1
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Chheda PR, Simmons N, Shi Z. Hydrophobic Surfactant-DNA Complex (Surf-DNA) Enables DNA-Encoded-Library-Compatible Decarboxylative Arylation under Anhydrous Conditions. Org Lett 2024; 26:4365-4370. [PMID: 38743933 DOI: 10.1021/acs.orglett.4c01398] [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: 05/16/2024]
Abstract
DNA-encoded libraries (DELs) are a key technology for identifying small-molecule hits in both the pharmaceutical industry and academia, but their chemical diversity is largely limited to water-compatible reactions to aid in the solubility and integrity of encoding DNA tags. To broaden the DEL chemical space, we present a workflow utilizing DNA-cationic surfactant complexation that enables dissolution and reactions on-DNA in anhydrous organic solvents. We demonstrate its utility by developing DEL-compatible photoredox decarboxylative C(sp2)-C(sp3) coupling under water-free conditions. The workflow is optimized for the 96-well format necessary for large-scale DEL productions, and it enables screening and optimization of DEL-compatible reactions in organic solvents.
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Affiliation(s)
- Pratik R Chheda
- Discovery Chemistry, Janssen Research & Development, LLC, San Diego, California 92121, United States
| | - Nicholas Simmons
- Discovery Chemistry, Janssen Research & Development, LLC, San Diego, California 92121, United States
| | - Zhicai Shi
- Discovery Chemistry, Janssen Research & Development, LLC, Spring House, Pennsylvania 19477, United States
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2
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Cai B, Krusemark CJ. Multiplexed Small‐Molecule‐Ligand Binding Assays by Affinity Labeling and DNA Sequence Analysis**. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202113515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bo Cai
- Department of Medicinal Chemistry and Molecular Pharmacology Purdue Center for Cancer Research Purdue University West Lafayette IN 47907 USA
| | - Casey J. Krusemark
- Department of Medicinal Chemistry and Molecular Pharmacology Purdue Center for Cancer Research Purdue University West Lafayette IN 47907 USA
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3
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Cai B, Krusemark CJ. Multiplexed Small-Molecule-Ligand Binding Assays by Affinity Labeling and DNA Sequence Analysis. Angew Chem Int Ed Engl 2022; 61:e202113515. [PMID: 34758183 PMCID: PMC8748404 DOI: 10.1002/anie.202113515] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/04/2021] [Indexed: 01/19/2023]
Abstract
Small-molecule binding assays to target proteins are a core component of drug discovery and development. While a number of assay formats are available, significant drawbacks still remain in cost, sensitivity, and throughput. To improve assays by capitalizing on the power of DNA sequence analysis, we have developed an assay method that combines DNA encoding with split-and-pool sample handling. The approach involves affinity labeling of DNA-linked ligands to a protein target. Critically, the labeling event assesses ligand binding and enables subsequent pooling of several samples. Application of a purifying selection on the pool for protein-labeled DNAs allows detection of ligand binding by quantification of DNA barcodes. We demonstrate the approach in both ligand displacement and direct binding formats and demonstrate its utility in determination of relative ligand affinity, profiling ligand specificity, and high-throughput small-molecule screening.
