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- EMDB-61386: taurine transporter -

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Basic information

Entry
Database: EMDB / ID: EMD-61386
Titletaurine transporter
Map data
Sample
  • Complex: tauT
    • Protein or peptide: Sodium- and chloride-dependent taurine transporter
  • Ligand: 2-AMINOETHANESULFONIC ACID
  • Ligand: N-OCTANE
  • Ligand: DECANE
  • Ligand: DODECANE
  • Ligand: CHLORIDE ION
  • Ligand: SODIUM ION
Keywordstaurine / transporter / MEMBRANE PROTEIN
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
Sodium- and chloride-dependent taurine transporter
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.23 Å
AuthorsYu J / Ge JP / Zh YM
Funding support China, 1 items
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 31, 2024-
Header (metadata) releaseJul 16, 2025-
Map releaseJul 16, 2025-
UpdateJul 16, 2025-
Current statusJul 16, 2025Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_61386.png

Downloads & links

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Map

FileDownload / File: emd_61386.map.gz / Format: CCP4 / Size: 52.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.06 Å/pix.
x 240 pix.
= 253.2 Å		1.06 Å/pix.
x 240 pix.
= 253.2 Å		1.06 Å/pix.
x 240 pix.
= 253.2 Å

Surface

Projections

Slices (1/3)

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.055 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.3
Minimum - Maximum-1.6033244 - 2.2369392
Average (Standard dev.)0.00010272473 (±0.03904654)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions240240240
Spacing240240240
CellA=B=C: 253.19998 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_61386_msk_1.map
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Half map: #2

Fileemd_61386_half_map_1.map
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Histogram

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Half map: #1

Fileemd_61386_half_map_2.map
Projections & Slices
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Sample components

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Entire : tauT

EntireName: tauT
Components
  • Complex: tauT
    • Protein or peptide: Sodium- and chloride-dependent taurine transporter
  • Ligand: 2-AMINOETHANESULFONIC ACID
  • Ligand: N-OCTANE
  • Ligand: DECANE
  • Ligand: DODECANE
  • Ligand: CHLORIDE ION
  • Ligand: SODIUM ION

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Supramolecule #1: tauT

SupramoleculeName: tauT / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Sodium- and chloride-dependent taurine transporter

MacromoleculeName: Sodium- and chloride-dependent taurine transporter / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 69.881633 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MATKEKLQCL KDFHKDILKP SPGKSPGTRP EDEAEGKPPQ REKWSSKIDF VLSVAGGFVG LGNVWRFPYL CYKNGGGAFL IPYFIFLFG SGLPVFFLEI IIGQYTSEGG ITCWEKICPL FSGIGYASVV IVSLLNVYYI VILAWATYYL FQSFQKELPW A HCNHSWNT ...String:
MATKEKLQCL KDFHKDILKP SPGKSPGTRP EDEAEGKPPQ REKWSSKIDF VLSVAGGFVG LGNVWRFPYL CYKNGGGAFL IPYFIFLFG SGLPVFFLEI IIGQYTSEGG ITCWEKICPL FSGIGYASVV IVSLLNVYYI VILAWATYYL FQSFQKELPW A HCNHSWNT PHCMEDTMRK NKSVWITISS TNFTSPVIEF WERNVLSLSP GIDHPGSLKW DLALCLLLVW LVCFFCIWKG VR STGKVVY FTATFPFAML LVLLVRGLTL PGAGAGIKFY LYPDITRLED PQVWIDAGTQ IFFSYAICLG AMTSLGSYNK YKY NSYRDC MLLGCLNSGT SFVSGFAIFS ILGFMAQEQG VDIADVAESG PGLAFIAYPK AVTMMPLPTF WSILFFIMLL LLGL DSQFV EVEGQITSLV DLYPSFLRKG YRREIFIAFV CSISYLLGLT MVTEGGMYVF QLFDYYAASG VCLLWVAFFE CFVIA WIYG GDNLYDGIED MIGYRPGPWM KYSWAVITPV LCVGCFIFSL VKYVPLTYNK TYVYPNWAIG LGWSLALSSM LCVPLV IVI RLCQTEGPFL VRVKYLLTPR EPNRWAVERE GATPYNSRTV MNGALVKPTH IIVETMM

UniProtKB: Sodium- and chloride-dependent taurine transporter

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Macromolecule #2: 2-AMINOETHANESULFONIC ACID

MacromoleculeName: 2-AMINOETHANESULFONIC ACID / type: ligand / ID: 2 / Number of copies: 1 / Formula: TAU
Molecular weightTheoretical: 125.147 Da
Chemical component information

ChemComp-TAU:
2-AMINOETHANESULFONIC ACID

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Macromolecule #3: N-OCTANE

MacromoleculeName: N-OCTANE / type: ligand / ID: 3 / Number of copies: 2 / Formula: OCT
Molecular weightTheoretical: 114.229 Da
Chemical component information

ChemComp-OCT:
N-OCTANE

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Macromolecule #4: DECANE

MacromoleculeName: DECANE / type: ligand / ID: 4 / Number of copies: 1 / Formula: D10
Molecular weightTheoretical: 142.282 Da
Chemical component information

ChemComp-D10:
DECANE

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Macromolecule #5: DODECANE

MacromoleculeName: DODECANE / type: ligand / ID: 5 / Number of copies: 1 / Formula: D12
Molecular weightTheoretical: 170.335 Da
Chemical component information

ChemComp-D12:
DODECANE

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Macromolecule #6: CHLORIDE ION

MacromoleculeName: CHLORIDE ION / type: ligand / ID: 6 / Number of copies: 1 / Formula: CL
Molecular weightTheoretical: 35.453 Da

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Macromolecule #7: SODIUM ION

MacromoleculeName: SODIUM ION / type: ligand / ID: 7 / Number of copies: 2
Molecular weightTheoretical: 22.99 Da

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 8
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI POLARA 300
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.8 µm
Experimental equipment
Model: Tecnai Polara / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.23 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 178159
Initial angle assignmentType: RANDOM ASSIGNMENT
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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