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Xiao Q, Chen M, Nie W, Xie F, Yu X, Ma C. A Fluorescent Biosensor for Streptavidin Detection Based on Double-Hairpin DNA-Templated Copper Nanoparticles. BIOSENSORS 2023; 13:168. [PMID: 36831934 PMCID: PMC9953726 DOI: 10.3390/bios13020168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/15/2023] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
In this paper, we developed a sensitive, label-free and facile fluorescent strategy for detecting streptavidin (SA) based on double-hairpin DNA-templated copper nanoparticles (CuNPs) and terminal protection of small molecule-linked DNA. Herein, a special DNA hairpin probe was designed and synthesized, which contained two poly T single-stranded loops and a nick point in the middle of the stem. Inspired by the concept of the terminal protection interaction, the specific binding of SA to the biotinylated DNA probe can prevent the exonuclease degradation and keep the integrity of DNA probe, which can be used for synthesizing fluorescent CuNPs as a template. Conversely, the DNA probe would be digested by exonucleases and therefore, would fail to form CuNPs without SA. After systematic optimization, the detection range of SA concentration is from 0.5 to 150 nM with a low detection limit of 0.09 nM. Additionally, the proposed method was also successfully applied in the biological samples. Finally, the proposed method is sensitive, effective and simple, and can be potentially applied for predicting diseases and discovering new drugs.
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Affiliation(s)
- Qiangsheng Xiao
- Department of Hepatobiliary and Pancreatic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Mingjian Chen
- School of Life Sciences, Central South University, Changsha 410017, China
| | - Wanpin Nie
- Department of Hepatobiliary and Pancreatic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Fengjiao Xie
- The Third Affiliated Hospital of Southern Medical University, Guangzhou 510640, China
| | - Xiao Yu
- Department of Hepatobiliary and Pancreatic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Changbei Ma
- School of Life Sciences, Central South University, Changsha 410017, China
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2
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Kim H, Lee S, Yoon J, Song J, Park HG. CRISPR/Cas12a collateral cleavage activity for simple and rapid detection of protein/small molecule interaction. Biosens Bioelectron 2021; 194:113587. [PMID: 34455224 DOI: 10.1016/j.bios.2021.113587] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/18/2021] [Accepted: 08/22/2021] [Indexed: 12/26/2022]
Abstract
To realize the full potential of the CRISPR/Cas system and expand its applicability up to the detection of molecular interactions, we herein describe a novel method to identify protein/small molecule interactions by utilizing the CRISPR/Cas12a collateral cleavage activity. This technique employs a single-stranded activator DNA modified with a specific small molecule, which would switch on the CRISPR/Cas12a collateral cleavage activity upon binding to crRNA within the CRISPR/Cas12a system. When the target protein binds to the small molecule on the activator DNA, the bound protein sterically hinders the access of the activator DNA to crRNA, thereby promoting less collateral cleavage activity of CRISPR/Cas12a. As a consequence, fewer reporter probes nearby are cleaved to produce accordingly reduced fluorescence signals in response to target protein. Based on this unique design principle, the two model protein/small molecule interactions, streptavidin/biotin and anti-digoxigenin/digoxigenin, were successfully determined down to 0.03 nM and 0.09 nM, respectively, with a fast and simple detection workflow (11 min). The practical applicability of this method was also verified by reliably detecting target streptavidin spiked in heterogeneous human serum. This work would provide great insight to construct novel strategies to identify protein/small molecule interaction by making the most of the CRISPR/Cas12a system beyond its superior capabilities in genome editing and molecular diagnostics.
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Affiliation(s)
- Hansol Kim
- Department of Chemical and Biomolecular Engineering (BK 21+ Program), KAIST, Daehak-ro 291, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Seoyoung Lee
- Department of Chemical and Biomolecular Engineering (BK 21+ Program), KAIST, Daehak-ro 291, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Junhyeok Yoon
- Department of Chemical and Biomolecular Engineering (BK 21+ Program), KAIST, Daehak-ro 291, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jayeon Song
- Department of Chemical and Biomolecular Engineering (BK 21+ Program), KAIST, Daehak-ro 291, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Hyun Gyu Park
- Department of Chemical and Biomolecular Engineering (BK 21+ Program), KAIST, Daehak-ro 291, Yuseong-gu, Daejeon, 34141, Republic of Korea.
