1
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Akbarzadeh M, Flegel J, Patil S, Shang E, Narayan R, Buchholzer M, Kazemein Jasemi NS, Grigalunas M, Krzyzanowski A, Abegg D, Shuster A, Potowski M, Karatas H, Karageorgis G, Mosaddeghzadeh N, Zischinsky M, Merten C, Golz C, Brieger L, Strohmann C, Antonchick AP, Janning P, Adibekian A, Goody RS, Ahmadian MR, Ziegler S, Waldmann H. The Pseudo-Natural Product Rhonin Targets RHOGDI. Angew Chem Int Ed Engl 2022; 61:e202115193. [PMID: 35170181 PMCID: PMC9313812 DOI: 10.1002/anie.202115193] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Indexed: 11/18/2022]
Abstract
For the discovery of novel chemical matter generally endowed with bioactivity, strategies may be particularly efficient that combine previous insight about biological relevance, e.g., natural product (NP) structure, with methods that enable efficient coverage of chemical space, such as fragment-based design. We describe the de novo combination of different 5-membered NP-derived N-heteroatom fragments to structurally unprecedented "pseudo-natural products" in an efficient complexity-generating and enantioselective one-pot synthesis sequence. The pseudo-NPs inherit characteristic elements of NP structure but occupy areas of chemical space not covered by NP-derived chemotypes, and may have novel biological targets. Investigation of the pseudo-NPs in unbiased phenotypic assays and target identification led to the discovery of the first small-molecule ligand of the RHO GDP-dissociation inhibitor 1 (RHOGDI1), termed Rhonin. Rhonin inhibits the binding of the RHOGDI1 chaperone to GDP-bound RHO GTPases and alters the subcellular localization of RHO GTPases.
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Affiliation(s)
- Mohammad Akbarzadeh
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
- Institute of Biochemistry and Molecular Biology IIMedical Faculty and University Hospital DüsseldorfHeinrich Heine University DüsseldorfUniversitätsstrasse 1, Building 22.03.0540225DüsseldorfGermany
| | - Jana Flegel
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
| | - Sumersing Patil
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
| | - Erchang Shang
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
| | - Rishikesh Narayan
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
- School of Chemical and Materials SciencesIIT Goa, FarmagudiPondaGoa-403401India
| | - Marcel Buchholzer
- Institute of Biochemistry and Molecular Biology IIMedical Faculty and University Hospital DüsseldorfHeinrich Heine University DüsseldorfUniversitätsstrasse 1, Building 22.03.0540225DüsseldorfGermany
| | - Neda S. Kazemein Jasemi
- Institute of Biochemistry and Molecular Biology IIMedical Faculty and University Hospital DüsseldorfHeinrich Heine University DüsseldorfUniversitätsstrasse 1, Building 22.03.0540225DüsseldorfGermany
| | - Michael Grigalunas
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
| | - Adrian Krzyzanowski
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
- Faculty of Chemistry and Chemical BiologyTechnical University DortmundOtto-Hahn-Straße 644221DortmundGermany
| | - Daniel Abegg
- Department of ChemistryThe Scripps Research Institute130 Scripps WayJupiterFL 33458USA
| | - Anton Shuster
- Department of ChemistryThe Scripps Research Institute130 Scripps WayJupiterFL 33458USA
| | - Marco Potowski
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
| | - Hacer Karatas
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
| | - George Karageorgis
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
| | - Niloufar Mosaddeghzadeh
- Institute of Biochemistry and Molecular Biology IIMedical Faculty and University Hospital DüsseldorfHeinrich Heine University DüsseldorfUniversitätsstrasse 1, Building 22.03.0540225DüsseldorfGermany
| | | | - Christian Merten
