7D8B

Engineering Disulphide-Free Autonomous Antibody VH Domains to modulate intracellular pathways


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.46 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.250 

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

Engineering an autonomous VH domain to modulate intracellular pathways and to interrogate the eIF4F complex.

Frosi, Y.Lin, Y.C.Shimin, J.Ramlan, S.R.Hew, K.Engman, A.H.Pillai, A.Yeung, K.Cheng, Y.X.Cornvik, T.Nordlund, P.Goh, M.Lama, D.Gates, Z.P.Verma, C.S.Thean, D.Lane, D.P.Asial, I.Brown, C.J.

(2022) Nat Commun 13: 4854-4854

  • DOI: https://doi.org/10.1038/s41467-022-32463-1
  • Primary Citation of Related Structures:  
    7D8B, 7XTP

  • PubMed Abstract: 

    An attractive approach to target intracellular macromolecular interfaces and to model putative drug interactions is to design small high-affinity proteins. Variable domains of the immunoglobulin heavy chain (VH domains) are ideal miniproteins, but their development has been restricted by poor intracellular stability and expression. Here we show that an autonomous and disufhide-free VH domain is suitable for intracellular studies and use it to construct a high-diversity phage display library. Using this library and affinity maturation techniques we identify VH domains with picomolar affinity against eIF4E, a protein commonly hyper-activated in cancer. We demonstrate that these molecules interact with eIF4E at the eIF4G binding site via a distinct structural pose. Intracellular overexpression of these miniproteins reduce cellular proliferation and expression of malignancy-related proteins in cancer cell lines. The linkage of high-diversity in vitro libraries with an intracellularly expressible miniprotein scaffold will facilitate the discovery of VH domains suitable for intracellular applications.


  • Organizational Affiliation

    p53 Laboratory (A*STAR), 8A Biomedical Grove, #06-04/05, Neuros/Immunos, 138648, Singapore.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Eukaryotic translation initiation factor 4E
A, C
217Homo sapiensMutation(s): 0 
Gene Names: EIF4EEIF4EL1EIF4F
UniProt & NIH Common Fund Data Resources
Find proteins for P06730 (Homo sapiens)
Explore P06730 
Go to UniProtKB:  P06730
PHAROS:  P06730
GTEx:  ENSG00000151247 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06730
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
VH-S4
B, D
161Homo sapiensMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.46 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.250 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.595α = 90
b = 140.394β = 104.037
c = 61.961γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-08-25
    Type: Initial release
  • Version 1.1: 2022-09-14
    Changes: Database references, Derived calculations
  • Version 1.2: 2023-11-29
    Changes: Data collection, Refinement description