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3
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Ma GM, Huo LW, Tong YX, Wang YC, Li CP, Jia HX. Label-free and sensitive MiRNA detection based on turn-on fluorescence of DNA-templated silver nanoclusters coupled with duplex-specific nuclease-assisted signal amplification. Mikrochim Acta 2021; 188:355. [PMID: 34585278 DOI: 10.1007/s00604-021-05001-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 08/24/2021] [Indexed: 11/30/2022]
Abstract
A novel strategy for microRNAs (miRNAs) detection has been developed utilizing duplex-specific nuclease-assisted signal amplification (DSNSA) and guanine-rich DNA-enhanced fluorescence of DNA-templated silver nanoclusters (AgNCs). The combination between target miRNA, DSNSA, and AgNCs is achieved by the unique design of DNA sequences. Target miRNA opens the hairpin structure of the Hairpin DNA probe (HP) by hybridizing with the HP and initiates the duplex-specific nuclease-assisted signal amplification (DSNSA) reaction. The DSNSA reaction generates the release of the guanine-rich DNA sequence, which can turn on the fluorescence of the dark AgNCs by hybridizing with the DNA template of the dark AgNCs. The fluorescence intensity of AgNCs corresponds to the dosage of the target miRNA. This is measured at 630 nm by exciting at 560 nm. The constructed method exhibits a low detection limit (~8.3 fmol), a great dynamic range of more than three orders of magnitude, and excellent selectivity. Moreover, it has a good performance for miR-21 detection in complex biological samples. A novel strategy for microRNAs (miRNAs) detection has been developed utilizing duplex-specific nuclease-assisted signal amplification (DSNSA) and guanine-rich DNA-enhanced fluorescence of DNA-templated silver nanoclusters (AgNCs).
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Affiliation(s)
- Gui-Min Ma
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; Key Laboratory of Analytical Science and Technology of Hebei Province; Institute of Life Science and Green Development; College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, Hebei Province, People's Republic of China
| | - Li-Wei Huo
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; Key Laboratory of Analytical Science and Technology of Hebei Province; Institute of Life Science and Green Development; College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, Hebei Province, People's Republic of China
| | - Yin-Xia Tong
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; Key Laboratory of Analytical Science and Technology of Hebei Province; Institute of Life Science and Green Development; College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, Hebei Province, People's Republic of China
| | - Yu-Cong Wang
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; Key Laboratory of Analytical Science and Technology of Hebei Province; Institute of Life Science and Green Development; College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, Hebei Province, People's Republic of China
| | - Cui-Ping Li
- Key Laboratory of Public Health Safety of Hebei Province; Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; College of Public Health, Hebei University, Baoding, 071002, People's Republic of China
| | - Hong-Xia Jia
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; Key Laboratory of Analytical Science and Technology of Hebei Province; Institute of Life Science and Green Development; College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, Hebei Province, People's Republic of China.
