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- EMDB-65791: ATTRv-G83R type II filament from gastrocnemius muscle biopsy of a... -

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Basic information

Entry
Database: EMDB / ID: EMD-65791
TitleATTRv-G83R type II filament from gastrocnemius muscle biopsy of an individual with a G83R mutation.
Map data
Sample
  • Tissue: Transthyretin amyloid filaments
    • Protein or peptide: Transthyretin
KeywordsTransthyretin amyloid filament / PROTEIN FIBRIL
Function / homology
Function and homology information


Defective visual phototransduction due to STRA6 loss of function / negative regulation of glomerular filtration / The canonical retinoid cycle in rods (twilight vision) / purine nucleobase metabolic process / hormone binding / Non-integrin membrane-ECM interactions / phototransduction, visible light / molecular sequestering activity / Retinoid metabolism and transport / retinoid metabolic process ...Defective visual phototransduction due to STRA6 loss of function / negative regulation of glomerular filtration / The canonical retinoid cycle in rods (twilight vision) / purine nucleobase metabolic process / hormone binding / Non-integrin membrane-ECM interactions / phototransduction, visible light / molecular sequestering activity / Retinoid metabolism and transport / retinoid metabolic process / hormone activity / azurophil granule lumen / Amyloid fiber formation / Neutrophil degranulation / protein-containing complex binding / protein-containing complex / : / extracellular exosome / extracellular region / identical protein binding
Similarity search - Function
Transthyretin, conserved site / Transthyretin signature 2. / Transthyretin, thyroxine binding site / Transthyretin signature 1. / Transthyretin / Transthyretin/hydroxyisourate hydrolase / Transthyretin/hydroxyisourate hydrolase domain / Transthyretin/hydroxyisourate hydrolase domain superfamily / HIUase/Transthyretin family
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
Methodhelical reconstruction / cryo EM / Resolution: 2.27 Å
AuthorsZheng Y / Liang J / Liu Y / Shi Y
Funding support China, 3 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)82371415 China
National Natural Science Foundation of China (NSFC)32350018 China
National Natural Science Foundation of China (NSFC)82230031 China
CitationJournal: Nat Commun / Year: 2026
Title: Cryo-EM Structures of Biopsy-derived TTR Fibrils in Hereditary Transthyretin Amyloidosis
Authors: Zheng Y / Liang J / Li Z / Liu Y / Chu X / Zhang S / Wang W / Bao J / Liu B / Ma C / Yin G / Deng J / Chi W / Meng L / Shi Y
History
DepositionAug 10, 2025-
Header (metadata) releaseJul 29, 2026-
Map releaseJul 29, 2026-
UpdateJul 29, 2026-
Current statusJul 29, 2026Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_65791.png

Downloads & links

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Map

FileDownload / File: emd_65791.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.93 Å/pix.
x 360 pix.
= 334.8 Å		0.93 Å/pix.
x 360 pix.
= 334.8 Å		0.93 Å/pix.
x 360 pix.
= 334.8 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.93 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0077
Minimum - Maximum-0.021339212 - 0.049532965
Average (Standard dev.)0.00019768527 (±0.002030393)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions360360360
Spacing360360360
CellA=B=C: 334.8 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_65791_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_65791_half_map_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_65791_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Transthyretin amyloid filaments

EntireName: Transthyretin amyloid filaments
Components
  • Tissue: Transthyretin amyloid filaments
    • Protein or peptide: Transthyretin

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Supramolecule #1: Transthyretin amyloid filaments

SupramoleculeName: Transthyretin amyloid filaments / type: tissue / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Transthyretin

MacromoleculeName: Transthyretin / type: protein_or_peptide / ID: 1 / Details: Transthyretin with a G83R mutation / Number of copies: 6 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 13.877502 KDa
SequenceString:
GPTGTGESKC PLMVKVLDAV RGSPAINVAV HVFRKAADDT WEPFASGKTS ESGELHGLTT EEEFVEGIYK VEIDTKSYWK ALRISPFHE HAEVVFTAND SGPRRYTIAA LLSPYSYSTT AVVTNPKE

UniProtKB: Transthyretin

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Experimental details

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Structure determination

Methodcryo EM
Processinghelical reconstruction
Aggregation statefilament

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Sample preparation

BufferpH: 7
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 42.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.6 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionApplied symmetry - Helical parameters - Δz: 4.79 Å
Applied symmetry - Helical parameters - Δ&Phi: -0.77 °
Applied symmetry - Helical parameters - Axial symmetry: C1 (asymmetric)
Resolution.type: BY AUTHOR / Resolution: 2.27 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: PHENIX / Number images used: 264102
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: INSILICO MODEL
Final angle assignmentType: NOT APPLICABLE
FSC plot (resolution estimation)

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