Structure of TRPA1 in Drosophila melanogaster in a state with 5 ankyrin repeats determined

Experimental Data Snapshot

  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Molecular architecture and gating mechanisms of the Drosophila TRPA1 channel.

Wang, X.Li, Y.Wei, H.Yang, Z.Luo, R.Gao, Y.Zhang, W.Liu, X.Sun, L.

(2023) Cell Discov 9: 36-36

  • DOI: https://doi.org/10.1038/s41421-023-00527-1
  • Primary Citation of Related Structures:  
    7YKR, 7YKS

  • PubMed Abstract: 

    The transient receptor potential channel subfamily A member 1 (TRPA1) ion channel is an evolutionary conserved polymodal sensor responding to noxious temperature or chemical stimuli. Notably, the thermosensitivity of TRPA1 varies among different species or even different isoforms in the same species. However, the underlying molecular basis of its thermo-gating remains largely unknown. Here, we determine the structures of a heat-sensitive isoform of TRPA1 in Drosophila melanogaster in two distinct conformations with cryo-samples prepared at 8 °C. Large conformational changes are observed in the ankyrin repeat domain (ARD) and the coiled-coil domain between the two states. Remarkably, all 17 ankyrin repeats are mapped in the newly resolved conformation, forming a propeller-like architecture. Two intersubunit interfaces are identified in the amino (N)-terminal domain, and play vital roles during both heat and chemical activation as shown by electrophysiological analysis. With cryo-samples prepared at 35 °C, only one conformation is resolved, suggesting possible state transitions during heat responses. These findings provide a basis for further understanding how the ARD regulates channel functions, and insights into the gating mechanism of TRPA1.

  • Organizational Affiliation

    Department of Neurology, The First Affiliated Hospital of USTC, MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Research Center for Interdisciplinary Sciences at the Microscale, Biomedical Sciences and Health Laboratory of Anhui Province, Division of Life Sciences and Medicine, University of Science and Technology of China, 230027, Hefei, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transient receptor potential cation channel subfamily A member 1
A, B, C, D
1,197Drosophila melanogasterMutation(s): 0 
Gene Names: TrpA1Anktm1CG5751
Membrane Entity: Yes 
Find proteins for Q7Z020 (Drosophila melanogaster)
Explore Q7Z020 
Go to UniProtKB:  Q7Z020
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7Z020
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China32022029
Other governmentChina2008085J15, 2008085MC90
Other governmentChinaYD9100002004
Ministry of Science and Technology (MoST, China)China20211890004

Revision History  (Full details and data files)

  • Version 1.0: 2023-07-26
    Type: Initial release
  • Version 2.0: 2023-10-04
    Type: Coordinate replacement
    Reason: Model orientation/position
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2024-02-07
    Changes: Database references