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

Experimental Data Snapshot

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

wwPDB Validation   3D Report Full Report

This is version 2.0 of the entry. See complete history


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: https://doi.org/10.1016/j.neuron.2019.11.023
  • Primary Citation of Related Structures:  
    6PQO, 6PQP, 6PQQ

  • 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 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.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transient receptor potential cation channel subfamily A member 1A,
B [auth D],
C [auth B],
D [auth C]
1,152Homo sapiensMutation(s): 0 
Gene Names: TRPA1ANKTM1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for O75762 (Homo sapiens)
Explore O75762 
Go to UniProtKB:  O75762
PHAROS:  O75762
GTEx:  ENSG00000104321 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO75762
Sequence Annotations
  • Reference Sequence


Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
E, F, G, H
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
LBN (Subject of Investigation/LOI)
Query on LBN

Download Ideal Coordinates CCD File 
BA [auth B],
JA [auth C],
N [auth A],
T [auth D]
C42 H82 N O8 P
6OU (Subject of Investigation/LOI)
Query on 6OU

Download Ideal Coordinates CCD File 
AA [auth B]
CA [auth C]
DA [auth C]
FA [auth C]
GA [auth C]
AA [auth B],
CA [auth C],
DA [auth C],
FA [auth C],
GA [auth C],
HA [auth C],
IA [auth C],
J [auth A],
K [auth A],
L [auth A],
M [auth A],
O [auth A],
Q [auth D],
R [auth D],
S [auth D],
U [auth D],
V [auth B],
X [auth B],
Y [auth B],
Z [auth B]
[(2~{R})-1-[2-azanylethoxy(oxidanyl)phosphoryl]oxy-3-hexadecanoyloxy-propan-2-yl] (~{Z})-octadec-9-enoate
C39 H76 N O8 P
9BE (Subject of Investigation/LOI)
Query on 9BE

Download Ideal Coordinates CCD File 
EA [auth C],
I [auth A],
P [auth D],
W [auth B]
C8 H9 N S
Experimental Data & Validation

Experimental Data

  • Resolution: 3.06 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 Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United States--

Revision History  (Full details and data files)

  • 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