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Qin Y, Chen L, Zheng L. Amino acid modified copper-based metal organic polyhedral with higher peroxidase activity for potassium guaiacol sulfonate detection. Sci Rep 2025; 15:604. [PMID: 39753623 PMCID: PMC11698828 DOI: 10.1038/s41598-024-82782-0] [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: 07/23/2024] [Accepted: 12/09/2024] [Indexed: 01/06/2025] Open
Abstract
It has been reported some nanozymes could be used as a substitute for natural enzyme to detect H2O2 to some extent. However, the low catalytic effect of these materials limited their further application fields. Hence, to increase the catalytic activity of nanozymes was a hot research topic and many methods have been reported. Among them, surface modification was an important and efficient approach due to the surface of nanomaterials could affect their properties. In this article, three amino acid modified Cu-MOPs: H-Cu-MOP-Glutamine, H-Cu-MOP-Leucine and H-Cu-MOP-Isoleucine were obtained by further coordination interactions of carboxyl group with copper ions. Compared with H-Cu-MOP, the modified Cu-MOP exhibited a higher catalytic activity and a more stable color change, which could broaden its potential application field. Due to its excellent peroxidase activity, H-Cu-MOP-Leucine can be used to detect potassium guaiacol sulfonate with good anti-interference properties. It exhibits a favorable linear range of 5.0 × 10- 5-1.0 × 10- 3 M, and the limit of detection is 1.28 × 10- 5 M, making it suitable for practical applications. The above results indicate that post-modification of MOP can effectively improve its performance, providing a viable strategy for broadening the practical application of MOP in the detection field.
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Affiliation(s)
- Yu Qin
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Pharmacy College, Chongqing Medical and Pharmaceutical College, Chongqing, 401331, China
| | - Linlin Chen
- School of Pharmacy, QuanZhou Medical College, Quanzhou, 362000, Fujian, China
| | - Liyan Zheng
- School of Chemical Science and Technology, Key Laboratory of Medicinal Chemistry for Natural Resource, Yunnan University, No. 2 North Cuihu Road, Kunming, China.
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2
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Sasaki M, Szabó L, Uto K, Ebara M. Double-Layered Electrospun Nanofiber Filter for the Simultaneous Removal of Urea and Ammonium from Blood. ACS APPLIED MATERIALS & INTERFACES 2024; 16:67399-67410. [PMID: 39584375 DOI: 10.1021/acsami.4c16068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2024]
Abstract
A major challenge in the development of wearable artificial kidneys (WAKs) lies in the efficient removal of urea, which is found at an extremely high concentration in the blood of patients with chronic kidney disease (CKD). Urease is an enzyme that hydrolyzes urea. While it can efficiently remove urea, toxic ammonium is produced as a byproduct. In this study, nanofibers capable of removing both urea and ammonium from the blood were fabricated. Specifically, urease was immobilized on electrospun poly(ethylene-co-vinyl alcohol) (EVOH)/chitosan nanofiber membranes via covalent cross-linking. Chitosan not only helped covalent immobilization via its free amino groups but also improved hemocompatibility by suppressing protein adhesion. The resulting urease-immobilized EVOH/chitosan nanofibers exhibited an outstanding urea removal performance of 690 mg/g per hour. For ammonium removal, EVOH nanofiber membranes containing sodium cobalt(II) hexacyanoferrate(II) (NaCoHCF), an ammonium adsorbent, were prepared. The fabricated EVOH/NaCoHCF membranes exhibited an ammonium adsorption capacity of 135.5 mg/g. The two types of nanofiber membranes were combined to form a double-layered nanofiber membrane that was placed in a filter holder for continuous-flow cycling experiments. Under such conditions, all urea at a concentration similar to that in the blood of CKD patients was degraded within 1 h, and ammonium production was reduced by approximately 90% of the normal level. This double-layered nanofiber membrane can achieve both urea degradation and ammonium adsorption and is expected to advance the development of WAKs, a game changer in the treatment of CKD.
