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- EMDB-0931: Cryo-EM structure of amyloid fibril formed by full-length human p... -

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Basic information

Entry
Database: EMDB / ID: EMD-0931
TitleCryo-EM structure of amyloid fibril formed by full-length human prion protein
Map data
Sample
  • Organelle or cellular component: human prion protein amyloid fibril
    • Protein or peptide: Major prion protein
KeywordsAmyloid fibril / PROTEIN FIBRIL
Function / homology
Function and homology information


negative regulation of amyloid precursor protein catabolic process / regulation of glutamate receptor signaling pathway / lamin binding / aspartic-type endopeptidase inhibitor activity / regulation of calcium ion import across plasma membrane / positive regulation of glutamate receptor signaling pathway / glycosaminoglycan binding / NCAM1 interactions / type 5 metabotropic glutamate receptor binding / ATP-dependent protein binding ...negative regulation of amyloid precursor protein catabolic process / regulation of glutamate receptor signaling pathway / lamin binding / aspartic-type endopeptidase inhibitor activity / regulation of calcium ion import across plasma membrane / positive regulation of glutamate receptor signaling pathway / glycosaminoglycan binding / NCAM1 interactions / type 5 metabotropic glutamate receptor binding / ATP-dependent protein binding / negative regulation of interleukin-17 production / cupric ion binding / regulation of potassium ion transmembrane transport / negative regulation of dendritic spine maintenance / negative regulation of protein processing / dendritic spine maintenance / negative regulation of calcineurin-NFAT signaling cascade / extrinsic component of membrane / negative regulation of interleukin-2 production / Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / negative regulation of T cell receptor signaling pathway / negative regulation of activated T cell proliferation / cuprous ion binding / negative regulation of amyloid-beta formation / response to amyloid-beta / negative regulation of type II interferon production / negative regulation of long-term synaptic potentiation / intracellular copper ion homeostasis / positive regulation of protein targeting to membrane / long-term memory / response to cadmium ion / inclusion body / neuron projection maintenance / tubulin binding / positive regulation of calcium-mediated signaling / cellular response to copper ion / molecular function activator activity / positive regulation of protein localization to plasma membrane / molecular condensate scaffold activity / protein destabilization / protein homooligomerization / cellular response to xenobiotic stimulus / terminal bouton / cellular response to amyloid-beta / positive regulation of neuron apoptotic process / signaling receptor activity / protein-folding chaperone binding / amyloid-beta binding / response to oxidative stress / protease binding / nuclear membrane / microtubule binding / molecular adaptor activity / transmembrane transporter binding / learning or memory / postsynapse / regulation of cell cycle / postsynaptic density / intracellular signal transduction / membrane raft / copper ion binding / external side of plasma membrane / intracellular membrane-bounded organelle / dendrite / negative regulation of apoptotic process / protein-containing complex binding / cell surface / endoplasmic reticulum / negative regulation of transcription by RNA polymerase II / Golgi apparatus / extracellular exosome / identical protein binding / plasma membrane / cytosol / cytoplasm
Similarity search - Function
Prion, copper binding octapeptide repeat / Copper binding octapeptide repeat region / Major prion protein N-terminal domain / Major prion protein bPrPp - N terminal / Prion protein signature 1. / Prion protein signature 2. / Prion protein / Major prion protein / Prion/Doppel protein, beta-ribbon domain / Prion/Doppel beta-ribbon domain superfamily / Prion/Doppel alpha-helical domain
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
Methodhelical reconstruction / cryo EM / Resolution: 2.702 Å
AuthorsWang LQ / Zhao K
CitationJournal: Nat Struct Mol Biol / Year: 2020
Title: Cryo-EM structure of an amyloid fibril formed by full-length human prion protein.
Authors: Li-Qiang Wang / Kun Zhao / Han-Ye Yuan / Qiang Wang / Zeyuan Guan / Jing Tao / Xiang-Ning Li / Yunpeng Sun / Chuan-Wei Yi / Jie Chen / Dan Li / Delin Zhang / Ping Yin / Cong Liu / Yi Liang /
Abstract: Prion diseases are caused by the misfolding of prion protein (PrP). Misfolded PrP forms protease-resistant aggregates in vivo (PrP) that are able to template the conversion of the native form of the ...Prion diseases are caused by the misfolding of prion protein (PrP). Misfolded PrP forms protease-resistant aggregates in vivo (PrP) that are able to template the conversion of the native form of the protein (PrP), a property shared by in vitro-produced PrP fibrils. Here we produced amyloid fibrils in vitro from recombinant, full-length human PrP (residues 23-231) and determined their structure using cryo-EM, building a model for the fibril core comprising residues 170-229. The PrP fibril consists of two protofibrils intertwined in a left-handed helix. Lys194 and Glu196 from opposing subunits form salt bridges, creating a hydrophilic cavity at the interface of the two protofibrils. By comparison with the structure of PrP, we propose that two α-helices in the C-terminal domain of PrP are converted into β-strands stabilized by a disulfide bond in the PrP fibril. Our data suggest that different PrP mutations may play distinct roles in modulating the conformational conversion.
History
DepositionDec 30, 2019-
Header (metadata) releaseJun 10, 2020-
Map releaseJun 10, 2020-
UpdateOct 9, 2024-
Current statusOct 9, 2024Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.013
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.013
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6lni
  • Surface level: 0.013
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-6lni
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_0931.png

