Repository: Freie Universität Berlin, Math Department

The Impact of Halogenated Phenylalanine Derivatives on NFGAIL Amyloid Formation

Chowdhary, Suvrat and Moschner, Johann and Mikolajczak, Dorian J. and Becker, Maximilian and Thünemann, Andreas F. and Kästner, Claudia and Klemczak, Damian and Stegemann, Anne-Katrin and Böttcher, Christoph and Metrangolo, Pierangelo and Netz, Roland R. and Koksch, Beate (2020) The Impact of Halogenated Phenylalanine Derivatives on NFGAIL Amyloid Formation. ChemBioChem, 21 . pp. 3544-3554.

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The hexapeptide hIAPP22–27 (NFGAIL) is known as a crucial amyloid core sequence of the human islet amyloid polypeptide (hIAPP) whose aggregates can be used to better understand the wild-type hIAPP’s toxicity to β-cell death. In amyloid research, the role of hydrophobic and aromatic-aromatic interactions as potential driving forces during the aggregation process is controversially discussed not only in case of NFGAIL, but also for amyloidogenic peptides in general. We have used halogenation of the aromatic residue as a strategy to modulate hydrophobic and aromatic-aromatic interactions and prepared a library of NFGAIL variants containing fluorinated and iodinated phenylalanine analogues. We used thioflavin T staining, transmission electron microscopy (TEM) and smallangle X-ray scattering (SAXS) to study the impact of side-chain halogenation on NFGAIL amyloid formation kinetics. Our data revealed a synergy between aggregation behavior and hydrophobicity of the phenylalanine residue. This study introduces systematic fluorination as a toolbox to further investigate the nature of the amyloid self-assembly process.

Item Type:Article
Subjects:Mathematical and Computer Sciences > Mathematics > Applied Mathematics
Divisions:Department of Mathematics and Computer Science > Institute of Mathematics
ID Code:2616
Deposited By: Monika Drueck
Deposited On:24 Sep 2021 11:46
Last Modified:24 Sep 2021 11:46

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