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A structure-based model for the electrostatic interaction of the N-terminus of protein tau with the fibril core of Alzheimer’s Disease filaments

View ORCID ProfileDavid R. Boyer, View ORCID ProfileDavid S. Eisenberg
doi: https://doi.org/10.1101/484279
David R. Boyer
1Department of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, and Howard Hughes Medical Institute, UCLA, Los Angeles CA 90095-1570
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David S. Eisenberg
1Department of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, and Howard Hughes Medical Institute, UCLA, Los Angeles CA 90095-1570
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Abstract

Although portions of tau protein within the microtubule binding region have been shown to form the ordered core of tau filaments, the structural details of how other regions of tau participate in filament formation are so far unknown. In an attempt to understand how the N-terminus of tau may interact with fibril core, we crystallized and determined the structure of the N-terminal segment 5RQEFEV10 of tau. Several lines of evidence have shown the importance of this segment for fibril formation. The crystal structure reveals an out-of-register Class 5 steric zipper with a wet and a dry interface. To examine the possible interaction of 5RQEFEV10 with the tau fibril core, we modeled the binding of the wet interface of the 5RQEFEV10 structure with the 313VDLSKVTSKC322 region of the Alzheimer’s Disease tau filament structures. This model is consistent with, and helps to explain previous findings on the possible interaction of these two segments, distant in sequence. In addition, we discuss the possible conservation of this interaction across multiple polymorphs of tau.

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Posted November 30, 2018.
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A structure-based model for the electrostatic interaction of the N-terminus of protein tau with the fibril core of Alzheimer’s Disease filaments
David R. Boyer, David S. Eisenberg
bioRxiv 484279; doi: https://doi.org/10.1101/484279
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A structure-based model for the electrostatic interaction of the N-terminus of protein tau with the fibril core of Alzheimer’s Disease filaments
David R. Boyer, David S. Eisenberg
bioRxiv 484279; doi: https://doi.org/10.1101/484279

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