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Zhao Z, Xie Z, Chen S, Chen M, Wang X, Yi G. A novel biosensor based on tetrahedral DNA nanostructure and terminal deoxynucleotidyl transferase-assisted amplification strategy for fluorescence analysis of uracil-DNA glycosylase activity. Anal Chim Acta 2023; 1271:341432. [PMID: 37328254 DOI: 10.1016/j.aca.2023.341432] [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: 03/16/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/18/2023]
Abstract
Tetrahedral DNA nanostructure (TDN), as a classical bionanomaterial, which not only has excellent structural stability and rigidity, but also possesses high programmability due to strict base-pairs complementation, is widely used in various biosensing and bioanalysis fields. In this study, we first constructed a novel biosensor based on Uracil DNA glycosylase (UDG) -triggered collapse of TDN and terminal deoxynucleotidyl transferase (TDT)-induced insertion of copper nanoparticles (CuNPs) for fluorescence and visual analysis of UDG activity. In the presence of the target enzyme UDG, the uracil base modified on the TDN were specifically identified and removed to produce an abasic site (AP site). Endonuclease IV (Endo.IV) could cleave the AP site, making the TDN collapse and generating 3'-hydroxy (3'-OH), which were then elongated under the assistance of TDT to produce poly (T) sequences. Finally, Copper (II) sulfate (Cu2+) and l-Ascorbic acid (AA) were added to form CuNPs using poly (T) sequences as templates (T-CuNPs), resulting in a strong fluorescence signal. This method exhibited good selectivity and high sensitivity with a detection limit of 8.6 × 10-5 U/mL. Moreover, the strategy has been successfully applied to the screening of UDG inhibitors and the detection of UDG activity in complex cell lysates, which means that it has promising applications in clinical diagnosis and biomedical research.
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Affiliation(s)
- Zixin Zhao
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, 400016, China
| | - Zuowei Xie
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, 400016, China
| | - Siyi Chen
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, 400016, China
| | - Min Chen
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, 400016, China
| | - Xingyu Wang
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, 400016, China
| | - Gang Yi
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, 400016, China.
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2
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Wang L, Zhang H, Chen W, Chen H, Xiao J, Chen X. Recent advances in DNA glycosylase assays. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.10.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Yang Y, Liu X, Zhang N, Jiang W. The dumbbell probe mediated triple cascade signal amplification strategy for sensitive and specific detection of uracil DNA glycosylase activity. Talanta 2021; 234:122680. [PMID: 34364480 DOI: 10.1016/j.talanta.2021.122680] [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: 05/28/2021] [Revised: 06/28/2021] [Accepted: 06/30/2021] [Indexed: 10/21/2022]
Abstract
Uracil DNA glycosylase (UDG) is a key base excision repair (BER) enzyme and its abnormal expression is nearly relevant to several diseases including cancer. The sensitive detection of UDG activity is beneficial for biomedical studies and clinic diagnosis. In this work, we proposed a dumbbell probe mediated triple cascade signal amplification strategy for sensitive and specific detection of UDG activity. The specially designed dumbbell probe contained two uracil bases, two recognition sites for nicking enzyme and a split sequence of DNAzyme. Unsealed dumbbell probes were first connected into sealed dumbbell probes by T4 DNA ligase, and then the unsealed probes were hydrolyzed by exonuclease to ensure the purity of probes. Under the influence of UDG, two uracil bases were removed to produce two apyrimidinic (AP) sites, which were subsequently cleaved by Endo.IV. The probes after cleavage acted as primers and templates for double nicking sites strand displacement amplification (SDA) to produce a mass of two products. The products of SDA continued to act as primers and templates for rolling circle amplification (RCA) to produce repeats containing complete DNAzyme sequences. The DNAzyme repeatedly cleaved multiple molecular beacons (MB), resulting in remarkable fluorescence enhancement. Benefiting from the triple cascade signal amplification, the sensitivity was improved and the detection limit was 7.2 × 10-5 U mL-1. The method could well distinguish UDG from other interfering enzymes and detect UDG activity in real biological samples, showing good specificity. In addition, this method could be used for screening inhibitors. The above results suggested that the method provided a promising analytical means for UDG related biomedical research and clinic diagnosis.
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Affiliation(s)
- Yayun Yang
- School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, PR China
| | - Xiaoting Liu
- School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, PR China; Department of Oncology, Research Center of Basic Medicine, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, 250012, Jinan, PR China
| | - Nan Zhang
- Department of Oncology, Research Center of Basic Medicine, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, 250012, Jinan, PR China.
| | - Wei Jiang
- School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, PR China.
