1
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Höing A, Struth R, Beuck C, Rafieiolhosseini N, Hoffmann D, Stauber RH, Bayer P, Niemeyer J, Knauer SK. Dual activity inhibition of threonine aspartase 1 by a single bisphosphate ligand. RSC Adv 2022; 12:34176-34184. [PMID: 36545626 PMCID: PMC9709806 DOI: 10.1039/d2ra06019a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 11/23/2022] [Indexed: 12/05/2022] Open
Abstract
Therapy resistance remains a challenge for the clinics. Here, dual-active chemicals that simultaneously inhibit independent functions in disease-relevant proteins are desired though highly challenging. As a model, we here addressed the unique protease threonine aspartase 1, involved in various cancers. We hypothesized that targeting basic residues in its bipartite nuclear localization signal (NLS) by precise bisphosphate ligands inhibits additional steps required for protease activity. We report the bisphosphate anionic bivalent inhibitor 11d, selectively binding to the basic NLS cluster (220KKRR223) with high affinity (K D = 300 nM), thereby disrupting its interaction and function with Importin α (IC50 = 6 μM). Cell-free assays revealed that 11d additionally affected the protease's catalytic substrate trans-cleavage activity. Importantly, functional assays comprehensively demonstrated that 11d inhibited threonine aspartase 1 also in living tumor cells. We demonstrate for the first time that intracellular interference with independent key functions in a disease-relevant protein by an inhibitor binding to a single site is possible.
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Affiliation(s)
- Alexander Höing
- Molecular Biology II, Center of Medical Biotechnology (ZMB)/Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätsstrasse 545141 EssenGermany
| | - Robin Struth
- Organic Chemistry, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätsstrasse 745141 EssenGermany
| | - Christine Beuck
- Structural and Medicinal Biochemistry, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstrasse 545141 EssenGermany
| | - Neda Rafieiolhosseini
- Bioinformatics and Computational Biophysics, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstrasse 545141 EssenGermany
| | - Daniel Hoffmann
- Bioinformatics and Computational Biophysics, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstrasse 545141 EssenGermany
| | - Roland H. Stauber
- Molecular and Cellular Oncology/ENT, University Medical Center Mainz (UMM)Langenbeckstrasse 155101 MainzGermany
| | - Peter Bayer
- Structural and Medicinal Biochemistry, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstrasse 545141 EssenGermany
| | - Jochen Niemeyer
- Organic Chemistry, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätsstrasse 745141 EssenGermany
| | - Shirley K. Knauer
- Molecular Biology II, Center of Medical Biotechnology (ZMB)/Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätsstrasse 545141 EssenGermany
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2
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Rafieiolhosseini N, Killa M, Neumann T, Tötsch N, Grad JN, Höing A, Dirksmeyer T, Niemeyer J, Ottmann C, Knauer SK, Giese M, Voskuhl J, Hoffmann D. Computational model predicts protein binding sites of a luminescent ligand equipped with guanidiniocarbonyl-pyrrole groups. Beilstein J Org Chem 2022; 18:1322-1331. [PMID: 36225729 PMCID: PMC9520824 DOI: 10.3762/bjoc.18.137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 09/08/2022] [Indexed: 12/24/2022] Open
Abstract
The 14-3-3 protein family, one of the first discovered phosphoserine/phosphothreonine binding proteins, has attracted interest not only because of its important role in the cell regulatory processes but also due to its enormous number of interactions with other proteins. Here, we use a computational approach to predict the binding sites of the designed hybrid compound featuring aggregation-induced emission luminophores as a potential supramolecular ligand for 14-3-3ζ in the presence and absence of C-Raf peptides. Our results suggest that the area above and below the central pore of the dimeric 14-3-3ζ protein is the most probable binding site for the ligand. Moreover, we predict that the position of the ligand is sensitive to the presence of phosphorylated C-Raf peptides. With a series of experiments, we confirmed the computational prediction of two C2 related, dominating binding sites on 14-3-3ζ that may bind to two of the supramolecular ligand molecules.