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Affiliation(s)
- Makoto Sasaki
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8571, Ibaraki, Japan
| | - László Szabó
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan
| | - Koichiro Uto
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan
| | - Mitsuhiro Ebara
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Ibaraki, Japan
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8571, Ibaraki, Japan
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3
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Xia Y, Zan H, Deng S, Zhou Y, Fan M. Fungal and enzymatic pretreatments of bamboo lignocellulose towards high-strength biocomposites: Biological macromolecule/enzyme interaction and bonding enhancement. Int J Biol Macromol 2024; 282:137363. [PMID: 39515731 DOI: 10.1016/j.ijbiomac.2024.137363] [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: 03/29/2024] [Revised: 10/04/2024] [Accepted: 11/05/2024] [Indexed: 11/16/2024]
Abstract
An energy-intensive and chemical-consuming pretreatment of bamboo is often required to develop its high-performance composites. This study is to evaluate a fungal and enzymatic pretreatment as a sustainable surface modification approach towards high-strength bamboo biocomposites based on D. sinicus. Extracellular enzyme activity analysis suggested that the lignin oxidative enzyme and pectinase secreted by the white-rot fungus T. versicolor achieved higher reaction than the hydrolytic enzymes throughout the pretreatment. Chemical structure analysis revealed that lignin and hemicellulose were partially depolymerised and/or removed during the pretreatment, leading to a relatively higher cellulose content in D. sinicus. The analysis of physical property and microstructure suggested that the surface wettability and porosity of pretreated D. sinicus were significantly improved, facilitating the spreading and penetration of adhesive resins, which subsequently contributed to the superior interfacial bonding of the biocomposites. The tensile strength of the biocomposites increased from 195.8 MPa to 245.8 MPa and the bonding strength increased from 4.9 MPa to 6.3 MPa after the pretreatment, which were 1.26 times and 1.28 times those of the untreated biocomposite respectively. The results proved that the fungal and enzymatic pretreatment is a promising, eco-friendly and efficient surface modification approach for the preparation of high-strength lignocellulosic biocomposites.
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Affiliation(s)
- Yan Xia
- Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China; Department of Civil and Environmental Engineering, Brunel University London, Uxbridge, UB8 3PH, UK
| | - Hongyu Zan
- Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China
| | - Shuduan Deng
- Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China.
| | - Yonghui Zhou
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China; Department of Civil and Environmental Engineering, Brunel University London, Uxbridge, UB8 3PH, UK.
| | - Mizi Fan
- Department of Civil and Environmental Engineering, Brunel University London, Uxbridge, UB8 3PH, UK
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4
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Berillo D, Malika T, Baimakhanova BB, Sadanov AK, Berezin VE, Trenozhnikova LP, Baimakhanova GB, Amangeldi AA, Kerimzhanova B. An Overview of Microorganisms Immobilized in a Gel Structure for the Production of Precursors, Antibiotics, and Valuable Products. Gels 2024; 10:646. [PMID: 39451299 PMCID: PMC11508006 DOI: 10.3390/gels10100646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2024] [Revised: 09/07/2024] [Accepted: 09/15/2024] [Indexed: 10/26/2024] Open
Abstract
