8io4

Herg1a-herg1b open state

Method: ELECTRON MICROSCOPY Dmax: 123.0 Å Quality: GOOD

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

Potassium voltage-gated channel subfamily H member 2

Homo sapiens

UniProt Q12809

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 × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 1–1159 Chain B; UniProt 1–1159 Chain C; UniProt 1–1159 Chain D; UniProt 1–1159 Not recorded No other associated polymer ELECTRON MICROSCOPY cryo-EM buffer:pH 7.4 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.50 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.

20 other PDB entries and 26 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name KCNH2_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–1159; UniProt 1–1159 Author chain B; PDBConstruct 1–1159; UniProt 1–1159 Author chain C; PDBConstruct 1–1159; UniProt 1–1159 Author chain D; PDBConstruct 1–1159; UniProt 1–1159

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 8io4

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 8io4
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2. Structure Basics 2. Structure Basics

Entry ID entry_id8io4
Deposition date deposition_date2023-03-10
Structure title titleHerg1a-herg1b open state
Keywords keywordschannelrhodopsin, MEMBRANE PROTEIN; MEMBRANE PROTEIN
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier41.32
Radius of gyration Rg (electron density) rg_electron40.85
Forward intensity I(0) i0492997000.00
Molecular weight molecular_weight194300.0 kDa
Excluded volume excluded_volume248380 ų
Envelope volume envelope_volume365790 ų
Hydration-shell volume shell_volume72600 ų
Envelope diameter envelope_diameter121.5
Shell Rg shell_rg48.51
Envelope Rg envelope_rg39.57
Shape Rg shape_rg40.86
Total Rg total_rg41.29
Total atoms total_atoms13736
Residues n_residues1724
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 dmax123.0
Rg (real space) rg_real41.09
Rg uncertainty (real space) rg_real_error0.60
I(0) (real space) i0_real4.9300e+08
I(0) uncertainty (real space) i0_real_error7.7800e+06
Rg (reciprocal space) rg_reciprocal41.32
I(0) (reciprocal space) i0_reciprocal493100000.0000
Solution quality estimate total_estimate0.8865
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary55.0
Skewness Skewness skewness0.071
Kurtosis Kurtosis kurtosis-0.531
Angular range angular_range— – 0.1900 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha44030000.0000
Real-space data points n_real_points39
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.948; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.979; Smooth: 0.696

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (1)

8. Citations (1)

9. Files and Curves (10)