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- EMDB-27346: nsEM map of hemagglutinin H1 A/Mich/045/15 complexed with polyclo... -
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Open data
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Basic information
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Title | nsEM map of hemagglutinin H1 A/Mich/045/15 complexed with polyclonal Fab from individual 182419 at day 0 | ||||||||||||
![]() | nsEM map of hemagglutinin H1 A/Mich/045/15 complexed with polyclonal Fab samples from individual 182419 at day 0 | ||||||||||||
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Biological species | ![]() ![]() | ||||||||||||
Method | ![]() ![]() | ||||||||||||
![]() | Torrents de la Pena A / Sewall LM / Ward AB | ||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Increasing sensitivity of antibody-antigen interactions using photo-cross-linking. Authors: Alba Torrents de la Peña / Leigh M Sewall / Rebeca de Paiva Froes Rocha / Abigail M Jackson / Payal P Pratap / Sandhya Bangaru / Christopher A Cottrell / Subhasis Mohanty / Albert C Shaw / Andrew B Ward / ![]() Abstract: Understanding antibody-antigen interactions in a polyclonal immune response in humans and animal models is critical for rational vaccine design. Current approaches typically characterize antibodies ...Understanding antibody-antigen interactions in a polyclonal immune response in humans and animal models is critical for rational vaccine design. Current approaches typically characterize antibodies that are functionally relevant or highly abundant. Here, we use photo-cross-linking and single-particle electron microscopy to increase antibody detection and unveil epitopes of low-affinity and low-abundance antibodies, leading to a broader structural characterization of polyclonal immune responses. We employed this approach across three different viral glycoproteins and showed increased sensitivity of detection relative to currently used methods. Results were most noticeable in early and late time points of a polyclonal immune response. Additionally, the use of photo-cross-linking revealed intermediate antibody binding states and demonstrated a distinctive way to study antibody binding mechanisms. This technique can be used to structurally characterize the landscape of a polyclonal immune response of patients in vaccination or post-infection studies at early time points, allowing for rapid iterative design of vaccine immunogens. | ||||||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 23.5 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 15.3 KB 15.3 KB | Display Display | ![]() |
Images | ![]() | 16.7 KB | ||
Others | ![]() ![]() | 23.5 MB 23.5 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | C: citing same article ( |
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Links
EMDB pages | ![]() ![]() |
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Map
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Annotation | nsEM map of hemagglutinin H1 A/Mich/045/15 complexed with polyclonal Fab samples from individual 182419 at day 0 | ||||||||||||||||||||
Voxel size | X=Y=Z: 2.06 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: nsEM half map of hemagglutinin H1 A/Mich/045/15 complexed...
File | emd_27346_half_map_1.map | ||||||||||||
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Annotation | nsEM half map of hemagglutinin H1 A/Mich/045/15 complexed with polyclonal Fab samples from individual 182419 at day 0 | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: nsEM half map of hemagglutinin H1 A/Mich/045/15 complexed...
File | emd_27346_half_map_2.map | ||||||||||||
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Annotation | nsEM half map of hemagglutinin H1 A/Mich/045/15 complexed with polyclonal Fab samples from individual 182419 at day 0 | ||||||||||||
Projections & Slices |
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Density Histograms |
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Sample components
-Entire : nsEM map of hemagglutinin H1 A/Mich/045/15 complexed with polyclo...
Entire | Name: nsEM map of hemagglutinin H1 A/Mich/045/15 complexed with polyclonal Fab samples from individual 182419 at day 0 |
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Components |
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-Supramolecule #1: nsEM map of hemagglutinin H1 A/Mich/045/15 complexed with polyclo...
Supramolecule | Name: nsEM map of hemagglutinin H1 A/Mich/045/15 complexed with polyclonal Fab samples from individual 182419 at day 0 type: complex / ID: 1 / Parent: 0 Details: HA recombinantly expressed in HEK 293F cells Fab samples isolated from several individuals at different timepoints |
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Source (natural) | Organism: ![]() ![]() |
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Concentration | 0.02 mg/mL |
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Buffer | pH: 7.4 / Component - Concentration: 0.02 0.020 / Component - Formula: TBS / Component - Name: Tris-buffered saline |
Staining | Type: NEGATIVE / Material: Uranyl Formate |
Grid | Model: EMS Lacey Carbon / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: CONTINUOUS / Pretreatment - Type: PLASMA CLEANING / Pretreatment - Time: 20 sec. |
Details | 15 ug of H1 A/Mich15/045/15 was complexed overnight with 500 ug of polyclonal Fab samples and SEC purified. The complex peak was concentrated to ~0.02 mg/ml and imaged |
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Electron microscopy
Microscope | FEI TECNAI SPIRIT |
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Electron beam | Acceleration voltage: 120 kV / Electron source: LAB6 |
Electron optics | C2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Sample stage | Cooling holder cryogen: NITROGEN |
Image recording | Film or detector model: FEI EAGLE (4k x 4k) / Number grids imaged: 1 / Average electron dose: 50.0 e/Å2 |
Experimental equipment | ![]() Model: Tecnai Spirit / Image courtesy: FEI Company |
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Image processing
Particle selection | Number selected: 188307 |
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Startup model | Type of model: PDB ENTRY PDB model - PDB ID: |
Initial angle assignment | Type: OTHER / Software - Name: RELION (ver. 3.0) / Details: bayesian polishing |
Final angle assignment | Type: OTHER / Software - Name: RELION (ver. 3.0) / Details: bayesian polishing |
Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 25.0 Å / Resolution method: FSC 0.5 CUT-OFF / Software - Name: RELION (ver. 3.0) / Number images used: 104333 |