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TitleNovel tau filament fold in corticobasal degeneration.
Journal, issue, pagesNature, Vol. 580, Issue 7802, Page 283-287, Year 2020
Publish dateFeb 12, 2020
AuthorsWenjuan Zhang / Airi Tarutani / Kathy L Newell / Alexey G Murzin / Tomoyasu Matsubara / Benjamin Falcon / Ruben Vidal / Holly J Garringer / Yang Shi / Takeshi Ikeuchi / Shigeo Murayama / Bernardino Ghetti / Masato Hasegawa / Michel Goedert / Sjors H W Scheres /
PubMed AbstractCorticobasal degeneration (CBD) is a neurodegenerative tauopathy-a class of disorders in which the tau protein forms insoluble inclusions in the brain-that is characterized by motor and cognitive ...Corticobasal degeneration (CBD) is a neurodegenerative tauopathy-a class of disorders in which the tau protein forms insoluble inclusions in the brain-that is characterized by motor and cognitive disturbances. The H1 haplotype of MAPT (the tau gene) is present in cases of CBD at a higher frequency than in controls, and genome-wide association studies have identified additional risk factors. By histology, astrocytic plaques are diagnostic of CBD; by SDS-PAGE, so too are detergent-insoluble, 37 kDa fragments of tau. Like progressive supranuclear palsy, globular glial tauopathy and argyrophilic grain disease, CBD is characterized by abundant filamentous tau inclusions that are made of isoforms with four microtubule-binding repeats. This distinguishes such '4R' tauopathies from Pick's disease (the filaments of which are made of three-repeat (3R) tau isoforms) and from Alzheimer's disease and chronic traumatic encephalopathy (CTE) (in which both 3R and 4R isoforms are found in the filaments). Here we use cryo-electron microscopy to analyse the structures of tau filaments extracted from the brains of three individuals with CBD. These filaments were identical between cases, but distinct from those seen in Alzheimer's disease, Pick's disease and CTE. The core of a CBD filament comprises residues lysine 274 to glutamate 380 of tau, spanning the last residue of the R1 repeat, the whole of the R2, R3 and R4 repeats, and 12 amino acids after R4. The core adopts a previously unseen four-layered fold, which encloses a large nonproteinaceous density. This density is surrounded by the side chains of lysine residues 290 and 294 from R2 and lysine 370 from the sequence after R4.
External linksNature / PubMed:32050258 / PubMed Central
MethodsEM (helical sym.)
Resolution3.0 - 3.2 Å
Structure data

10512

6tjo

EMDB-10512: Cryo-EM reconstruction of TypeI tau filaments extracted from the brains of an individual (Case 1) with Corticobasal degeneration
PDB-6tjo: Cryo-EM structure of TypeI tau filaments extracted from the brains of individuals with Corticobasal degeneration
Method: EM (helical sym.) / Resolution: 3.2 Å

10514

6tjx

EMDB-10514: Cryo-EM reconstruction of TypeII tau filaments extracted from the brains of individuals with Corticobasal degeneration
PDB-6tjx: Cryo-EM structure of TypeII tau filaments extracted from the brains of individuals with Corticobasal degeneration
Method: EM (helical sym.) / Resolution: 3.0 Å

Source
  • homo sapiens (human)
KeywordsPROTEIN FIBRIL / tau protein / filament / cross-beta structure

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