5SX4

Crystal Structure of panitumumab in complex with epidermal growth factor receptor domain 3.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.226 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

The Panitumumab EGFR Complex Reveals a Binding Mechanism That Overcomes Cetuximab Induced Resistance.

Sickmier, E.A., Kurzeja, R.J., Michelsen, K., Vazir, M., Yang, E., Tasker, A.S.

(2016) PLoS One 11: e0163366-e0163366

  • DOI: https://doi.org/10.1371/journal.pone.0163366
  • Primary Citation of Related Structures:  
    5SX4, 5SX5

  • PubMed Abstract: 

    Panitumumab and cetuximab target the epidermal growth factor receptor for the treatment of metastatic colorectal cancer. These therapies provide a significant survival benefit to patients with metastatic colorectal cancer with wild-type RAS. A single point mutation in the ectodomain of EGFR (S468R) confers acquired or secondary resistance in cetuximab treated patients, which is not observed in panitumumab-treated patients. Structural and biophysical studies presented here show this mutation directly blocks cetuximab binding to EGFR domain III and describes a unique mechanism by which panitumumab uses a central cavity to accommodate this mutation.

    • Organizational Affiliation: 

    Depatment of Therapeutic Discovery, Amgen Inc., 360 Binney Street, Cambridge, MA 02142, United States of America.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Panitumumab Fab Light ChainA [auth I],
C [auth L]		214Homo sapiensMutation(s): 0 
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Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Panitumumab Fab Heavy ChainB [auth J],
D [auth H]		221Homo sapiensMutation(s): 0 
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Epidermal growth factor receptorE [auth M],
F [auth N]		201Homo sapiensMutation(s): 0 
Gene Names: EGFR, ERBB, ERBB1, 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
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
1PE
Query on 1PE
Download Ideal Coordinates CCD File 
K [auth J],
P [auth H]		PENTAETHYLENE GLYCOL
C10 H22 O6
JLFNLZLINWHATN-UHFFFAOYSA-N
SO4
Query on SO4
Download Ideal Coordinates CCD File 
G [auth I]
H [auth I]
I
L
M [auth L]
G [auth I],
H [auth I],
I,
L,
M [auth L],
N [auth L],
O [auth L],
R [auth N]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
GOL
Query on GOL
Download Ideal Coordinates CCD File 
J [auth I]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
EDO
Query on EDO
Download Ideal Coordinates CCD File 
Q [auth H]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.226 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.273α = 90
b = 113.184β = 90
c = 232.443γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-10-05
    Type: Initial release
  • Version 1.1: 2023-10-04
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 1.2: 2024-10-16
    Changes: Structure summary