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Sung JS, Jung J, Kim TH, Kwon S, Bae HE, Kang MJ, Jose J, Lee M, Pyun JC. Epidermal Growth Factor Receptor (EGFR) Inhibitors Screened from Autodisplayed Fv-Antibody Library. Bioconjug Chem 2024. [PMID: 39197031 DOI: 10.1021/acs.bioconjchem.4c00256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2024]
Abstract
Inhibitors of the epithermal growth factor receptor (EGFR) were screened from an autodisplayed Fv-antibody library using an anti-EGF antibody. The Fv-antibody library was expressed on the outer membrane of Escherichia coli, which corresponds to the heavy chain VH region of immunoglobulin G. The library was constructed by randomizing the CDR3 region of expressed VH regions (11 amino acid residues) by site-directed mutagenesis. Using an anti-EGF antibody as a screening probe, amino acid sequences (CDR3 region) with antibody binding affinity were screened from the Fv-antibody library. These amino acid sequences were considered to have similar chemical properties to EGF, which can bind to EGFR. Two autodisplayed clones with Fv-antibodies against EGFR were screened from the Fv-antibody library, and the screened Fv-antibodies were expressed as soluble proteins. The binding affinity (KD) was estimated using an SPR biosensor, and the inhibitory activity of expressed Fv-antibodies was observed for PANC-1 pancreatic tumor cells and T98G glioblastoma cells using Western blot analysis of proteins in the EGFR-mediated signaling pathway. The viability of PANC-1 and T98G cells was observed to decrease via the inhibitory activity of expressed Fv-antibodies. Finally, interactions between Fv-antibodies and EGFR were analyzed by using molecular docking simulations.
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Affiliation(s)
- Jeong Soo Sung
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Republic of Korea
| | - Jaeyong Jung
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Republic of Korea
| | - Tae-Hun Kim
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Republic of Korea
| | - Soonil Kwon
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Republic of Korea
| | - Hyung Eun Bae
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Republic of Korea
| | - Min-Jung Kang
- Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Joachim Jose
- Institute of Pharmaceutical and Medical Chemistry, Universität Münster, Münster 48149, Germany
| | - Misu Lee
- Division of Life Sciences, College of Life Science and Bioengineering, Incheon National University, Incheon 22012, Korea
- Institute for New Drug Development, College of Life Science and Bioengineering, Incheon National University, Incheon 22012, South Korea
| | - Jae-Chul Pyun
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Republic of Korea
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Kim TH, Park JY, Jung J, Sung JS, Kwon S, Bae HE, Shin HJ, Kang MJ, Jose J, Pyun JC. A one-step immunoassay based on switching peptides for diagnosis of porcine epidemic diarrhea virus (PEDV) using screened Fv-antibodies. J Mater Chem B 2024; 12:3751-3763. [PMID: 38532694 DOI: 10.1039/d4tb00066h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
In this study, a one-step immunoassay for porcine epidemic diarrhea virus (PEDV) based on Fv-antibodies and switching peptides was developed, and the assay results of PEDV were obtained by just mixing samples without any further reaction or washing steps. The Fv-antibodies with binding affinity to the spike protein of PEDV were screened from the Fv-antibody library using the receptor-binding domain (RBD) of the spike protein as a screening probe. Screened Fv-antibodies with binding affinities to the RBD antigen were expressed, and the binding constants (KD) were calculated to be 83-142 nM. The one-step immunoassay for the detection of PEDV was configured as a displacement immunoassay using a fluorescence-labeled switching peptide. The one-step immunoassay based on switching peptides was performed using PEDV, and the limit of detection (LOD) values for PEDV detection were estimated to be Ct = 39.7-36.4. Compared with the LOD value for a conventional lateral flow immunoassay (Ct = 33.0), the one-step immunoassay showed a remarkably improved LOD for the detection of PEDV. Finally, the interaction between the screened Fv-antibodies and the PEDV RBD was investigated using docking simulations and compared with the amino acid sequences of the receptors on host cells, such as aminopeptidase N (APN) and angiotensin-converting enzyme-2 (ACE-2).
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Affiliation(s)
- Tae-Hun Kim
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Jae-Yeon Park
- College of Veterinary Medicine, Chungnam National University, Daejeon, 34134, South Korea
| | - Jaeyong Jung
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Jeong Soo Sung
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Soonil Kwon
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Hyung Eun Bae
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Hyun-Jin Shin
- College of Veterinary Medicine, Chungnam National University, Daejeon, 34134, South Korea
| | - Min-Jung Kang
- Korea Institute of Science and Technology (KIST), Seoul, Korea
| | - Joachim Jose
- Institute of Pharmaceutical and Medical Chemistry, Westfälischen Wilhelms-Universität Münster, Muenster, Germany
| | - Jae-Chul Pyun
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea.