Using free microorganisms for industrial processes has some limitations, such as the extensive consumption of substrates for growth, significant sensitivity to the microenvironment, and the necessity of separation from the product and, therefore, the cyclic process. It is widely acknowledged that confining or immobilizing cells in a matrix or support structure enhances enzyme stability, facilitates recycling, enhances rheological resilience, lowers bioprocess costs, and serves as a fundamental prerequisite for large-scale applications. This report summarizes the various cell immobilization methods, including several synthetic (polyvinylalcohol, polyethylenimine, polyacrylates, and Eudragit) and natural (gelatin, chitosan, alginate, cellulose, agar-agar, carboxymethylcellulose, and other polysaccharides) polymeric materials in the form of thin films, hydrogels, and cryogels. Advancements in the production of well-known antibiotics like penicillin and cephalosporin by various strains were discussed. Additionally, we highlighted cutting-edge research related to strain producers of peptide-based antibiotics (polymyxin B, Subtilin, Tyrothricin, varigomycin, gramicidin S, friulimicin, and bacteriocin), glusoseamines, and polyene derivatives. Crosslinking agents, especially covalent linkers, significantly affect the activity and stability of biocatalysts (penicillin G acylase, penicillinase, deacetoxycephalosporinase, L-asparaginase, β-glucosidase, Xylanase, and urease). The molecular weight of polymers is an important parameter influencing oxygen and nutrient diffusion, the kinetics of hydrogel formation, rigidity, rheology, elastic moduli, and other mechanical properties crucial for long-term utilization. A comparison of stability and enzymatic activity between immobilized enzymes and their free native counterparts was explored. The discussion was not limited to recent advancements in the biopharmaceutical field, such as microorganism or enzyme immobilization, but also extended to methods used in sensor and biosensor applications. In this study, we present data on the advantages of cell and enzyme immobilization over microorganism (bacteria and fungi) suspension states to produce various bioproducts and metabolites-such as antibiotics, enzymes, and precursors-and determine the efficiency of immobilization processes and the optimal conditions and process parameters to maximize the yield of the target products.
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Affiliation(s)
- Dmitriy Berillo
- LLP “Research and Production Center for Microbiology and Virology”, Almaty 050000, Kazakhstan; (B.B.B.)
- Department of Chemistry and Biochemical Engineering, Satbayev University, Almaty 050013, Kazakhstan;
- Department of Pharmaceutical and Toxicological Chemistry, School of Pharmacy, Asfendiyarov Kazakh National Medical University, Almaty 050000, Kazakhstan
| | - Turganova Malika
- Department of Chemistry and Biochemical Engineering, Satbayev University, Almaty 050013, Kazakhstan;
| | - Baiken B. Baimakhanova
- LLP “Research and Production Center for Microbiology and Virology”, Almaty 050000, Kazakhstan; (B.B.B.)
| | - Amankeldi K. Sadanov
- LLP “Research and Production Center for Microbiology and Virology”, Almaty 050000, Kazakhstan; (B.B.B.)
| | - Vladimir E. Berezin
- LLP “Research and Production Center for Microbiology and Virology”, Almaty 050000, Kazakhstan; (B.B.B.)
| | - Lyudmila P. Trenozhnikova
- LLP “Research and Production Center for Microbiology and Virology”, Almaty 050000, Kazakhstan; (B.B.B.)
| | - Gul B. Baimakhanova
- LLP “Research and Production Center for Microbiology and Virology”, Almaty 050000, Kazakhstan; (B.B.B.)
| | - Alma A. Amangeldi
- LLP “Research and Production Center for Microbiology and Virology”, Almaty 050000, Kazakhstan; (B.B.B.)