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Affiliation(s)
- Neda Rafieiolhosseini
- Bioinformatics and Computational Biophysics, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstraße 5, 45141 Essen, Germany
| | - Matthias Killa
- Faculty of Chemistry (Organic Chemistry) and CENIDE, University of Duisburg-Essen, Universitätsstraße 7, 45141 Essen, Germany
| | - Thorben Neumann
- Faculty of Chemistry (Organic Chemistry) and CENIDE, University of Duisburg-Essen, Universitätsstraße 7, 45141 Essen, Germany
| | - Niklas Tötsch
- Bioinformatics and Computational Biophysics, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstraße 5, 45141 Essen, Germany
| | - Jean-Noël Grad
- Institute for Computational Physics, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | - Alexander Höing
- Department of Molecular Biology II, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstraße 5, 45141 Essen, Germany
| | - Thies Dirksmeyer
- Faculty of Chemistry (Organic Chemistry) and CENIDE, University of Duisburg-Essen, Universitätsstraße 7, 45141 Essen, Germany
| | - Jochen Niemeyer
- Faculty of Chemistry (Organic Chemistry) and CENIDE, University of Duisburg-Essen, Universitätsstraße 7, 45141 Essen, Germany
| | - Christian Ottmann
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, Netherlands
| | - Shirley K Knauer
- Department of Molecular Biology II, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstraße 5, 45141 Essen, Germany
| | - Michael Giese
- Faculty of Chemistry (Organic Chemistry) and CENIDE, University of Duisburg-Essen, Universitätsstraße 7, 45141 Essen, Germany
| | - Jens Voskuhl
- Faculty of Chemistry (Organic Chemistry) and CENIDE, University of Duisburg-Essen, Universitätsstraße 7, 45141 Essen, Germany
| | - Daniel Hoffmann
- Bioinformatics and Computational Biophysics, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstraße 5, 45141 Essen, Germany
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3
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Höing A, Zimmermann A, Moews L, Killa M, Heimann M, Hensel A, Voskuhl J, Knauer SK. A Bivalent Supramolecular GCP Ligand Enables Blocking of the Taspase1/Importin α Interaction. ChemMedChem 2021; 17:e202100640. [PMID: 34623765 PMCID: PMC9298320 DOI: 10.1002/cmdc.202100640] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Indexed: 12/12/2022]
Abstract
Taspase1 is a unique protease not only pivotal for embryonic development but also implicated in leukemia as well as solid tumors. As such, it is a promising target in cancer therapy, although only a limited number of Taspase1 inhibitors lacking general applicability are currently available. Here we present a bivalent guanidiniocarbonyl‐pyrrole (GCP)‐containing supramolecular ligand that is capable of disrupting the essential interaction between Taspase1 and its cognate import receptor Importin α in a concentration‐dependent manner in vitro with an IC50 of 35 μM. Here, size of the bivalent vs the monovalent construct as well as its derivation with an aromatic cbz‐group arose as critical determinants for efficient interference of 2GC. This was also evident when we investigated the effects in different tumor cell lines, resulting in comparable EC50 values (∼40–70 μM). Of note, in higher concentrations, 2GC also interfered with Taspase1’s proteolytic activity. We thus believe to set the stage for a novel class of Taspase1 inhibitors targeting a pivotal protein‐protein interaction prerequisite for its cancer‐associated proteolytic function.
