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- PDB-22kq: Cryo-EM structure of AtSLAH3 -

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Basic information

Entry
Database: PDB / ID: 22kq
TitleCryo-EM structure of AtSLAH3
ComponentsS-type anion channel SLAH3
KeywordsMEMBRANE PROTEIN / homotrimer / plant protein / transport protein
Function / homology
Function and homology information


voltage-gated monoatomic anion channel activity / intracellular monoatomic ion homeostasis / response to water deprivation / chloride transport / response to salt stress / plasma membrane
Similarity search - Function
S-type anion channel / Transporter protein SLAC1/Mae1/ Ssu1/TehA / Voltage-dependent anion channel superfamily / Voltage-dependent anion channel
Similarity search - Domain/homology
S-type anion channel SLAH3
Similarity search - Component
Biological speciesArabidopsis thaliana (thale cress)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.62 Å
AuthorsGao, S. / Yao, X. / Wang, Y.Q. / Zhao, B.X. / Pan, D.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)22477098 China
CitationJournal: To Be Published
Title: Cryo-EM structure of AtSLAH3
Authors: Shuai, G. / Xia, Y. / Yuqin, W.
History
DepositionJan 14, 2026Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Oct 7, 2026Provider: repository / Type: Initial release
Revision 1.0Oct 7, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: S-type anion channel SLAH3
B: S-type anion channel SLAH3
C: S-type anion channel SLAH3


Theoretical massNumber of molelcules
Total (without water)217,2643
Polymers217,2643
Non-polymers00
Water00
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 S-type anion channel SLAH3 / SLAC1-homolog protein 3


Mass: 72421.453 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Arabidopsis thaliana (thale cress) / Gene: SLAH3, At5g24030, MZF18.9 / Production host: Homo sapiens (human) / References: UniProt: Q9FLV9
Has protein modificationN

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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: SLAH3 / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Arabidopsis thaliana (thale cress)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.5
SpecimenEmbedding 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: 1900 nm / Nominal defocus min: 1200 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameVersionCategory
1cryoSPARCparticle selection
2PHENIX1.20.1_4487model refinement
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.62 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 110526 / Symmetry type: POINT
RefinementHighest resolution: 2.62 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0048850
ELECTRON MICROSCOPYf_angle_d0.5912078
ELECTRON MICROSCOPYf_dihedral_angle_d5.721162
ELECTRON MICROSCOPYf_chiral_restr0.0421389
ELECTRON MICROSCOPYf_plane_restr0.0051461

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