4KI1

Primitive triclinic crystal form of the human IgE-Fc(epsilon)3-4 bound to its B cell receptor derCD23

• PDB DOI: https://doi.org/10.2210/pdb4KI1/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Homo sapiens, Escherichia coli
• Mutation(s): Yes 


• Deposited: 2013-05-01 Released: 2014-03-05 
• Deposition Author(s): Dhaliwal, B., Pang, M.O.Y., Sutton, B.J., Beavil, A.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.266 
• R-Value Work: 0.233 
• R-Value Observed: 0.234 

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 167.98 kDa 
• Atom Count: 11,133 
• Modelled Residue Count: 1,366 
• Deposited Residue Count: 1,464 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
IG EPSILON CHAIN C REGION	A, B, C, D	223	Homo sapiens	Mutation(s): 2  Gene Names: IGHE
UniProt & NIH Common Fund Data Resources
Find proteins for P01854 (Homo sapiens) Explore P01854  Go to UniProtKB:  P01854
PHAROS:  P01854 GTEx:  ENSG00000211891

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
LOW AFFINITY IMMUNOGLOBULIN EPSILON FC RECEPTOR	E, F, G, H	143	Homo sapiens	Mutation(s): 0  Gene Names: FCER2, CD23A, CLEC4J, FCE2, IGEBF
UniProt & NIH Common Fund Data Resources
Find proteins for P06734 (Homo sapiens) Explore P06734  Go to UniProtKB:  P06734
PHAROS:  P06734 GTEx:  ENSG00000104921

Oligosaccharides

Help

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	I, J, K, L	5		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G22768VO GlyCosmos:  G22768VO GlyGen:  G22768VO

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.266 
• R-Value Work: 0.233 
• R-Value Observed: 0.234 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 48.79	α = 100.67
b = 63.84	β = 90.13
c = 163.89	γ = 103.49

Software Package:

Software Name	Purpose
MOSFLM	data reduction
PHASES	phasing
BUSTER	refinement
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-03-05 
Deposition Author(s): Dhaliwal, B., Pang, M.O.Y., Sutton, B.J., Beavil, A.J.

Revision History  

• Version 1.0: 2014-03-05
  Type: Initial release
  
• Version 1.1: 2014-03-12
  Changes: Database references
• Version 1.2: 2014-09-24
  Changes: Database references
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Atomic model, Data collection, Database references, Derived calculations, Structure summary
• Version 2.1: 2023-09-20
  Changes: Data collection, Database references, Refinement description, Structure summary