The Rigid-body refined model of the normal Huntingtin.

Experimental Data Snapshot

  • Resolution: 9.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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The Polyglutamine Expansion at the N-Terminal of Huntingtin Protein Modulates the Dynamic Configuration and Phosphorylation of the C-Terminal HEAT Domain.

Jung, T.Shin, B.Tamo, G.Kim, H.Vijayvargia, R.Leitner, A.Marcaida, M.J.Astorga-Wells, J.Jung, R.Aebersold, R.Peraro, M.D.Hebert, H.Seong, I.S.Song, J.J.

(2020) Structure 28: 1035-1050.e8

  • DOI: https://doi.org/10.1016/j.str.2020.06.008
  • Primary Citation of Related Structures:  
    6RMH, 6YEJ

  • PubMed Abstract: 

    The polyQ expansion in huntingtin protein (HTT) is the prime cause of Huntington's disease (HD). The recent cryoelectron microscopy (cryo-EM) structure of HTT-HAP40 complex provided the structural information on its HEAT-repeat domains. Here, we present analyses of the impact of polyQ length on the structure and function of HTT via an integrative structural and biochemical approach. The cryo-EM analysis of normal (Q23) and disease (Q78) type HTTs shows that the structures of apo HTTs significantly differ from the structure of HTT in a HAP40 complex and that the polyQ expansion induces global structural changes in the relative movements among the HTT domains. In addition, we show that the polyQ expansion alters the phosphorylation pattern across HTT and that Ser2116 phosphorylation in turn affects the global structure and function of HTT. These results provide a molecular basis for the effect of the polyQ segment on HTT structure and activity, which may be important for HTT pathology.

  • Organizational Affiliation

    Department of Biology, Institute of Molecular Systems Biology, ETH Zürich, 8093 Zürich, Switzerland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Huntingtin3,142Homo sapiensMutation(s): 0 
Gene Names: HTTHDIT15
UniProt & NIH Common Fund Data Resources
Find proteins for P42858 (Homo sapiens)
Explore P42858 
Go to UniProtKB:  P42858
PHAROS:  P42858
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP42858
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 9.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Research Foundation (NRF, Korea)Korea, Republic Of2016-K1A1A2912057
National Research Foundation (NRF, Korea)Korea, Republic Of2016R1A2B3006293

Revision History  (Full details and data files)

  • Version 1.0: 2020-06-03
    Type: Initial release
  • Version 1.1: 2020-12-16
    Changes: Database references