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Title (Primary) Assembly of τ protein into Alzheimer paired helical filaments depends on a local sequence motif (306VQIVYK311) forming β structure
Author von Bergen, M.; Friedhoff, P.; Biernat, J.; Heberle, J.; Mandelkow, E.-M.; Mandelkow, E.;
Journal Proceedings of the National Academy of Sciences of the United States of America : PNAS
Year 2000
Department PROTEOM;
Volume 97
Issue 10
Language englisch;
Abstract We have searched for a minimal interaction motif in tau protein that supports the aggregation into Alzheimer-like paired helical filaments. Digestion of the repeat domain with different proteases yields a GluC-induced fragment comprising 43 residues (termed PHF43), which represents the third repeat of tau plus some flanking residues. This fragment self assembles readily into thin filaments without a paired helical appearance, but these filaments are highly competent to nucleate bona fide PHFs from full-length tau. Probing the interactions of PHF43 with overlapping peptides derived from the full tau sequence yields a minimal hexapeptide interaction motif of (306)VQIVYK(311) at the beginning of the third internal repeat. This motif coincides with the highest predicted beta-structure potential in tau. CD and Fourier transform infrared spectroscopy shows that PHF43 acquires pronounced beta structure in conditions of self assembly. Point mutations in the hexapeptide region by proline-scanning mutagenesis prevent the aggregation. The data indicate that PHF assembly is initiated by a short fragment containing the minimal interaction motif forming a local beta structure embedded in a largely random-coil protein.
ID 7733
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=7733
von Bergen, M., Friedhoff, P., Biernat, J., Heberle, J., Mandelkow, E.-M., Mandelkow, E. (2000):
Assembly of τ protein into Alzheimer paired helical filaments depends on a local sequence motif (306VQIVYK311) forming β structure
Proc. Natl. Acad. Sci. U.S.A. 97 (10), 5129 - 5134