6PQP

Cryo-EM structure of the human TRPA1 ion channel in complex with the covalent agonist BITC


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.06 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report



Literature

Structural Insights into Electrophile Irritant Sensing by the Human TRPA1 Channel.

Suo, Y.Wang, Z.Zubcevic, L.Hsu, A.L.He, Q.Borgnia, M.J.Ji, R.R.Lee, S.Y.

(2020) Neuron 105: 882

  • DOI: 10.1016/j.neuron.2019.11.023
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Transient receptor potential channel subfamily A member 1 (TRPA1) is a Ca 2+ -permeable cation channel that serves as one of the primary sensors of environmental irritants and noxious substances. Many TRPA1 agonists are electrophiles that ...

    Transient receptor potential channel subfamily A member 1 (TRPA1) is a Ca 2+ -permeable cation channel that serves as one of the primary sensors of environmental irritants and noxious substances. Many TRPA1 agonists are electrophiles that are recognized by TRPA1 via covalent bond modifications of specific cysteine residues located in the cytoplasmic domains. However, a mechanistic understanding of electrophile sensing by TRPA1 has been limited due to a lack of high-resolution structural information. Here, we present the cryoelectron microscopy (cryo-EM) structures of nanodisc-reconstituted ligand-free TRPA1 and TRPA1 in complex with the covalent agonists JT010 and BITC at 2.8, 2.9, and 3.1 Å, respectively. Our structural and functional studies provide the molecular basis for electrophile recognition by the extraordinarily reactive C621 in TRPA1 and mechanistic insights into electrophile-dependent conformational changes in TRPA1. This work also provides a platform for future drug development targeting TRPA1.


    Organizational Affiliation

    Department of Biochemistry, Duke University School of Medicine, Durham, NC 27710, USA. Electronic address: seok-yong.lee@duke.edu.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transient receptor potential cation channel subfamily A member 1A, B, C, D1152Homo sapiensMutation(s): 0 
Gene Names: TRPA1ANKTM1
Find proteins for O75762 (Homo sapiens)
Explore O75762 
Go to UniProtKB:  O75762
NIH Common Fund Data Resources
PHAROS  O75762
Protein Feature View
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  • Reference Sequence
Oligosaccharides
Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
A, B, C, D
2 N/A
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
LBN
Query on LBN

Download CCD File 
A, B, C, D
1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine
C42 H82 N O8 P
WTJKGGKOPKCXLL-VYOBOKEXSA-N
 Ligand Interaction
6OU
Query on 6OU

Download CCD File 
A, B, C, D
[(2~{R})-1-[2-azanylethoxy(oxidanyl)phosphoryl]oxy-3-hexadecanoyloxy-propan-2-yl] (~{Z})-octadec-9-enoate
C39 H76 N O8 P
FHQVHHIBKUMWTI-OTMQOFQLSA-N
 Ligand Interaction
9BE
Query on 9BE

Download CCD File 
A, B, C, D
N-benzylthioformamide
C8 H9 N S
QAADZYUXQLUXFX-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.06 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United States--

Revision History 

  • Version 1.0: 2020-01-08
    Type: Initial release
  • Version 1.1: 2020-03-18
    Changes: Data collection, Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary