8r3t

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m (Protected "8r3t" [edit=sysop:move=sysop])
Current revision (08:05, 6 December 2023) (edit) (undo)
 
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'''Unreleased structure'''
 
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The entry 8r3t is ON HOLD
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==Cofactor-free Tau 4R2N isoform==
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<StructureSection load='8r3t' size='340' side='right'caption='[[8r3t]], [[Resolution|resolution]] 3.10&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[8r3t]] is a 6 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=8R3T OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8R3T FirstGlance]. <br>
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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=8r3t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8r3t OCA], [https://pdbe.org/8r3t PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8r3t RCSB], [https://www.ebi.ac.uk/pdbsum/8r3t PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8r3t ProSAT]</span></td></tr>
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</table>
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== Disease ==
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[https://www.uniprot.org/uniprot/TAU_HUMAN TAU_HUMAN] Note=In Alzheimer disease, the neuronal cytoskeleton in the brain is progressively disrupted and replaced by tangles of paired helical filaments (PHF) and straight filaments, mainly composed of hyperphosphorylated forms of TAU (PHF-TAU or AD P-TAU). O-GlcNAcylation is greatly reduced in Alzheimer disease brain cerebral cortex leading to an increase in TAU/MAPT phosphorylations.<ref>PMID:19451179</ref> <ref>PMID:2484340</ref> <ref>PMID:14517953</ref> Defects in MAPT are a cause of frontotemporal dementia (FTD) [MIM:[https://omim.org/entry/600274 600274]; also called frontotemporal dementia (FTD), pallido-ponto-nigral degeneration (PPND) or historically termed Pick complex. This form of frontotemporal dementia is characterized by presenile dementia with behavioral changes, deterioration of cognitive capacities and loss of memory. In some cases, parkinsonian symptoms are prominent. Neuropathological changes include frontotemporal atrophy often associated with atrophy of the basal ganglia, substantia nigra, amygdala. In most cases, protein tau deposits are found in glial cells and/or neurons.<ref>PMID:19451179</ref> <ref>PMID:2484340</ref> <ref>PMID:14517953</ref> <ref>PMID:9629852</ref> <ref>PMID:9736786</ref> <ref>PMID:9641683</ref> <ref>PMID:9789048</ref> <ref>PMID:9973279</ref> <ref>PMID:10553987</ref> <ref>PMID:10214944</ref> <ref>PMID:10374757</ref> <ref>PMID:10489057</ref> <ref>PMID:10208578</ref> <ref>PMID:11117541</ref> <ref>PMID:10802785</ref> <ref>PMID:11071507</ref> <ref>PMID:11585254</ref> <ref>PMID:11278002</ref> <ref>PMID:12473774</ref> <ref>PMID:11921059</ref> <ref>PMID:11906000</ref> <ref>PMID:11889249</ref> <ref>PMID:12509859</ref> <ref>PMID:16240366</ref> <ref>PMID:15883319</ref> Defects in MAPT are a cause of Pick disease of the brain (PIDB) [MIM:[https://omim.org/entry/172700 172700]. It is a rare form of dementia pathologically defined by severe atrophy, neuronal loss and gliosis. It is characterized by the occurrence of tau-positive inclusions, swollen neurons (Pick cells) and argentophilic neuronal inclusions known as Pick bodies that disproportionally affect the frontal and temporal cortical regions. Clinical features include aphasia, apraxia, confusion, anomia, memory loss and personality deterioration.<ref>PMID:19451179</ref> <ref>PMID:2484340</ref> <ref>PMID:14517953</ref> <ref>PMID:10604746</ref> <ref>PMID:11117542</ref> <ref>PMID:11089577</ref> <ref>PMID:11601501</ref> <ref>PMID:11891833</ref> Note=Defects in MAPT are a cause of corticobasal degeneration (CBD). It is marked by extrapyramidal signs and apraxia and can be associated with memory loss. Neuropathologic features may overlap Alzheimer disease, progressive supranuclear palsy, and Parkinson disease.<ref>PMID:19451179</ref> <ref>PMID:2484340</ref> <ref>PMID:14517953</ref> Defects in MAPT are a cause of progressive supranuclear palsy type 1 (PSNP1) [MIM:[https://omim.org/entry/601104 601104]; also abbreviated as PSP and also known as Steele-Richardson-Olszewski syndrome. PSNP1 is characterized by akinetic-rigid syndrome, supranuclear gaze palsy, pyramidal tract dysfunction, pseudobulbar signs and cognitive capacities deterioration. Neurofibrillary tangles and gliosis but no amyloid plaques are found in diseased brains. Most cases appear to be sporadic, with a significant association with a common haplotype including the MAPT gene and the flanking regions. Familial cases show an autosomal dominant pattern of transmission with incomplete penetrance; genetic analysis of a few cases showed the occurrence of tau mutations, including a deletion of Asn-613.<ref>PMID:19451179</ref> <ref>PMID:2484340</ref> <ref>PMID:14517953</ref> <ref>PMID:10534245</ref> <ref>PMID:11220749</ref> <ref>PMID:12325083</ref> <ref>PMID:14991829</ref> <ref>PMID:14991828</ref> <ref>PMID:16157753</ref> Defects in MAPT are a cause of Parkinson-dementia syndrome (PARDE) [MIM:[https://omim.org/entry/260540 260540]. A syndrome characterized by parkinsonism tremor, rigidity, dementia, ophthalmoparesis and pyramidal signs. Neurofibrillary degeneration occurs in the hippocampus, basal ganglia and brainstem nuclei.<ref>PMID:19451179</ref> <ref>PMID:2484340</ref> <ref>PMID:14517953</ref>
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== Function ==