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Affiliation(s)
- Bo Cai
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue Center for Cancer Research, Purdue University, West Lafayette, IN, 47907, USA
| | - Casey J Krusemark
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue Center for Cancer Research, Purdue University, West Lafayette, IN, 47907, USA
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4
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Potowski M, Kunig VBK, Eberlein L, Vakalopoulos A, Kast SM, Brunschweiger A. Chemisch stabilisierte DNA‐Codes für DNA‐kodierte Chemie. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Marco Potowski
- TU Dortmund University Faculty of Chemistry and Chemical Biology Medicinal Chemistry Otto-Hahn-Straße 6 44227 Dortmund Deutschland
| | - Verena B. K. Kunig
- TU Dortmund University Faculty of Chemistry and Chemical Biology Medicinal Chemistry Otto-Hahn-Straße 6 44227 Dortmund Deutschland
| | - Lukas Eberlein
- TU Dortmund University Faculty of Chemistry and Chemical Biology Physical Chemistry Otto-Hahn-Straße 4a 44227 Dortmund Deutschland
| | | | - Stefan M. Kast
- TU Dortmund University Faculty of Chemistry and Chemical Biology Physical Chemistry Otto-Hahn-Straße 4a 44227 Dortmund Deutschland
| | - Andreas Brunschweiger
- TU Dortmund University Faculty of Chemistry and Chemical Biology Medicinal Chemistry Otto-Hahn-Straße 6 44227 Dortmund Deutschland
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5
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Potowski M, Kunig VBK, Eberlein L, Vakalopoulos A, Kast SM, Brunschweiger A. Chemically Stabilized DNA Barcodes for DNA-Encoded Chemistry. Angew Chem Int Ed Engl 2021; 60:19744-19749. [PMID: 34153170 PMCID: PMC8456907 DOI: 10.1002/anie.202104348] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/10/2021] [Indexed: 12/18/2022]
Abstract
DNA‐encoded compound libraries are a widely used small molecule screening technology. One important aim in library design is the coverage of chemical space through structurally diverse molecules. Yet, the chemical reactivity of native DNA barcodes limits the toolbox of reactions for library design. Substituting the chemically vulnerable purines by 7‐deazaadenine, which exhibits tautomerization stability similar to natural adenine with respect to the formation of stable Watson–Crick pairs, yielded ligation‐competent, amplifiable, and readable DNA barcodes for encoded chemistry with enhanced stability against protic acid‐ and metal ion‐promoted depurination. The barcode stability allowed for straightforward translation of 16 exemplary reactions that included isocyanide multicomponent reactions, acid‐promoted Pictet–Spengler and Biginelli reactions, and metal‐promoted pyrazole syntheses on controlled pore glass‐coupled barcodes for diverse DEL design. The Boc protective group of reaction products offered a convenient handle for encoded compound purification.
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Affiliation(s)
- Marco Potowski
- TU Dortmund University, Faculty of Chemistry and Chemical Biology, Medicinal Chemistry, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
| | - Verena B K Kunig
- TU Dortmund University, Faculty of Chemistry and Chemical Biology, Medicinal Chemistry, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
| | - Lukas Eberlein
- TU Dortmund University, Faculty of Chemistry and Chemical Biology, Physical Chemistry, Otto-Hahn-Strasse 4a, 44227, Dortmund, Germany
| | | | - Stefan M Kast
- TU Dortmund University, Faculty of Chemistry and Chemical Biology, Physical Chemistry, Otto-Hahn-Strasse 4a, 44227, Dortmund, Germany
| | - Andreas Brunschweiger
- TU Dortmund University, Faculty of Chemistry and Chemical Biology, Medicinal Chemistry, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
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6
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Ratnayake AS, Flanagan ME, Foley TL, Hultgren SL, Bellenger J, Montgomery JI, Lall MS, Liu B, Ryder T, Kölmel DK, Shavnya A, Feng X, Lefker B, Byrnes LJ, Sahasrabudhe PV, Farley KA, Chen S, Wan J. Toward the assembly and characterization of an encoded library hit confirmation platform: Bead-Assisted Ligand Isolation Mass Spectrometry (BALI-MS). Bioorg Med Chem 2021; 41:116205. [PMID: 34000509 DOI: 10.1016/j.bmc.2021.116205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/27/2021] [Accepted: 04/28/2021] [Indexed: 12/15/2022]
Abstract
The ability to predict chemical structure from DNA sequence has to date been a necessary cornerstone of DNA-encoded library technology. DNA-encoded libraries (DELs) are typically screened by immobilized affinity selection and enriched library members are identified by counting the number of times an individual compound's sequence is observed in the resultant dataset. Those with high signal reads (DEL hits) are subsequently followed up through off-DNA synthesis of the predicted small molecule structures. However, hits followed-up in this manner often fail to translate to confirmed ligands. To address this low conversion rate of DEL hits to off-DNA ligands, we have developed an approach that eliminates the reliance on chemical structure prediction from DNA sequence. Here we describe our method of combining non-combinatorial resynthesis on-DNA following library procedures as a rapid means to assess the probable molecules attached to the DNA barcode. Furthermore, we apply our Bead-Assisted Ligand Isolation Mass Spectrometry (BALI-MS) technique to identify the true binders found within the mixtures of on-DNA synthesis products. Finally, we describe a Normalized Enrichment (NE) metric that allows for the quantitative assessment of affinity selection in these studies. We exemplify how this combined approach enables the identification of putative hit matter against a clinically relevant therapeutic target bisphosphoglycerate mutase, BPGM.