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Yang L, Zhao T, Zhang X, Fan T, Zhang Y, Feng Z, Liu J. Crystal structure of urethanase from Candida parapsilosis and insights into the substrate-binding through in silico mutagenesis and improves the catalytic activity and stability. Int J Biol Macromol 2024; 278:134763. [PMID: 39151849 DOI: 10.1016/j.ijbiomac.2024.134763] [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: 11/09/2023] [Revised: 08/06/2024] [Accepted: 08/13/2024] [Indexed: 08/19/2024]
Abstract
Ethyl carbamate (EC) is classified as a Class 2A carcinogen, and is present in various fermented foods, posing a threat to human health. Urethanase (EC 3.5.1.75) can catalyze EC to produce ethanol, CO2 and NH3. The urethanase (cpUH) from Candida parapsilosis can hydrolyze EC, but its low affinity and poor stability hinder its application. Here, the structure of cpUH from Candida parapsilosis was determined with a resolution of 2.66 Å. Through sequence alignment and site-directed mutagenesis, it was confirmed that cpUH contained the catalytic triad Ser-cisSer-Lys of the amidase family. Then, the structure-oriented engineering mutant N194V of urethanase was obtained. Its urethanase activity increased by 6.12 %, the catalytic efficiency (kcat/Km) increased by 21.04 %, and the enzyme stability was also enhanced. Modeling and molecular docking analysis showed that the variant N194V changed the number of hydrogen bonds between the substrate and the catalytic residue, resulting in enhanced catalytic ability. MD simulation also demonstrated that the introduction of hydrophobic amino acid Val reduced the RMSD value and increased protein stability. The findings of this study suggest that the N194V variant exhibits significant potential for industrial applications due to its enhanced affinity for substrate binding, improved catalytic efficiency, and increased enzyme stability.
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Affiliation(s)
- Lijuan Yang
- College of Bioengineering, Sichuan University of Science & Engineering, Yinbin, China; Liquor Making Bio-Technology & Application of Key Laboratory of Sichuan Province, Sichuan University of Science & Engineering, Yibin, China.
| | - Ting Zhao
- School of Pharmaceutical Sciences, Wuhan University, Wuhan, China.
| | - Xian Zhang
- College of Bioengineering, Sichuan University of Science & Engineering, Yinbin, China
| | - Tingting Fan
- College of Bioengineering, Sichuan University of Science & Engineering, Yinbin, China
| | - Yao Zhang
- College of Bioengineering, Sichuan University of Science & Engineering, Yinbin, China
| | - Zhiping Feng
- College of Bioengineering, Sichuan University of Science & Engineering, Yinbin, China; Liquor Making Bio-Technology & Application of Key Laboratory of Sichuan Province, Sichuan University of Science & Engineering, Yibin, China.
| | - Jun Liu
- College of Bioengineering, Sichuan University of Science & Engineering, Yinbin, China; Liquor Making Bio-Technology & Application of Key Laboratory of Sichuan Province, Sichuan University of Science & Engineering, Yibin, China.
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Sahin B, Ozbey-Unal B, Dizge N, Keskinler B, Balcik C. Optimization of immobilized urease enzyme on porous polymer for enhancing the stability, reusability and enzymatic kinetics using response surface methodology. Colloids Surf B Biointerfaces 2024; 240:113986. [PMID: 38795587 DOI: 10.1016/j.colsurfb.2024.113986] [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: 03/27/2024] [Revised: 05/20/2024] [Accepted: 05/22/2024] [Indexed: 05/28/2024]
Abstract
The study examines the immobilization of the urease enzyme on a range of High Internal Phase Emulsion (polyHIPE) materials, assessing characteristics, efficiency, and performance. It also investigates the impact of polyHIPE type, quantity, incubation time, and various parameters on the process and enzyme activity. Surface morphology and functional groups of polyHIPE materials were determined through scanning electron microscopy (SEM) and fourier transform infrared spectroscopy (FT-IR) analyses, revealing significant alterations after modification with polyglutaraldehyde (PGA). The maximum immobilization efficiency of 95% was achieved by adding PGA to polyHIPE materials with an incubation period of 15 h. The optimized conditions for immobilized enzyme using a Box-Behnken design (BBD) of response surface methodology (RSM) were as follows: temperature (40.8 °C), pH (7.1) and NaCl concentration (0.007 g/L). Furthermore, the immobilized enzyme demonstrated remarkable reusability, retaining 75% of its initial activity after six cycles, and sustained shelf-life stability, retaining over 40% activity after 10 days at room temperature. Kinetic analyses revealed that immobilized urease exhibited higher affinity for the substrate, but lower rate of substrate conversion compared to the free enzyme. These findings offer valuable insights into optimizing urease immobilization processes and enhancing urease stability and activity, with potential applications in various fields, including biotechnology and biocatalysis.
