7KPL

Crystal structure of hEphB1 in apo form

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.71 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.202 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Identification of tetracycline combinations as EphB1 tyrosine kinase inhibitors for treatment of neuropathic pain.

Ahmed, M.S., Wang, P., Nguyen, N.U.N., Nakada, Y., Menendez-Montes, I., Ismail, M., Bachoo, R., Henkemeyer, M., Sadek, H.A., Kandil, E.S.

(2021) Proc Natl Acad Sci U S A 118

  • DOI: 10.1073/pnas.2016265118
  • Primary Citation of Related Structures:  
    6UMW, 7KPL, 7KPM

  • PubMed Abstract: 

    • Previous studies have demonstrated that the synaptic EphB1 receptor tyrosine kinase is a major mediator of neuropathic pain, suggesting that targeting the activity of this receptor might be a viable therapeutic option. Therefore, we set out to determine if any FDA-approved drugs can act as inhibitors of the EphB1 intracellular catalytic domain ...

    Previous studies have demonstrated that the synaptic EphB1 receptor tyrosine kinase is a major mediator of neuropathic pain, suggesting that targeting the activity of this receptor might be a viable therapeutic option. Therefore, we set out to determine if any FDA-approved drugs can act as inhibitors of the EphB1 intracellular catalytic domain. An in silico screen was first used to identify a number of tetracycline antibiotics which demonstrated potential docking to the ATP-binding catalytic domain of EphB1. Kinase assays showed that demeclocycline, chlortetracycline, and minocycline inhibit EphB1 kinase activity at low micromolar concentrations. In addition, we cocrystallized chlortetracycline and EphB1 receptor, which confirmed its binding to the ATP-binding domain. Finally, in vivo administration of the three-tetracycline combination inhibited the phosphorylation of EphB1 in the brain, spinal cord, and dorsal root ganglion (DRG) and effectively blocked neuropathic pain in mice. These results indicate that demeclocycline, chlortetracycline, and minocycline can be repurposed for treatment of neuropathic pain and potentially for other indications that would benefit from inhibition of EphB1 receptor kinase activity.

    Organizational Affiliation: 

    Department of Anesthesiology, University of Texas Southwestern Medical Center, Dallas, TX 75390 hesham.sadek@utsouthwestern.edu enas.kandil@utsouthwestern.edu.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ephrin type-B receptor 1A279Homo sapiensMutation(s): 0 
Gene Names: EPHB1, ELK, EPHT2, HEK6, NET
EC: 2.7.10.1
UniProt & NIH Common Fund Data Resources
Find proteins for P54762 (Homo sapiens)
Explore P54762 
Go to UniProtKB:  P54762
PHAROS:  P54762
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP54762
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR		A L-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.71 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.202 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.057α = 90
b = 91.461β = 90
c = 97.436γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-3000data reduction
HKL-3000data scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-03-10
    Type: Initial release
  • Version 1.1: 2022-03-23
    Changes: Author supporting evidence, Database references