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Matoba Y, Sato Y, Oda K, Hatori Y, Morimoto K. Lectins engineered to favor a glycan-binding conformation have enhanced antiviral activity. J Biol Chem 2021; 296:100698. [PMID: 33895142 PMCID: PMC8166773 DOI: 10.1016/j.jbc.2021.100698] [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: 11/09/2020] [Revised: 04/14/2021] [Accepted: 04/21/2021] [Indexed: 01/08/2023] Open
Abstract
Homologues of the Oscillatoria agardhii agglutinin (OAA) lectins contain a sequence repeat of ∼66 amino acids, with the number of tandem repeats varying across family members. OAA homologues bind high-mannose glycans on viral surface proteins, thereby interfering with viral entry into host cells. As such, OAA homologues have potential utility as antiviral agents, but a more detailed understanding of their structure–function relationships would enable us to develop improved constructs. Here, we determined the X-ray crystal structure of free and glycan-bound forms of Pseudomonas taiwanensis lectin (PTL), an OAA-family lectin consisting of two tandem repeats. Like other OAA-family lectins, PTL exhibited a β-barrel-like structure with two symmetrically positioned glycan-binding sites at the opposite ends of the barrel. Upon glycan binding, the conformation of PTL undergoes a more significant change than expected from previous OAA structural analysis. Moreover, the electron density of the bound glycans suggested that the binding affinities are different at the two binding sites. Next, based on analysis of these structures, we used site-specific mutagenesis to create PTL constructs expected to increase the population with a conformation suitable for glycan binding. The engineered PTLs were examined for their antiviral activity against the influenza virus. Interestingly, some exhibited stronger activity compared with that of the parent PTL. We propose that our approach is effective for the generation of potential microbicides with enhanced antiviral activity.
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Affiliation(s)
- Yasuyuki Matoba
- Faculty of Pharmacy, Yasuda Women's University, Hiroshima, Japan
| | - Yuichiro Sato
- Faculty of Pharmacy, Yasuda Women's University, Hiroshima, Japan
| | - Kosuke Oda
- Department of Virology, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yuta Hatori
- Faculty of Pharmacy, Yasuda Women's University, Hiroshima, Japan
| | - Kinjiro Morimoto
- Faculty of Pharmacy, Yasuda Women's University, Hiroshima, Japan.
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2
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Chen L, Fu Y, Wang N, Yang A, Li Y, Wu J, Ju H, Yan F. Organic Electrochemical Transistors for the Detection of Cell Surface Glycans. ACS APPLIED MATERIALS & INTERFACES 2018; 10:18470-18477. [PMID: 29749223 DOI: 10.1021/acsami.8b01987] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Cell surface glycans play critical roles in diverse biological processes, such as cell-cell communication, immunity, infection, development, and differentiation. Their expressions are closely related to cancer growth and metastasis. This work demonstrates an organic electrochemical transistor (OECT)-based biosensor for the detection of glycan expression on living cancer cells. Herein, mannose on human breast cancer cells (MCF-7) as the target glycan model, poly dimethyl diallyl ammonium chloride-multiwall carbon nanotubes (PDDA-MWCNTs) as the loading interface, concanavalin A (Con A) with active mannose binding sites, aptamer and horseradish peroxidase co-immobilized gold nanoparticles (HRP-aptamer-Au NPs) as specific nanoprobes are used to fabricate the OECT biosensor. In this strategy, PDDA-MWCNT interfaces can enhance the loading of Con A, and the target cells can be captured through Con A via active mannose binding sites. Thus, the expression of cell surface can be reflected by the amount of cells captured on the gate. Specific nanoprobes are introduced to the captured cells to produce an OECT signal because of the reduction of hydrogen peroxide catalyzed by HRP conjugated on Au nanoparticles, while the aptamer on nanoprobes can selectively recognize the MCF-7 cells. It is reasonable that more target cells are captured on the gate electrode, more HRP-nanoprobes are loaded thus a larger signal response. The device shows an obvious response to MCF-7 cells down to 10 cells/μL and can be used to selectively monitor the change of mannose expression on cell surfaces upon a treatment with the N-glycan inhibitor. The OECT-based biosensor is promising for the analysis of glycan expressions on the surfaces of different types of cells.
