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- PDB-9jd3: membrane proteins -

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Basic information

Entry
Database: PDB / ID: 9jd3
Titlemembrane proteins
ComponentsSodium- and chloride-dependent taurine transporter
KeywordsMEMBRANE PROTEIN / taurine / transporter
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:sodium:chloride symporter activity / gamma-aminobutyric acid import / 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:sodium:chloride symporter activity / gamma-aminobutyric acid import / 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 / GABA-ergic synapse / positive regulation of cell differentiation / modulation of chemical synaptic transmission / 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
CHOLESTEROL / DECANE / DODECANE / HEXANE / PENTANE / N-OCTANE / Sodium- and chloride-dependent taurine transporter
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsYu, J. / Ge, J.P. / Zh, Y.M.
Funding support China, 1items
OrganizationGrant numberCountry
Chinese Academy of Sciences China
CitationJournal: Nat Commun / Year: 2025
Title: Dimerization and substrate recognition of human taurine transporter.
Authors: Yimin Zhang / Jiahui Chen / Nanhao Chen / Haolin Xiong / Zhengjiang Zhu / Dongxue Yang / Jingpeng Ge / Jie Yu /
Abstract: Taurine is a conditionally essential nutrient and one of the most abundant amino acids in humans, with diverse physiological functions. The cellular uptake of taurine is primarily mediated by the ...Taurine is a conditionally essential nutrient and one of the most abundant amino acids in humans, with diverse physiological functions. The cellular uptake of taurine is primarily mediated by the taurine transporter (TauT), and its dysfunction leads to retinal regeneration, cardiomyopathy, neurological and aging-associated disorders. Here we determine structures of TauT in two states: the apo inward-facing open state and the occluded state bound with substrate taurine or γ-aminobutyric acid (GABA). In addition to monomer, the structures also reveal a TauT dimer, where two cholesterol molecules act as "molecular glue", and close contacts of two TM5 from each protomer mediate the dimer interface. In combination with functional characterizations, our results elucidate the detailed mechanisms of substrate recognition, specificity and transport by TauT, providing a structural framework for understanding TauT function and exploring potential therapeutic strategies for taurine-deficiency-related disorders.
History
DepositionAug 30, 2024Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jul 16, 2025Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Sodium- and chloride-dependent taurine transporter
hetero molecules


Theoretical massNumber of molelcules
Total (without water)72,45321
Polymers69,8821
Non-polymers2,57120
Water1267
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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Protein / Sugars , 2 types, 2 molecules A

#1: Protein Sodium- and chloride-dependent taurine transporter / Solute carrier family 6 member 6


Mass: 69881.633 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SLC6A6 / Production host: Homo sapiens (human) / References: UniProt: P31641
#9: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 8 types, 26 molecules

#2: Chemical ChemComp-D12 / DODECANE


Mass: 170.335 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C12H26
#3: Chemical ChemComp-LNK / PENTANE


Mass: 72.149 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C5H12
#4: Chemical
ChemComp-OCT / N-OCTANE


Mass: 114.229 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C8H18
#5: Chemical ChemComp-D10 / DECANE


Mass: 142.282 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H22
#6: Chemical
ChemComp-HEX / HEXANE


Mass: 86.175 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: C6H14
#7: Chemical ChemComp-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C27H46O
#8: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Cl / Feature type: SUBJECT OF INVESTIGATION
#10: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 7 / Source method: isolated from a natural source / Formula: H2O

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Details

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: tauT / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human) / Strain: Human Embryonic Kidney Cells 293
Buffer solutionpH: 8
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: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1800 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 309754 / Symmetry type: POINT

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