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Aerssens D, Miret-Casals L, Gomez D, Sousa-Neves D, Levy Y, De Vleesschouwer M, Manicardi A, Madder A. Photo-induced crosslinking uncovers an antiparallel strand orientation in heterodimeric (EIAALEK) 3/(KIAALKE) 3 and (EIAALEK) 3/(RIAALRE) 3 coiled-coil systems. Org Biomol Chem 2023. [PMID: 37394986 DOI: 10.1039/d2ob02181a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
We describe for the first time the co-existence of the parallel and antiparallel conformation of the heterodimeric E3/K3 and E3/R3 coiled-coil systems in solution. The introduction of a furanylated amino acid in the (EIAALEK)3 sequence allowed, upon photo-induced covalent crosslinking, freezing of the respective coiled-coil complexes present in solution. The occurrence of both parallel and antiparallel conformations in solution was supported by computational simulations and further confirmed by fluorescence experiments based on pyrene-pyrene stacking.
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Affiliation(s)
- D Aerssens
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, Gent 9000, Belgium.
| | - L Miret-Casals
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, Gent 9000, Belgium.
| | - D Gomez
- Department of Biology and Chemistry, New York University, New York 10003, USA
| | - D Sousa-Neves
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, Gent 9000, Belgium.
| | - Y Levy
- Department of Structural Biology, Weizmann Institute of Science, Rehovot, Israel
| | - M De Vleesschouwer
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, Gent 9000, Belgium.
| | - A Manicardi
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, Gent 9000, Belgium.
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Viale delle Scienze, 17/A, I-43124 Parma, Italy
| | - A Madder
- Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, Gent 9000, Belgium.
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