6cno

Cryo-EM structure of the human SK4/calmodulin channel complex in the Ca2+ bound state II

Method: ELECTRON MICROSCOPY
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Intermediate conductance calcium-activated potassium channel protein 4

Homo sapiens

UniProt O15554

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 8 Calmodulin-1 × 4 (P0DP23) CALCIUM ION × 12 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name KCNN4_HUMAN
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–427; UniProt 1–427 Author chain B; PDBConstruct 1–427; UniProt 1–427 Author chain C; PDBConstruct 1–427; UniProt 1–427 Author chain D; PDBConstruct 1–427; UniProt 1–427

Calmodulin-1

Homo sapiens

UniProt P0DP23

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 8 Intermediate conductance calcium-activated potassium channel protein 4 × 4 (O15554) CALCIUM ION × 12 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name CALM1_HUMAN
Isoform —
PDB entities 2
Chains and sequence ranges Author chain E; PDBConstruct 1–149; UniProt 1–149 Author chain F; PDBConstruct 1–149; UniProt 1–149 Author chain G; PDBConstruct 1–149; UniProt 1–149 Author chain H; PDBConstruct 1–149; UniProt 1–149

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id6cno
Deposition date deposition_date2018-03-08
Structure title titleCryo-EM structure of the human SK4/calmodulin channel complex in the Ca2+ bound state II
Keywords keywordsion channel, neuroscience, calmodulin, MEMBRANE PROTEIN; MEMBRANE PROTEIN
Experimental Method methodELECTRON MICROSCOPY
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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

6cno__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

6cno__assembly_1__model_1 | I(q)

10-2 10-1 106 107 108 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

6cno__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg(Guinier)42.76 Å
Rg (electron density)41.75 Å
Total Rg42.01 Å
Atom count15428
Residues2024
Excluded volume277430 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 6cno__assembly_1__model_1 octameric (8) Success 4.1.3-1-20251215 (887e7ef) View Download
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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (3)

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7. Citations (1)