9RKD | pdb_00009rkd

Insulin receptor ectodomain in apo-conformation

• PDB DOI: https://doi.org/10.2210/pdb9RKD/pdb
• EM Map EMD-54015: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2025-06-13 Released: 2026-06-24 
• Deposition Author(s): Polak, M., Novacek, J., Jiracek, J.
• Funding Organization(s): Ministry of Education, Youth and Sports of the Czech Republic

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 6.00 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Antagonistic insulin mimetics lock the insulin receptor in an alternative apo-state

Polak, M., Pinkas, M., Hernandez, M.S.G., Fabre, B., Lubos, M., Zakova, L., Grzybek, M., Schaefer, I.B., Coskun, U., Jiracek, J., Novacek, J.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 201.96 kDa 
• Atom Count: 11,532 
• Modeled Residue Count: 1,426 
• Deposited Residue Count: 1,760 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Isoform Short of Insulin receptor	A, C	718	Homo sapiens	Mutation(s): 0  Gene Names: INSR EC: 2.7.10.1
UniProt & NIH Common Fund Data Resources
Find proteins for P06213 (Homo sapiens) Go to UniProtKB:  P06213
PHAROS:  P06213 GTEx:  ENSG00000171105

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Insulin receptor	B, D	162	Homo sapiens	Mutation(s): 0  Gene Names: INSR EC: 2.7.10.1
UniProt & NIH Common Fund Data Resources
Find proteins for P06213 (Homo sapiens) Go to UniProtKB:  P06213
PHAROS:  P06213 GTEx:  ENSG00000171105

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 6.00 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	RELION	5.0

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-06-24 
Deposition Author(s): Polak, M., Novacek, J., Jiracek, J.

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Funding Organization	Location	Grant Number
Ministry of Education, Youth and Sports of the Czech Republic	Czech Republic	LM2023042
Ministry of Education, Youth and Sports of the Czech Republic	Czech Republic	LX22NPO5104

Revision History  

• Version 1.0: 2026-06-24
  Type: Initial release