6tjo

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== Function ==
== Function ==
[[http://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>
[[http://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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== Publication Abstract from PubMed ==
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Corticobasal degeneration (CBD) is a neurodegenerative tauopathy that is characterised by motor and cognitive disturbances(1-3). A higher frequency of the H1 haplotype of MAPT, the tau gene, is present in cases of CBD than in controls(4,5) and genome-wide association studies have identified additional risk factors(6). By histology, astrocytic plaques are diagnostic of CBD(7,8), as are detergent-insoluble tau fragments of 37 kDa by SDS-PAGE(9). Like progressive supranuclear palsy (PSP), globular glial tauopathy (GGT) and argyrophilic grain disease (AGD)(10), CBD is characterized by abundant filamentous tau inclusions that are made of isoforms with four microtubule-binding repeats (4R)(11-15). This distinguishes 4R tauopathies from Pick's disease, filaments of which are made of three-repeat (3R) tau isoforms, and from Alzheimer's disease and chronic traumatic encephalopathy (CTE), where both 3R and 4R tau isoforms are found in the filaments(16). Here we report the structures of tau filaments extracted from the brains of three individuals with CBD using electron cryo-microscopy (cryo-EM). They were identical between cases, but distinct from those of Alzheimer's disease, Pick's disease and CTE(17-19). The core of CBD filaments comprises residues K274-E380 of tau, spanning the last residue of R1, the whole of R2, R3 and R4, as well as 12 amino acids after R4. It adopts a novel four-layered fold, which encloses a large non-proteinaceous density. The latter is surrounded by the side chains of lysine residues 290 and 294 from R2 and 370 from the sequence after R4. CBD is the first 4R tauopathy with filaments of known structure.
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Novel tau filament fold in corticobasal degeneration.,Zhang W, Tarutani A, Newell KL, Murzin AG, Matsubara T, Falcon B, Vidal R, Garringer HJ, Shi Y, Ikeuchi T, Murayama S, Ghetti B, Hasegawa M, Goedert M, Scheres SHW Nature. 2020 Feb 12. pii: 10.1038/s41586-020-2043-0. doi:, 10.1038/s41586-020-2043-0. PMID:32050258<ref>PMID:32050258</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
== References ==
<references/>
<references/>

Revision as of 10:31, 26 February 2020

Cryo-EM structure of TypeI tau filaments extracted from the brains of individuals with Corticobasal degeneration

PDB ID 6tjo

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