- Faculty of Chemistry and BiochemistryOrganic Chemistry IIRuhr-University BochumUniversitätsstrasse 15044780BochumGermany
| | - Christopher Golz
- Faculty of Chemistry and Chemical BiologyTechnical University DortmundOtto-Hahn-Straße 644221DortmundGermany
| | - Lucas Brieger
- Faculty of Chemistry and Chemical BiologyTechnical University DortmundOtto-Hahn-Straße 644221DortmundGermany
| | - Carsten Strohmann
- Faculty of Chemistry and Chemical BiologyTechnical University DortmundOtto-Hahn-Straße 644221DortmundGermany
| | - Andrey P. Antonchick
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
| | - Petra Janning
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
| | - Alexander Adibekian
- Department of ChemistryThe Scripps Research Institute130 Scripps WayJupiterFL 33458USA
| | - Roger S. Goody
- Max Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
| | - Mohammad Reza Ahmadian
- Institute of Biochemistry and Molecular Biology IIMedical Faculty and University Hospital DüsseldorfHeinrich Heine University DüsseldorfUniversitätsstrasse 1, Building 22.03.0540225DüsseldorfGermany
| | - Slava Ziegler
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
| | - Herbert Waldmann
- Department of Chemical BiologyMax Planck Institute of Molecular PhysiologyOtto-Hahn-Straße 1144227DortmundGermany
- Faculty of Chemistry and Chemical BiologyTechnical University DortmundOtto-Hahn-Straße 644221DortmundGermany
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2
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Akbarzadeh M, Flegel J, Patil S, Shang E, Narayan R, Buchholzer M, Kazemein Jasemi NS, Grigalunas M, Krzyzanowski A, Abegg D, Shuster A, Potowski M, Karatas H, Karageorgis G, Mosaddeghzadeh N, Zischinsky M, Merten C, Golz C, Brieger L, Strohmann C, Antonchick AP, Janning P, Adibekian A, Goody RS, Ahmadian MR, Ziegler S, Waldmann H. The Pseudo‐Natural Product Rhonin Targets RHOGDI. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115193] [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)
- Mohammad Akbarzadeh
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
- Institute of Biochemistry and Molecular Biology II Medical Faculty and University Hospital Düsseldorf Heinrich Heine University Düsseldorf Universitätsstrasse 1, Building 22.03.05 40225 Düsseldorf Germany
| | - Jana Flegel
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Sumersing Patil
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Erchang Shang
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Rishikesh Narayan
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
- School of Chemical and Materials Sciences IIT Goa, Farmagudi Ponda Goa-403401 India
| | - Marcel Buchholzer
- Institute of Biochemistry and Molecular Biology II Medical Faculty and University Hospital Düsseldorf Heinrich Heine University Düsseldorf Universitätsstrasse 1, Building 22.03.05 40225 Düsseldorf Germany
| | - Neda S. Kazemein Jasemi
- Institute of Biochemistry and Molecular Biology II Medical Faculty and University Hospital Düsseldorf Heinrich Heine University Düsseldorf Universitätsstrasse 1, Building 22.03.05 40225 Düsseldorf Germany
| | - Michael Grigalunas
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Adrian Krzyzanowski
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
- Faculty of Chemistry and Chemical Biology Technical University Dortmund Otto-Hahn-Straße 6 44221 Dortmund Germany
| | - Daniel Abegg
- Department of Chemistry The Scripps Research Institute 130 Scripps Way Jupiter FL 33458 USA
| | - Anton Shuster
- Department of Chemistry The Scripps Research Institute 130 Scripps Way Jupiter FL 33458 USA
| | - Marco Potowski
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Hacer Karatas
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - George Karageorgis
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Niloufar Mosaddeghzadeh
