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- PDB-8x1s: Cryo-EM structure of human DRA (SLC26A3) bound with tenidap -

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Basic information

Entry
Database: PDB / ID: 8x1s
TitleCryo-EM structure of human DRA (SLC26A3) bound with tenidap
ComponentsChloride anion exchanger
KeywordsTRANSPORT PROTEIN / DRA / SLC26A3 / tenidap
Function / homology
Function and homology information


Defective SLC26A3 causes congenital secretory chloride diarrhea 1 (DIAR1) / Inorganic anion exchange by SLC26 transporters / sulfate transmembrane transporter activity / oxalate transmembrane transporter activity / sulfate transmembrane transport / secondary active sulfate transmembrane transporter activity / intracellular pH elevation / chloride:bicarbonate antiporter activity / solute:inorganic anion antiporter activity / bicarbonate transmembrane transporter activity ...Defective SLC26A3 causes congenital secretory chloride diarrhea 1 (DIAR1) / Inorganic anion exchange by SLC26 transporters / sulfate transmembrane transporter activity / oxalate transmembrane transporter activity / sulfate transmembrane transport / secondary active sulfate transmembrane transporter activity / intracellular pH elevation / chloride:bicarbonate antiporter activity / solute:inorganic anion antiporter activity / bicarbonate transmembrane transporter activity / monoatomic anion transport / membrane hyperpolarization / chloride transmembrane transporter activity / sperm capacitation / monoatomic ion transport / sperm midpiece / chloride transmembrane transport / cellular response to cAMP / brush border membrane / apical plasma membrane / membrane / plasma membrane
Similarity search - Function
Sulphate anion transporter, conserved site / SLC26A transporters signature. / SLC26A/SulP transporter / SLC26A/SulP transporter domain / Sulfate permease family / STAS domain / STAS domain profile. / STAS domain / STAS domain superfamily
Similarity search - Domain/homology
Chem-I2U / 1-O-OCTADECYL-SN-GLYCERO-3-PHOSPHOCHOLINE / Chloride anion exchanger
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.37 Å
AuthorsYang, X. / Zhang, Y.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: To Be Published
Title: Cryo-EM structure of human DRA (SLC26A3) bound with tenidap
Authors: Yang, X. / Zhang, Y.
History
DepositionNov 8, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0May 14, 2025Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: Mask / Part number: 1 / Data content type: Mask / Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Chloride anion exchanger
B: Chloride anion exchanger
hetero molecules


Theoretical massNumber of molelcules
Total (without water)173,4908
Polymers171,7562
Non-polymers1,7346
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 Chloride anion exchanger / DRA


Mass: 85877.844 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SLC26A3 / Cell line (production host): HEk293 / Production host: Homo sapiens (human) / References: UniProt: P40879
#2: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Cl / Feature type: SUBJECT OF INVESTIGATION
#3: Chemical ChemComp-LPE / 1-O-OCTADECYL-SN-GLYCERO-3-PHOSPHOCHOLINE / LPC-ETHER


Mass: 510.708 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C26H57NO6P / Feature type: SUBJECT OF INVESTIGATION
#4: Chemical ChemComp-I2U / 5-chloranyl-2-oxidanyl-3-thiophen-2-ylcarbonyl-indole-1-carboxamide / tenidap


Mass: 320.751 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C14H9ClN2O3S / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
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: DRA / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.5
SpecimenConc.: 12 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 281 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 130000 X / Nominal defocus max: 1600 nm / Nominal defocus min: 900 nm / Cs: 2.7 mm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 3.89 sec. / Electron dose: 49.6 e/Å2 / Film or detector model: TFS FALCON 4i (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 2838
EM imaging opticsEnergyfilter name: TFS Selectris X / Energyfilter slit width: 20 eV

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Processing

EM softwareName: EPU / Category: image acquisition
CTF correctionType: NONE
3D reconstructionResolution: 2.37 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 215033 / Symmetry type: POINT

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