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Affiliation(s)
- Anokha S Ratnayake
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Mark E Flanagan
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Timothy L Foley
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Scott L Hultgren
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Justin Bellenger
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Justin I Montgomery
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Manjinder S Lall
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Bo Liu
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Tim Ryder
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Dominik K Kölmel
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Andre Shavnya
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Xidong Feng
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Bruce Lefker
- Lefker Biopharma Consulting LLC, Arlington, MA 02474 United States.
| | - Laura J Byrnes
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Parag V Sahasrabudhe
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Kathleen A Farley
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, CT 06340, United States.
| | - Shi Chen
- HitGen Inc., Shuangliu District, Chengdu, China.
| | - Jinqiao Wan
- HitGen Inc., Shuangliu District, Chengdu, China.
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7
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Deng Y, Peng J, Xiong F, Song Y, Zhou Y, Zhang J, Lam FS, Xie C, Shen W, Huang Y, Meng L, Li X. Selection of DNA‐Encoded Dynamic Chemical Libraries for Direct Inhibitor Discovery. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005070] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Yuqing Deng
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry The University of Hong Kong Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission Pokfulam Road Hong Kong SAR China
| | - Jianzhao Peng
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry The University of Hong Kong Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission Pokfulam Road Hong Kong SAR China
- Department of Chemistry Southern University of Science and Technology China 1088 Xueyuan Road Shenzhen China
| | - Feng Xiong
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry The University of Hong Kong Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission Pokfulam Road Hong Kong SAR China
| | - Yinan Song
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry The University of Hong Kong Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission Pokfulam Road Hong Kong SAR China
| | - Yu Zhou
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry The University of Hong Kong Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission Pokfulam Road Hong Kong SAR China
| | - Jianfu Zhang
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry The University of Hong Kong Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission Pokfulam Road Hong Kong SAR China
| | - Fong Sang Lam
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry The University of Hong Kong Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission Pokfulam Road Hong Kong SAR China
| | - Chao Xie
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry The University of Hong Kong Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission Pokfulam Road Hong Kong SAR China
| | - Wenyin Shen
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry The University of Hong Kong Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission Pokfulam Road Hong Kong SAR China
| | - Yiran Huang
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry The University of Hong Kong Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission Pokfulam Road Hong Kong SAR China
| | - Ling Meng
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry The University of Hong Kong Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission Pokfulam Road Hong Kong SAR China
| | - Xiaoyu Li
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry The University of Hong Kong Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission Pokfulam Road Hong Kong SAR China
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8
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Deng Y, Peng J, Xiong F, Song Y, Zhou Y, Zhang J, Lam FS, Xie C, Shen W, Huang Y, Meng L, Li X. Selection of DNA-Encoded Dynamic Chemical Libraries for Direct Inhibitor Discovery. Angew Chem Int Ed Engl 2020; 59:14965-14972. [PMID: 32436364 DOI: 10.1002/anie.202005070] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/18/2020] [Indexed: 11/11/2022]
Abstract
Dynamic combinatorial libraries (DCLs) is a powerful tool for ligand discovery in biomedical research; however, the application of DCLs has been hampered by their low diversity. Recently, the concept of DNA encoding has been employed in DCLs to create DNA-encoded dynamic libraries (DEDLs); however, all current DEDLs are limited to fragment identification, and a challenging process of fragment linking is required after selection. We report an anchor-directed DEDL approach that can identify full ligand structures from large-scale DEDLs. This method is also able to convert unbiased libraries into focused ones targeting specific protein classes. We demonstrated this method by selecting DEDLs against five proteins, and novel inhibitors were identified for all targets. Notably, several selective BD1/BD2 inhibitors were identified from the selections against bromodomain 4 (BRD4), an important anti-cancer drug target. This work may provide a broadly applicable method for inhibitor discovery.