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[https://www.uniprot.org/uniprot/TAU_HUMAN TAU_HUMAN] Promotes microtubule assembly and stability, and might be involved in the establishment and maintenance of neuronal polarity. The C-terminus binds axonal microtubules while the N-terminus binds neural plasma membrane components, suggesting that tau functions as a linker protein between both. Axonal polarity is predetermined by TAU/MAPT localization (in the neuronal cell) in the domain of the cell body defined by the centrosome. The short isoforms allow plasticity of the cytoskeleton whereas the longer isoforms may preferentially play a role in its stabilization.<ref>PMID:21985311</ref>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Tau protein fibrillization is implicated in the pathogenesis of several neurodegenerative diseases collectively known as Tauopathies. For decades, investigating Tau fibrillization in vitro has required the addition of polyanions or other co-factors to induce its misfolding and aggregation, with heparin being the most commonly used. However, heparin-induced Tau fibrils exhibit high morphological heterogeneity and a striking structural divergence from Tau fibrils isolated from Tauopathies patients' brains at ultra- and macro-structural levels. To address these limitations, we developed a quick, cheap, and effective method for producing completely co-factor-free fibrils from all full-length Tau isoforms and mixtures thereof. We show that Tau fibrils generated using this ClearTau method - ClearTau fibrils - exhibit amyloid-like features, possess seeding activity in biosensor cells and hiPSC-derived neurons, retain RNA-binding capacity, and have morphological properties and structures more reminiscent of the properties of the brain-derived Tau fibrils. We present the proof-of-concept implementation of the ClearTau platform for screening Tau aggregation-modifying compounds. We demonstrate that these advances open opportunities to investigate the pathophysiology of disease-relevant Tau aggregates and will facilitate the development of Tau pathology-targeting and modifying therapies and PET tracers that can distinguish between different Tauopathies.
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Authors: Limorenko, G., Tatli, M., Kolla, R., Nazarov, S., Weil, M.T., Schondorf, D.C., Geist, D., Reinhardt, P., Ehrnhoefer, D.E., Stahlberg, H., Gasparini, L., Lashuel, H.A.
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Fully co-factor-free ClearTau platform produces seeding-competent Tau fibrils for reconstructing pathological Tau aggregates.,Limorenko G, Tatli M, Kolla R, Nazarov S, Weil MT, Schondorf DC, Geist D, Reinhardt P, Ehrnhoefer DE, Stahlberg H, Gasparini L, Lashuel HA Nat Commun. 2023 Jul 4;14(1):3939. doi: 10.1038/s41467-023-39314-7. PMID:37402718<ref>PMID:37402718</ref>
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Description: Cofactor-free Tau 4R2N isoform
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[Category: Unreleased Structures]]
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</div>
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[[Category: Schondorf, D.C]]
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<div class="pdbe-citations 8r3t" style="background-color:#fffaf0;"></div>
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[[Category: Kolla, R]]
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== References ==
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[[Category: Reinhardt, P]]
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<references/>
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[[Category: Weil, M.T]]
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__TOC__
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[[Category: Gasparini, L]]
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</StructureSection>
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[[Category: Ehrnhoefer, D.E]]
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[[Category: Homo sapiens]]
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[[Category: Geist, D]]
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[[Category: Large Structures]]
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[[Category: Nazarov, S]]
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[[Category: Ehrnhoefer DE]]
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[[Category: Limorenko, G]]
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[[Category: Gasparini L]]
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[[Category: Lashuel, H.A]]
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[[Category: Geist D]]
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[[Category: Stahlberg, H]]
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[[Category: Kolla R]]
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[[Category: Tatli, M]]
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[[Category: Lashuel HA]]
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[[Category: Limorenko G]]
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[[Category: Nazarov S]]
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[[Category: Reinhardt P]]
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[[Category: Schondorf DC]]
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[[Category: Stahlberg H]]
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[[Category: Tatli M]]
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[[Category: Weil MT]]

Current revision

Cofactor-free Tau 4R2N isoform

PDB ID 8r3t

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