Polyphosphate initiates tau aggregation through intra- and intermolecular scaffolding
Polyphosphate initiates tau aggregation through intra- and intermolecular scaffolding
复制标题
聚磷酸盐通过分子内和分子间支架引发 tau 聚集
DOI:
10.1101/588509
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Elizabeth Rhoades
中科院分区:
文献类型:
--
作者:
S. Wickramasinghe;Justine Lempart;Hope E. Merens;Jacob Murphy;Philipp Huettemann;Ursula Jakob;Elizabeth Rhoades
The aggregation and deposition of tau is a hallmark of a class of neurodegenerative diseases called tauopathies. Despite intensive study, cellular and molecular factors that trigger tau aggregation are not well understood. Here we provide evidence for two mechanisms relevant to the initiation of tau aggregation in the presence of cytoplasmic polyphosphates (polyP): changes in the conformational ensemble of monomer tau and noncovalent cross-linking of multiple tau monomers. We identified conformational changes throughout full-length tau, most notably diminishment of long-range interactions between the termini coupled with compaction of the microtubule binding and proline rich regions. We found that while the proline rich and microtubule binding regions both contain polyP binding sites, the proline rich region is a requisite for compaction of the microtubule binding region upon binding. Additionally, both the magnitude of the conformational change and the aggregation of tau are dependent on the chain length of the polyP polymer. Longer polyP chains are more effective at intermolecular, noncovalent cross-linking of tau. These observations provide an understanding of the initial steps of tau aggregation through interaction with a physiologically relevant aggregation inducer.
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影响因子:
--
作者:
Melo,AnaM;Elbaum-Garfinkle,Shana;Rhoades,Elizabeth
通讯作者:
Rhoades,Elizabeth
影响因子:
2.9
作者:
Chirita, CN;Congdon, EE;Kuret, J
通讯作者:
Kuret, J
影响因子:
5.7
作者:
M. Schwalbe;V. Ozenne;Stefan Bibow;Mariusz Jaremko;L. Jaremko;M. Gajda;M. R. Jensen;J. Biernat;S. Becker;E. Mandelkow;M. Zweckstetter;M. Blackledge
通讯作者:
M. Schwalbe;V. Ozenne;Stefan Bibow;Mariusz Jaremko;L. Jaremko;M. Gajda;M. R. Jensen;J. Biernat;S. Becker;E. Mandelkow;M. Zweckstetter;M. Blackledge
影响因子:
16
作者:
Cremers CM;Knoefler D;Gates S;Martin N;Dahl JU;Lempart J;Xie L;Chapman MR;Galvan V;Southworth DR;Jakob U
通讯作者:
Jakob U
影响因子:
15
作者:
Elbaum-Garfinkle, Shana;Rhoades, Elizabeth
通讯作者:
Rhoades, Elizabeth