- Institute of Biochemistry and Molecular Biology II Medical Faculty and University Hospital Düsseldorf Heinrich Heine University Düsseldorf Universitätsstrasse 1, Building 22.03.05 40225 Düsseldorf Germany
| | | | - Christian Merten
- Faculty of Chemistry and Biochemistry Organic Chemistry II Ruhr-University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Christopher Golz
- Faculty of Chemistry and Chemical Biology Technical University Dortmund Otto-Hahn-Straße 6 44221 Dortmund Germany
| | - Lucas Brieger
- Faculty of Chemistry and Chemical Biology Technical University Dortmund Otto-Hahn-Straße 6 44221 Dortmund Germany
| | - Carsten Strohmann
- Faculty of Chemistry and Chemical Biology Technical University Dortmund Otto-Hahn-Straße 6 44221 Dortmund Germany
| | - Andrey P. Antonchick
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Petra Janning
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Alexander Adibekian
- Department of Chemistry The Scripps Research Institute 130 Scripps Way Jupiter FL 33458 USA
| | - Roger S. Goody
- Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Mohammad Reza Ahmadian
- Institute of Biochemistry and Molecular Biology II Medical Faculty and University Hospital Düsseldorf Heinrich Heine University Düsseldorf Universitätsstrasse 1, Building 22.03.05 40225 Düsseldorf Germany
| | - Slava Ziegler
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
| | - Herbert Waldmann
- Department of Chemical Biology Max Planck Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
- Faculty of Chemistry and Chemical Biology Technical University Dortmund Otto-Hahn-Straße 6 44221 Dortmund Germany
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3
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Agnew-Francis KA, Williams CM. Squaramides as Bioisosteres in Contemporary Drug Design. Chem Rev 2020; 120:11616-11650. [DOI: 10.1021/acs.chemrev.0c00416] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Kylie A. Agnew-Francis
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
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4
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Siddiqui F, Alam C, Rosenqvist P, Ora M, Sabt A, Manoharan GB, Bindu L, Okutachi S, Catillon M, Taylor T, Abdelhafez OM, Lönnberg H, Stephen AG, Papageorgiou AC, Virta P, Abankwa D. PDE6D Inhibitors with a New Design Principle Selectively Block K-Ras Activity. ACS OMEGA 2020; 5:832-842. [PMID: 31956834 PMCID: PMC6964506 DOI: 10.1021/acsomega.9b03639] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 12/09/2019] [Indexed: 05/12/2023]
Abstract
The trafficking chaperone PDE6D (also referred to as PDEδ) has been nominated as a surrogate target for K-Ras4B (hereafter K-Ras). Arl2-assisted unloading of K-Ras from PDE6D in the perinuclear area is significant for correct K-Ras localization and therefore activity. However, the unloading mechanism also leads to the undesired ejection of PDE6D inhibitors. To counteract ejection, others have recently optimized inhibitors for picomolar affinities; however, cell penetration generally seems to remain an issue. To increase resilience against ejection, we engineered a "chemical spring" into prenyl-binding pocket inhibitors of PDE6D. Furthermore, cell penetration was improved by attaching a cell-penetration group, allowing us to arrive at micromolar in cellulo potencies in the first generation. Our model compounds, Deltaflexin-1 and -2, selectively disrupt K-Ras, but not H-Ras membrane organization. This selectivity profile is reflected in the antiproliferative activity on colorectal and breast cancer cells, as well as the ability to block stemness traits of lung and breast cancer cells. While our current model compounds still have a low in vitro potency, we expect that our modular and simple inhibitor redesign could significantly advance the development of pharmacologically more potent compounds against PDE6D and related targets, such as UNC119 in the future.
