3j9p

Structure of the TRPA1 ion channel determined by electron cryo-microscopy

Method: ELECTRON MICROSCOPY Dmax: 142.4 Å Quality: GOOD

1. Protein Identity and Related Structures Protein Identity & Related Structures

Maltose-binding periplasmic protein, Transient receptor potential cation channel subfamily A member 1 chimera

Escherichia coli, Homo sapiens

UniProt O75762

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Insufficient information Homooligomer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 2–1119 Chain B; UniProt 2–1119 Chain C; UniProt 2–1119 Chain D; UniProt 2–1119 Fragment:SEE REMARK 999 No other associated polymer ELECTRON MICROSCOPY cryo-EM buffer:20 mM HEPES, 150 mM NaCl, 1 mM DTT, 1 mM IP6;pH 8;20 mM HEPES, 150 mM NaCl, 1 mM DTT, 1 mM IP6 cryo-EM vitrification conditions:Blot for 7 seconds before plunging.;120 K;Cryogen ETHANE;Blot for 7 seconds before plunging into liquid ethane (FEI VITROBOT MARK I). Resolution 4.24 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

16 other PDB entries and 16 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name TRPA1_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 411–1528; UniProt 2–1119 Author chain B; PDBConstruct 411–1528; UniProt 2–1119 Author chain C; PDBConstruct 411–1528; UniProt 2–1119 Author chain D; PDBConstruct 411–1528; UniProt 2–1119

Maltose-binding periplasmic protein, Transient receptor potential cation channel subfamily A member 1 chimera

Escherichia coli, Homo sapiens

UniProt P0AEX9

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Insufficient information Homooligomer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 27–392 Chain B; UniProt 27–392 Chain C; UniProt 27–392 Chain D; UniProt 27–392 Fragment:SEE REMARK 999 No other associated polymer ELECTRON MICROSCOPY cryo-EM buffer:20 mM HEPES, 150 mM NaCl, 1 mM DTT, 1 mM IP6;pH 8;20 mM HEPES, 150 mM NaCl, 1 mM DTT, 1 mM IP6 cryo-EM vitrification conditions:Blot for 7 seconds before plunging.;120 K;Cryogen ETHANE;Blot for 7 seconds before plunging into liquid ethane (FEI VITROBOT MARK I). Resolution 4.24 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

366 other PDB entries and 491 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name MALE_ECOLI
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 17–382; UniProt 27–392 Author chain B; PDBConstruct 17–382; UniProt 27–392 Author chain C; PDBConstruct 17–382; UniProt 27–392 Author chain D; PDBConstruct 17–382; UniProt 27–392

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 3j9p

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 3j9p
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2. Structure Basics 2. Structure Basics

Entry ID entry_id3j9p
Deposition date deposition_date2015-02-14
Structure title titleStructure of the TRPA1 ion channel determined by electron cryo-microscopy
Keywords keywordsTRPA1, TRP, transient, potential, receptor, ion channel, membrane protein, TRANSPORT PROTEIN; TRANSPORT PROTEIN
Experimental Method methodELECTRON MICROSCOPY

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier45.22
Radius of gyration Rg (electron density) rg_electron44.64
Forward intensity I(0) i0750550000.00
Molecular weight molecular_weight240460.0 kDa
Excluded volume excluded_volume306770 ų
Envelope volume envelope_volume455200 ų
Hydration-shell volume shell_volume82798 ų
Envelope diameter envelope_diameter145.5
Shell Rg shell_rg51.43
Envelope Rg envelope_rg43.59
Shape Rg shape_rg44.70
Total Rg total_rg44.73
Total atoms total_atoms16952
Residues n_residues2240
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax142.4
Rg (real space) rg_real45.06
Rg uncertainty (real space) rg_real_error1.01
I(0) (real space) i0_real7.5050e+08
I(0) uncertainty (real space) i0_real_error1.2560e+07
Rg (reciprocal space) rg_reciprocal45.22
I(0) (reciprocal space) i0_reciprocal750700000.0000
Solution quality estimate total_estimate0.8771
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary52.9
Skewness Skewness skewness0.253
Kurtosis Kurtosis kurtosis-0.400
Angular range angular_range— – 0.1750 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha83690000.0000
Real-space data points n_real_points36
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.900; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.986; Smooth: 0.712

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (1)

8. Citations (1)

9. Files and Curves (10)