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Affiliation(s)
- Yuqing Deng
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission, Pokfulam Road, Hong Kong SAR, China
| | - Jianzhao Peng
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission, Pokfulam Road, Hong Kong SAR, China.,Department of Chemistry, Southern University of Science and Technology China, 1088 Xueyuan Road, Shenzhen, China
| | - Feng Xiong
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission, Pokfulam Road, Hong Kong SAR, China
| | - Yinan Song
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission, Pokfulam Road, Hong Kong SAR, China
| | - Yu Zhou
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission, Pokfulam Road, Hong Kong SAR, China
| | - Jianfu Zhang
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission, Pokfulam Road, Hong Kong SAR, China
| | - Fong Sang Lam
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission, Pokfulam Road, Hong Kong SAR, China
| | - Chao Xie
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission, Pokfulam Road, Hong Kong SAR, China
| | - Wenyin Shen
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission, Pokfulam Road, Hong Kong SAR, China
| | - Yiran Huang
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission, Pokfulam Road, Hong Kong SAR, China
| | - Ling Meng
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission, Pokfulam Road, Hong Kong SAR, China
| | - Xiaoyu Li
- Department of Chemistry and the State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Laboratory for Synthetic Chemistry and Chemical Biology of Health@InnoHK of Innovation and Technology Commission, Pokfulam Road, Hong Kong SAR, China
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9
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Sannino A, Gabriele E, Bigatti M, Mulatto S, Piazzi J, Scheuermann J, Neri D, Donckele EJ, Samain F. Quantitative Assessment of Affinity Selection Performance by Using DNA‐Encoded Chemical Libraries. Chembiochem 2019; 20:955-962. [DOI: 10.1002/cbic.201800766] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Indexed: 12/14/2022]
Affiliation(s)
| | - Elena Gabriele
- Philochem AG Libernstrasse 3 8112 Otelfingen Switzerland
| | | | - Sara Mulatto
- Philochem AG Libernstrasse 3 8112 Otelfingen Switzerland
| | - Jacopo Piazzi
- Philochem AG Libernstrasse 3 8112 Otelfingen Switzerland
| | - Jörg Scheuermann
- Department of Chemistry and Applied BiosciencesSwiss Federal Institute of Technology (ETH Zürich) Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Dario Neri
- Department of Chemistry and Applied BiosciencesSwiss Federal Institute of Technology (ETH Zürich) Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | | | - Florent Samain
- Philochem AG Libernstrasse 3 8112 Otelfingen Switzerland
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10
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Favalli N, Biendl S, Hartmann M, Piazzi J, Sladojevich F, Gräslund S, Brown PJ, Näreoja K, Schüler H, Scheuermann J, Franzini R, Neri D. A DNA-Encoded Library of Chemical Compounds Based on Common Scaffolding Structures Reveals the Impact of Ligand Geometry on Protein Recognition. ChemMedChem 2018; 13:1303-1307. [PMID: 29856130 PMCID: PMC6126618 DOI: 10.1002/cmdc.201800193] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Indexed: 11/06/2022]
Abstract
A DNA-encoded chemical library (DECL) with 1.2 million compounds was synthesized by combinatorial reaction of seven central scaffolds with two sets of 343×492 building blocks. Library screening by affinity capture revealed that for some target proteins, the chemical nature of building blocks dominated the selection results, whereas for other proteins, the central scaffold also crucially contributed to ligand affinity. Molecules based on a 3,5-bis(aminomethyl)benzoic acid core structure were found to bind human serum albumin with a Kd value of 6 nm, while compounds with the same substituents on an equidistant but flexible l-lysine scaffold showed 140-fold lower affinity. A 18 nm tankyrase-1 binder featured l-lysine as linking moiety, while molecules based on d-Lysine or (2S,4S)-amino-l-proline showed no detectable binding to the target. This work suggests that central scaffolds which predispose the orientation of chemical building blocks toward the protein target may enhance the screening productivity of encoded libraries.