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Affiliation(s)
- Farid
A. Siddiqui
- Turku
Bioscience Centre, University of Turku and
Åbo Akademi University, 20520 Turku, Finland
| | - Catharina Alam
- Turku
Bioscience Centre, University of Turku and
Åbo Akademi University, 20520 Turku, Finland
| | - Petja Rosenqvist
- Department
of Chemistry, University of Turku, 20014 Turku, Finland
| | - Mikko Ora
- Department
of Chemistry, University of Turku, 20014 Turku, Finland
| | - Ahmed Sabt
- Department
of Chemistry, University of Turku, 20014 Turku, Finland
- Chemistry
of Natural Compounds Department, National
Research Centre, Dokki, 12622 Giza, Egypt
| | - Ganesh babu Manoharan
- Cancer
Cell Biology and Drug Discovery Group, Life Sciences Research Unit, University of Luxembourg, 4362 Esch-sur-Alzette, Luxembourg
| | - Lakshman Bindu
- NCI
RAS Initiative, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, 21702 Frederick, Maryland, United States
| | - Sunday Okutachi
- Cancer
Cell Biology and Drug Discovery Group, Life Sciences Research Unit, University of Luxembourg, 4362 Esch-sur-Alzette, Luxembourg
| | - Marie Catillon
- Cancer
Cell Biology and Drug Discovery Group, Life Sciences Research Unit, University of Luxembourg, 4362 Esch-sur-Alzette, Luxembourg
| | - Troy Taylor
- NCI
RAS Initiative, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, 21702 Frederick, Maryland, United States
| | - Omaima M. Abdelhafez
- Chemistry
of Natural Compounds Department, National
Research Centre, Dokki, 12622 Giza, Egypt
| | - Harri Lönnberg
- Department
of Chemistry, University of Turku, 20014 Turku, Finland
| | - Andrew G. Stephen
- NCI
RAS Initiative, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, 21702 Frederick, Maryland, United States
| | | | - Pasi Virta
- Department
of Chemistry, University of Turku, 20014 Turku, Finland
| | - Daniel Abankwa
- Turku
Bioscience Centre, University of Turku and
Åbo Akademi University, 20520 Turku, Finland
- Cancer
Cell Biology and Drug Discovery Group, Life Sciences Research Unit, University of Luxembourg, 4362 Esch-sur-Alzette, Luxembourg
- E-mail:
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5
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Cromm PM, Adihou H, Kapoor S, Vazquez-Chantada M, Davey P, Longmire D, Hennes E, Hofer W, Küchler P, Chiarparin E, Waldmann H, Grossmann TN. Lipidated Stapled Peptides Targeting the Acyl Binding Protein UNC119. Chembiochem 2019; 20:2987-2990. [PMID: 31680402 PMCID: PMC6973269 DOI: 10.1002/cbic.201900615] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Indexed: 01/09/2023]
Abstract
The acyl-binding UNC119 proteins mediate the activation and transport of various N-myristoylated proteins. In particular, UNC119a plays a crucial role in the completion of cytokinesis. Herein, we report the use of a lipidated peptide originating from the UNC119 binding partner Gnat1 as the basis for the design of lipidated, stabilized α-helical peptides that target UNC119a. By using the hydrocarbon peptide-stapling approach, cell-permeable binders of UNC119a were generated that induced the accumulation of cytokinetic and binucleated cells; this suggests UNC119a as a potential target for the inhibition of cytokinesis.
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Affiliation(s)
- Philipp M Cromm
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227, Dortmund, Germany.,Technische Universität Dortmund, Fakultät für Chemie und Chemische Biologie, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany.,Present address: Research and Development, Pharmaceuticals, Bayer AG, Muellerstrasse 178, 13353, Berlin, Germany
| | - Hélène Adihou
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227, Dortmund, Germany.,Early CVRM Medicinal Chemistry, R&D BioPharmaceuticals, AstraZeneca, Pepparedsleden 1, 431 83, Mölndal, Sweden
| | - Shobhna Kapoor
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227, Dortmund, Germany
| | - Mercedes Vazquez-Chantada
- Chemistry, Oncology R&D, AstraZeneca, Darwin Building 310, Cambridge Science Park, Milton Road, Cambridge, CB4 0WG, UK
| | - Paul Davey
- Chemistry, Oncology R&D, AstraZeneca, Darwin Building 310, Cambridge Science Park, Milton Road, Cambridge, CB4 0WG, UK
| | - David Longmire
- Chemistry, Oncology R&D, AstraZeneca, Darwin Building 310, Cambridge Science Park, Milton Road, Cambridge, CB4 0WG, UK
| | - Elisabeth Hennes
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227, Dortmund, Germany
| | - Walter Hofer
