6I0Q

Crystal structure of BTB domain of KCTD16 hexamer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.189 

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

Targeting the gamma-Aminobutyric Acid Type B (GABAB) Receptor Complex: Development of Inhibitors Targeting the K+Channel Tetramerization Domain (KCTD) Containing Proteins/GABABReceptor Protein-Protein Interaction.

Sereikaite, V.Fritzius, T.Kasaragod, V.B.Bader, N.Maric, H.M.Schindelin, H.Bettler, B.Stromgaard, K.

(2019) J Med Chem 62: 8819-8830

  • DOI: https://doi.org/10.1021/acs.jmedchem.9b01087
  • Primary Citation of Related Structures:  
    6I0Q

  • PubMed Abstract: 

    Targeting multiprotein receptor complexes, rather than receptors directly, is a promising concept in drug discovery. This is particularly relevant to the GABA B receptor complex, which plays a prominent role in many brain functions and diseases. Here, we provide the first studies targeting a key protein-protein interaction of the GABA B receptor complex-the interaction with KCTD proteins. By employing the μSPOT technology, we first defined the GABA B receptor-binding epitope mediating the KCTD interaction. Subsequently, we developed a highly potent peptide-based inhibitor that interferes with the KCTD/GABA B receptor complex and efficiently isolates endogenous KCTD proteins from mouse brain lysates. X-ray crystallography and SEC-MALS revealed inhibitor induced oligomerization of KCTD16 into a distinct hexameric structure. Thus, we provide a template for modulating the GABA B receptor complex, revealing a fundamentally novel approach for targeting GABA B receptor-associated neuropsychiatric disorders.


  • Organizational Affiliation

    Center for Biopharmaceuticals, Department of Drug Design and Pharmacology , University of Copenhagen , 2100 Copenhagen , Denmark.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
BTB/POZ domain-containing protein KCTD16103Homo sapiensMutation(s): 0 
Gene Names: KCTD16KIAA1317
UniProt & NIH Common Fund Data Resources
Find proteins for Q68DU8 (Homo sapiens)
Explore Q68DU8 
Go to UniProtKB:  Q68DU8
PHAROS:  Q68DU8
GTEx:  ENSG00000183775 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ68DU8
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.189 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.407α = 90
b = 62.407β = 90
c = 41.861γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research FoundationGermanySchi 425/8-2

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-02
    Type: Initial release
  • Version 1.1: 2019-10-23
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-24
    Changes: Data collection, Database references, Refinement description