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Affiliation(s)
- Alexander Höing
- Institute for Molecular Biology II, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstrasse 5, 45117, Essen, Germany
| | - Alexander Zimmermann
- Faculty of Chemistry (Organic Chemistry) and CENIDE, University of Duisburg Essen, Universitätsstrasse 7, 45141, Essen, Germany
| | - Lisa Moews
- Institute for Molecular Biology II, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstrasse 5, 45117, Essen, Germany
| | - Matthias Killa
- Faculty of Chemistry (Organic Chemistry) and CENIDE, University of Duisburg Essen, Universitätsstrasse 7, 45141, Essen, Germany
| | - Marius Heimann
- Faculty of Chemistry (Organic Chemistry) and CENIDE, University of Duisburg Essen, Universitätsstrasse 7, 45141, Essen, Germany
| | - Astrid Hensel
- Institute for Molecular Biology II, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstrasse 5, 45117, Essen, Germany
| | - Jens Voskuhl
- Faculty of Chemistry (Organic Chemistry) and CENIDE, University of Duisburg Essen, Universitätsstrasse 7, 45141, Essen, Germany
| | - Shirley K Knauer
- Institute for Molecular Biology II, Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstrasse 5, 45117, Essen, Germany
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4
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Pasch P, Killa M, Junghans HL, Schmidt M, Schmidt S, Voskuhl J, Hartmann L. Take your Positions and Shine: Effects of Positioning Aggregation-Induced Emission Luminophores within Sequence-Defined Macromolecules. Chemistry 2021; 27:10186-10192. [PMID: 33876476 PMCID: PMC8362002 DOI: 10.1002/chem.202101086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Indexed: 12/17/2022]
Abstract
A luminophore with aggregation‐induced emission (AIE) is employed for the conjugation onto supramolecular ligands to allow for detection of ligand binding. Supramolecular ligands are based on the combination of sequence‐defined oligo(amidoamine) scaffolds and guanidiniocarbonyl‐pyrrole (GCP) as binding motif. We hypothesize that AIE properties are strongly affected by positioning of the luminophore within the ligand scaffold. Therefore, we systematically investigate the effects placing the AIE luminophore at different positions within the overall construct, for example, in the main or side chain of the olig(amidoamine). Indeed, we can show that the position within the ligand structure strongly affects AIE, both for the ligand itself as well as when applying the ligand for the detection of different biological and synthetic polyanions.
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Affiliation(s)
- Peter Pasch
- Department for Organic Chemistry and Macromolecular Chemistry, Heinrich Heine University Duesseldorf, Universitätsstraße 1, Düsseldorf, 40225, Germany
| | - Matthias Killa
- Faculty of chemistry (Organic chemistry) and CENIDE, University of Duisburg Essen, Universitätsstrasse 7, 45141, Essen, Germany
| | - Hauke Lukas Junghans
- Department for Organic Chemistry and Macromolecular Chemistry, Heinrich Heine University Duesseldorf, Universitätsstraße 1, Düsseldorf, 40225, Germany
| | - Melanie Schmidt
- Department for Organic Chemistry and Macromolecular Chemistry, Heinrich Heine University Duesseldorf, Universitätsstraße 1, Düsseldorf, 40225, Germany
| | - Stephan Schmidt
- Department for Organic Chemistry and Macromolecular Chemistry, Heinrich Heine University Duesseldorf, Universitätsstraße 1, Düsseldorf, 40225, Germany
| | - Jens Voskuhl
- Faculty of chemistry (Organic chemistry) and CENIDE, University of Duisburg Essen, Universitätsstrasse 7, 45141, Essen, Germany
| | - Laura Hartmann
- Department for Organic Chemistry and Macromolecular Chemistry, Heinrich Heine University Duesseldorf, Universitätsstraße 1, Düsseldorf, 40225, Germany
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5
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Kumar V, Holtum T, Voskuhl J, Giese M, Schrader T, Schlücker S. Prospects of ultraviolet resonance Raman spectroscopy in supramolecular chemistry on proteins. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 254:119622. [PMID: 33743304 DOI: 10.1016/j.saa.2021.119622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 06/12/2023]
Abstract