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Affiliation(s)
- Lizhen Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
- Department of Applied Physics , The Hong Kong Polytechnic University , Kowloon , Hong Kong
| | - Ying Fu
- Department of Applied Physics , The Hong Kong Polytechnic University , Kowloon , Hong Kong
| | - Naixiang Wang
- Department of Applied Physics , The Hong Kong Polytechnic University , Kowloon , Hong Kong
| | - Anneng Yang
- Department of Applied Physics , The Hong Kong Polytechnic University , Kowloon , Hong Kong
| | - Yuanzhe Li
- Department of Applied Physics , The Hong Kong Polytechnic University , Kowloon , Hong Kong
| | - Jie Wu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Feng Yan
- Department of Applied Physics , The Hong Kong Polytechnic University , Kowloon , Hong Kong
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3
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S. Coulibaly F, N. Thomas D, C. Youan BB. Anti-HIV lectins and current delivery strategies. AIMS MOLECULAR SCIENCE 2018. [DOI: 10.3934/molsci.2018.1.96] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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4
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Mitchell CA, Ramessar K, O'Keefe BR. Antiviral lectins: Selective inhibitors of viral entry. Antiviral Res 2017; 142:37-54. [PMID: 28322922 PMCID: PMC5414728 DOI: 10.1016/j.antiviral.2017.03.007] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 03/13/2017] [Indexed: 01/27/2023]
Abstract
Many natural lectins have been reported to have antiviral activity. As some of these have been put forward as potential development candidates for preventing or treating viral infections, we have set out in this review to survey the literature on antiviral lectins. The review groups lectins by structural class and class of source organism we also detail their carbohydrate specificity and their reported antiviral activities. The review concludes with a brief discussion of several of the pertinent hurdles that heterologous proteins must clear to be useful clinical candidates and cites examples where such studies have been reported for antiviral lectins. Though the clearest path currently being followed is the use of antiviral lectins as anti-HIV microbicides via topical mucosal administration, some investigators have also found systemic efficacy against acute infections following subcutaneous administration.
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Affiliation(s)
- Carter A Mitchell
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, NIH, Frederick, MD, 21702-1201, USA
| | - Koreen Ramessar
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, NIH, Frederick, MD, 21702-1201, USA
| | - Barry R O'Keefe
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, NIH, Frederick, MD, 21702-1201, USA.
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5
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Ban D, Smith CA, de Groot BL, Griesinger C, Lee D. Recent advances in measuring the kinetics of biomolecules by NMR relaxation dispersion spectroscopy. Arch Biochem Biophys 2017; 628:81-91. [PMID: 28576576 DOI: 10.1016/j.abb.2017.05.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 05/26/2017] [Accepted: 05/29/2017] [Indexed: 12/25/2022]
Abstract
Protein function can be modulated or dictated by the amplitude and timescale of biomolecular motion, therefore it is imperative to study protein dynamics. Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful technique capable of studying timescales of motion that range from those faster than molecular reorientation on the picosecond timescale to those that occur in real-time. Across this entire regime, NMR observables can report on the amplitude of atomic motion, and the kinetics of atomic motion can be ascertained with a wide variety of experimental techniques from real-time to milliseconds and several nanoseconds to picoseconds. Still a four orders of magnitude window between several nanoseconds and tens of microseconds has remained elusive. Here, we highlight new relaxation dispersion NMR techniques that serve to cover this "hidden-time" window up to hundreds of nanoseconds that achieve atomic resolution while studying the molecule under physiological conditions.
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Affiliation(s)
- David Ban
- Department of Medicine, James Graham Brown Cancer Center, University of Louisville, 505 S. Hancock St., Louisville, KY 40202, USA
| | - Colin A Smith
- Department for Theoretical and Computational Biophysics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, Göttingen, 37077 Germany; Department of Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, Göttingen, 37077 Germany
| | - Bert L de Groot
- Department for Theoretical and Computational Biophysics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, Göttingen, 37077 Germany
| | - Christian Griesinger
- Department of Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, Göttingen, 37077 Germany
| | - Donghan Lee
- Department of Medicine, James Graham Brown Cancer Center, University of Louisville, 505 S. Hancock St., Louisville, KY 40202, USA.
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6
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Singh RS, Walia AK, Khattar JS, Singh DP, Kennedy JF. Cyanobacterial lectins characteristics and their role as antiviral agents. Int J Biol Macromol 2017; 102:475-496. [PMID: 28437766 DOI: 10.1016/j.ijbiomac.2017.04.041] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/29/2017] [Accepted: 04/11/2017] [Indexed: 12/12/2022]
Abstract
Lectins are ubiquitous proteins/glycoproteins of non-immune origin that bind reversibly to carbohydrates in non-covalent and highly specific manner. These lectin-glycan interactions could be exploited for establishment of novel therapeutics, targeting the adherence stage of viruses and thus helpful in eliminating wide spread viral infections. Here the review focuses on the haemagglutination activity, carbohydrate specificity and characteristics of cyanobacterial lectins. Cyanobacterial lectins exhibiting high specificity towards mannose or complex glycans have potential role as anti-viral agents. Prospective role of cyanobacterial lectins in targeting various diseases of worldwide concern such as HIV, hepatitis, herpes, influenza and ebola viruses has been discussed extensively. The review also lays emphasis on recent studies involving structural analysis of glycan-lectin interactions which in turn influence their mechanism of action. Altogether, the promising approach of these cyanobacterial lectins provides insight into their use as antiviral agents.
