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- EMDB-51731: In situ PSII subtomogram average from Chlamydomonas reinhardtii -

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Basic information

Entry
Database: EMDB / ID: EMD-51731
TitleIn situ PSII subtomogram average from Chlamydomonas reinhardtii
Map data
Sample
  • Cell: Chlamydomonas reinhardtii
Keywordscryo-et / chlamydomonas / tomography / in situ / membrane / PHOTOSYNTHESIS
Biological speciesChlamydomonas reinhardtii (plant)
Methodsubtomogram averaging / cryo EM / Resolution: 18.8 Å
Authorsvan Dorst S / Heebner JE / Lamm L / Righetto RD / Wietrzynski W / Khavnekar S / Kotecha A / Engel BD
Funding support Switzerland, 1 items
OrganizationGrant numberCountry
Swiss State Secretariat for Education, Research and InnovationM822.00045 Switzerland
CitationJournal: To Be Published
Title: Towards community-driven visual proteomics with large-scale cryo-electron tomography of Chlamydomonas reinhardtii
Authors: Kelley R / Khavnekar S / Righetto RD / Heebner JE / Zhang X / Obr M / Chakraborty S / Tagiltsev G / Michael AK / van Dorst S / Waltz F / McCafferty CL / Lamm L / Van der Stappen P / van den ...Authors: Kelley R / Khavnekar S / Righetto RD / Heebner JE / Zhang X / Obr M / Chakraborty S / Tagiltsev G / Michael AK / van Dorst S / Waltz F / McCafferty CL / Lamm L / Van der Stappen P / van den Hoek H / Wietrzynski W / Korir PK / Weyand S / Chareshneu A / Briggs JAG / Plitzko J / Engel BD / Kotecha A
History
DepositionOct 4, 2024-
Header (metadata) releaseNov 6, 2024-
Map releaseNov 6, 2024-
UpdateNov 6, 2024-
Current statusNov 6, 2024Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_51731.png

Downloads & links

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Map

FileDownload / File: emd_51731.map.gz / Format: CCP4 / Size: 52.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.96 Å/pix.
x 240 pix.
= 470.4 Å		1.96 Å/pix.
x 240 pix.
= 470.4 Å		1.96 Å/pix.
x 240 pix.
= 470.4 Å

Surface

Projections

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Slices (1/2)

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.96 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.02
Minimum - Maximum-0.12951437 - 0.1648417
Average (Standard dev.)-0.000000000000001 (±0.019341636)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions240240240
Spacing240240240
CellA=B=C: 470.40002 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_51731_msk_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_51731_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_51731_half_map_2.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Chlamydomonas reinhardtii

EntireName: Chlamydomonas reinhardtii (plant)
Components
  • Cell: Chlamydomonas reinhardtii

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Supramolecule #1: Chlamydomonas reinhardtii

SupramoleculeName: Chlamydomonas reinhardtii / type: cell / ID: 1 / Parent: 0
Source (natural)Organism: Chlamydomonas reinhardtii (plant) / Strain: CC-3994 mat3-4 mt+

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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
VitrificationCryogen name: ETHANE-PROPANE / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS KRIOS
Specialist opticsEnergy filter - Name: TFS Selectris X
Image recordingFilm or detector model: TFS FALCON 4i (4k x 4k) / Average electron dose: 3.5 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 3.5 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 64000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionNumber classes used: 1 / Applied symmetry - Point group: C2 (2 fold cyclic) / Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 18.8 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 4.0.1) / Number subtomograms used: 3123
ExtractionNumber tomograms: 21 / Number images used: 22917 / Method: AI voxel-based segmentation / Software - Name: STOPGAP (ver. 0.7.1) / Details: Initial angles assigned with MemBrain.
Final 3D classificationNumber classes: 4 / Software - Name: STOPGAP (ver. 0.7.1)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 4.0.1)

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