4N0F

Human FcRn complexed with human serum albumin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.02 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Insights into Neonatal Fc Receptor-based Recycling Mechanisms.

Oganesyan, V.Damschroder, M.M.Cook, K.E.Li, Q.Gao, C.Wu, H.Dall'acqua, W.F.

(2014) J.Biol.Chem. 289: 7812-7824

  • DOI: 10.1074/jbc.M113.537563
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We report the three-dimensional structure of human neonatal Fc receptor (FcRn) bound concurrently to its two known ligands. More particularly, we solved the crystal structure of the complex between human FcRn, wild-type human serum albumin (HSA), and ...

    We report the three-dimensional structure of human neonatal Fc receptor (FcRn) bound concurrently to its two known ligands. More particularly, we solved the crystal structure of the complex between human FcRn, wild-type human serum albumin (HSA), and a human Fc engineered for improved pharmacokinetics properties (Fc-YTE). The crystal structure of human FcRn bound to wild-type HSA alone is also presented. HSA domain III exhibits an extensive interface of contact with FcRn, whereas domain I plays a lesser role. A molecular explanation for the HSA recycling mechanism is provided with the identification of FcRn His(161) as the only potential direct contributor to the corresponding pH-dependent process. At last, this study also allows an accurate structural definition of residues considered for decades as important to the human IgG/FcRn interaction and reveals Fc His(310) as a significant contributor to pH-dependent binding. Finally, we explain various structural mechanisms by which several Fc mutations (including YTE) result in increased human IgG binding to FcRn. Our study provides an unprecedented relevant understanding of the molecular basis of human Fc interaction with human FcRn.


    Organizational Affiliation

    From the Department of Antibody Discovery and Protein Engineering, MedImmune, Gaithersburg, Maryland 20878.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IgG receptor FcRn large subunit p51
A, E, H, K
271Homo sapiensMutation(s): 0 
Gene Names: FCGRT (FCRN)
Find proteins for P55899 (Homo sapiens)
Go to Gene View: FCGRT
Go to UniProtKB:  P55899
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B, F, I, L
99Homo sapiensMutation(s): 0 
Gene Names: B2M
Find proteins for P61769 (Homo sapiens)
Go to Gene View: B2M
Go to UniProtKB:  P61769
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Serum albumin
D, G, J, M
585Homo sapiensMutation(s): 0 
Gene Names: ALB
Find proteins for P02768 (Homo sapiens)
Go to Gene View: ALB
Go to UniProtKB:  P02768
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.02 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.223 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 136.469α = 90.00
b = 115.925β = 104.47
c = 186.237γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
MOLREPphasing
SCALEPACKdata scaling
HKL-2000data reduction
PROTEUM PLUSdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-02-05
    Type: Initial release
  • Version 1.1: 2014-04-02
    Type: Database references
  • Version 1.2: 2014-04-09
    Type: Other