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Affiliation(s)
- Busra Sahin
- Department of Biotechnology, Gebze Technical University, Gebze 41400, Turkey
| | - Bahar Ozbey-Unal
- Department of Environmental Engineering, Gebze Technical University, Gebze 41400, Turkey; Institute of Earth and Marine Sciences, Gebze Technical University, Gebze 41400, Turkey
| | - Nadir Dizge
- Department of Environmental Engineering, Mersin University, Mersin 33343, Turkey
| | - Bulent Keskinler
- Department of Environmental Engineering, Gebze Technical University, Gebze 41400, Turkey
| | - Cigdem Balcik
- Department of Environmental Engineering, Gebze Technical University, Gebze 41400, Turkey.
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7
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Xiang R, Liu GY, Hou Y, Xie LX, Wang QS, Hu SQ. Double domain fusion improves the reverse transcriptase activity and inhibitor tolerance of Bst DNA polymerase. Int J Biol Macromol 2024; 274:133243. [PMID: 38901507 DOI: 10.1016/j.ijbiomac.2024.133243] [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: 12/11/2023] [Revised: 06/09/2024] [Accepted: 06/16/2024] [Indexed: 06/22/2024]
Abstract
To enhance the DNA/RNA amplification efficiency and inhibitor tolerance of Bst DNA polymerase, four chimeric Bst DNA polymerase by fusing with a DNA-binding protein Sto7d and/or a highly hydrophobic protein Hp47 to Bst DNA polymerase large fragment. One of chimeric protein HpStBL exhibited highest inhibitor tolerance, which retained high active under 0.1 U/μL sodium heparin, 0.8 ng/μL humic acid, 2.5× SYBR Green I, 8 % (v/v) whole blood, 20 % (v/v) tissue, and 2.5 % (v/v) stool. Meanwhile, HpStBL showed highest sensitivity (93.75 %) to crude whole blood infected with the African swine fever virus. Moreover, HpStBL showed excellent reverse transcriptase activity in reverse transcription loop-mediated isothermal amplification, which could successfully detect 0.5 pg/μL severe acute respiratory syndrome coronavirus 2 RNA in the presence of 1 % (v/v) stools. The fusion of two domains with different functions to Bst DNA polymerase would be an effective strategy to improve Bst DNA polymerase performance in direct loop-mediated isothermal amplification and reverse transcription loop-mediated isothermal amplification detection, and HpStBL would be a promising DNA polymerase for direct African swine fever virus/severe acute respiratory syndrome coronavirus 2 detection due to simultaneously increased inhibitor tolerance and reverse transcriptase activity.
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Affiliation(s)
- Rong Xiang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Guang-Yi Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangzhou Enzyvalley Biotech Co., Ltd., Guangzhou 510555, China
| | - Yi Hou
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Long-Xu Xie
- Guangzhou Hybribio Pharmaceutical Technology Co., Ltd., Guangzhou 510700, China
| | - Qing-Song Wang
- Guangzhou Hybribio Pharmaceutical Technology Co., Ltd., Guangzhou 510700, China
| | - Song-Qing Hu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China.
