6A9X

Crystal Structure of AnkG/GABARAP Complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 

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Literature

Ankyrin-G regulates forebrain connectivity and network synchronization via interaction with GABARAP.

Nelson, A.D., Caballero-Floran, R.N., Rodriguez Diaz, J.C., Hull, J.M., Yuan, Y., Li, J., Chen, K., Walder, K.K., Lopez-Santiago, L.F., Bennett, V., McInnis, M.G., Isom, L.L., Wang, C., Zhang, M., Jones, K.S., Jenkins, P.M.

(2018) Mol Psychiatry 

  • DOI: 10.1038/s41380-018-0308-x
  • Primary Citation of Related Structures:  
    6A9X

  • PubMed Abstract: 

    • GABAergic circuits are critical for the synchronization and higher order function of brain networks. Defects in this circuitry are linked to neuropsychiatric diseases, including bipolar disorder, schizophrenia, and autism. Work in cultured neurons ha ...

    GABAergic circuits are critical for the synchronization and higher order function of brain networks. Defects in this circuitry are linked to neuropsychiatric diseases, including bipolar disorder, schizophrenia, and autism. Work in cultured neurons has shown that ankyrin-G plays a key role in the regulation of GABAergic synapses on the axon initial segment and somatodendritic domain of pyramidal neurons, where it interacts directly with the GABA A receptor-associated protein (GABARAP) to stabilize cell surface GABA A receptors. Here, we generated a knock-in mouse model expressing a mutation that abolishes the ankyrin-G/GABARAP interaction (Ank3 W1989R) to understand how ankyrin-G and GABARAP regulate GABAergic circuitry in vivo. We found that Ank3 W1989R mice exhibit a striking reduction in forebrain GABAergic synapses resulting in pyramidal cell hyperexcitability and disruptions in network synchronization. In addition, we identified changes in pyramidal cell dendritic spines and axon initial segments consistent with compensation for hyperexcitability. Finally, we identified the ANK3 W1989R variant in a family with bipolar disorder, suggesting a potential role of this variant in disease. Our results highlight the importance of ankyrin-G in regulating forebrain circuitry and provide novel insights into how ANK3 loss-of-function variants may contribute to human disease.

    Organizational Affiliation: 

    Department of Psychiatry, University of Michigan, Ann Arbor, MI, 48109, USA. pjenkins@umich.edu.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-aminobutyric acid receptor-associated proteinD117Mus musculusMutation(s): 0 
Gene Names: Gabarap
Find proteins for Q9DCD6 (Mus musculus)
Explore Q9DCD6 
Go to UniProtKB:  Q9DCD6
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Ankyrin-3A24Rattus norvegicusMutation(s): 0 
Gene Names: Ank3
Find proteins for O70511 (Rattus norvegicus)
Explore O70511 
Go to UniProtKB:  O70511
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 
  • Space Group: I 2 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.991α = 90
b = 96.991β = 90
c = 96.991γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Research Grants CouncilHong KongAoE-M09-12

Revision History 

  • Version 1.0: 2018-12-26
    Type: Initial release