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Affiliation(s)
- Ram Sarup Singh
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147002, Punjab, India.
| | - Amandeep Kaur Walia
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147002, Punjab, India
| | | | - Davinder Pal Singh
- Department of Botany, Punjabi University, Patiala 147 002, Punjab, India
| | - John F Kennedy
- Chembiotech Laboratories, Advanced Science & Technology Institute, Kyrewood House, Tenbury Wells, Worcestershire WR1 8SG, UK
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Fritz M, Quinn CM, Wang M, Hou G, Lu X, Koharudin LMI, Polenova T, Gronenborn AM. Toward Closing the Gap: Quantum Mechanical Calculations and Experimentally Measured Chemical Shifts of a Microcrystalline Lectin. J Phys Chem B 2017; 121:3574-3585. [PMID: 28001418 PMCID: PMC5465307 DOI: 10.1021/acs.jpcb.6b09479] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
NMR chemical shifts are exquisitely sensitive probes for conformation and dynamics in molecules and supramolecular assemblies. Although isotropic chemical shifts are easily measured with high accuracy and precision in conventional NMR experiments, they remain challenging to calculate quantum mechanically, particularly in inherently dynamic biological systems. Using a model benchmark protein, the 133-residue agglutinin from Oscillatoria agardhii (OAA), which has been extensively characterized by us previously, we have explored the integration of X-ray crystallography, solution NMR, MAS NMR, and quantum mechanics/molecular mechanics (QM/MM) calculations for analysis of 13Cα and 15NH isotropic chemical shifts. The influence of local interactions, quaternary contacts, and dynamics on the accuracy of calculated chemical shifts is analyzed. Our approach is broadly applicable and expected to be beneficial in chemical shift analysis and chemical-shift-based structure refinement for proteins and protein assemblies.
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Affiliation(s)
- Matthew Fritz
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
- Pittsburgh center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Ave., Pittsburgh, PA 15261, United States
| | - Caitlin M. Quinn
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
- Pittsburgh center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Ave., Pittsburgh, PA 15261, United States
| | - Mingzhang Wang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
- Pittsburgh center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Ave., Pittsburgh, PA 15261, United States
| | - Guangjin Hou
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| | - Xingyu Lu
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
- Pittsburgh center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Ave., Pittsburgh, PA 15261, United States
| | - Leonardus M. I. Koharudin
- Pittsburgh center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Ave., Pittsburgh, PA 15261, United States
- Department of Structural Biology, University of Pittsburgh School of Medicine,3501 Fifth Ave., Pittsburgh, PA 15261, United States
| | - Tatyana Polenova
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
- Pittsburgh center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Ave., Pittsburgh, PA 15261, United States
| | - Angela M. Gronenborn
- Pittsburgh center for HIV Protein Interactions, University of Pittsburgh School of Medicine, 1051 Biomedical Science Tower 3, 3501 Fifth Ave., Pittsburgh, PA 15261, United States
- Department of Structural Biology, University of Pittsburgh School of Medicine,3501 Fifth Ave., Pittsburgh, PA 15261, United States
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8
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Ge S, Lan F, Liang L, Ren N, Li L, Liu H, Yan M, Yu J. Ultrasensitive Photoelectrochemical Biosensing of Cell Surface N-Glycan Expression Based on the Enhancement of Nanogold-Assembled Mesoporous Silica Amplified by Graphene Quantum Dots and Hybridization Chain Reaction. ACS APPLIED MATERIALS & INTERFACES 2017; 9:6670-6678. [PMID: 28177218 DOI: 10.1021/acsami.6b11966] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An ultrasensitive photoelectrochemical (PEC) biosensor for N-glycan expression based on the enhancement of nanogold-assembled mesoporous silica nanoparticles (GMSNs) was fabricated, which also combined with multibranched hybridization chain reaction (mHCR) and graphene quantum dots (GQDs). In this work, the localized surface plasmon resonance, mHCR and GQDs-induced signal amplification strategies were integrated exquisitely and applied sufficiently. In the fabrication, after porous ZnO spheres immobilized on the Au nanorod-modified paper working electrode were sensitized by CdTe QDs, the GMSNs were assembled on the CdTe QDs. Then the photocurrent efficiency was improved by the sensitization of the CdTe QDs and the localized surface plasmon resonance of GMSNs. Successively, the products of mHCR with multiple biotins for multiple horseradish peroxidase binding and multiple branched arms for capturing the target cells were attached on the as-prepared electrode. The chemiluminescent (CL) emission with the aid of horseradish peroxidase served as an inner light source to excite photoactive materials for simplifying the instrument. Furthermore, the aptamer could capture the cancer cells by its highly efficient cell recognition ability, which avoided the conventional routing cell counting procedures. Meanwhile, the GQDs served as the signal amplication strategy, which was exerted in the process of N-glycan evaluation because the competitive absorption of exciting light and consumption of H2O2 served as the electron donor of the PEC system and the oxidant of the luminol-based CL system. This judiciously engineered biosensor offered a promising platform for the exploration of N-glycan-based physiological processes.