Ultraviolet resonance Raman scattering (UVRR) has been frequently used for studying peptide and protein structure and dynamics, while applications in supramolecular chemistry are quite rare. Since UVRR offers the additional advantages of chromophore selectivity and high sensitivity compared with conventional non-resonant Raman scattering, it is ideally suited for label-free probing of relatively small artificial/supramolecular ligands exhibiting electronic resonances in the UV. In this perspective article, we first summarize results of UVRR spectroscopy in supramolecular chemistry in the context of peptide/protein recognition. We focus on selected artificial ligands which were rationally designed as selective carboxylate binders (guanidiniocarbonyl pyrrole, GCP, and guanidiniocarbonyl indole, GCI) and selective lysine binder (molecular tweezer, CLR01), respectively, via a combination of non-covalent interactions involving electrostatics, hydrogen bonding, and hydrophobic effects/van der Waals forces. Current limitations of applying UVRR as a universally applicable method for label-free and site-specific probing of molecular recognition between supramolecular ligands and proteins are highlighted. We then propose solutions to overcome these limitations for transforming UVRR spectroscopy into a generic tool in supramolecular chemistry on proteins, with an emphasis on mono- and multivalent GCP- and GCI-based ligands. Finally, we outline specific cases of supramolecular ligands such as molecular tweezers where alternative approaches such as laser-based mid-IR spectroscopy are required since UVRR can intrinsically not provide the required molecular information.
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Affiliation(s)
- Vikas Kumar
- Department of Chemistry (Physical Chemistry), Center for Nanointegration Duisburg-Essen (CENIDE) and Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstrasse 5, 45141 Essen, Germany.
| | - Tim Holtum
- Department of Chemistry (Physical Chemistry), Center for Nanointegration Duisburg-Essen (CENIDE) and Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstrasse 5, 45141 Essen, Germany
| | - Jens Voskuhl
- Department of Chemistry (Organic Chemistry) and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätsstrasse 7, 45141 Essen, Germany
| | - Michael Giese
- Department of Chemistry (Organic Chemistry) and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätsstrasse 7, 45141 Essen, Germany
| | - Thomas Schrader
- Department of Chemistry (Organic Chemistry) and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätsstrasse 7, 45141 Essen, Germany
| | - Sebastian Schlücker
- Department of Chemistry (Physical Chemistry), Center for Nanointegration Duisburg-Essen (CENIDE) and Center for Medical Biotechnology (ZMB), University of Duisburg-Essen, Universitätsstrasse 5, 45141 Essen, Germany.
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6
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Pasch P, Höing A, Ueclue S, Killa M, Voskuhl J, Knauer SK, Hartmann L. PEGylated sequence-controlled macromolecules using supramolecular binding to target the Taspase1/Importin α interaction. Chem Commun (Camb) 2021; 57:3091-3094. [PMID: 33625405 DOI: 10.1039/d0cc07139k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A novel strategy to inhibit the oncologically relevant protease Taspase1 is explored by developing PEGylated macromolecular ligands presenting the supramolecular binding motif guanidiniocarbonylpyrrole (GCP). Taspase1 requires interaction of its nuclear localization signal (NLS) with import receptor Importin α. We show the synthesis and effective interference of PEGylated multivalent macromolecular ligands with Taspase1-Importin α-complex formation.
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Affiliation(s)
- Peter Pasch
- Department for Organic Chemistry and Macromolecular Chemistry, Heinrich Heine University Düsseldorf, Universitätsstraße 1, Düsseldorf 40225, Germany.
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7
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Maity D. Selected peptide-based fluorescent probes for biological applications. Beilstein J Org Chem 2020; 16:2971-2982. [PMID: 33335605 PMCID: PMC7722625 DOI: 10.3762/bjoc.16.247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 11/18/2020] [Indexed: 01/07/2023] Open
Abstract
To understand the molecular interactions, present in living organisms and their environments, chemists are trying to create novel chemical tools. In this regard, peptide-based fluorescence techniques have attracted immense interest. Synthetic peptide-based fluorescent probes are advantageous over protein-based sensors, since they are synthetically accessible, more stable, and can be easily modified in a site-specific manner for selective biological applications. Peptide receptors labeled with environmentally sensitive/FRET fluorophores have allowed direct detection/monitoring of biomolecules in aqueous media and in live cells. In this review, key peptide-based approaches for different biological applications are presented.
