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- EMDB-13603: Asymmetric single particle reconstruction of the Haliangium ochra... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-13603 | |||||||||
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Title | Asymmetric single particle reconstruction of the Haliangium ochraceum encapsulin encapsulated ferritin complex calculated using Cryosparc | |||||||||
![]() | cryosparc map | |||||||||
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Function / homology | ![]() encapsulin nanocompartment / ferroxidase / ferroxidase activity / iron ion transport / intracellular iron ion homeostasis / metal ion binding Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.24 Å | |||||||||
![]() | Marles-Wright J / Basle A / Ross J / Clarke DJ | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Pore dynamics and asymmetric cargo loading in an encapsulin nanocompartment. Authors: Jennifer Ross / Zak McIver / Thomas Lambert / Cecilia Piergentili / Jasmine Emma Bird / Kelly J Gallagher / Faye L Cruickshank / Patrick James / Efrain Zarazúa-Arvizu / Louise E Horsfall / ...Authors: Jennifer Ross / Zak McIver / Thomas Lambert / Cecilia Piergentili / Jasmine Emma Bird / Kelly J Gallagher / Faye L Cruickshank / Patrick James / Efrain Zarazúa-Arvizu / Louise E Horsfall / Kevin J Waldron / Marcus D Wilson / C Logan Mackay / Arnaud Baslé / David J Clarke / Jon Marles-Wright / ![]() Abstract: Encapsulins are protein nanocompartments that house various cargo enzymes, including a family of decameric ferritin-like proteins. Here, we study a recombinant encapsulin:encapsulated ferritin ...Encapsulins are protein nanocompartments that house various cargo enzymes, including a family of decameric ferritin-like proteins. Here, we study a recombinant encapsulin:encapsulated ferritin complex using cryo-electron microscopy and hydrogen/deuterium exchange mass spectrometry to gain insight into the structural relationship between the encapsulin shell and its protein cargo. An asymmetric single-particle reconstruction reveals four encapsulated ferritin decamers in a tetrahedral arrangement within the encapsulin nanocompartment. This leads to a symmetry mismatch between the protein cargo and the icosahedral encapsulin shell. The encapsulated ferritin decamers are offset from the interior face of the encapsulin shell. Using hydrogen/deuterium exchange mass spectrometry, we observed the dynamic behavior of the major fivefold pore in the encapsulin shell and show the pore opening via the movement of the encapsulin A-domain. These data will accelerate efforts to engineer the encapsulation of heterologous cargo proteins and to alter the permeability of the encapsulin shell via pore modifications. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 364.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 22.2 KB 22.2 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 22 KB | Display | ![]() |
Images | ![]() | 75.4 KB | ||
Masks | ![]() | 421.9 MB | ![]() | |
Others | ![]() ![]() ![]() | 394.6 MB 390.9 MB 390.9 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Annotation | cryosparc map | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.652 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Mask #1
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Density Histograms |
-Additional map: sharpened map
File | emd_13603_additional_1.map | ||||||||||||
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Annotation | sharpened map | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: Half map A
File | emd_13603_half_map_1.map | ||||||||||||
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Annotation | Half map A | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: Half map B
File | emd_13603_half_map_2.map | ||||||||||||
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Annotation | Half map B | ||||||||||||
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Density Histograms |
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Sample components
-Entire : Ternary complex of Haliangium ochraceum encapsulin and encapsulat...
Entire | Name: Ternary complex of Haliangium ochraceum encapsulin and encapsulated ferritin proteins |
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Components |
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-Supramolecule #1: Ternary complex of Haliangium ochraceum encapsulin and encapsulat...
Supramolecule | Name: Ternary complex of Haliangium ochraceum encapsulin and encapsulated ferritin proteins type: complex / ID: 1 / Parent: 0 / Macromolecule list: all / Details: Complex produced by co-expression in E. coli |
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Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() ![]() |
Molecular weight | Theoretical: 1.8 MDa |
-Macromolecule #1: Haliangium ochraceum encapsulin
Macromolecule | Name: Haliangium ochraceum encapsulin / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MDLLKRHLAP IVPDAWSAID EEAKEIFQGH LAGRKLVDFR GPFGWEYAAV NTGELRPIDD TPEDVDMKL RQVQPLAEVR VPFTLDVTEL DSVARGATNP DLDDVARAAE RMVEAEDSAI F HGWAQAGI KGIVDSTPHE ALAVASVSDF PRAVLSAADT LRKAGVTGPY ...String: MDLLKRHLAP IVPDAWSAID EEAKEIFQGH LAGRKLVDFR GPFGWEYAAV NTGELRPIDD TPEDVDMKL RQVQPLAEVR VPFTLDVTEL DSVARGATNP DLDDVARAAE RMVEAEDSAI F HGWAQAGI KGIVDSTPHE ALAVASVSDF PRAVLSAADT LRKAGVTGPY ALVLGPKAYD DL FAATQDG YPVAKQVQRL VVDGPLVRAN ALAGALVMSM RGGDYELTVG QDLSIGYAFH DRS KVELFV AESFTFRVLE PGAAVHLRYA |
-Macromolecule #2: Haliangium ochraceum encapsulated ferritin
Macromolecule | Name: Haliangium ochraceum encapsulated ferritin / type: protein_or_peptide / ID: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MSSEQLHEPA ELLSEETKNM HRALVTLIEE LEAVDWYQQR ADACSEPGLH DVLIHNKNEE VEHAMMTLE WIRRRSPVFD AHMRTYLFTE RPILELEEED TGSSSSVAAS PTSAPSHGSL G IGSLRQEG KED |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 3 mg/mL | |||||||||
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Buffer | pH: 8 Component:
Details: Solutions were prepared with MilliQ water and filtered using a 0.22 um filter. | |||||||||
Grid | Model: Quantifoil / Material: GOLD / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: AIR | |||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 281 K / Instrument: FEI VITROBOT MARK IV Details: blot force -5, wait time 10 seconds and blot time of 3 seconds. | |||||||||
Details | Sample mono disperse as determined by SEC |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Digitization - Dimensions - Width: 1150 pixel / Digitization - Dimensions - Height: 8184 pixel / Number grids imaged: 1 / Number real images: 8109 / Average exposure time: 1.0 sec. / Average electron dose: 40.509 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: OTHER / Imaging mode: BRIGHT FIELD |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |