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- PDB-9k21: Cryo-EM structure of human taurine transporter TauT bound with ho... -

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Basic information

Entry
Database: PDB / ID: 9k21
TitleCryo-EM structure of human taurine transporter TauT bound with homotaurine in an inward-open state
Components
  • Fragment antigen binding heavy chain
  • Fragment antigen binding light chain
  • Sodium- and chloride-dependent taurine transporter
KeywordsSTRUCTURAL PROTEIN/IMMUNE SYSTEM / Inhibitor / transport protein / structural / STRUCTURAL PROTEIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information


taurine transmembrane transporter activity / alanine transmembrane transporter activity / gamma-aminobutyric acid transmembrane transporter activity / taurine:sodium symporter activity / import across plasma membrane / gamma-aminobutyric acid import / gamma-aminobutyric acid:sodium:chloride symporter activity / alanine transport / amino acid:sodium symporter activity / amino acid import across plasma membrane ...taurine transmembrane transporter activity / alanine transmembrane transporter activity / gamma-aminobutyric acid transmembrane transporter activity / taurine:sodium symporter activity / import across plasma membrane / gamma-aminobutyric acid import / gamma-aminobutyric acid:sodium:chloride symporter activity / alanine transport / amino acid:sodium symporter activity / amino acid import across plasma membrane / taurine transmembrane transport / amino acid transmembrane transporter activity / Amino acid transport across the plasma membrane / Na+/Cl- dependent neurotransmitter transporters / neurotransmitter transport / microvillus membrane / amino acid transport / transport across blood-brain barrier / sodium ion transmembrane transport / cell projection / positive regulation of cell differentiation / modulation of chemical synaptic transmission / GABA-ergic synapse / basolateral plasma membrane / postsynaptic membrane / apical plasma membrane / neuronal cell body / dendrite / membrane / plasma membrane
Similarity search - Function
Sodium:neurotransmitter symporter, taurine / Sodium:neurotransmitter symporter family signature 2. / Sodium:neurotransmitter symporter family signature 1. / Sodium:neurotransmitter symporter / Sodium:neurotransmitter symporter superfamily / Sodium:neurotransmitter symporter family / Sodium:neurotransmitter symporter family profile.
Similarity search - Domain/homology
3-aminopropane-1-sulfonic acid / Sodium- and chloride-dependent taurine transporter
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.45 Å
AuthorsDu, B. / Yan, K.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: To Be Published
Title: Molecular basis of human taurine transporter uptake and inhibition
Authors: Du, B. / Yan, K.
History
DepositionOct 16, 2024Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Aug 20, 2025Provider: repository / Type: Initial release
Revision 1.0Aug 20, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Aug 20, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Aug 20, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Aug 20, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Aug 20, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Aug 20, 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
H: Fragment antigen binding heavy chain
L: Fragment antigen binding light chain
A: Sodium- and chloride-dependent taurine transporter
hetero molecules


Theoretical massNumber of molelcules
Total (without water)101,6805
Polymers101,5053
Non-polymers1752
Water00
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Antibody Fragment antigen binding heavy chain


Mass: 13138.654 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#2: Antibody Fragment antigen binding light chain


Mass: 14920.076 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#3: Protein Sodium- and chloride-dependent taurine transporter / Sodium- and chloride- dependent taurine transporter TauT / Solute carrier family 6 member 6


Mass: 73446.273 Da / Num. of mol.: 1
Mutation: D486N, N487R, L488F, Y489S, D490E, G491D, E493R, Y498F, R499P, K319H, Y320N, S322V
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SLC6A6 / Production host: Homo sapiens (human) / References: UniProt: P31641
#4: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Cl / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical ChemComp-A20 / 3-aminopropane-1-sulfonic acid


Mass: 139.173 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C3H9NO3S / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
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: Human taurine transporter complex with homotaurine in an inward-open state
Type: COMPLEX / Entity ID: #1-#3 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
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: Tecnai Polara / Image courtesy: FEI Company
MicroscopyModel: FEI POLARA 300
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: FEI FALCON III (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.45 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 164725 / Symmetry type: POINT

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