8J6F

Cryo-EM structure of the Tocilizumab Fab/IL-6R complex

• PDB DOI: https://doi.org/10.2210/pdb8J6F/pdb
• EM Map EMD-36003: EMDB EMDataResource

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2023-04-25 Released: 2024-03-27 
• Deposition Author(s): She, J., Chen, L.
• Funding Organization(s): Ministry of Science and Technology (MoST, China)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.30 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structures of tocilizumab and sarilumab Fabs in complex with IL-6R

She, J., Wang, M.X.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - A1B1C1D1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 89.31 kDa 
• Atom Count: 3,870 
• Modelled Residue Count: 496 
• Deposited Residue Count: 815 
• Unique protein chains: 4

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Heavy chain of Tocilizumab Fab	A [auth H]	226	Homo sapiens	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Light chain of Tocilizumab Fab	B [auth L]	214	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Interleukin-6 receptor subunit alpha	C [auth I]	365	Homo sapiens	Mutation(s): 0  Gene Names: IL6R
UniProt & NIH Common Fund Data Resources
Find proteins for P08887 (Homo sapiens) Explore P08887  Go to UniProtKB:  P08887
PHAROS:  P08887 GTEx:  ENSG00000160712

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
IL6R-D2 peptide	D [auth B]	10	Homo sapiens	Mutation(s): 0  Gene Names: IL6R
UniProt & NIH Common Fund Data Resources
Find proteins for P08887 (Homo sapiens) Explore P08887  Go to UniProtKB:  P08887
PHAROS:  P08887 GTEx:  ENSG00000160712

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	E [auth I]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.30 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-03-27 
Deposition Author(s): She, J., Chen, L.

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Funding Organization	Location	Grant Number
Ministry of Science and Technology (MoST, China)	China	2021YFF0600800

Revision History  

• Version 1.0: 2024-03-27
  Type: Initial release