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Affiliation(s)
- Debabrata Maity
- Department of Chemistry, New York University, New York, NY 10003, USA
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8
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Shi R, Feng S, Park CY, Park KY, Song J, Park JP, Chun HS, Park TJ. Fluorescence detection of histamine based on specific binding bioreceptors and carbon quantum dots. Biosens Bioelectron 2020; 167:112519. [DOI: 10.1016/j.bios.2020.112519] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 08/07/2020] [Accepted: 08/13/2020] [Indexed: 02/06/2023]
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9
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Maity D, Kumar S, AlHussein R, Gremer L, Howarth M, Karpauskaite L, Hoyer W, Magzoub M, Hamilton AD. Sub-stoichiometric inhibition of IAPP aggregation: a peptidomimetic approach to anti-amyloid agents. RSC Chem Biol 2020; 1:225-232. [PMID: 34458762 PMCID: PMC8341728 DOI: 10.1039/d0cb00086h] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 08/03/2020] [Indexed: 11/21/2022] Open
Abstract
Membrane-catalysed misfolding of islet amyloid polypeptide is associated with the death of β-cells in type II diabetes (T2D). Most active compounds so far reported require high doses for inhibition of membrane bound IAPP fibrillation. Here, we describe a naphthalimide-appended oligopyridylamide-based α-helical mimetic, DM 1, for targeting membrane bound IAPP. DM 1 completely inhibits the aggregation of IAPP at doses of 0.2 equivalents. DM 1 is also effective at similarly low doses for inhibition of seed-catalyzed secondary nucleation. An NMR based study demonstrates that DM 1 modulates IAPP self-assembly by stabilizing and/or perturbing the N-terminus helix conformation. DM 1 at substoichiometric doses rescues rat insulinoma cells from IAPP-mediated cytotoxicity. Most importantly, 0.2 equivalents of DM 1 disaggregate preformed oligomers and fibrils and can reverse cytotoxicity by modulating toxic preformed oligomers and fibrils of IAPP into non-toxic conformations.
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Affiliation(s)
- Debabrata Maity
- Department of Chemistry, New York University New York New York 10003 USA
| | - Sunil Kumar
- Department of Chemistry, New York University New York New York 10003 USA
| | - Ruyof AlHussein
- Department of Chemistry, New York University New York New York 10003 USA
| | - Lothar Gremer
- Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf 40225 Düsseldorf Germany.,Institute of Complex Systems, Structural Biochemistry (ICS-6) Forschungszentrum Jülich 52425 Jülich Germany
| | - Madeline Howarth
- Biology Program, New York University Abu Dhabi P.O. Box 129188, Saadiyat Island Campus Abu Dhabi United Arab Emirates
| | - Laura Karpauskaite
- Biology Program, New York University Abu Dhabi P.O. Box 129188, Saadiyat Island Campus Abu Dhabi United Arab Emirates
| | - Wolfgang Hoyer
- Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf 40225 Düsseldorf Germany.,Institute of Complex Systems, Structural Biochemistry (ICS-6) Forschungszentrum Jülich 52425 Jülich Germany
| | - Mazin Magzoub
- Biology Program, New York University Abu Dhabi P.O. Box 129188, Saadiyat Island Campus Abu Dhabi United Arab Emirates
| | - Andrew D Hamilton
- Department of Chemistry, New York University New York New York 10003 USA
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10
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Giese M, Niemeyer J, Voskuhl J. Guanidiniocarbonyl‐Pyrroles (GCP) – 20 Years of the Schmuck Binding Motif. Chempluschem 2020; 85:985-997. [DOI: 10.1002/cplu.202000142] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/08/2020] [Indexed: 12/24/2022]