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Hardebeck S, Jácobo Goebbels N, Michalski C, Schreiber S, Jose J. Identification of a potent PCNA-p15-interaction inhibitor by autodisplay-based peptide library screening. Microb Biotechnol 2024; 17:e14471. [PMID: 38646975 PMCID: PMC11033925 DOI: 10.1111/1751-7915.14471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 03/04/2024] [Accepted: 04/04/2024] [Indexed: 04/25/2024] Open
Abstract
Proliferating cell nuclear antigen (PCNA) is an essential factor for DNA metabolism. The influence of PCNA on DNA replication and repair, combined with the high expression rate of PCNA in various tumours renders PCNA a promising target for cancer therapy. In this context, an autodisplay-based screening method was developed to identify peptidic PCNA interaction inhibitors. A 12-mer randomized peptide library consisting of 2.54 × 106 colony-forming units was constructed and displayed at the surface of Escherichia coli BL21 (DE3) cells by autodisplay. Cells exhibiting an enhanced binding to fluorescent mScarlet-I-PCNA were enriched in four sorting rounds by flow cytometry. This led to the discovery of five peptide variants with affinity to mScarlet-I-PCNA. Among these, P3 (TCPLRWITHDHP) exhibited the highest binding signal. Subsequent flow cytometric analysis revealed a dissociation constant of 0.62 μM for PCNA-P3 interaction. Furthermore, the inhibition of PCNA interactions was investigated using p15, a PIP-box containing protein involved in DNA replication and repair. P3 inhibited the PCNA-p1551-70 interaction with a half maximal inhibitory activity of 16.2 μM, characterizing P3 as a potent inhibitor of the PCNA-p15 interaction.
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Affiliation(s)
- Sarah Hardebeck
- University of MünsterInstitute of Pharmaceutical and Medicinal ChemistryMünsterGermany
| | | | - Caroline Michalski
- University of MünsterInstitute of Pharmaceutical and Medicinal ChemistryMünsterGermany
| | - Sebastian Schreiber
- University of MünsterInstitute of Pharmaceutical and Medicinal ChemistryMünsterGermany
| | - Joachim Jose
- University of MünsterInstitute of Pharmaceutical and Medicinal ChemistryMünsterGermany
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Gercke D, Lenz F, Jose J. Split-GFP complementation at the bacterial cell surface for antibody-free labeling and quantification of heterologous protein display. Enzyme Microb Technol 2024; 174:110391. [PMID: 38176324 DOI: 10.1016/j.enzmictec.2023.110391] [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: 10/18/2023] [Revised: 12/12/2023] [Accepted: 12/18/2023] [Indexed: 01/06/2024]
Abstract
The split-GFP system is a versatile tool with numerous applications, but it has been underutilized for the labeling of heterologous surface-displayed proteins. By inserting the 16 amino acid sequence of the GFP11-tag between a protein of interest and an autotransporter protein, it is possible to present a protein at the outer membrane of gram-negative bacteria and to fluorescently label it by complementation with externally added GFP1-10. The labeled cells could be clearly discerned from cells without the protein of interest using flow cytometry and the insertion of the GFP11-tag caused no significant alteration of the catalytic activity for the tested model enzyme CsBglA. Furthermore, the amount of the protein of interest on the cells could be quantified by comparing the green fluorescence resulting from the complementation to that of standards with known concentrations. This allows a precise characterization of whole-cell biocatalysts, which is difficult with existing methods. The split-GFP complementation approach was shown to be specific, in a similar manner as commercial antibodies. It is cost-efficient, minimizes the possibility of adverse effects on protein expression or solubility, and can be performed at high throughput.
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Affiliation(s)
- David Gercke
- Universität Münster, Institut für Pharmazeutische und Medizinische Chemie, PharmaCampus, Corrensstrasse 48, 48149 Münster, Germany
| | - Florian Lenz
- Universität Münster, Institut für Pharmazeutische und Medizinische Chemie, PharmaCampus, Corrensstrasse 48, 48149 Münster, Germany
| | - Joachim Jose
- Universität Münster, Institut für Pharmazeutische und Medizinische Chemie, PharmaCampus, Corrensstrasse 48, 48149 Münster, Germany.
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Jung J, Sung JS, Bong JH, Kim TH, Kwon S, Bae HE, Kang MJ, Jose J, Lee M, Shin HJ, Pyun JC. One-step immunoassay of SARS-CoV-2 using screened Fv-antibodies and switching peptides. Biosens Bioelectron 2024; 245:115834. [PMID: 37995624 DOI: 10.1016/j.bios.2023.115834] [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: 08/04/2023] [Revised: 10/21/2023] [Accepted: 11/09/2023] [Indexed: 11/25/2023]
Abstract
The Fv-antibodies were correponded to VH region of immunoglobulin G, which were composed of three complementarity determining regions (CDRs) for the specific binding of antigens. In this work, the Fv-antibodies against SARS-CoV-2 spike protein (SP) were screened from an autodisplayed Fv-antibody library which was expressed on E. coli outer membrane, and the receptor binding domain (RBD) of SP was used as a screening probe. The screened target clones were analyzed to have quantitative binding properties to the RBD, and the Fv-antibodies from the screened target clones were expressed as soluble proteins. The binding affinity (KD) of expressed Fv-antibodies to the RBD was estimated to be 70-85 nM using SPR biosensor. The specific binding properties of Fv-antibodies were analyzed for pseudo-virus particles with SARS-CoV-2 SP on the Lenti-virus envelope, such as wild type (Wuhan-1) and variants (Delta, Omicron BA.2, Omicron BA.4/5) using a SPR biosensor. The detection of real SARS-CoV-2 (Wild type, Wuhan-1) based on a SPR biosensor was also presented using the Fv-antibodies with the binding constant (KD) of cycle threshold value (Ct) = 33.8-32.9 (2.19-4.08 copies/μL) and LOD of 0.67-0.83 copies/μL (Ct = 35.5-35.2). Finally, one-step immunoassay based on switching peptide was demonstrated for the detection of the real SARS-CoV-2 (Wuhan-1) without any washing step. The binding constant (KD) was estimated to be Ct = 35.2-33.9 (0.83-2.04 copies/μL), and LOD was estimated to be 0.14-0.47 copies/μL (Ct = 37.8-36.0). Considering the LOD of the conventional RT-PCR (Ct = 35), the LOD of the one-step immunoassay based on the switching peptide was determined to be feasible for the medical diagnosis of COVID-19.
