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Cao Y, Song Y, Fan X, Ma L, Feng T, Zeng J, Xue C, Xu J. A smartphone-assisted portable sensing hydrogel modules based on UCNPs and Co 3O 4 NPs for fluorescence quantitation of hypoxanthine in aquatic products. Talanta 2024; 276:126259. [PMID: 38761664 DOI: 10.1016/j.talanta.2024.126259] [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: 01/20/2024] [Revised: 04/23/2024] [Accepted: 05/12/2024] [Indexed: 05/20/2024]
Abstract
Hypoxanthine is a promising index for evaluating the freshness of various aquatic products. Combined the hydrogels containing upconversion nanoparticles (UCNPs), Co3O4 NPs, and N-ethyl-N-(3-sulfopropyl)-3-methylaniline sodium salt/4-amino-antipyrine (TOPS/4-AAP) with a smartphone, a portable sensor was developed for the convenient, sensitive detection of hypoxanthine. With the H2O2 from xanthine oxidase (XOD)-catalyzed reactions of hypoxanthine, the fluorescence of UCNPs was effectively quenched by the purple product produced from the oxidization of TOPS/4-AAP catalyzed by Co3O4 NPs exhibiting peroxidase activity, among which the color change could be transformed into digital signals for quantification of hypoxanthine. The Green value in the RGB analysis of the fluorescence image was negatively proportional to hypoxanthine concentration in the range of 2.5-20 mg/L with a detection limit of 0.69 mg/L and a quantitation limit of 2.30 mg/L. Finally, this sensor was applied for hypoxanthine detection in real aquatic products, showing potential application for freshness evaluation of aquatic products.
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Affiliation(s)
- Yunrui Cao
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province, 266003, China.
| | - Yu Song
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province, 266003, China.
| | - Xiaowei Fan
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province, 266003, China.
| | - Lei Ma
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province, 266003, China.
| | - Tingyu Feng
- Qingdao Institute of Marine Bioresources for Nutrition & Health Innovation, China.
| | - Junpeng Zeng
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province, 266003, China.
| | - Changhu Xue
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province, 266003, China; Qingdao Marine Science and Technology Center, Qingdao, 266235, China.
| | - Jie Xu
- State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No. 1299, Sansha Road, Qingdao, Shandong Province, 266003, China.
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Cao Y, Song Y, Wei T, Feng T, Li M, Xue C, Xu J. MnO 2 in-situ coated upconversion nanosystem for turn-on fluorescence detection of hypoxanthine in aquatic products. Food Chem 2024; 431:137131. [PMID: 37579612 DOI: 10.1016/j.foodchem.2023.137131] [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: 06/07/2023] [Revised: 08/01/2023] [Accepted: 08/08/2023] [Indexed: 08/16/2023]
Abstract
Hypoxanthine concentration is a potential indicator to evaluate the freshness in the early post-mortem of several aquatic products. Based on MnO2 in-situ coated upconversion nanoparticles (UCNPs) and xanthine oxidase (XOD), a novel sensor was conducted for the efficient, sensitive determination of hypoxanthine. In this strategy, upconversion fluorescence quenched by MnO2 would be restored by H2O2 and uric acid (UA), two products from the XOD-catalyzed reactions of hypoxanthine. Through pretreatment with short-time heating and alkylation by N-ethylmaleimide (NEM) to avoid potential interference from reducing substances in the food matrix, this method exhibited satisfactory selectivity. The fluorescence intensity of green emission Igreen was positively proportional to hypoxanthine concentration at a wide range of 0.5-50 mg/L with a detection limit of 0.14 mg/L. Moreover, this convenient method was employed to quantify the hypoxanthine in fish, shrimp, and shellfish samples, showing excellent potential for the application in quality control of aquatic products.
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Affiliation(s)
- Yunrui Cao
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, PR China
| | - Yu Song
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, PR China
| | - Tingting Wei
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, PR China
| | - Tingyu Feng
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, PR China
| | - Meihuan Li
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, PR China
| | - Changhu Xue
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, PR China; Qingdao Marine Science and Technology Center, Qingdao 266235, PR China.
| | - Jie Xu
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, PR China.
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Chen Y, Li Y, Chao H, Wu J, Zhu W, Fang T, Gao X, Yan D. Molecular cloning and characterisation of a novel xanthine oxidase from Cellulosimicrobium cellulans ATCC21606. Process Biochem 2020. [DOI: 10.1016/j.procbio.2019.11.033] [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: 11/15/2022]
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Monika, Sharma NK, Thakur N, Sheetal, Savitri, Bhalla TC. Xanthine oxidase of Acinetobacter calcoaceticus RL2-M4: Production, purification and characterization. Protein Expr Purif 2019; 160:36-44. [PMID: 30926462 DOI: 10.1016/j.pep.2019.03.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 03/19/2019] [Accepted: 03/25/2019] [Indexed: 02/06/2023]
Abstract
Xanthine oxidase (EC 1.17.3.2) is a key enzyme of purine metabolism and has potential applications in food and pharmaceutical industries. In the present study, a new bacterial source of xanthine oxidase i.e. Acinetobacter calcoaceticus RL2-M4 with high oxidase activity was isolated from soil. The culture conditions were optimized with one variable at a time (OVAT) and response surface methodology (RSM) approaches included: a minimal salt medium (MSM) of pH 7.0 supplemented with 0.8% yeast extract, 8.5 mM xanthine and incubation at 30 °C for 24 h. Under these culture conditions 11.57 fold increase in the production of this enzyme was achieved. The enzyme was purified from A. calcoaceticus RL2-M4 using anion exchange chromatography to 8.18 fold with 31% yield and specific activity of 4.58 U/mg protein. SDS-PAGE analysis of the purified enzyme revealed that it was homodimer of 95 kDa and its native molecular mass was estimated to be 190 kDa. This enzyme was found to be stable at 35 °C for 5 h. The purified xanthine oxidase of A. calcoaceticus RL2-M4 had Km 0.3 mM and Vmax 5.8 U/mg protein using xanthine as substrate. The activity and stability characteristic of xanthine oxidase of A. calcoaceticus RL2-M4 makes it a potentially good enzyme for industrial applications.
