AP01 - a redesigned transferrin receptor apical domain

Experimental Data Snapshot

  • Resolution: 1.98 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.238 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Computational backbone design enables soluble engineering of transferrin receptor apical domain.

Sjostrom, D.J.Berger, S.A.Oberdorfer, G.Bjelic, S.

(2020) Proteins 88: 1569-1577

  • DOI: https://doi.org/10.1002/prot.25974
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Supply of iron into human cells is achieved by iron carrier protein transferrin and its receptor that upon complex formation get internalized by endocytosis. Similarly, the iron needs to be delivered into the brain, and necessitates the transport across the blood-brain barrier. While there are still unanswered questions about these mechanisms, extensive efforts have been made to use the system for delivery of therapeutics into biological compartments. The dimeric form of the receptor, where each subunit consists of three domains, further complicates the detailed investigation of molecular determinants responsible for guiding the receptor interactions with other proteins. Especially the apical domain's biological function has been elusive. To further the study of transferrin receptor, we have computationally decoupled the apical domain for soluble expression, and validated the design strategy by structure determination. Besides presenting a methodology for solubilizing domains, the results will allow for study of apical domain's function.

  • Organizational Affiliation

    Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transferrin receptor protein 1
A, B
168Homo sapiensMutation(s): 7 
Gene Names: TFRC
UniProt & NIH Common Fund Data Resources
Find proteins for P02786 (Homo sapiens)
Explore P02786 
Go to UniProtKB:  P02786
PHAROS:  P02786
GTEx:  ENSG00000072274 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02786
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.98 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.238 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.122α = 90
b = 119.558β = 112.249
c = 33.167γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Austrian Science FundAustriaP30826

Revision History  (Full details and data files)

  • Version 1.0: 2020-07-22
    Type: Initial release
  • Version 1.1: 2020-11-18
    Changes: Database references, Derived calculations
  • Version 1.2: 2021-01-13
    Changes: Structure summary