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Affiliation(s)
- Nicholas Favalli
- Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 4, 8093 Zürich (Switzerland)
| | - Stefan Biendl
- Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 4, 8093 Zürich (Switzerland)
| | - Marco Hartmann
- Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 4, 8093 Zürich (Switzerland)
| | | | - Filippo Sladojevich
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, F. Hoffmann-La, Roche Ltd., Grenzacherstrasse 124, 4070 Basel (Switzerland)
| | - Susanne Gräslund
- Structural Genomics Consortium (SGC), University of Toronto, Toronto, M5G 1L7 (Canada)
- Department Structural Biology, Dept. of Medical Biochemistry and Biophysics (MBB), Karolinska Institutet, Scheeles väg 2, S-17177 Stockholm
| | - Peter J. Brown
- Structural Genomics Consortium (SGC), University of Toronto, Toronto, M5G 1L7 (Canada)
| | - Katja Näreoja
- Department Structural Biology, Dept. of Medical Biochemistry and Biophysics (MBB), Karolinska Institutet, Scheeles väg 2, S-17177 Stockholm
| | - Herwig Schüler
- Department Structural Biology, Dept. of Medical Biochemistry and Biophysics (MBB), Karolinska Institutet, Scheeles väg 2, S-17177 Stockholm
| | - Jörg Scheuermann
- Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 4, 8093 Zürich (Switzerland)
| | - Raphael Franzini
- Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 4, 8093 Zürich (Switzerland)
- University of Utah, College of Pharmacy, 30 South 2000 East, Salt Lake City, UT 84112 (801) 581-6731
| | - Dario Neri
- Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 4, 8093 Zürich (Switzerland)
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11
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Li Y, Zimmermann G, Scheuermann J, Neri D. Quantitative PCR is a Valuable Tool to Monitor the Performance of DNA-Encoded Chemical Library Selections. Chembiochem 2017; 18:848-852. [PMID: 28220596 PMCID: PMC5606288 DOI: 10.1002/cbic.201600626] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Indexed: 01/25/2023]
Abstract
Phage-display libraries and DNA-encoded chemical libraries (DECLs) represent useful tools for the isolation of specific binding molecules from large combinatorial sets of compounds. With both methods, specific binders are recovered at the end of affinity capture procedures by using target proteins of interest immobilized on a solid support. However, although the efficiency of phage-display selections is routinely quantified by counting the phage titer before and after the affinity capture step, no similar quantification procedures have been reported for the characterization of DECL selections. In this article, we describe the potential and limitations of quantitative PCR (qPCR) methods for the evaluation of selection efficiency by using a combinatorial chemical library with more than 35 million compounds. In the experimental conditions chosen for the selections, a quantification of DNA input/recovery over five orders of magnitude could be performed, revealing a successful enrichment of abundant binders, which could be confirmed by DNA sequencing. qPCR provided rapid information about the performance of selections, thus facilitating the optimization of experimental conditions.
