1K37

NMR Structure of human Epiregulin

• PDB DOI: https://doi.org/10.2210/pdb1K37/pdb
• BMRB: 5173

• Classification: HORMONE/GROWTH FACTOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2001-10-02 Released: 2003-09-30 
• Deposition Author(s): Sato, K., Miura, K., Tada, M., Aizawa, T., Miyamoto, K., Kawano, K.

---

Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 1 
• Selection Criteria: structures with the lowest energy 

Literature

Solution structure of epiregulin and the effect of its C-terminal domain for receptor binding affinity

Sato, K., Nakamura, T., Mizuguchi, M., Miura, K., Tada, M., Aizawa, T., Gomi, T., Miyamoto, K., Kawano, K.

(2003) FEBS Lett 553: 232-238

• PubMed: 14572630 
• DOI: https://doi.org/10.1016/s0014-5793(03)01005-6
• Primary Citation of Related Structures:  
  1K36, 1K37


• PubMed Abstract: 
  

  Epiregulin (EPR), a novel member of epidermal growth factor (EGF) family, is a ligand for ErbB-1 and ErbB-4 receptors. The binding affinity of EPR for the receptors is lower than those of other EGF-family ligands. The solution structure of EPR was determined using two-dimensional nuclear magnetic resonance spectroscopy. The secondary structure in the C-terminal domain of EPR is different from other EGF-family ligands because of the lack of hydrogen bonds. The structural difference in the C-terminal domain may provide an explanation for the reduced binding affinity of EPR to the ErbB receptors.

---

Organizational Affiliation: 

Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University, 2630 Sugitani, 930-0194 Toyama, Japan.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 5.28 kDa 
• Atom Count: 364 
• Modelled Residue Count: 46 
• Deposited Residue Count: 46 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Epiregulin	A	46	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for O14944 (Homo sapiens) Explore O14944  Go to UniProtKB:  O14944
PHAROS:  O14944 GTEx:  ENSG00000124882

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 1 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Currently 1K37 does not have a validation slider image.

Entry History 

Deposition Data

• Released Date: 2003-09-30 
Deposition Author(s): Sato, K., Miura, K., Tada, M., Aizawa, T., Miyamoto, K., Kawano, K.

Revision History  

• Version 1.0: 2003-09-30
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-02-23
  Changes: Database references, Derived calculations
• Version 1.4: 2024-10-23
  Changes: Data collection, Structure summary