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Kim Y, Park Y, Lee CY, Park HG. Colorimetric Assay for Uracil DNA Glycosylase Activity Based on Toehold-Mediated Strand Displacement Circuit. Biotechnol J 2019; 15:e1900420. [PMID: 31657505 DOI: 10.1002/biot.201900420] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 10/22/2019] [Indexed: 11/08/2022]
Abstract
Herein, a novel enzyme-free and label-free strategy for colorimetric assay of uracil DNA glycosylase (UDG) activity, which relies on a target-activated toehold-mediated strand displacement (TMSD) circuit is described. The strategy employs a detection duplex probe composed of a uracil-containing strand (US) and a catalyst strand (CS). UDG present in a sample will cleave uracil bases within US and destabilize the detection duplex probe, which then leads to the dissociation of the detection duplex, releasing CS. The free CS promotes the TMSD reaction, consequently liberating a G-quadruplex DNAzyme strand (GS) which is initially caged by a blocker strand (BS). Notably, a fuel strand (FS) is supplemented to recycle the CS to promote another cycle of TMSD reaction. As a consequence, a large number of GSs are activated by UDG activity and a distinct colorimetric signal is produced through the oxidation of ABTS promoted by the peroxidase mimicking activity of the liberated GSs. Based on this design principle, UDG activity down to 0.006 U mL-1 with excellent selectivity is successfully determined. The practical applicability of this assay is also demonstrated by reliably determining UDG activities in human serum.
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Affiliation(s)
- Youna Kim
- Department of Chemical and Biomolecular Engineering (BK 21+ program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea
| | - Yeonkyung Park
- Department of Chemical and Biomolecular Engineering (BK 21+ program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea
| | - Chang Yeol Lee
- Department of Chemical and Biomolecular Engineering (BK 21+ program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea
| | - Hyun Gyu Park
- Department of Chemical and Biomolecular Engineering (BK 21+ program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea
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Yang F, Li X, Li J, Xiang Y, Yuan R. Target-triggered activation of rolling circle amplification for label-free and sensitive fluorescent uracil-DNA glycosylase activity detection and inhibition. Talanta 2019; 204:812-816. [DOI: 10.1016/j.talanta.2019.06.065] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 05/28/2019] [Accepted: 06/17/2019] [Indexed: 01/17/2023]
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6
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Wang J, Wang Y, Liu S, Wang H, Zhang X, Song X, Huang J. Base excision repair initiated rolling circle amplification-based fluorescent assay for screening uracil-DNA glycosylase activity using Endo IV-assisted cleavage of AP probes. Analyst 2019; 143:3951-3958. [PMID: 29999513 DOI: 10.1039/c8an00716k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Uracil-DNA glycosylase (UDG) is a crucial damage repair enzyme that initiates the cellular base excision repair pathway that maintains the integrity of the genome. Abnormal UDG activity may induce the malfunction of uracil excision repair that is directly related to a range of diseases including cancers, genotypic diseases, and human immunodeficiencies. In this work, a simple, robust and cost effective biosensing platform for the ultrasensitive detection of UDG activity is established based on the combination of base excision repair-initiated primer generation for rolling circular amplification (RCA) with Endo IV-assisted signal amplification. In the presence of target UDG, UDG can catalyze the removal of uracil on a hairpin probe (HP) leaving an apurinic/apyrimidinic (AP site) which can be cleaved by Endo IV to generate a primer for triggering the RCA reaction. Subsequently, numerous AP site-embedded signal probes, acting as fluorescence-quenched probes, combine with the RCA products to perform signal transduction and quadradic signal amplification through an Endo IV-catalyzed cleavage reaction, thus significantly enhancing the fluorescence signal, which can be used for UDG activity screening. Under optimum conditions, this biosensor exhibits improved sensitivity toward target UDG with a detection limit of as low as 9.3 × 10-5 U mL-1 and a wide detection range across 5 orders of magnitude. Additionally, our biosensor demonstrates high selectivity toward UDG for simple, rapid, and low-cost detection. Furthermore, by redesigning the modification of HP and using of suitable endonuclease enzymes, this RCA coupled with Endo IV-assisted signal amplification strategy might be applied for the detection of various other targets, such as thymine DNA glycosylase, 8-oxoguanine DNA glycosylase, DNA methyltransferase, and so on. Hence, the proposed strategy provides a useful and versatile biosensing platform for the ultrasensitive detection of UDG activity and related fundamental biomedicine research and clinical diagnosis.
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Affiliation(s)
- Jingfeng Wang
- College of Biological Sciences and Technology, University of Jinan, Jinan 250022, P.R. China.