Affiliation(s)
- Michael Giese
- Faculty of Chemistry, Organic ChemistryUniversity of Duisburg-Essen Universitätsstrasse 7 45117 Essen Germany
| | - Jochen Niemeyer
- Faculty of Chemistry, Organic ChemistryUniversity of Duisburg-Essen Universitätsstrasse 7 45117 Essen Germany
| | - Jens Voskuhl
- Faculty of Chemistry, Organic ChemistryUniversity of Duisburg-Essen Universitätsstrasse 7 45117 Essen Germany
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11
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Bartsch L, Bartel M, Gigante A, Iglesias-Fernández J, Ruiz-Blanco YB, Beuck C, Briels J, Toetsch N, Bayer P, Sanchez-Garcia E, Ottmann C, Schmuck C. Multivalent Ligands with Tailor-Made Anion Binding Motif as Stabilizers of Protein-Protein Interactions. Chembiochem 2019; 20:2921-2926. [PMID: 31168888 DOI: 10.1002/cbic.201900288] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Indexed: 12/23/2022]
Abstract
Modulation of protein-protein interactions (PPIs) is essential for understanding and tuning biologically relevant processes. Although inhibitors for PPIs are widely used, the field still lacks the targeted design of stabilizers. Here, we report unnatural stabilizers based on the combination of multivalency effects and the artificial building block guanidiniocarbonylpyrrol (GCP), an arginine mimetic. Unlike other GCP-based ligands that modulate PPIs in different protein targets, only a tetrameric design shows potent activity as stabilizer of the 14-3-3ζ/C-Raf and 14-3-3ζ/Tau complexes in the low-micromolar range. This evidences the role of multivalency for achieving higher specificity in the modulation of PPIs.
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Affiliation(s)
- Lina Bartsch
- Department of Organic Chemistry, University of Duisburg-Essen, Universitätstrasse 7, 45141, Essen, Germany
| | - Maria Bartel
- Department of Biomedical Engineering, Eindhoven University of Technology, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Alba Gigante
- Department of Organic Chemistry, University of Duisburg-Essen, Universitätstrasse 7, 45141, Essen, Germany
| | | | - Yasser B Ruiz-Blanco
- Computational Biochemistry, Faculty of Biology, Center of Medical Biotechnology, University Duisburg-Essen, Universitätsstrasse 2, 45117, Essen, Germany
| | - Christine Beuck
- Structural and Medicinal Biochemistry, University of Duisburg-Essen, Universitätstrasse 1-5, 45141, Essen, Germany
| | - Jeroen Briels
- Department of Biomedical Engineering, Eindhoven University of Technology, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Niklas Toetsch
- Computational Biochemistry, Faculty of Biology, Center of Medical Biotechnology, University Duisburg-Essen, Universitätsstrasse 2, 45117, Essen, Germany
| | - Peter Bayer
- Structural and Medicinal Biochemistry, University of Duisburg-Essen, Universitätstrasse 1-5, 45141, Essen, Germany
| | - Elsa Sanchez-Garcia
- Department of Theory, Max-Planck-Institut für Kohlenforschung, 45470, Mülheim an der Ruhr, Germany.,Computational Biochemistry, Faculty of Biology, Center of Medical Biotechnology, University Duisburg-Essen, Universitätsstrasse 2, 45117, Essen, Germany
| | - Christian Ottmann
- Department of Organic Chemistry, University of Duisburg-Essen, Universitätstrasse 7, 45141, Essen, Germany.,Department of Biomedical Engineering, Eindhoven University of Technology, P. O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Carsten Schmuck
- Department of Organic Chemistry, University of Duisburg-Essen, Universitätstrasse 7, 45141, Essen, Germany
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