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Affiliation(s)
- Monika
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh, 171005, India
| | - Nirmal Kant Sharma
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh, 171005, India
| | - Neerja Thakur
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh, 171005, India
| | - Sheetal
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh, 171005, India
| | - Savitri
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh, 171005, India
| | - Tek Chand Bhalla
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh, 171005, India.
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Raoufinia R, Mota A, Nozari S, Aghebati Maleki L, Balkani S, Abdolalizadeh J. A methodological approach for purification and characterization of human serum albumin. J Immunoassay Immunochem 2016; 37:623-35. [DOI: 10.1080/15321819.2016.1184163] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Sharma NK, Thakur S, Thakur N, Savitri, Bhalla TC. Thermostable Xanthine Oxidase Activity from Bacillus pumilus RL-2d Isolated from Manikaran Thermal Spring: Production and Characterization. Indian J Microbiol 2015; 56:88-98. [PMID: 26843701 DOI: 10.1007/s12088-015-0547-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Accepted: 08/12/2015] [Indexed: 11/30/2022] Open
Abstract
Xanthine oxidase is an important enzyme of purine metabolism that catalyzes the hydroxylation of hypoxanthine to xanthine and then xanthine to uric acid. A thermostable xanthine oxidase is being reported from a thermophilic organism RL-2d isolated from the Manikaran (Kullu) hot spring of Himachal Pradesh (India). Based on the morphology, physiological tests, and 16S rDNA gene sequence, RL-2d was identified as Bacillus pumilus. Optimization of physiochemical parameters resulted into 4.1-fold increase in the xanthine oxidase activity from 0.051 U/mg dcw (dry cell weight) to 0.209 U/mg dcw. The xanthine oxidase of B. pumilus RL-2d has exhibited very good thermostability and its t1/2 at 70 and 80 °C were 5 and 1 h, respectively. Activity of this enzyme was strongly inhibited by Hg(2+), Ag(+) and allopurinol. The investigation showed that B. pumilus RL-2d exhibited highest xanthine oxidase activity and remarkable thermostability among the other xanthine oxidases reported so far.
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Affiliation(s)
- Nirmal Kant Sharma
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh 171005 India
| | - Shikha Thakur
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh 171005 India
| | - Neerja Thakur
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh 171005 India
| | - Savitri
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh 171005 India
| | - Tek Chand Bhalla
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh 171005 India
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One step affinity recovery of 3α-hydroxysteroid dehydrogenase from cloned Escherichia coli. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 991:79-84. [PMID: 25913427 DOI: 10.1016/j.jchromb.2015.01.043] [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: 12/17/2014] [Revised: 01/27/2015] [Accepted: 01/30/2015] [Indexed: 11/21/2022]
Abstract
3α-Hydroxysteroid dehydrogenase (3α-HSD), from Comamonas Testosterone, catalyze reversibly the oxidoreduction of 3α-hydroxyl groups of the steroid hormones. The gene encoding 3α-HSD (hsdA) from Comamonas Testosterone was expressed in Escherchia coli BL21 (DE3). A protocol for recovering 3α-HSD based on affinity strategy was designed and employed. Deoxycholic acid was chosen as the affinity ligand, and it was linked to Sepharose 4B with the aid of the spacers as cyanuric chloride and ethanediamine. With this specific affinity medium, the enzyme recovery process consisted of only one chromatography step to capture 3α-HSD. The target protein, analyzed on HPLC Agilent SEC-5 column, was of 94% pure among the captured protein, and 98% with SDS-PAGE analysis. The yield of the expressed enzyme was 8.8% of crude extracted proteins; the recovery yield of 3α-HSD was 73.2%. 3α-HSD was revealed as a non-covalent homodimer with molecular mass of ∼56kDa by 15.0% SDS-PAGE analysis and SE-HPLC analysis. The desorption constant Kd and the theoretical maximum absorption Qmax on the affinity medium were 4.5μg/g medium and 21.3mg/g medium, respectively.
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Beyaztaş S, Arslan O. Purification of xanthine oxidase from bovine milk by affinity chromatography with a novel gel. J Enzyme Inhib Med Chem 2014; 30:442-7. [DOI: 10.3109/14756366.2014.943204] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bas SZ, Maltas E, Sennik B, Yilmaz F. Design of an electrochemical biosensing system for xanthine detection and a study on binding interaction of ketoconazole with xanthine oxidase. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2013.12.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Fu H, Wei Y, Zou Y, Li M, Wang F, Chen J, Zhang L, Liu Z, Ding L. Research Progress on the <i>Actinomyces arthrobacter</i>. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/aim.2014.412081] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Bai L, Hua Q. Asian Congress on Biotechnology. Process Biochem 2012. [DOI: 10.1016/j.procbio.2012.11.010] [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: 11/25/2022]
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