3X3G

Fab fragment from anti TRAIL-R2 Human Agonist Antibody KMTR2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.51 Å
  • R-Value Free: 
    0.224 (Depositor), 0.220 (DCC) 
  • R-Value Work: 
    0.186 (Depositor), 0.190 (DCC) 
  • R-Value Observed: 
    0.188 (Depositor) 

Starting Model: experimental
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Ligand Structure Quality Assessment 

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This is version 1.4 of the entry. See complete history


Literature

TRAIL-R2 Superoligomerization Induced by Human Monoclonal Agonistic Antibody KMTR2

Tamada, T.Shinmi, D.Ikeda, M.Yonezawa, Y.Kataoka, S.Kuroki, R.Mori, E.Motoki, K.

(2015) Sci Rep 5: 17936-17936

  • DOI: https://doi.org/10.1038/srep17936
  • Primary Citation of Related Structures:  
    3X3F, 3X3G

  • PubMed Abstract: 

    The fully human monoclonal antibody KMTR2 acts as a strong direct agonist for tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) receptor 2 (TRAIL-R2), which is capable of inducing apoptotic cell death without cross-linking. To investigate the mechanism of direct agonistic activity induced by KMTR2, the crystal structure of the extracellular region of TRAIL-R2 and a Fab fragment derived from KMTR2 (KMTR2-Fab) was determined to 2.1 Å resolution. Two KMTR2-Fabs assembled with the complementarity-determining region 2 of the light chain via two-fold crystallographic symmetry, suggesting that the KMTR2-Fab assembly tended to enhance TRAIL-R2 oligomerization. A single mutation at Asn53 to Arg located at the two-fold interface in the KMTR2 resulted in a loss of its apoptotic activity, although it retained its antigen-binding activity. These results indicate that the strong agonistic activity, such as apoptotic signaling and tumor regression, induced by KMTR2 is attributed to TRAIL-R2 superoligomerization induced by the interdimerization of KMTR2.


  • Organizational Affiliation

    Quantum Beam Science Center, Japan Atomic Energy Agency, 2-4, Shirakata, Tokai, Ibaraki 319-1195, Japan.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Heavy chain of KMTR2A [auth H]229Homo sapiensMutation(s): 0 
Entity Groups  
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Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Light chain of KMTR2B [auth L]214Homo sapiensMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.51 Å
  • R-Value Free:  0.224 (Depositor), 0.220 (DCC) 
  • R-Value Work:  0.186 (Depositor), 0.190 (DCC) 
  • R-Value Observed: 0.188 (Depositor) 
Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 153.001α = 90
b = 165.383β = 90
c = 65.297γ = 90
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted NAGClick on this verticalbar to view details

Entry History 

Deposition Data

  • Released Date: 2015-12-23 
  • Deposition Author(s): Tamada, T.

Revision History  (Full details and data files)

  • Version 1.0: 2015-12-23
    Type: Initial release
  • Version 1.1: 2018-10-17
    Changes: Data collection, Database references, Derived calculations
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.3: 2023-11-08
    Changes: Data collection, Database references, Refinement description, Structure summary
  • Version 1.4: 2024-11-13
    Changes: Structure summary