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Dong L, Zhang X, Li Y, E F, Zhang J, Cheng Y. Highly Sensitive Detection of Uracil-DNA Glycosylase Activity Based on Self-Initiating Multiple Rolling Circle Amplification. ACS OMEGA 2019; 4:3881-3886. [PMID: 31459598 PMCID: PMC6648713 DOI: 10.1021/acsomega.8b03376] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 02/08/2019] [Indexed: 06/01/2023]
Abstract
Sensitive detection of uracil-DNA glycosylase (UDG) activity is very important in the study of many fundamental biochemical processes and clinical applications. Here, we develop a novel assay for the detection of UDG activity by using the self-initiating multiple rolling circle amplification (SM-RCA) strategy. We first design a trigger probe modified with NH2 at its 3'-terminal and uracil base in the middle of sequence, which is complementary to a cyclized padlock probe. In the presence of UDG, a uracil base can be excised by UDG to generate an apurinic/apyrimidinic (AP) site. The AP site is recognized and cleaved by endonuclease IV (Endo IV), releasing the primer with 3'-OH. The primer can trigger the rolling circle amplification (RCA) reaction, producing a long and repeated DNA strand embedded some uracil bases. These uracil bases can be cleaved by UDG and Endo IV again, and then, more primers are generated to initiate SM-RCA reaction, producing large amounts of DNA product. Afterward, the DNA product is measured by a specific DNA fluorescence dye for quantitative detection of UDG activity. The linear range of the method is 5 × 10-5 to 1.25 × 10-3 U/mL, and the detection limit is 1.7 × 10-5 U/mL. This method not only utilizes the target UDG itself to trigger RCA but also further induces SM-RCA reaction, providing a simple, sensitive, and cost-effective strategy for the detection of glycosylase and clinical diagnosis.
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Chen M, Li W, Ma C, Wu K, He H, Wang K. Fluorometric determination of the activity of uracil-DNA glycosylase by using graphene oxide and exonuclease I assisted signal amplification. Mikrochim Acta 2019; 186:110. [PMID: 30637581 DOI: 10.1007/s00604-019-3247-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 01/05/2019] [Indexed: 10/27/2022]
Abstract
The base-excision repair enzyme uracil-DNA glycosylase (UDG) plays a crucial role in the maintenance of genome integrity. The authors describe a fluorometric method for the detection of the activity of UDG. It is making use of (a) a 3'-FAM-labeled hairpin DNA probe with two uracil deoxyribonucleotides in the self-complementary duplex region of its hairpin structure, (b) exonuclease I (Exo I) that catalyzes the release of FAM from the UDG-induced stretched ssDNA probe, and (c) graphene oxide that quenches the green FAM fluorescence of the intact hairpin DNA probe in the absence of UDG. If Exo I causes the release of FAM from the hairpin DNA probe, the fluorescence peaking at 517 nm is turned off in the absence of UDG but turned on in its presence. The resulting assay has a wide linear range (0.008 to 1 U·mL-1) and a detection limit as low as 0.005 U·mL-1. It has good specificity for UDG over potentially interfering enzymes and gave satisfactory results when applied to biological samples. Conceivably, the method may be used in a wide range of applications such as in diagnosis, drug screening, and in studying the repair of DNA lesions. Graphical abstract Schematic presentation of a fluorometric strategy for detection of the activity of uracil-DNA glycosylase by using on graphene oxide and exonuclease I assisted signal amplification.
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Affiliation(s)
- Mingjian Chen
- School of Life Sciences, Central South University, Changsha, 410013, China
| | - Wenkai Li
- School of Life Sciences, Central South University, Changsha, 410013, China
| | - Changbei Ma
- School of Life Sciences, Central South University, Changsha, 410013, China. .,State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410081, China.