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Affiliation(s)
- Shenguang Ge
- School of Chemistry and Chemical Engineering and §School of Biological Science and Technology, University of Jinan , Jinan 250022, P.R. China
| | - Feifei Lan
- School of Chemistry and Chemical Engineering and §School of Biological Science and Technology, University of Jinan , Jinan 250022, P.R. China
| | - Linlin Liang
- School of Chemistry and Chemical Engineering and §School of Biological Science and Technology, University of Jinan , Jinan 250022, P.R. China
| | - Na Ren
- School of Chemistry and Chemical Engineering and §School of Biological Science and Technology, University of Jinan , Jinan 250022, P.R. China
| | - Li Li
- School of Chemistry and Chemical Engineering and §School of Biological Science and Technology, University of Jinan , Jinan 250022, P.R. China
| | - Haiyun Liu
- School of Chemistry and Chemical Engineering and §School of Biological Science and Technology, University of Jinan , Jinan 250022, P.R. China
| | - Mei Yan
- School of Chemistry and Chemical Engineering and §School of Biological Science and Technology, University of Jinan , Jinan 250022, P.R. China
| | - Jinghua Yu
- School of Chemistry and Chemical Engineering and §School of Biological Science and Technology, University of Jinan , Jinan 250022, P.R. China
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9
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Liang L, Lan F, Li L, Ge S, Yu J, Ren N, Liu H, Yan M. Paper analytical devices for dynamic evaluation of cell surface N-glycan expression via a bimodal biosensor based on multibranched hybridization chain reaction amplification. Biosens Bioelectron 2016; 86:756-763. [PMID: 27476057 DOI: 10.1016/j.bios.2016.07.078] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 07/10/2016] [Accepted: 07/22/2016] [Indexed: 11/17/2022]
Abstract
A novel colorimetric/fluorescence bimodal lab-on-paper cyto-device was fabricated based on concanavalin A (Con A)-integrating multibranched hybridization chain reaction (mHCR). The product of mHCR was modified PtCu nanochains (colorimetric signal label) and graphene quantum dot (fluorescence signal label) for in situ and dynamically evaluating cell surface N-glycan expression. In this strategy, preliminary detection was carried out through colorimetric method, if needed, then the fluorescence method was applied for a precise determination. Au-Ag-paper devices increased the surface areas and active sites for immobilizing larger amount of aptamers, and then specifically and efficiently captured more cancer cells. Moreover, it could effectively reduce the paper background fluorescence. Due to the specific recognition of Con A with mannose and the effective signal amplification of mHCR, the proposed strategy exhibited excellent high sensitivity for the cytosensing of MCF-7 cells ranging from 100 to 1.0×10(7) and 80-5.0×10(7) cellsmL(-1) with the detection limit of 33 and 26 cellsmL(-1) for colorimetric and fluorescence, respectively. More importantly, this strategy was successfully applied to dynamically monitor cell-surface multi-glycans expression on living cells under external stimuli of inhibitors as well as for N-glycan expression inhibitor screening. These results implied that this biosensor has potential in studying complex native glycan-related biological processes and elucidating the N-glycan-related diseases in biological and physiological processes.