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4
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Yan Y, Hu T, Xiang X, Li W, Ma C. Fluorometric Detection of Streptavidin with a Cationic Conjugated Polymer and Hairpin DNA Probe. ChemistrySelect 2021. [DOI: 10.1002/slct.202100800] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ying Yan
- School of Life Sciences Central South University Changsha 410013 China
| | - Tingting Hu
- School of Life Sciences Central South University Changsha 410013 China
| | - Xinying Xiang
- 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
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5
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Detection of Streptavidin Based on Terminal Protection and Cationic Conjugated Polymer-Mediated Fluorescence Resonance Energy Transfer. Polymers (Basel) 2021; 13:polym13050725. [PMID: 33673477 PMCID: PMC7956837 DOI: 10.3390/polym13050725] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/21/2021] [Accepted: 02/24/2021] [Indexed: 12/17/2022] Open
Abstract
In this paper, a fast and simple strategy for sensitive detection of streptavidin (SA) was proposed based on terminal protection of small molecule-linked DNA and cationic conjugated polymer-mediated fluorescence resonance energy transfer (FRET). In principle, we designed a biotin-labelled DNA probe (P1) as the recognitive probe of SA, along with a complementary DNA probe (P2) to form double-stranded DNA (dsDNA) with P1. SYBR Green I (SG I) as a fluorescent dye was further used to specifically bind to dsDNA to emit stronger fluorescence. The cationic poly[(9,9-bis(6′-N,N,N-triethy-lammonium)hexyl) fluorenylene phenylene dibromide] (PFP) acted as the donor to participate in the FRET and transfer energy to the recipient SG I. In the absence of SA, P1 could not hybridize with P2 to form dsDNA and was digested by exonuclease I (Exo I); thus, only a weak FRET signal would be observed. In the presence of SA, biotin could specifically bind to SA, which protected P1 from Exo I cleavage. Then, P1 and P2 were hybridized into dsDNA. Therefore, the addition of SG I and PFP led to obvious FRET signal due to strong electrostatic interactions. Then, SA can be quantitatively detected by monitoring FRET changes. As the whole reagent reaction was carried out in 1.5 mL EP and detected in the colorimetric dish, the operation process of the detection system was relatively simple. The response time for each step was also relatively short. In this detection system, the linear equation was obtained for SA from 0.1 to 20 nM with a low detection limit of 0.068 nM (S/N = 3). In addition, this strategy has also achieved satisfactory results in the application of biological samples, which reveals the application prospect of this method in the future.
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Vidal L, Ben Aissa A, Salabert J, Jara JJ, Vallribera A, Pividori MI, Sebastián RM. Biotinylated Phosphorus Dendrimers as Control Line in Nucleic Acid Lateral Flow Tests. Biomacromolecules 2020; 21:1315-1323. [PMID: 32067443 DOI: 10.1021/acs.biomac.0c00161] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Lateral flow assays (LFA) are an affordable, easy-to-use, qualitative rapid test for clinical diagnosis in nonlaboratory environments and low-resource facilities. The control line of these tests is very important to provide a valid result, confirming that the platform operates correctly. A clear, nondiffused line is desirable. The number of colored nanoparticles that reach the control line in a positive test can be very small, and they should all be trapped efficiently by the molecules adsorbed there. In this work, we proposed the use of robust biotinylated dendrimers of two different generations as signal amplifiers in control lines of LFA, able to react with streptavidin-modified gold nanoparticles. Besides the synthesis and characterization, the analytical performance as control lines will be studied, and their response will be compared with other commercially available biotinylated molecules. Finally, the utility of the dendrimer implemented in a NALF (Nucleic Acid Lateral Flow) strip was also demonstrated for detection of the amplicons obtained by double-tagging PCR (polymerase chain reaction) for the detection of E. coli as a model of foodborne pathogen.
