8azu

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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[8azu]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8AZU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8AZU FirstGlance]. <br>
<table><tr><td colspan='2'>[[8azu]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8AZU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8AZU FirstGlance]. <br>
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</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8azu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8azu OCA], [https://pdbe.org/8azu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8azu RCSB], [https://www.ebi.ac.uk/pdbsum/8azu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8azu ProSAT]</span></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.1&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8azu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8azu OCA], [https://pdbe.org/8azu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8azu RCSB], [https://www.ebi.ac.uk/pdbsum/8azu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8azu ProSAT]</span></td></tr>
</table>
</table>
== Disease ==
== Disease ==
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Soluble oligomers of amyloid beta-protein (Abeta) have been defined as aggregates in supernatants following ultracentrifugation of aqueous extracts from Alzheimer's disease (AD) brains and are believed to be upstream initiators of synaptic dysfunction, but little is known about their structures. We now report the unexpected presence of Abeta fibrils in synaptotoxic high-speed supernatants from AD brains extracted by soaking in an aqueous buffer. The fibrils did not appear to form during preparation, and their counts by EM correlated with Abeta ELISA quantification. Cryo-EM structures of aqueous Abeta fibrils were identical to those from sarkosyl-insoluble homogenates. The fibrils in aqueous extracts were labeled by lecanemab, an Abeta aggregate-directed antibody reported to improve AD cognitive outcomes. Lecanemab provided protection against aqueous fibril synaptotoxicity. We conclude that fibrils are abundant in aqueous extracts from AD brains and have the same structures as those from plaques. These findings have implications for AD pathogenesis and drug design.
Soluble oligomers of amyloid beta-protein (Abeta) have been defined as aggregates in supernatants following ultracentrifugation of aqueous extracts from Alzheimer's disease (AD) brains and are believed to be upstream initiators of synaptic dysfunction, but little is known about their structures. We now report the unexpected presence of Abeta fibrils in synaptotoxic high-speed supernatants from AD brains extracted by soaking in an aqueous buffer. The fibrils did not appear to form during preparation, and their counts by EM correlated with Abeta ELISA quantification. Cryo-EM structures of aqueous Abeta fibrils were identical to those from sarkosyl-insoluble homogenates. The fibrils in aqueous extracts were labeled by lecanemab, an Abeta aggregate-directed antibody reported to improve AD cognitive outcomes. Lecanemab provided protection against aqueous fibril synaptotoxicity. We conclude that fibrils are abundant in aqueous extracts from AD brains and have the same structures as those from plaques. These findings have implications for AD pathogenesis and drug design.
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Abundant Abeta fibrils in ultracentrifugal supernatants of aqueous extracts from Alzheimer's disease brains.,Stern AM, Yang Y, Jin S, Yamashita K, Meunier AL, Liu W, Cai Y, Ericsson M, Liu L, Goedert M, Scheres SHW, Selkoe DJ Neuron. 2023 May 2:S0896-6273(23)00269-6. doi: 10.1016/j.neuron.2023.04.007. PMID:37167969<ref>PMID:37167969</ref>
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Abundant Abeta fibrils in ultracentrifugal supernatants of aqueous extracts from Alzheimer's disease brains.,Stern AM, Yang Y, Jin S, Yamashita K, Meunier AL, Liu W, Cai Y, Ericsson M, Liu L, Goedert M, Scheres SHW, Selkoe DJ Neuron. 2023 Jul 5;111(13):2012-2020.e4. doi: 10.1016/j.neuron.2023.04.007. Epub , 2023 May 10. PMID:37167969<ref>PMID:37167969</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
</div>
<div class="pdbe-citations 8azu" style="background-color:#fffaf0;"></div>
<div class="pdbe-citations 8azu" style="background-color:#fffaf0;"></div>
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==See Also==
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*[[Microtubule-associated protein 3D structures|Microtubule-associated protein 3D structures]]
== References ==
== References ==
<references/>
<references/>

Current revision

Paired helical tau filaments from high-spin supernatants of aqueous extracts from Alzheimer's disease brains | PHF Tau

PDB ID 8azu

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