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Luo ML, Chen H, Chen GY, Wang S, Wang Y, Yang FQ. Preparation of Alcohol Dehydrogenase-Zinc Phosphate Hybrid Nanoflowers through Biomimetic Mineralization and Its Application in the Inhibitor Screening. Molecules 2023; 28:5429. [PMID: 37513303 PMCID: PMC10386709 DOI: 10.3390/molecules28145429] [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: 06/16/2023] [Revised: 07/06/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
A biomimetic mineralization method was used in the facile and rapid preparation of nanoflowers for immobilizing alcohol dehydrogenase (ADH). The method mainly uses ADH as an organic component and zinc phosphate as an inorganic component to prepare flower-like ADH/Zn3(PO4)2 organic-inorganic hybrid nanoflowers (HNFs) with the high specific surface area through a self-assembly process. The synthesis conditions of the ADH HNFs were optimized and its morphology was characterized. Under the optimum enzymatic reaction conditions, the Michaelis-Menten constant (Km) of ADH HNFs (β-NAD+ as substrate) was measured to be 3.54 mM, and the half-maximal inhibitory concentration (IC50) of the positive control ranitidine (0.2-0.8 mM) was determined to be 0.49 mM. Subsequently, the inhibitory activity of natural medicine Penthorum chinense Pursh and nine small-molecule compounds on ADH was evaluated using ADH HNFs. The inhibition percentage of the aqueous extract of P. chinense is 57.9%. The vanillic acid, protocatechuic acid, gallic acid, and naringenin have obvious inhibitory effects on ADH, and their percentages of inhibition are 55.1%, 68.3%, 61.9%, and 75.5%, respectively. Moreover, molecular docking analysis was applied to explore the binding modes and sites of the four most active small-molecule compounds to ADH. The results of this study can broaden the application of immobilized enzymes through biomimetic mineralization, and provide a reference for the discovery of ADH inhibitors from natural products.
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Affiliation(s)
- Mao-Ling Luo
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Hua Chen
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Guo-Ying Chen
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Shengpeng Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Yitao Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Feng-Qing Yang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
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Nanozymes and nanoflower: Physiochemical properties, mechanism and biomedical applications. Colloids Surf B Biointerfaces 2023; 225:113241. [PMID: 36893662 DOI: 10.1016/j.colsurfb.2023.113241] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/08/2023] [Accepted: 03/03/2023] [Indexed: 03/07/2023]
Abstract
Natural enzymes possess several drawbacks which limits their application in industries, wastewater remediation and biomedical field. Therefore, in recent years researchers have developed enzyme mimicking nanomaterials and enzymatic hybrid nanoflower which are alternatives of enzyme. Nanozymes and organic inorganic hybrid nanoflower have been developed which mimics natural enzymes functionalities such as diverse enzyme mimicking activities, enhanced catalytic activities, low cost, ease of preparation, stability and biocompatibility. Nanozymes include metal and metal oxide nanoparticles mimicking oxidases, peroxidases, superoxide dismutase and catalases while enzymatic and non-enzymatic biomolecules were used for preparing hybrid nanoflower. In this review nanozymes and hybrid nanoflower have been compared in terms of physiochemical properties, common synthetic routes, mechanism of action, modification, green synthesis and application in the field of disease diagnosis, imaging, environmental remediation and disease treatment. We also address the current challenges facing nanozyme and hybrid nanoflower research and the possible way to fulfil their potential in future.
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Investigation into the chemical modification of α-amylase using octenyl succinic anhydride: enzyme characterisation and stability studies. Bioprocess Biosyst Eng 2023; 46:645-664. [PMID: 36826507 DOI: 10.1007/s00449-023-02850-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 02/01/2023] [Indexed: 02/25/2023]
Abstract
The present study describes the chemical modification of α-amylase using succinic anhydride (SA), phthalic anhydride (PA) and a novel modifier viz. 2-octenyl succinic anhydride (2-OSA). SA-, PA- and 2-OSA-α-amylases displayed a 50%, 91% and 46% increase in stability at pH 9, respectively; as compared to unmodified α-amylase. PA-α-amylase showed a significant increase in Ea and ΔHa#, and a concomitant decrease in ΔSa#. The modified α-amylases exhibited improved thermostability as reflected by significant reductions in Kd and ΔSd#, and increments in t1/2, D-, Ed, ΔHd# and ΔGd# values. The modified α-amylases displayed variable stabilities in the presence of different surfactants, inhibitors, metal ions and organic solvents. Interestingly, the chemical modification was found to confer resistance against inactivation by Hg2+ on α-amylase. The conformational changes in modified α-amylases were investigated using intrinsic tryptophan fluorescence, ANS (extrinsic) tryptophan fluorescence, and dynamic fluorescence quenching. Both intrinsic and extrinsic tryptophan fluorescence spectra showed increased fluorescence intensity for the modified α-amylases. Chemical modification was found to induce a certain degree of structural rigidity to α-amylase, as shown by dynamic fluorescence quenching. Analysis of the CD spectra by the K2d method using the DichroWeb online tool indicated evident changes in the α-helix, β-sheet and random coil fractions of the α-amylase secondary structure, following chemical modification using anhydrides. PA-α-amylase exhibited the highest productivity in terms of hydrolysis of starch at 60 °C over a period of 5 h indicating potential in varied biotechnological applications.