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Affiliation(s)
- Laura Vidal
- Department of Chemistry, Universitat Autònoma de Barcelona, Campus de Bellaterra s/n, 08193 Cerdanyola del Vallès, Barcelona Spain
| | | | - Jordi Salabert
- Department of Chemistry, Universitat Autònoma de Barcelona, Campus de Bellaterra s/n, 08193 Cerdanyola del Vallès, Barcelona Spain.,Centro de Innovación en Química Avanzada (ORFEO-CINQA), Campus UAB, Cerdanyola del Vallès, 08193-Barcelona, Spain
| | - José Juan Jara
- Department of Chemistry, Universitat Autònoma de Barcelona, Campus de Bellaterra s/n, 08193 Cerdanyola del Vallès, Barcelona Spain.,Centro de Innovación en Química Avanzada (ORFEO-CINQA), Campus UAB, Cerdanyola del Vallès, 08193-Barcelona, Spain
| | - Adelina Vallribera
- Department of Chemistry, Universitat Autònoma de Barcelona, Campus de Bellaterra s/n, 08193 Cerdanyola del Vallès, Barcelona Spain.,Centro de Innovación en Química Avanzada (ORFEO-CINQA), Campus UAB, Cerdanyola del Vallès, 08193-Barcelona, Spain
| | - María Isabel Pividori
- Department of Chemistry, Universitat Autònoma de Barcelona, Campus de Bellaterra s/n, 08193 Cerdanyola del Vallès, Barcelona Spain
| | - Rosa María Sebastián
- Department of Chemistry, Universitat Autònoma de Barcelona, Campus de Bellaterra s/n, 08193 Cerdanyola del Vallès, Barcelona Spain.,Centro de Innovación en Química Avanzada (ORFEO-CINQA), Campus UAB, Cerdanyola del Vallès, 08193-Barcelona, Spain
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7
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Liu Y, Gao L, Yan H, Shangguan J, Zhang Z, Xiang X. A cationic conjugated polymer coupled with exonuclease I: application to the fluorometric determination of protein and cell imaging. Mikrochim Acta 2018; 185:118. [PMID: 29594586 DOI: 10.1007/s00604-017-2661-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 12/31/2017] [Indexed: 11/25/2022]
Abstract
A strategy is described for the detection of protein by using a cationic fluorescent conjugated polymer coupled with exonuclease I (Exo I). Taking streptavidin (SA) as model protein, it is observed that Exo I can digest single-stranded DNA conjugated with biotin and carboxyfluorescein (P1) if SA is absent. This leads to the formation of small nucleotide fragments and to weak fluorescence resonance energy transfer (FRET) from the polymer to P1. If, however, SA is present, the high affinity of SA and biotin prevents the digestion of P1 by Exo I. This results in the sorption of P1 on the surface of the polymer through strong electrostatic interaction. Hence, efficient FRET occurs from the fluorescent polymer to the fluorescent label of P1. Fluorescence is measured at an excitation wavelength of 370 nm, and emission is measured at two wavelengths (530 and 425 nm). The ratio of the two intensities (I530/I425) is directly related to the concentration of SA. Under the optimal conditions, the assay has a detection limit of 1.3 ng·mL-1. The method was also applied to image the folate receptor in HeLa cells, thus demonstrating the versatility of this strategy. Graphical abstract A fluorometric strategy is described for protein detection and cell imaging based on a cationic conjugated polymer (PFP) coupled with exonuclease I (Exo I) trigged fluorescence resonance energy transfer (FRET).
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Affiliation(s)
- Yufei Liu
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China.
| | - Liyun Gao
- Department of toxicology, School of Public Health, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Huijuan Yan
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Jingfang Shangguan
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Zhen Zhang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, Hubei, 430000, People's Republic of China
| | - Xia Xiang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, Hubei, 430000, People's Republic of China.
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8
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Chen Z, Liu C, Cao F, Ren J, Qu X. DNA metallization: principles, methods, structures, and applications. Chem Soc Rev 2018; 47:4017-4072. [DOI: 10.1039/c8cs00011e] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This review summarizes the research activities on DNA metallization since the concept was first proposed in 1998, covering the principles, methods, structures, and applications.
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Affiliation(s)
- Zhaowei Chen
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resources Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- P. R. China
| | - Chaoqun Liu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resources Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- P. R. China
| | - Fangfang Cao
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resources Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- P. R. China
| | - Jinsong Ren
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resources Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- P. R. China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resources Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- P. R. China
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Zhao J, Li C, Ma G, Hao W, Jia H. Colorimetric detection of protein via the terminal protection of small-molecule-linked DNA and unmodified gold nanoparticles. RSC Adv 2018; 8:38758-38764. [PMID: 35558333 PMCID: PMC9090659 DOI: 10.1039/c8ra07314g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Accepted: 10/31/2018] [Indexed: 11/21/2022] Open
Abstract
A novel colorimetric strategy for protein detection was developed based on unmodified gold nanoparticles (AuNPs) and terminal protection from a target protein.
