Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 77.39 kDa 
• Atom Count: 5251 
• Modelled Residue Count: 606 
• Deposited Residue Count: 620 
• Unique protein chains: 2

1F6A

Structure of the human ige-fc bound to its high affinity receptor fc(epsilon)ri(alpha)

• DOI: 10.2210/pdb1F6A/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Mutation(s): Yes 


• Deposited: 2000-06-20 Released: 2000-07-20 
• Deposition Author(s): Garman, S.C., Wurzburg, B.A., Tarchevskaya, S.S., Kinet, J.P., Jardetzky, T.S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.50 Å
• R-Value Free: 0.273 
• R-Value Work: 0.254 
• R-Value Observed: 0.254 

Literature

Structure of the Fc fragment of human IgE bound to its high-affinity receptor Fc (epsilon) RI (alpha).

Garman, S.C., Wurzburg, B.A., Tarchevskaya, S.S., Kinet, J.P., Jardetzky, T.S.

(2000) Nature 406: 259-266

• PubMed: 10917520 
• DOI: 10.1038/35018500
• Primary Citation of Related Structures:  
  1F6A


• PubMed Abstract: 
  

The initiation of immunoglobulin-E (IgE)-mediated allergic responses requires the binding of IgE antibody to its high-affinity receptor, Fc epsilonRI. Crosslinking of Fc epsilonRI initiates an intracellular signal transduction cascade that triggers the release of mediators of the allergic response. The interaction of the crystallizable fragment (Fc) of IgE (IgE-Fc) with Fc epsilonRI is a key recognition event of this process and involves the extracellular domains of the Fc epsilonRI alpha-chain. To understand the structural basis for this interaction, we have solved the crystal structure of the human IgE-Fc-Fc epsilonRI alpha complex to 3.5-A resolution. The crystal structure reveals that one receptor binds one dimeric IgE-Fc molecule asymmetrically through interactions at two sites, each involving one C epsilon3 domain of the IgE-Fc. The interaction of one receptor with the IgE-Fc blocks the binding of a second receptor, and features of this interaction are conserved in other members of the Fc receptor family. The structure suggests new approaches to inhibiting the binding of IgE to Fc epsilonRI for the treatment of allergy and asthma.

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Organizational Affiliation: 

Department of Biochemistry, Molecular Biology and Cell Biology, Northwestern University, Evanston, Illinois 60208, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HIGH AFFINITY IMMUNOGLOBULIN EPSILON RECEPTOR ALPHA-SUBUNIT	A	176	Homo sapiens	Mutation(s): 3  Gene Names: FCER1A, FCE1A
Find proteins for P12319 (Homo sapiens) Explore P12319  Go to UniProtKB:  P12319
NIH Common Fund Data Resources
PHAROS:  P12319 GTEx:  ENSG00000179639

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
IG EPSILON CHAIN C REGION	B, C [auth D]	222	Homo sapiens	Mutation(s): 0  Gene Names: IGHE
Find proteins for P01854 (Homo sapiens) Explore P01854  Go to UniProtKB:  P01854
NIH Common Fund Data Resources
PHAROS:  P01854 GTEx:  ENSG00000211891

Oligosaccharides

Help

Entity ID: 3
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
alpha-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	D [auth C]	4		N-Glycosylation

Entity ID: 4
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	E	5		N-Glycosylation

Entity ID: 5
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose	F	3		N-Glycosylation

Entity ID: 6
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	G	6		N-Glycosylation

Entity ID: 7
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	H	3		N-Glycosylation

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CPS	J [auth A], K [auth A], P [auth D], Q [auth D], R [auth D]	3-[(3-CHOLAMIDOPROPYL)DIMETHYLAMMONIO]-1-PROPANESULFONATE C32 H58 N2 O7 S UMCMPZBLKLEWAF-BCTGSCMUSA-N
SO4	I [auth A], L [auth B], M [auth B], N [auth B], O [auth D]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.50 Å
• R-Value Free: 0.273 
• R-Value Work: 0.254 
• R-Value Observed: 0.254 
• Space Group: H 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 192.8	α = 90
b = 192.8	β = 90
c = 302.4	γ = 120

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-06-20 
• Released Date: 2000-07-20 
Deposition Author(s): Garman, S.C., Wurzburg, B.A., Tarchevskaya, S.S., Kinet, J.P., Jardetzky, T.S.

Revision History  

• Version 1.0: 2000-07-20
  Type: Initial release
  
• Version 1.1: 2008-04-27
  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: Advisory, Atomic model, Data collection, Database references, Derived calculations, Structure summary