6Z0I

Structure of the TREM2 transmembrane helix in complex with DAP12 in DPC micelles


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

gamma-Secretase cleavage of the Alzheimer risk factor TREM2 is determined by its intrinsic structural dynamics.

Steiner, A.Schlepckow, K.Brunner, B.Steiner, H.Haass, C.Hagn, F.

(2020) EMBO J : e104247-e104247

  • DOI: 10.15252/embj.2019104247
  • Primary Citation of Related Structures:  
    6Z0G, 6Z0I, 6Z0H

  • PubMed Abstract: 
  • Sequence variants of the microglial expressed TREM2 (triggering receptor expressed on myeloid cells 2) are a major risk factor for late onset Alzheimer's disease. TREM2 requires a stable interaction with DAP12 in the membrane to initiate signaling, which is terminated by TREM2 ectodomain shedding and subsequent intramembrane cleavage by γ-secretase ...

    Sequence variants of the microglial expressed TREM2 (triggering receptor expressed on myeloid cells 2) are a major risk factor for late onset Alzheimer's disease. TREM2 requires a stable interaction with DAP12 in the membrane to initiate signaling, which is terminated by TREM2 ectodomain shedding and subsequent intramembrane cleavage by γ-secretase. To understand the structural basis for the specificity of the intramembrane cleavage event, we determined the solution structure of the TREM2 transmembrane helix (TMH). Caused by the presence of a charged amino acid in the membrane region, the TREM2-TMH adopts a kinked structure with increased flexibility. Charge removal leads to TMH stabilization and reduced dynamics, similar to its structure in complex with DAP12. Strikingly, these dynamical features match with the site of the initial γ-secretase cleavage event. These data suggest an unprecedented cleavage mechanism by γ-secretase where flexible TMH regions act as key determinants of substrate cleavage specificity.


    Organizational Affiliation

    Institute of Structural Biology, Helmholtz Zentrum München, Neuherberg, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Triggering receptor expressed on myeloid cells 2 A49Homo sapiensMutation(s): 0 
Gene Names: TREM2
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Intramembrane Proteases
Protein: 
γ-secretase substrate: TREM2 transmembrane helix in DPC micelles
Find proteins for Q9NZC2 (Homo sapiens)
Explore Q9NZC2 
Go to UniProtKB:  Q9NZC2
NIH Common Fund Data Resources
PHAROS:  Q9NZC2
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 6Z0I Olderado

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Helmholtz AssociationGermanyVG-NG-1039
European Communitys Seventh Framework ProgrammeEuropean Union291763

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-16
    Type: Initial release