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Affiliation(s)
- Jianwei Zhao
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education
- Key Laboratory of Analytical Science and Technology of Hebei Province
- College of Chemistry and Environment Science
- Hebei University
- Baoding
| | - Cuiping Li
- College of Public Health
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education
- Hebei University
- Baoding
- P. R. China
| | - Guimin Ma
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education
- Key Laboratory of Analytical Science and Technology of Hebei Province
- College of Chemistry and Environment Science
- Hebei University
- Baoding
| | - Wenhui Hao
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education
- Key Laboratory of Analytical Science and Technology of Hebei Province
- College of Chemistry and Environment Science
- Hebei University
- Baoding
| | - Hongxia Jia
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education
- Key Laboratory of Analytical Science and Technology of Hebei Province
- College of Chemistry and Environment Science
- Hebei University
- Baoding
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10
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Jia XY, Xue YR, Li HW, Fu DY, Wang WX, Wu Y. The capsid assembly-induced luminescence enhancement (AILE) of DNA-protected silver nanoclusters and anin situapplication. NEW J CHEM 2018. [DOI: 10.1039/c8nj03179g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The study presents an AILE phenomenon for silver nanoclusters and supplies a fluorescence method to evaluate the processes of VLP assembly/disassembly.
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Affiliation(s)
- Xiang-Yu Jia
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- China
| | - Ya-Rong Xue
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- China
| | - Hong-Wei Li
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- China
| | - Ding-Yi Fu
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- China
| | - Wei-Xian Wang
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- China
| | - Yuqing Wu
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- China
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Kim H, Lee CY, Song J, Yoon J, Park KS, Park HG. Protein-induced fluorescence enhancement for a simple and universal detection of protein/small molecule interactions. RSC Adv 2018; 8:39913-39917. [PMID: 35558217 PMCID: PMC9091315 DOI: 10.1039/c8ra08515c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 11/19/2018] [Indexed: 12/04/2022] Open
Abstract
We herein describe a novel and efficient method for the detection of protein/small molecule (SM) interactions, which relies on the protein-induced fluorescence enhancement (PIFE). In this method, a duplex probe is designed to position Cy3 and SM at the optimal distance to maximize the effect of PIFE, which is utilized as the key component. In the presence of target proteins that bind to SM, the Cy3 is guided close to the target proteins, which significantly enhances the fluorescence signal through a process of PIFE. With this approach, we successfully analyzed a model target protein, streptavidin (STV) that interacts with biotin (BTN) in less than 10 min without any washing steps. In addition, the practical applicability of this method was demonstrated by reliably determining STV in human serum. Finally, the universal applicability of this method was demonstrated by monitoring the interaction between folate and folate receptors. We herein describe a novel and efficient method for the detection of protein/small molecule (SM) interactions, which relies on the protein-induced fluorescence enhancement (PIFE).![]()
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Affiliation(s)
- Hansol Kim
- Department of Chemical and Biomolecular Engineering (BK 21+ Program)
- KAIST
- Daejeon 305-701
- Republic of Korea
| | - Chang Yeol Lee
- Department of Chemical and Biomolecular Engineering (BK 21+ Program)
- KAIST
- Daejeon 305-701
- Republic of Korea
| | - Jayeon Song
- Department of Chemical and Biomolecular Engineering (BK 21+ Program)
- KAIST
- Daejeon 305-701
- Republic of Korea
| | - Junhyeok Yoon
- Department of Chemical and Biomolecular Engineering (BK 21+ Program)
- KAIST
- Daejeon 305-701
- Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering
- College of Engineering
- Konkuk University
- Seoul 05029
- Republic of Korea
| | - Hyun Gyu Park
- Department of Chemical and Biomolecular Engineering (BK 21+ Program)
- KAIST
- Daejeon 305-701
- Republic of Korea
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