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Affiliation(s)
- Jaeyong Jung
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Jeong Soo Sung
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Ji-Hong Bong
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Tae-Hun Kim
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Soonil Kwon
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Hyung Eun Bae
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Min-Jung Kang
- Korea Institute of Science and Technology (KIST), Seoul, 02456, South Korea
| | - Joachim Jose
- Institute of Pharmaceutical and Medical Chemistry, Westphalian Wilhelms-University Münster, Münster 48149, Germany
| | - Misu Lee
- Institute for New Drug Development, College of Life Science and Bioengineering, Incheon National University, Incheon, 22012, South Korea
| | - Hyun-Jin Shin
- College of Veterinary Medicine, Chungnam National University, Daejeon, 34134, South Korea
| | - Jae-Chul Pyun
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea.
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Sung J, Kim S, Jung J, Kim TH, Kwon S, Bae HE, Kang MJ, Jose J, Lee M, Pyun JC. Monoamine Oxidase-A (MAO-A) Inhibitors Screened from the Autodisplayed Fv-Antibody Library. ACS Pharmacol Transl Sci 2024; 7:150-160. [PMID: 38230273 PMCID: PMC10789138 DOI: 10.1021/acsptsci.3c00204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 11/11/2023] [Accepted: 12/13/2023] [Indexed: 01/18/2024]
Abstract
Serotonin-like mimotopes were screened from the Fv-antibody library to be used as inhibitors against monoamine oxidase A (MAO-A). The Fv-antibody [corresponding to the VH region of immunoglobulin G (IgG)] consists of three complementarity-determining regions and four frame regions. The Fv-antibody library was prepared by site-directed mutagenesis of CDR3, which consists of 11 amino acid residues. Three target clones were screened from the Fv-antibody library, and the binding affinity of the screened clones to the monoclonal anti-serotonin antibody was analyzed using fluorescence-activated cell sorting. The screened Fv-antibodies were expressed as soluble proteins fused with green fluorescence protein. Additionally, the screened CDR3 regions (11 residues) of the selected Fv-antibodies were synthesized as peptides with linking amino acid residues. The binding constants (KD) of the three serotonin-like mimotopes (Fv-antibodies and peptides) were estimated using a surface plasmon resonance biosensor. The inhibitory activity (IC50) of the serotonin-like mimotopes (Fv-antibodies and peptides) was estimated separately for MAO-A and MAO-B enzymes and compared with that of conventional inhibitors. Finally, the screened serotonin-like mimotopes were used to treat a cell line (SH-SY5Y, ATCC code: CRL-2266) expressing serotonin receptors. This was done to confirm the following two aspects: (1) the binding of mimotopes to the serotonin receptors on the cell surface and (2) the inhibitory activity of mimotopes against MAO-A enzymes in the cell lysates.
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Affiliation(s)
- Jeong
Soo Sung
- Department
of Materials Science and Engineering, Yonsei
University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea
| | - Seunghwan Kim
- Division
of Life Sciences, College of Life Science and Bioengineering, Incheon National University, Incheon 22012, Korea
| | - Jaeyong Jung
- Department
of Materials Science and Engineering, Yonsei
University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea
| | - Tae-Hun Kim
- Department
of Materials Science and Engineering, Yonsei
University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea
| | - Soonil Kwon
- Department
of Materials Science and Engineering, Yonsei
University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea
| | - Hyung Eun Bae
- Department
of Materials Science and Engineering, Yonsei
University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea
| | - Min-Jung Kang
- Korea
Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Joachim Jose
- Institute
of Pharmaceutical and Medical Chemistry, Westfälischen Wilhelms-Universität Münster, Müenster 48149, Germany
| | - Misu Lee
- Division
of Life Sciences, College of Life Science and Bioengineering, Incheon National University, Incheon 22012, Korea
- Institute
for New Drug Development, Incheon National
University, Incheon 22012, Korea
| | - Jae-Chul Pyun
- Department
of Materials Science and Engineering, Yonsei
University, 50 Yonsei-Ro, Seodaemun-Gu, Seoul 03722, Korea
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