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- PDB-9ned: AcA-EI-shaker with free peptide conformation B -

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Basic information

Entry
Database: PDB / ID: 9ned
TitleAcA-EI-shaker with free peptide conformation B
ComponentsPotassium voltage-gated channel protein Shaker
KeywordsMEMBRANE PROTEIN / voltage-gated potassium channel
Function / homology
Function and homology information


mating behavior, sex discrimination / Phase 3 - rapid repolarisation / behavioral response to ether / Voltage gated Potassium channels / proboscis extension reflex / larval locomotory behavior / regulation of synaptic activity / courtship behavior / positive regulation of membrane potential / regulation of circadian sleep/wake cycle, sleep ...mating behavior, sex discrimination / Phase 3 - rapid repolarisation / behavioral response to ether / Voltage gated Potassium channels / proboscis extension reflex / larval locomotory behavior / regulation of synaptic activity / courtship behavior / positive regulation of membrane potential / regulation of circadian sleep/wake cycle, sleep / positive regulation of circadian sleep/wake cycle, sleep / detection of visible light / delayed rectifier potassium channel activity / sleep / cellular response to dopamine / axon extension / voltage-gated monoatomic cation channel activity / action potential / voltage-gated potassium channel activity / voltage-gated potassium channel complex / potassium ion transmembrane transport / protein homooligomerization / potassium ion transport / sensory perception of taste / perikaryon / learning or memory / neuron projection / membrane raft / membrane
Similarity search - Function
Potassium channel, voltage dependent, Kv1 / Potassium channel, voltage dependent, Kv / Potassium channel tetramerisation-type BTB domain / BTB/POZ domain / Voltage-gated potassium channel / Broad-Complex, Tramtrack and Bric a brac / Voltage-dependent channel domain superfamily / BTB/POZ domain / SKP1/BTB/POZ domain superfamily / Ion transport domain / Ion transport protein
Similarity search - Domain/homology
: / Chem-POV / Potassium voltage-gated channel protein Shaker
Similarity search - Component
Biological speciesDrosophila melanogaster (fruit fly)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsTan, X. / Swartz, K.J.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS) United States
CitationJournal: Nature / Year: 2025
Title: Structural basis of fast N-type inactivation in Kv channels
Authors: Tan, X. / Fernandez-Marino, A.I. / Li, Y. / Chang, T.-H. / Swartz, K.J.
History
DepositionFeb 19, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Aug 6, 2025Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Potassium voltage-gated channel protein Shaker
B: Potassium voltage-gated channel protein Shaker
C: Potassium voltage-gated channel protein Shaker
D: Potassium voltage-gated channel protein Shaker
G: Potassium voltage-gated channel protein Shaker
H: Potassium voltage-gated channel protein Shaker
hetero molecules


Theoretical massNumber of molelcules
Total (without water)477,24540
Polymers452,8446
Non-polymers24,40134
Water181
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein
Potassium voltage-gated channel protein Shaker / Protein minisleep


Mass: 75474.023 Da / Num. of mol.: 6 / Mutation: E12KD13K
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Drosophila melanogaster (fruit fly) / Gene: Sh, mns, CG12348 / Cell line (production host): HEK TSA201 / Production host: Homo sapiens (human) / References: UniProt: P08510
#2: Chemical...
ChemComp-POV / (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate / POPC


Mass: 760.076 Da / Num. of mol.: 32 / Source method: obtained synthetically / Formula: C42H82NO8P / Comment: phospholipid*YM
#3: Chemical ChemComp-K / POTASSIUM ION


Mass: 39.098 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: K
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Formula: H2O
Has ligand of interestN
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Potassium voltage-gated channel Shaker with free peptide
Type: CELL / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Drosophila melanogaster (fruit fly)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.5
SpecimenConc.: 4.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1500 nm / Nominal defocus min: 500 nm
Image recordingElectron dose: 52 e/Å2 / Film or detector model: GATAN K3 BIOCONTINUUM (6k x 4k)

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Processing

CTF correctionType: NONE
3D reconstructionResolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 109792 / Symmetry type: POINT
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 102.71 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.003210458
ELECTRON MICROSCOPYf_angle_d0.610514123
ELECTRON MICROSCOPYf_chiral_restr0.04151639
ELECTRON MICROSCOPYf_plane_restr0.00491728
ELECTRON MICROSCOPYf_dihedral_angle_d13.60763662

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