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Organic-inorganic hybrid nanoflowers: The known, the unknown, and the future. Adv Colloid Interface Sci 2022; 309:102780. [DOI: 10.1016/j.cis.2022.102780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 09/01/2022] [Accepted: 09/19/2022] [Indexed: 01/10/2023]
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Mochizuki C, Nakamura J, Nakamura M. Preparation of Fetal Bovine Serum-Copper Phosphate Hybrid Particles under Cell Culture Conditions for Cancer Cell Treatment. ACS OMEGA 2022; 7:29495-29501. [PMID: 36033705 PMCID: PMC9404488 DOI: 10.1021/acsomega.2c04096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
Fetal bovine serum (FBS) particles, which mainly consist of bovine serum albumin, have the potential for biological and medical applications as drug carriers. The coacervation of albumin is a common technique for preparing albumin-based particles. The replacement of salt with novel metal salts such as Cu is an affordable way to embed the metal ion in the albumin-based particles. Further, increased Cu distribution is prevalent in many cancers. Here, we prepared adhesive cell-like FBS-copper phosphate hybrid particles [FBS-Cu3(PO4)2], which exhibited toxicity toward cancer cells, with a narrow size distribution under cell culture conditions for preventing tumor progression. FBS-Cu3(PO4)2 showed peroxidase-like activity. In addition, FBS-Cu3(PO4)2 was successfully loaded with rhodamine B and conjugated with fluorescein isothiocyanate as models of drugs by coincubation. Thus, we designed a simple preparation method for optimizing FBS-Cu3(PO4)2 synthesis under cell culture conditions. FBS-Cu3(PO4)2 has significant potential as an efficient reactive oxygen species generator and drug-delivery agent against cancer cells. Furthermore, the RhoB-loaded FBS-Cu3(PO4)2 successfully interacted with 4T1 mouse mammary tumor cells and were confirmed to exhibit toxicity.
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Affiliation(s)
- Chihiro Mochizuki
- Department
of Organ Anatomy & Nanomedicine, Graduate School of Medicine, Yamaguchi University, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan
- Core
Clusters for Research Initiatives of Yamaguchi University, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan
| | - Junna Nakamura
- Department
of Organ Anatomy & Nanomedicine, Graduate School of Medicine, Yamaguchi University, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan
- Core
Clusters for Research Initiatives of Yamaguchi University, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan
| | - Michihiro Nakamura
- Department
of Organ Anatomy & Nanomedicine, Graduate School of Medicine, Yamaguchi University, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan
- Core
Clusters for Research Initiatives of Yamaguchi University, 1-1-1 Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan
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Chemical modification of laccase using phthalic and 2-octenyl succinic anhydrides: Enzyme characterization, stability, and its potential for clarification of cashew apple juice. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.08.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Gao Y, Shah K, Kwok I, Wang M, Rome LH, Mahendra S. Immobilized fungal enzymes: Innovations and potential applications in biodegradation and biosynthesis. Biotechnol Adv 2022; 57:107936. [PMID: 35276253 DOI: 10.1016/j.biotechadv.2022.107936] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/28/2022] [Accepted: 03/03/2022] [Indexed: 01/10/2023]
Abstract
Microbial enzymes catalyze various reactions inside and outside living cells. Among the widely studied enzymes, fungal enzymes have been used for some of the most diverse purposes, especially in bioremediation, biosynthesis, and many nature-inspired commercial applications. To improve their stability and catalytic ability, fungal enzymes are often immobilized on assorted materials, conventional as well as nanoscale. Recent advances in fungal enzyme immobilization provide effective and sustainable approaches to achieve improved environmental and commercial outcomes. This review aims to provide a comprehensive overview of commonly studied fungal enzymes and immobilization technologies. It also summarizes recent advances involving immobilized fungal enzymes for the degradation or assembly of compounds used in the manufacture of products, such as detergents, food additives, and fossil fuel alternatives. Furthermore, challenges and future directions are highlighted to offer new perspectives on improving existing technologies and addressing unexplored fields of applications.
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Affiliation(s)
- Yifan Gao
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, United States
| | - Kshitjia Shah
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, United States
| | - Ivy Kwok
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, United States
| | - Meng Wang
- Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, PA 15260, United States
| | - Leonard H Rome
- Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, United States; California NanoSystems Institute, University of California, Los Angeles, CA 90095, United States
| | - Shaily Mahendra
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, United States; California NanoSystems Institute, University of California, Los Angeles, CA 90095, United States.
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Li Q, Chai C, Zhao L. Biodegradation of Endocrine Disrupting Chemicals with Laccase Isozymes from Recombinant Pichia pastori. Catal Letters 2021. [DOI: 10.1007/s10562-021-03870-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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