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Suladze, S. ; Sustay Martinez, C.* ; Rodriguez Camargo, D.C. ; Engler, J. ; Rodina, N. ; Sarkar, R. ; Zacharias, M.* ; Reif, B.

Structural insights into seeding mechanisms of hIAPP fibril formation.

J. Am. Chem. Soc. 146, 13783-13796 (2024)
DOI PMC
Creative Commons Lizenzvertrag
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
The deposition of islet amyloid polypeptide (hIAPP) fibrils is a hallmark of β-cell death in type II diabetes. In this study, we employ state-of-the-art MAS solid-state spectroscopy to investigate the previously elusive N-terminal region of hIAPP fibrils, uncovering both rigidity and heterogeneity. Comparative analysis between wild-type hIAPP and a disulfide-deficient variant (hIAPPC2S,C7S) unveils shared fibril core structures yet strikingly distinct dynamics in the N-terminus. Specifically, the variant fibrils exhibit extended β-strand conformations, facilitating surface nucleation. Moreover, our findings illuminate the pivotal roles of specific residues in modulating secondary nucleation rates. These results deepen our understanding of hIAPP fibril assembly and provide critical insights into the molecular mechanisms underpinning type II diabetes, holding promise for future therapeutic strategies.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
Schlagwörter Islet Amyloid Polypeptide; N-terminal Region; Molecular-dynamics; Nmr-spectroscopy; Software; Aggregation; Proteins; Protons; Amylin; Identification
ISSN (print) / ISBN 0002-7863
e-ISSN 1520-5126
Zeitschrift Journal of the American Chemical Society
Quellenangaben Band: 146, Heft: 20, Seiten: 13783-13796 Artikelnummer: , Supplement: ,
Verlag American Chemical Society (ACS)
Verlagsort 1155 16th St, Nw, Washington, Dc 20036 Usa
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Structural Biology (STB)
Förderungen Helmholtz-Gemeinschaft
German Research Foundation (DFG)