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8
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Im JK, Seo DH, Yu JS, Yoo SH. Efficient and novel biosynthesis of myricetin α-triglucoside with improved solubility using amylosucrase from Deinococcus deserti. Int J Biol Macromol 2024; 273:133205. [PMID: 38885871 DOI: 10.1016/j.ijbiomac.2024.133205] [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: 03/14/2024] [Revised: 06/02/2024] [Accepted: 06/14/2024] [Indexed: 06/20/2024]
Abstract
Although myricetin (3,3',4',5,5',7-hexahydroxyflavone, MYR) has a high antioxidant capacity and health functions, its use as a functional food material is limited owing to its low stability and water solubility. Amylosucrase (ASase) is capable of biosynthesizing flavonol α-glycoside using flavonols as acceptor molecules and sucrose as a donor molecule. Here, ASase from Deinococcus deserti (DdAS) efficiently biosynthesizes a novel MYR α-triglucoside (MYRαG3) using MYR as the acceptor molecule. Comparative homology analysis and computational simulation revealed that DdAS has a different active pocket for the transglycosylation reaction. DdAS produced MYRαG3 with a conversion efficiency of 67.4 % using 10 mM MYR and 50 mM sucrose as acceptor and donor molecules, respectively. The structure of MYRαG3 was identified as MYR 4'-O-4″,6″-tri-O-α-D-glucopyranoside using NMR and LC-MS. In silico analysis confirmed that DdAS has a distinct active pocket compared to other ASases. In addition, molecular docking simulations predicted the synthetic sequence of MYRαG3. Furthermore, MYRαG3 showed a similar DPPH radical scavenging activity of 49 %, comparable to MYR, but with significantly higher water solubility, which increased from 0.03 μg/mL to 511.5 mg/mL. In conclusion, this study demonstrated the efficient biosynthesis of a novel MYRαG3 using DdAS and highlighted the potential of MYRαG3 as a functional material.
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Affiliation(s)
- Joong-Ki Im
- Department of Food Science & Biotechnology, Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea
| | - Dong-Ho Seo
- Department of Food Science & Biotechnology, Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea
| | - Jae Sik Yu
- Department of Integrative Sciences and Industry, Sejong University, Seoul 05006, Republic of Korea
| | - Sang-Ho Yoo
- Department of Food Science & Biotechnology, Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea.
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9
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Daneshmehr M, Pazhang M, Mollaei S, Ebadi M, Pazhang Y. Targeted delivery of 5-fluorouracil and shikonin by blended and coated chitosan/pectin nanoparticles for treatment of colon cancer. Int J Biol Macromol 2024; 270:132413. [PMID: 38761911 DOI: 10.1016/j.ijbiomac.2024.132413] [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: 01/23/2024] [Revised: 05/06/2024] [Accepted: 05/14/2024] [Indexed: 05/20/2024]
Abstract
Herein, 5-fluorouracil and shikonin (extracted from Fusarium tricinctum) were loaded in chitosan/pectin nanoparticle (CS/PEC-NPs), prepared by blending (B-CS/PEC-NPs) and coating (C-CS/PEC-NPs) methods. The nanoparticles characterized by Fourier Transform Infrared (FTIR), X-ray diffraction (XRD), Energy-dispersive X-ray (EDX), Scanning Electron Microscope (SEM) and Differential Light Scattering (DLS). Then, some properties of the nanoparticles such as drug release rate and the nanoparticles cytotoxicity were studied. The FTIR, XRD, EDX, SEM and DLS results showed that the nanoparticles synthesized properly with an almost spherical morphology, an average size of 82-93 nm for B-CS/PEC-NPs, an average diameter of below 100 nm (mostly 66-89 nm) for C-CS/PEC-NPs, and hydrodynamic diameter of 310-817 nm. The drug release results indicated the lower release rate of drugs for B-CS/PEC-NPs relative to C-CS/PEC-NPs at different pHs, high release rate of drugs for the nanoparticles in the simulated large intestinal fluids containing pectinase, and Korsmeyer-Peppas model for release of the drugs. The results showed more cytotoxicity of B-CS/PEC-NPs containing drugs, especially B-CS/PEC-NPs containing both drugs (B-CS/PEC/5-FU/SHK-NPs) after treating with pectinase (IC50 of 18.6 μg/mL). In conclusion, despite the limitation of C-CS/PEC-NPs for simultaneous loading of hydrophilic and hydrophobic drugs, B-CS/PEC-NPs showed suitable potency for loading and targeted delivery of the drugs.
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Affiliation(s)
- Maryam Daneshmehr
- Department of Biology, Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Mohammad Pazhang
- Department of Biology, Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran.
| | - Saeed Mollaei
- Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Mostafa Ebadi
- Department of Biology, Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Yaghub Pazhang
- Department of Biology, Faculty of Sciences, Urmia University, Urmia, Iran
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10
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Zhang S, Wang J, Liu Y, Xu Z. Multiple strategies to improve extracellular secretion and activity of feruloyl esterase. Int J Biol Macromol 2024; 269:132082. [PMID: 38705319 DOI: 10.1016/j.ijbiomac.2024.132082] [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: 11/26/2023] [Revised: 04/14/2024] [Accepted: 05/02/2024] [Indexed: 05/07/2024]
Abstract
Feruloyl esterase has a wide range of applications, but there are still problems with low enzyme yield and activity, and complex purification steps. Our previous research found Lactobacillus amylovorus feruloyl esterase could be secreted extracellular in Escherichia coli. In this study, multiple strategies were implemented to maximize the extracellular production of feruloyl esterase with improved activity in E. coli. Firstly, codon-optimized feruloyl esterase was obtained based on the preference of E. coli, resulting in 41.97 % increase in extracellular secretion. Furthermore, by cascading T7 promoters, replacing the 5' UTR, randomly mutating the N-terminal sequence, and co-expressing secretory cofactors, the extracellular secretion was increased by 36.46 %, 31.25 %, 20.66 % and 25.75 %, respectively. Moreover, the feruloyl esterase were mutated to improve the substrate affinity and activity. The catalytic efficiency of Fae-Q134T and Fae-Q198A increased by 4.62-fold and 5.42-fold. Combining above strategies, extracellular feruloyl esterase activity was increased from 2013.70 U/L to 10,349.04 U/L. These results indicated that the activity and yield of feruloyl esterase secreted by E. coli were significantly increased, which laid a foundation for its industrial application.
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Affiliation(s)
- Susu Zhang
- College of Life Science, Shandong Normal University, Jinan 250358, PR China; Dongying Key Laboratory of Salt Tolerance Mechanism and Application of Halophytes, Dongying Institute, Shandong Normal University, Dongying 257000, PR China
| | - Jiapeng Wang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, PR China; Department of Bioengineering, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, PR China
| | - Yaohan Liu
- College of Life Science, Shandong Normal University, Jinan 250358, PR China
| | - Zhenshang Xu
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, PR China; Department of Bioengineering, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, PR China.
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11
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Xia J, Li Z, Ding Y, Shah LA, Zhao H, Ye D, Zhang J. Construction and Application of Nanozyme Sensor Arrays. Anal Chem 2024; 96:8221-8233. [PMID: 38740384 DOI: 10.1021/acs.analchem.4c00670] [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: 05/16/2024]
Abstract
Compared with traditional "lock-key mode" biosensors, a sensor array consists of a series of sensing elements based on intermolecular interactions (typically hydrogen bonds, van der Waals forces, and electrostatic interactions). At the same time, sensor arrays also have the advantages of fast response, high sensitivity, low energy consumption, low cost, rich output signals, and imageability, which have attracted widespread attention from researchers. Nanozymes are nanomaterials which own enzyme-like properties. Because of the adjustable activity, high stability, and cost effectiveness of nanozymes, they are potential candidates for construction of sensor arrays to output different signals from analytes through the chemoresponse of colorants, which solves the shortcomings of traditional sensors that they cannot support multiple detection and lack universality. Recently, a sensor array based on nanozymes as nonspecific recognition receptors has attracted much more attention from researchers and has been applied to precise recognition of proteins, bacteria, and heavy metals. In this perspective, attention is given to nanozymes and the regulation of their enzyme-like activity. Particularly, the building principles and methods for sensor arrays based on nanozymes are analyzed, and the applications are summarized. Finally, the approaches to overcome the challenges and perspectives are also presented and analyzed for facilitating further research and development of nanozyme sensor arrays. This perspective should be helpful for gaining insight into research ideas within the field of nanozyme sensor arrays.
