4N0U

Ternary complex between Neonatal Fc receptor, serum albumin and Fc


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.80 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.282 
  • R-Value Observed: 0.282 

wwPDB Validation   3D Report Full Report


This is version 2.0 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: https://doi.org/10.1074/jbc.M113.537563
  • Primary Citation of Related Structures:  
    4N0F, 4N0U

  • 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 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
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
IgG receptor FcRn large subunit p51264Homo sapiensMutation(s): 0 
Gene Names: FCGRTFCRN
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Find proteins for P55899 (Homo sapiens)
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Go to UniProtKB:  P55899
PHAROS:  P55899
GTEx:  ENSG00000104870 
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UniProt GroupP55899
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-2-microglobulin99Homo sapiensMutation(s): 0 
Gene Names: B2MCDABP0092HDCMA22P
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Find proteins for P61769 (Homo sapiens)
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Go to UniProtKB:  P61769
PHAROS:  P61769
GTEx:  ENSG00000166710 
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UniProt GroupP61769
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Serum albuminC [auth D]583Homo sapiensMutation(s): 0 
Gene Names: ALBGIG20GIG42PRO0903PRO1708PRO2044PRO2619PRO2675UNQ696/PRO1341
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Find proteins for P02768 (Homo sapiens)
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Go to UniProtKB:  P02768
PHAROS:  P02768
GTEx:  ENSG00000163631 
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UniProt GroupP02768
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Ig gamma-1 chain C regionD [auth E]209Homo sapiensMutation(s): 3 
Gene Names: IGHG1
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Find proteins for P01857 (Homo sapiens)
Explore P01857 
Go to UniProtKB:  P01857
PHAROS:  P01857
GTEx:  ENSG00000211896 
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UniProt GroupP01857
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Oligosaccharides

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Entity ID: 5
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[beta-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranoseE [auth C]8N-Glycosylation
Glycosylation Resources
GlyTouCan:  G59451NL
GlyCosmos:  G59451NL
GlyGen:  G59451NL
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.80 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.282 
  • R-Value Observed: 0.282 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 153.19α = 90
b = 153.19β = 90
c = 145.998γ = 90
Software Package:
Software NamePurpose
PROTEUM PLUSdata collection
PHASERphasing
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-02-05
    Type: Initial release
  • Version 1.1: 2014-04-02
    Changes: Database references
  • Version 1.2: 2020-02-05
    Changes: Data collection, Database references, Derived calculations
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary