3FRU

NEONATAL FC RECEPTOR, PH 6.5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.232 

wwPDB Validation   3D Report Full Report



Literature

Structural basis of pH-dependent antibody binding by the neonatal Fc receptor.

Vaughn, D.E.Bjorkman, P.J.

(1998) Structure 6: 63-73

  • DOI: 10.1016/s0969-2126(98)00008-2
  • Primary Citation of Related Structures:  
    3FRU

  • PubMed Abstract: 
  • The neonatal Fc receptor (FcRn) mediates the transcytosis of maternal immunoglobulin G (IgG) across fetal and/or neonatal tissues for the acquisition of passive immunity. In adults, FcRn is involved in the maintenance of high serum IgG levels. Both p ...

    The neonatal Fc receptor (FcRn) mediates the transcytosis of maternal immunoglobulin G (IgG) across fetal and/or neonatal tissues for the acquisition of passive immunity. In adults, FcRn is involved in the maintenance of high serum IgG levels. Both processes are mediated by pH-dependent IgG binding to FcRn-FcRn binds to IgG with nanomolar affinity at pH 6, but shows no detectable binding at pH 7.5. At pH 6, FcRn is more thermally stable and the dissociation rate of its light chain is an order of magnitude slower than at pH 8.0. Comparison of the structures of FcRn at pH 6.5 and pH 8 allows an analysis of the structural basis for the receptor's pH-dependent ligand binding and stability.


    Related Citations: 
    • Crystal Structure at 2.2 A Resolution of the Mhc-Related Neonatal Fc Receptor
      Burmeister, W.P., Gastinel, L.N., Simister, N.E., Blum, M.L., Bjorkman, P.J.
      (1994) Nature 372: 336

    Organizational Affiliation

    Division of Biology, California Institute of Technology, Pasadena 91125, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NEONATAL FC RECEPTORACE269Rattus norvegicusMutation(s): 0 
Gene Names: GLUTAMINE SYNTHETASE SELECTIONFcgrtFcrn
Find proteins for P13599 (Rattus norvegicus)
Explore P13599 
Go to UniProtKB:  P13599
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BETA-2-MICROGLOBULINBDF99Rattus norvegicusMutation(s): 0 
Gene Names: GLUTAMINE SYNTHETASE SELECTIONB2m
Find proteins for P07151 (Rattus norvegicus)
Explore P07151 
Go to UniProtKB:  P07151
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-alpha-D-glucopyranose-(1-4)-[beta-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose
G
7 N-Glycosylation Oligosaccharides Interaction
Entity ID: 4
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-alpha-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose
H
7 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.232 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 126.5α = 90
b = 191.7β = 90
c = 149.6γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
CCP4data reduction
CCP4model building
CNSrefinement
CCP4data scaling
CCP4phasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-06-10
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary