3B2U

Crystal structure of isolated domain III of the extracellular region of the epidermal growth factor receptor in complex with the Fab fragment of IMC-11F8

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.58 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.230 

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This is version 2.0 of the entry. See complete history. 


Literature

Structural basis for EGF receptor inhibition by the therapeutic antibody IMC-11F8.

Li, S., Kussie, P., Ferguson, K.M.

(2008) Structure 16: 216-227

  • DOI: 10.1016/j.str.2007.11.009
  • Primary Citation of Related Structures:  
    3B2U, 3B2V

  • PubMed Abstract: 

    • Therapeutic anticancer strategies that target and inactivate the epidermal growth factor receptor (EGFR) are under intense study in the clinic. Here we describe the mechanism of EGFR inhibition by an antibody drug IMC-11F8. IMC-11F8 is a fully human antibody that has similar antitumor potency as the chimeric cetuximab/Erbitux and might represent a safer therapeutic alternative ...

    Therapeutic anticancer strategies that target and inactivate the epidermal growth factor receptor (EGFR) are under intense study in the clinic. Here we describe the mechanism of EGFR inhibition by an antibody drug IMC-11F8. IMC-11F8 is a fully human antibody that has similar antitumor potency as the chimeric cetuximab/Erbitux and might represent a safer therapeutic alternative. We report the X-ray crystal structure of the Fab fragment of IMC-11F8 (Fab11F8) in complex with the entire extracellular region and with isolated domain III of EGFR. We compare this to our previous study of the cetuximab/EGFR interaction. Fab11F8 interacts with a remarkably similar epitope, but through a completely different set of interactions. Both the similarities and differences in binding of these two antibodies have important implications for the development of inhibitors that could exploit this same mechanism of EGFR inhibition.

    Organizational Affiliation: 

    Department of Physiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
IMC-11F8 Fab Light chain213Homo sapiensMutation(s): 0 
Gene Names: EGFR
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
IMC-11F8 Fab Heavy chain223Homo sapiensMutation(s): 0 
Gene Names: IGH@
UniProt
Find proteins for Q6GMX6 (Homo sapiens)
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Go to UniProtKB:  Q6GMX6
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UniProt GroupQ6GMX6
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Epidermal growth factor receptor214Homo sapiensMutation(s): 0 
Gene Names: EGFR, ERBB1, ERBB, HER1
EC: 2.7.10.1
UniProt & NIH Common Fund Data Resources
Find proteins for P00533 (Homo sapiens)
Explore P00533 
Go to UniProtKB:  P00533
PHAROS:  P00533
GTEx:  ENSG00000146648 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00533
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  • Reference Sequence
Oligosaccharides

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Entity ID: 4
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseCA [auth c],
EA [auth e],
Y		4N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G81315DD
GlyCosmos:  G81315DD
GlyGen:  G81315DD
Entity ID: 5
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
BA [auth b],
DA [auth d],
GA [auth g],
LA [auth l],
NA [auth n],
BA [auth b],
DA [auth d],
GA [auth g],
LA [auth l],
NA [auth n],
PA [auth p],
Z
2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Entity ID: 6
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
AA [auth a],
FA [auth f],
IA [auth i],
JA [auth j],
KA [auth k],
AA [auth a],
FA [auth f],
IA [auth i],
JA [auth j],
KA [auth k],
MA [auth m],
OA [auth o]
3N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G15407YE
GlyCosmos:  G15407YE
GlyGen:  G15407YE
Entity ID: 7
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseHA [auth h]5N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G78750JU
GlyCosmos:  G78750JU
GlyGen:  G78750JU
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG
Download Ideal Coordinates CCD File 
AB [auth I],
CB [auth M],
DB [auth P],
EB [auth P],
GB [auth S],
AB [auth I],
CB [auth M],
DB [auth P],
EB [auth P],
GB [auth S],
HB [auth S],
JB [auth V],
KB [auth V],
QA [auth A],
RA [auth A],
TA [auth B],
UA [auth B],
WA [auth E],
XA [auth E]
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N		 Ligand Interaction
SO4
Query on SO4
Download Ideal Coordinates CCD File 
BB [auth O],
FB [auth U],
IB [auth X],
LB [auth V],
SA [auth A],
BB [auth O],
FB [auth U],
IB [auth X],
LB [auth V],
SA [auth A],
VA [auth G],
YA [auth E],
ZA [auth K]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.58 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.230 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 154.373α = 90
b = 139.122β = 90.02
c = 175.325γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
DMphasing
REFMACrefinement
PDB_EXTRACTdata extraction
ADSCdata collection

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-02-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Advisory, Refinement description
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Structure summary