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227, Dortmund, Germany
| | - Philipp Küchler
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227, Dortmund, Germany
| | - Elisabetta Chiarparin
- Chemistry, Oncology R&D, AstraZeneca, Darwin Building 310, Cambridge Science Park, Milton Road, Cambridge, CB4 0WG, UK
| | - Herbert Waldmann
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227, Dortmund, Germany.,Technische Universität Dortmund, Fakultät für Chemie und Chemische Biologie, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
| | - Tom N Grossmann
- Vrije Universiteit Amsterdam, Department of Chemistry and Pharmaceutical Sciences, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
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6
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Kaiser N, Mejuch T, Fedoryshchak R, Janning P, Tate EW, Waldmann H. Photoactivatable Myristic Acid Probes for UNC119-Cargo Interactions. Chembiochem 2018; 20:134-139. [DOI: 10.1002/cbic.201800406] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Indexed: 01/01/2023]
Affiliation(s)
- Nadine Kaiser
- Department of Chemical Biology; Max-Planck-Institute of, Molecular Physiology; Otto-Hahn-Strasse 11 44227 Dortmund Germany
- Faculty of Chemistry and Chemical Biology; TU Dortmund University; Otto-Hahn-Strasse 6 44227 Dortmund Germany
| | - Tom Mejuch
- Department of Chemical Biology; Max-Planck-Institute of, Molecular Physiology; Otto-Hahn-Strasse 11 44227 Dortmund Germany
- Faculty of Chemistry and Chemical Biology; TU Dortmund University; Otto-Hahn-Strasse 6 44227 Dortmund Germany
| | - Roman Fedoryshchak
- Department of Chemistry; Imperial College London; Exhibition Road London SW7 2AZ UK
| | - Petra Janning
- Department of Chemical Biology; Max-Planck-Institute of, Molecular Physiology; Otto-Hahn-Strasse 11 44227 Dortmund Germany
| | - Edward W. Tate
- Department of Chemistry; Imperial College London; Exhibition Road London SW7 2AZ UK
| | - Herbert Waldmann
- Department of Chemical Biology; Max-Planck-Institute of, Molecular Physiology; Otto-Hahn-Strasse 11 44227 Dortmund Germany
- Faculty of Chemistry and Chemical Biology; TU Dortmund University; Otto-Hahn-Strasse 6 44227 Dortmund Germany
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7
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Erwin N, Dwivedi M, Mejuch T, Waldmann H, Winter R. UNC119A Decreases the Membrane Binding of Myristoylated c-Src. Chembiochem 2018; 19:1482-1487. [PMID: 29700916 DOI: 10.1002/cbic.201800158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Indexed: 12/26/2022]
Abstract
Plasma membrane localization of myristoylated c-Src, a proto-oncogene protein-tyrosine kinase, is required for its signaling activity. Recent studies proposed that UNC119 protein functions as a solubilizing factor for myristoylated proteins, thereby regulating their subcellular distribution and signaling. The underlying molecular mechanism by which UNC119 regulates the membrane binding of c-Src has remained elusive. By combining different biophysical techniques, we have found that binding of a myristoylated c-Src-derived N-terminal peptide (Myr-Src) by UNC119A results in a reduced membrane binding affinity of the peptide, due to the competition of binding to membranes. The dissociation of Myr-Src from membranes is facilitated in the presence of UNC119A, as a consequence of which the clustering propensity of this peptide on the membrane is partially impaired. By these means, UNC119A is able to regulate c-Src spatially in the cytoplasm and on cellular membranes, and this has important implications for its cellular signaling.
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Affiliation(s)
- Nelli Erwin
- Physical Chemistry I, Biophysical Chemistry, Faculty of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Strasse 4a, 44227, Dortmund, Germany
| | - Mridula Dwivedi
- Physical Chemistry I, Biophysical Chemistry, Faculty of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Strasse 4a, 44227, Dortmund, Germany
| | - Tom Mejuch
- Department of Chemical Biology, Max-Plank-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227, Dortmund, Germany
| | - Herbert Waldmann
- Department of Chemical Biology, Max-Plank-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227, Dortmund, Germany
| | - Roland Winter
- Physical Chemistry I, Biophysical Chemistry, Faculty of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn-Strasse 4a, 44227, Dortmund, Germany
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