| | - Kefeng Wu
- School of Life Sciences, Central South University, Changsha, 410013, China
| | - Hailun He
- School of Life Sciences, Central South University, Changsha, 410013, China
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410081, China
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9
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Kim E, Hong IS. A Novel Approach for the Detection of BER Enzymes by Real-Time PCR. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Euntaek Kim
- Department of Chemistry; Kongju National University; Chungnam 314-701 Republic of Korea
| | - In Seok Hong
- Department of Chemistry; Kongju National University; Chungnam 314-701 Republic of Korea
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10
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Ma C, Wu K, Liu H, Xia K, Wang K, Wang J. Label-free fluorescence turn-on detection of uracil DNA glycosylase activity based on G-quadruplex formation. Talanta 2016; 160:449-453. [DOI: 10.1016/j.talanta.2016.07.048] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Revised: 07/20/2016] [Accepted: 07/23/2016] [Indexed: 10/21/2022]
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11
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Ng HZ, Ng M, Eng CM, Gao Z. Deoxyribonucleic acid glycosylase assays: Progress and prospects. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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12
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Zhao J, Ma Y, Kong R, Zhang L, Yang W, Zhao S. Tungsten disulfide nanosheet and exonuclease III co-assisted amplification strategy for highly sensitive fluorescence polarization detection of DNA glycosylase activity. Anal Chim Acta 2015; 887:216-223. [DOI: 10.1016/j.aca.2015.07.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 07/28/2015] [Accepted: 07/30/2015] [Indexed: 10/23/2022]
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13
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Fluorogenic DNA ligase and base excision repair enzyme assays using substrates labeled with single fluorophores. Anal Biochem 2015; 477:69-77. [PMID: 25728944 DOI: 10.1016/j.ab.2015.02.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 02/19/2015] [Indexed: 01/27/2023]
Abstract
Continuing our work on fluorogenic substrates labeled with single fluorophores for nucleic acid modifying enzymes, here we describe the development of such substrates for DNA ligases and some base excision repair enzymes. These substrates are hairpin-type synthetic DNA molecules with a single fluorophore located on a base close to the 3' ends, an arrangement that results in strong fluorescence quenching. When such substrates are subjected to an enzymatic reaction, the position of the dyes relative to that end of the molecules is altered, resulting in significant fluorescence intensity changes. The ligase substrates described here were 5' phosphorylated and either blunt-ended or carrying short, self-complementary single-stranded 5' extensions. The ligation reactions resulted in the covalent joining of the ends of the molecules, decreasing the quenching effect of the terminal bases on the dyes. To generate fluorogenic substrates for the base excision repair enzymes formamido-pyrimidine-DNA glycosylase (FPG), human 8-oxo-G DNA glycosylase/AP lyase (hOGG1), endonuclease IV (EndoIV), and apurinic/apyrimidinic endonuclease (APE1), we introduced abasic sites or a modified nucleotide, 8-oxo-dG, at such positions that their enzymatic excision would result in the release of a short fluorescent fragment. This was also accompanied by strong fluorescence increases. Overall fluorescence changes ranged from approximately 4-fold (ligase reactions) to more than 20-fold (base excision repair reactions).
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Ma Y, Zhao J, Li X, Zhang L, Zhao S. A label free fluorescent assay for uracil-DNA glycosylase activity based on the signal amplification of exonuclease I. RSC Adv 2015. [DOI: 10.1039/c5ra12958c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A label free fluorescent assay for uracil-DNA glycosylase activity was developed based on the signal amplification of exonuclease I.
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Affiliation(s)
- Yefei Ma
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources of Education Ministry
- Guangxi Normal University
- Guilin
- China
| | - Jingjin Zhao
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources of Education Ministry
- Guangxi Normal University
- Guilin
- China
| | - Xuejun Li
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources of Education Ministry
- Guangxi Normal University
- Guilin
- China
| | - Liangliang Zhang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources of Education Ministry
- Guangxi Normal University
- Guilin
- China
| | - Shulin Zhao
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources of Education Ministry
- Guangxi Normal University
- Guilin
- China
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Tao J, Song P, Sato Y, Nishizawa S, Teramae N, Tong A, Xiang Y. A label-free and sensitive fluorescent method for the detection of uracil-DNA glycosylase activity. Chem Commun (Camb) 2015; 51:929-32. [DOI: 10.1039/c4cc06170e] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A label-free fluorescent method has been developed for sensitive detection of uracil-DNA glycosylase activity as well as UDG inhibitors.
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Affiliation(s)
- Jing Tao
- Department of Chemistry
- Beijing Key Laboratory for Microanalytical Methods and Instrumentation
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education)
- Tsinghua University
- Beijing 100084
| | - Panshu Song
- National Institute of Metrology
- Beijing 100029
- China
| | - Yusuke Sato
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Seiichi Nishizawa
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Norio Teramae
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Aijun Tong
- Department of Chemistry
- Beijing Key Laboratory for Microanalytical Methods and Instrumentation
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education)
- Tsinghua University
- Beijing 100084
| | - Yu Xiang
- Department of Chemistry
- Beijing Key Laboratory for Microanalytical Methods and Instrumentation
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education)
- Tsinghua University
- Beijing 100084
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Liu X, Chen M, Hou T, Wang X, Liu S, Li F. Label-free colorimetric assay for base excision repair enzyme activity based on nicking enzyme assisted signal amplification. Biosens Bioelectron 2014; 54:598-602. [DOI: 10.1016/j.bios.2013.11.062] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 11/14/2013] [Accepted: 11/20/2013] [Indexed: 10/26/2022]
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17
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Real time monitoring uracil excision using uracil-containing molecular beacons. Anal Chim Acta 2014; 819:71-7. [DOI: 10.1016/j.aca.2014.02.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 01/29/2014] [Accepted: 02/05/2014] [Indexed: 11/20/2022]
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18
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Liu X, Chen M, Hou T, Wang X, Liu S, Li F. A novel electrochemical biosensor for label-free detection of uracil DNA glycosylase activity based on enzyme-catalyzed removal of uracil bases inducing strand release. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.09.131] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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