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Affiliation(s)
- Jianing Xia
- Department of Chemistry & Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Zhen Li
- Department of Chemistry & Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Yaping Ding
- Department of Chemistry & Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Luqman Ali Shah
- Department of Chemistry & Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Hongbin Zhao
- Department of Chemistry & Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Daixin Ye
- Department of Chemistry & Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Jiujun Zhang
- Department of Chemistry & Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, PR China
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Naghshgar N, Hosseinzadeh S, Derakhshandeh A, Shaali R, Doroodmand MM. Introducing a portable electrochemical biosensor for Mycobacterium avium subsp. paratuberculosis detection using graphene oxide and chitosan. Sci Rep 2024; 14:34. [PMID: 38167964 PMCID: PMC10761741 DOI: 10.1038/s41598-023-50706-z] [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: 08/23/2023] [Accepted: 12/23/2023] [Indexed: 01/05/2024] Open
Abstract
In this contribution, a novel, low-cost, high throughput, and ultra-selective electrochemical DNA nanobiosensor was developed for accurate on-site detection of Mycobacterium avium subspecies paratuberculosis (MAP) in real media for practical diagnosis of Johne's disease (JD). The method was designed based on the immobilization of graphene oxide and chitosan biopolymer on the surface of a glassy carbon electrode, modified by electrochemical immobilization of graphene oxide and chitosan biopolymer, followed by activation of biopolymer via 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxy succinimide (EDC/NHS) coupling system. Afterward, the commercial probe DNA (ssDNA) was stabilized on the activated electrode surface to prepare an ultra-selective ssDNA-stabilized nanobiosensor for MAP sensing called "ssDNA-stabilized GO-CH-EDC/NHS-modified electrode". Several characterization methods distinguished the bioelectrode. The DNA hybridization between the nanobiosensor and target DNA was confirmed by cyclic voltammetry and differential pulse voltammetry. "At optimal experimental conditions, the nanobiosensor showed a linear range of 1.0 × 10-15-1.0 × 10-12 mol L-1, a detection limit as low as 1.53 × 10-13 mol L-1, and a repeatability with a relative standard deviation (%RSD) of 4.7%. The reproducibility was also appropriate, with a %RSD of about 10%. It was used to diagnose MAP in real samples with highly accurate results. Therefore, the developed nanobiosensor can be used for clinical diagnosis of MAP.
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Affiliation(s)
- Nahid Naghshgar
- Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Saied Hosseinzadeh
- Department of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz University, Shiraz, Iran.
| | - Abdollah Derakhshandeh
- Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Ruhollah Shaali
- Department of Chemistry, College of Science, Shiraz University, Shiraz, 71454, Iran
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Hormozi Jangi SR, Akhond M. Introducing a covalent thiol-based protected immobilized acetylcholinesterase with enhanced enzymatic performances for biosynthesis of esters. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.06.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Salehipour M, Rezaei S, Asadi Khalili HF, Motaharian A, Mogharabi-Manzari M. Nanoarchitectonics of Enzyme/Metal–Organic Framework Composites for Wastewater Treatment. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02390-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Almaghrabi O, Almulaiky YQ. A biocatalytic system obtained via immobilization of urease onto magnetic metal/alginate nanocomposite: Improving reusability and enhancing stability. BIOCATAL BIOTRANSFOR 2022. [DOI: 10.1080/10242422.2022.2082871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Omar Almaghrabi
- Department of Biology, College of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Yaaser Q. Almulaiky
- Department of Chemistry, College of Science and Arts at Khulis, University of Jeddah, Jeddah, Saudi Arabia
- Chemistry Department, Faculty of Applied Science, Taiz University, Taiz, Yemen
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