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Affiliation(s)
- Yizhou Li
- Department of Chemistry and Applied Biosciences Swiss Federal
Institute of Technology (ETH Zürich) Vladimir-Prelog-Weg 3, CH-8093
Zürich (Switzerland)
| | - Gunther Zimmermann
- Department of Chemistry and Applied Biosciences Swiss Federal
Institute of Technology (ETH Zürich) Vladimir-Prelog-Weg 3, CH-8093
Zürich (Switzerland)
| | - Jörg Scheuermann
- Department of Chemistry and Applied Biosciences Swiss Federal
Institute of Technology (ETH Zürich) Vladimir-Prelog-Weg 3, CH-8093
Zürich (Switzerland)
| | - Dario Neri
- Department of Chemistry and Applied Biosciences Swiss Federal
Institute of Technology (ETH Zürich) Vladimir-Prelog-Weg 3, CH-8093
Zürich (Switzerland)
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12
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Zimmermann G, Li Y, Rieder U, Mattarella M, Neri D, Scheuermann J. Hit-Validation Methodologies for Ligands Isolated from DNA-Encoded Chemical Libraries. Chembiochem 2017; 18:853-857. [PMID: 28067010 DOI: 10.1002/cbic.201600637] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Indexed: 01/13/2023]
Abstract
DNA-encoded chemical libraries (DECLs) are large collections of compounds linked to DNA fragments, serving as amplifiable barcodes, which can be screened on target proteins of interest. In typical DECL selections, preferential binders are identified by high-throughput DNA sequencing, by comparing their frequency before and after the affinity capture step. Hits identified in this procedure need to be confirmed, by resynthesis and by performing affinity measurements. In this article we present new methods based on hybridization of oligonucleotide conjugates with fluorescently labeled complementary oligonucleotides; these facilitate the determination of affinity constants and kinetic dissociation constants. The experimental procedures were demonstrated with acetazolamide, a binder to carbonic anhydrase IX with a dissociation constant in the nanomolar range. The detection of binding events was compatible not only with fluorescence polarization methodologies, but also with Alphascreen technology and with microscale thermophoresis.
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Affiliation(s)
- Gunther Zimmermann
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Yizhou Li
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Ulrike Rieder
- Philochem AG, Libernstrasse 3, 8112, Otelfingen, Switzerland
| | | | - Dario Neri
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Jörg Scheuermann
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
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13
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Yuen LH, Franzini RM. Achievements, Challenges, and Opportunities in DNA-Encoded Library Research: An Academic Point of View. Chembiochem 2017; 18:829-836. [DOI: 10.1002/cbic.201600567] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Lik Hang Yuen
- Department of Medicinal Chemistry; University of Utah; 30 S 2000 E Salt Lake City UT 84113 USA
| | - Raphael M. Franzini
- Department of Medicinal Chemistry; University of Utah; 30 S 2000 E Salt Lake City UT 84113 USA
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Satz AL. Simulated Screens of DNA Encoded Libraries: The Potential Influence of Chemical Synthesis Fidelity on Interpretation of Structure-Activity Relationships. ACS COMBINATORIAL SCIENCE 2016; 18:415-24. [PMID: 27116029 DOI: 10.1021/acscombsci.6b00001] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Simulated screening of DNA encoded libraries indicates that the presence of truncated byproducts complicates the relationship between library member enrichment and equilibrium association constant (these truncates result from incomplete chemical reactions during library synthesis). Further, simulations indicate that some patterns observed in reported experimental data may result from the presence of truncated byproducts in the library mixture and not structure-activity relationships. Potential experimental methods of minimizing the presence of truncates are assessed via simulation; the relationship between enrichment and equilibrium association constant for libraries of differing purities is investigated. Data aggregation techniques are demonstrated that allow for more accurate analysis of screening results, in particular when the screened library contains significant quantities of truncates.
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Affiliation(s)
- Alexander L. Satz
- Roche Innovation Center Basel, Grenzacherstrasse
124, 4070 Basel, Switzerland
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