+
Open data
-
Basic information
Entry | Database: PDB / ID: 6vja | ||||||
---|---|---|---|---|---|---|---|
Title | Structure of CD20 in complex with rituximab Fab | ||||||
![]() |
| ||||||
![]() | IMMUNE SYSTEM / MS4A1 / CD20 / human / Rituximab / therapeutic / antibody | ||||||
Function / homology | ![]() store-operated calcium entry / positive regulation of calcium ion import across plasma membrane / calcium ion import into cytosol / epidermal growth factor receptor binding / B cell activation / B cell proliferation / plasma membrane raft / immunoglobulin binding / humoral immune response / B cell differentiation ...store-operated calcium entry / positive regulation of calcium ion import across plasma membrane / calcium ion import into cytosol / epidermal growth factor receptor binding / B cell activation / B cell proliferation / plasma membrane raft / immunoglobulin binding / humoral immune response / B cell differentiation / protein tetramerization / B cell receptor signaling pathway / response to bacterium / MHC class II protein complex binding / cell surface receptor signaling pathway / external side of plasma membrane / cell surface / extracellular space / extracellular exosome / nucleoplasm / identical protein binding / plasma membrane Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å | ||||||
![]() | Rohou, A. / Croll, T.I. | ||||||
![]() | ![]() Title: Structure of CD20 in complex with the therapeutic monoclonal antibody rituximab. Authors: Lionel Rougé / Nancy Chiang / Micah Steffek / Christine Kugel / Tristan I Croll / Christine Tam / Alberto Estevez / Christopher P Arthur / Christopher M Koth / Claudio Ciferri / Edward ...Authors: Lionel Rougé / Nancy Chiang / Micah Steffek / Christine Kugel / Tristan I Croll / Christine Tam / Alberto Estevez / Christopher P Arthur / Christopher M Koth / Claudio Ciferri / Edward Kraft / Jian Payandeh / Gerald Nakamura / James T Koerber / Alexis Rohou / ![]() ![]() Abstract: Cluster of differentiation 20 (CD20) is a B cell membrane protein that is targeted by monoclonal antibodies for the treatment of malignancies and autoimmune disorders but whose structure and function ...Cluster of differentiation 20 (CD20) is a B cell membrane protein that is targeted by monoclonal antibodies for the treatment of malignancies and autoimmune disorders but whose structure and function are unknown. Rituximab (RTX) has been in clinical use for two decades, but how it activates complement to kill B cells remains poorly understood. We obtained a structure of CD20 in complex with RTX, revealing CD20 as a compact double-barrel dimer bound by two RTX antigen-binding fragments (Fabs), each of which engages a composite epitope and an extensive homotypic Fab:Fab interface. Our data suggest that RTX cross-links CD20 into circular assemblies and lead to a structural model for complement recruitment. Our results further highlight the potential relevance of homotypic Fab:Fab interactions in targeting oligomeric cell-surface markers. | ||||||
History |
|
-
Structure visualization
Movie |
![]() |
---|---|
Structure viewer | Molecule: ![]() ![]() |
-
Downloads & links
-
Download
PDBx/mmCIF format | ![]() | 216.8 KB | Display | ![]() |
---|---|---|---|---|
PDB format | ![]() | 177.9 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
---|
-Related structure data
Related structure data | ![]() 21212MC M: map data used to model this data C: citing same article ( |
---|---|
Similar structure data |
-
Links
-
Assembly
Deposited unit | ![]()
|
---|---|
1 |
|
-
Components
#1: Protein | Mass: 31320.789 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #2: Antibody | Mass: 23733.541 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #3: Antibody | Mass: 23078.623 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #4: Chemical | ChemComp-Y01 / Has ligand of interest | N | |
---|
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
---|---|
EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-
Sample preparation
Component | Name: CD20 in complex with rituximab Fab / Type: COMPLEX / Entity ID: #1-#3 / Source: MULTIPLE SOURCES | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Molecular weight | Value: 0.135 MDa / Experimental value: YES | ||||||||||||||||||||
Source (natural) | Organism: ![]() | ||||||||||||||||||||
Buffer solution | pH: 7.5 | ||||||||||||||||||||
Buffer component |
| ||||||||||||||||||||
Specimen | Conc.: 2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||
Specimen support | Grid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil, UltrAuFoil, R1.2/1.3 | ||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K / Details: 5s blot time |
-
Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
---|---|
Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 165000 X / Calibrated magnification: 58906 X / Cs: 2.7 mm / C2 aperture diameter: 70 µm / Alignment procedure: COMA FREE |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Average exposure time: 10 sec. / Electron dose: 53 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Num. of grids imaged: 3 / Num. of real images: 24743 |
EM imaging optics | Energyfilter name: GIF Bioquantum / Energyfilter slit width: 20 eV |
Image scans | Sampling size: 5 µm / Movie frames/image: 40 / Used frames/image: 1-40 |
-
Processing
Software | Name: PHENIX / Version: 1.17_3643: / Classification: refinement | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
EM software |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 4114800 Details: 15,630 movies were selected because of the quality of their CTF fits. 4,114,800 coordinates were selected, leading to 466,632 particles which clustered into high-quality 2D class averages | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C2 (2 fold cyclic) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 149322 / Algorithm: FOURIER SPACE / Details: No data beyond 1/5 A-1 were used in refinement / Num. of class averages: 1 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | PDB-ID: 2OSL | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refine LS restraints |
|