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9uox

Structure of C. elegans piezo channel isoform k

Method: ELECTRON MICROSCOPY Dmax: 196.9 Å Quality: GOOD
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Isoform k of Piezo-type mechanosensitive ion channel component 1

Caenorhabditis elegans

UniProt A0A061ACU2

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein homooligomer Homooligomer Protein × 3 PDB declaration: trimeric（3） Consistent with protein copy count Chain A； UniProt 1–1686 Chain B； UniProt 1–1686 Chain C； UniProt 1–1686 Not recorded No other associated polymer ELECTRON MICROSCOPY cryo-EM buffer：pH 8 cryo-EM vitrification conditions：Cryogen ETHANE Resolution 3.80 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.

Other PDB Difference from Current Entry 9UOX Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Method and Experimental Conditions Structure Quality
9UOY Structure of C. elegans piezo channel Deposited 2025-04-27 Different construct Different structure-quality metrics Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric
Chain A 1–2442（2442 aa）
Chain B 1–2442（2442 aa）
Chain C 1–2442（2442 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.40 Å
9ZIS C. elegans PEZO-1 Isoform G Deposited 2025-12-04 Different construct Different structure-quality metrics Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric
Chain A 1–2442（2442 aa）
Chain B 1–2442（2442 aa）
Chain C 1–2442（2442 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.50 Å
9ZIT C. elegans PEZO-1 Isoform K Deposited 2025-12-04 Different construct Different structure-quality metrics Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric
Chain A 757–2442（1686 aa）
Chain B 757–2442（1686 aa）
Chain C 757–2442（1686 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å

3 other PDB entries and 3 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name PIEZ1_CAEEL
Isoform A0A061ACU2-11
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–1686； UniProt 1–1686 Author chain B； PDBConstruct 1–1686； UniProt 1–1686 Author chain C； PDBConstruct 1–1686； UniProt 1–1686

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 9uox

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 9uox
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2. Structure Basics 2. Structure Basics

Entry ID entry_id9uox
Deposition date deposition_date2025-04-27
Structure title titleStructure of C. elegans piezo channel isoform k
Keywords keywordsmechanosensitive channel, MEMBRANE PROTEIN; MEMBRANE PROTEIN
Experimental Method methodELECTRON MICROSCOPY
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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier63.03 Å
Radius of gyration Rg (electron density) rg_electron62.45 Å
Forward intensity I(0) i02545260000.00
Molecular weight molecular_weight457980.0 kDa
Excluded volume excluded_volume586000 ų
Envelope volume envelope_volume1043100 ų
Hydration-shell volume shell_volume137550 ų
Envelope diameter envelope_diameter189.8 Å
Shell Rg shell_rg67.16 Å
Envelope Rg envelope_rg59.34 Å
Shape Rg shape_rg62.49 Å
Total Rg total_rg62.41 Å
Total atoms total_atoms32331
Residues n_residues3972
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 Å−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
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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax196.9 Å
Rg (real space) rg_real62.53 Å
Rg uncertainty (real space) rg_real_error1.28 Å
I(0) (real space) i0_real2.5450e+09
I(0) uncertainty (real space) i0_real_error4.7190e+07
Rg (reciprocal space) rg_reciprocal63.43 Å
I(0) (reciprocal space) i0_reciprocal2549000000.0000
Solution quality estimate total_estimate0.8626
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary86.6 Å
Skewness Skewness skewness-0.052
Kurtosis Kurtosis kurtosis-0.562
Angular range angular_range— – 0.1250 Å−1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha209000000.0000
Real-space data points n_real_points26
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.850; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.958; Smooth: 0.702
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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (1)

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8. Citations (1)

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9. Files and Curves (10)