosity measurement and modeling of canola oil and its blend with canola stearin in equilibrium with high pressure carbon dioxide. J Supercrit Fluids 2011. [DOI: 10.1016/j.supflu.2011.05.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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