Downloads & links

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Map

FileDownload / File: emd_0931.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.01 Å/pix.
x 400 pix.
= 405.6 Å		1.01 Å/pix.
x 400 pix.
= 405.6 Å		1.01 Å/pix.
x 400 pix.
= 405.6 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.014 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.013 / Movie #1: 0.013
Minimum - Maximum-0.050022557 - 0.11823607
Average (Standard dev.)0.00020733173 (±0.0033544828)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 405.60004 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0141.0141.014
M x/y/z400400400
origin x/y/z0.0000.0000.000
length x/y/z405.600405.600405.600
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS400400400
D min/max/mean-0.0500.1180.000

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Supplemental data

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Sample components

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Entire : human prion protein amyloid fibril

EntireName: human prion protein amyloid fibril
Components
  • Organelle or cellular component: human prion protein amyloid fibril
    • Protein or peptide: Major prion protein

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Supramolecule #1: human prion protein amyloid fibril

SupramoleculeName: human prion protein amyloid fibril / type: organelle_or_cellular_component / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Major prion protein

MacromoleculeName: Major prion protein / type: protein_or_peptide / ID: 1 / Number of copies: 10 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 22.996355 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MKKRPKPGGW NTGGSRYPGQ GSPGGNRYPP QGGGGWGQPH GGGWGQPHGG GWGQPHGGGW GQPHGGGWGQ GGGTHSQWNK PSKPKTNMK HMAGAAAAGA VVGGLGGYML GSAMSRPIIH FGSDYEDRYY RENMHRYPNQ VYYRPMDEYS NQNNFVHDCV N ITIKQHTV ...String:
MKKRPKPGGW NTGGSRYPGQ GSPGGNRYPP QGGGGWGQPH GGGWGQPHGG GWGQPHGGGW GQPHGGGWGQ GGGTHSQWNK PSKPKTNMK HMAGAAAAGA VVGGLGGYML GSAMSRPIIH FGSDYEDRYY RENMHRYPNQ VYYRPMDEYS NQNNFVHDCV N ITIKQHTV TTTTKGENFT ETDVKMMERV VEQMCITQYE RESQAYYQRG SS

UniProtKB: Major prion protein

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Experimental details

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Structure determination

Methodcryo EM
Processinghelical reconstruction
Aggregation statehelical array

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Sample preparation

BufferpH: 5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 QUANTUM (4k x 4k) / Average electron dose: 64.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionApplied symmetry - Helical parameters - Δz: 2.403 Å
Applied symmetry - Helical parameters - Δ&Phi: 179.449 °
Applied symmetry - Helical parameters - Axial symmetry: C1 (asymmetric)
Resolution.type: BY AUTHOR / Resolution: 2.702 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 86012
Startup modelType of model: NONE
Final angle assignmentType: NOT APPLICABLE
FSC plot (resolution estimation)

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