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Affiliation(s)
- Linlin Liang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022 China
| | - Feifei Lan
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022 China
| | - Li Li
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022 China
| | - Shenguang Ge
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022 China; Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan,, Jinan, 250022 China.
| | - Jinghua Yu
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022 China
| | - Na Ren
- School of Biological Science and Technology, University of Jinan, Jinan, 250022 China
| | - Haiyun Liu
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022 China
| | - Mei Yan
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022 China
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10
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Carneiro MG, Reddy JG, Griesinger C, Lee D. Speeding-up exchange-mediated saturation transfer experiments by Fourier transform. JOURNAL OF BIOMOLECULAR NMR 2015; 63:237-244. [PMID: 26350257 DOI: 10.1007/s10858-015-9985-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 09/02/2015] [Indexed: 06/05/2023]
Abstract
Protein motions over various time scales are crucial for protein function. NMR relaxation dispersion experiments play a key role in explaining these motions. However, the study of slow conformational changes with lowly populated states remained elusive. The recently developed exchange-mediated saturation transfer experiments allow the detection and characterization of such motions, but require extensive measurement time. Here we show that, by making use of Fourier transform, the total acquisition time required to measure an exchange-mediated saturation transfer profile can be reduced by twofold in case that one applies linear prediction. In addition, we demonstrate that the analytical solution for R1ρ experiments can be used for fitting the exchange-mediated saturation transfer profile. Furthermore, we show that simultaneous analysis of exchange-mediated saturation transfer profiles with two different radio-frequency field strengths is required for accurate and precise characterization of the exchange process and the exchanging states.
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Affiliation(s)
- Marta G Carneiro
- Department of NMR-based Structural Biology, Max-Planck Institute for Biophysical chemistry, Am Fassberg 11, 37077, Goettingen, Germany
| | - Jithender G Reddy
- Department of NMR-based Structural Biology, Max-Planck Institute for Biophysical chemistry, Am Fassberg 11, 37077, Goettingen, Germany
| | - Christian Griesinger
- Department of NMR-based Structural Biology, Max-Planck Institute for Biophysical chemistry, Am Fassberg 11, 37077, Goettingen, Germany
| | - Donghan Lee
- Department of NMR-based Structural Biology, Max-Planck Institute for Biophysical chemistry, Am Fassberg 11, 37077, Goettingen, Germany.
- Department of Medicine, James Graham Brown Cancer Center, University of Louisville, 529 South Jackson Street, Louisville, KY, 40202, USA.
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11
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He Y, Li J, Liu Y. Reusable and dual-potential responses electrogenerated chemiluminescence biosensor for synchronously cytosensing and dynamic cell surface N-glycan evaluation. Anal Chem 2015; 87:9777-85. [PMID: 26393525 DOI: 10.1021/acs.analchem.5b02048] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A novel reusable and dual-potential responsive electrogenerated chemiluminescence (ECL) biosensor was fabricated for synchronous detection of cancer cells and their surface N-glycan. In this strategy, a cancer cell recognized aptamer hybridized with a capture DNA was immobilized on electrochemically reduced MoS2 nanosheets, and Ru(phen)3(2+) as ECL probes was intercalated into the grooves of the double-strand DNA. In the presence of target cells, the capture DNA and Ru(phen)3(2+) were released from the electrode interface owing to the specific interaction between cancer cells and the aptamer. Meanwhile, concanavalin A (Con A), a mannose binding protein, and a conjugated gold nanoparticle modified graphite-C3N4 (Con A@Au-C3N4) was used as a negative ECL nanoprobe and applied for the cell surface N-glycan evaluation owing to the excellent ECL properties of g-C3N4 at negative potential. The cytosensing and cell surface N-glycan evaluation could be simultaneously realized with high sensitivity and excellent selectivity based on the ratio of ECL intensity between the negative potential and positive potential (ΔECLn/ΔECLp), avoiding the traditional routing cell counting procedures. Moreover, the aptamer modified electrode can be regenerated in the presence of capture DNA solutions for cyclic utilization. As a proof-of-concept, the ECL cytosensor showed excellent performances for the analysis of the MCF-7 cancer cell and its surface N-glycan evaluation in human serum samples. The reusable and dual potential response ECL biosensor endows a feasibility tool for clinical diagnosis and drug screening especially in complex biological systems.
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Affiliation(s)
- Yao He
- Department of Chemistry, Beijing Key Laboratory for Analytical Methods and Instrumentation, Tsinghua University , Beijing 100084, China
| | - Jinghong Li
- Department of Chemistry, Beijing Key Laboratory for Analytical Methods and Instrumentation, Tsinghua University , Beijing 100084, China
| | - Yang Liu
- Department of Chemistry, Beijing Key Laboratory for Analytical Methods and Instrumentation, Tsinghua University , Beijing 100084, China
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