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- EMDB-14424: Subtomogram average of 80S ribosomes associated to the ER predict... -

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Basic information

Entry
Database: EMDB / ID: EMD-14424
TitleSubtomogram average of 80S ribosomes associated to the ER predicted with DeePiCt in tomograms acquired on cryo-FIB-lamellae of S. pombe
Map dataSubtomogram average of 80S ribosomes connected to ER from tomograms acquired on cryo-FIB-lamellae of S. pombe
Sample
  • Complex: 80S ribosome associated to the ER in S. pombe cells
Keywords80S ribosome / ER / RIBOSOME
Biological speciesSchizosaccharomyces pombe (fission yeast)
Methodsubtomogram averaging / cryo EM / Resolution: 29.0 Å
AuthorsMahamid J / Goetz SK
Funding supportEuropean Union, 1 items
OrganizationGrant numberCountry
European Research Council (ERC)760067European Union
CitationJournal: Nat Methods / Year: 2023
Title: Convolutional networks for supervised mining of molecular patterns within cellular context.
Authors: Irene de Teresa-Trueba / Sara K Goetz / Alexander Mattausch / Frosina Stojanovska / Christian E Zimmerli / Mauricio Toro-Nahuelpan / Dorothy W C Cheng / Fergus Tollervey / Constantin Pape / ...Authors: Irene de Teresa-Trueba / Sara K Goetz / Alexander Mattausch / Frosina Stojanovska / Christian E Zimmerli / Mauricio Toro-Nahuelpan / Dorothy W C Cheng / Fergus Tollervey / Constantin Pape / Martin Beck / Alba Diz-Muñoz / Anna Kreshuk / Julia Mahamid / Judith B Zaugg /
Abstract: Cryo-electron tomograms capture a wealth of structural information on the molecular constituents of cells and tissues. We present DeePiCt (deep picker in context), an open-source deep-learning ...Cryo-electron tomograms capture a wealth of structural information on the molecular constituents of cells and tissues. We present DeePiCt (deep picker in context), an open-source deep-learning framework for supervised segmentation and macromolecular complex localization in cryo-electron tomography. To train and benchmark DeePiCt on experimental data, we comprehensively annotated 20 tomograms of Schizosaccharomyces pombe for ribosomes, fatty acid synthases, membranes, nuclear pore complexes, organelles, and cytosol. By comparing DeePiCt to state-of-the-art approaches on this dataset, we show its unique ability to identify low-abundance and low-density complexes. We use DeePiCt to study compositionally distinct subpopulations of cellular ribosomes, with emphasis on their contextual association with mitochondria and the endoplasmic reticulum. Finally, applying pre-trained networks to a HeLa cell tomogram demonstrates that DeePiCt achieves high-quality predictions in unseen datasets from different biological species in a matter of minutes. The comprehensively annotated experimental data and pre-trained networks are provided for immediate use by the community.
History
DepositionFeb 23, 2022-
Header (metadata) releaseNov 16, 2022-
Map releaseNov 16, 2022-
UpdateDec 13, 2023-
Current statusDec 13, 2023Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_14424.png

Downloads & links

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Map

FileDownload / File: emd_14424.map.gz / Format: CCP4 / Size: 10.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationSubtomogram average of 80S ribosomes connected to ER from tomograms acquired on cryo-FIB-lamellae of S. pombe
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
3.37 Å/pix.
x 140 pix.
= 471.828 Å		3.37 Å/pix.
x 140 pix.
= 471.828 Å		3.37 Å/pix.
x 140 pix.
= 471.828 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 3.3702 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.155
Minimum - Maximum-0.2062817 - 0.67831594
Average (Standard dev.)0.026435617 (±0.096744075)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions140140140
Spacing140140140
CellA=B=C: 471.828 Å
α=β=γ: 90.0 °

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Supplemental data

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Sample components

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Entire : 80S ribosome associated to the ER in S. pombe cells

EntireName: 80S ribosome associated to the ER in S. pombe cells
Components
  • Complex: 80S ribosome associated to the ER in S. pombe cells

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Supramolecule #1: 80S ribosome associated to the ER in S. pombe cells

SupramoleculeName: 80S ribosome associated to the ER in S. pombe cells / type: complex / ID: 1 / Parent: 0
Source (natural)Organism: Schizosaccharomyces pombe (fission yeast) / Location in cell: cytoplasm

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Experimental details

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Structure determination

Methodcryo EM
Processingsubtomogram averaging
Aggregation statecell

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Sample preparation

BufferpH: 7
GridModel: Quantifoil R2/1 / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Specialist opticsEnergy filter - Name: GIF Quantum LS / Energy filter - Slit width: 20 eV
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 2.4 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 4.0 µm / Nominal defocus min: 2.0 µm / Nominal magnification: 42000
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 29.0 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number subtomograms used: 422
ExtractionNumber tomograms: 7 / Number images used: 810 / Software - Name: Warp
Final 3D classificationSoftware - Name: RELION
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
FSC plot (resolution estimation)

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