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- EMDB-36027: Human high-affinity choline transporter CHT1 in the HC-3-bound ou... -
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Open data
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Basic information
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Title | Human high-affinity choline transporter CHT1 in the HC-3-bound outward-facing open conformation, monomeric state | |||||||||
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![]() | CHT1 / SLC5A7 / high affinity choline transporter / choline transporter / MEMBRANE PROTEIN | |||||||||
Function / homology | ![]() choline:sodium symporter activity / Defective SLC5A7 causes distal hereditary motor neuronopathy 7A (HMN7A) / Defective SLC5A7 causes distal hereditary motor neuronopathy 7A (HMN7A) / acetylcholine biosynthetic process / Transport of bile salts and organic acids, metal ions and amine compounds / choline transmembrane transporter activity / Acetylcholine Neurotransmitter Release Cycle / choline transport / neuromuscular synaptic transmission / choline binding ...choline:sodium symporter activity / Defective SLC5A7 causes distal hereditary motor neuronopathy 7A (HMN7A) / Defective SLC5A7 causes distal hereditary motor neuronopathy 7A (HMN7A) / acetylcholine biosynthetic process / Transport of bile salts and organic acids, metal ions and amine compounds / choline transmembrane transporter activity / Acetylcholine Neurotransmitter Release Cycle / choline transport / neuromuscular synaptic transmission / choline binding / synaptic transmission, cholinergic / neurotransmitter transport / neuromuscular junction / transmembrane transport / synaptic vesicle membrane / early endosome membrane / presynaptic membrane / perikaryon / in utero embryonic development / axon / synapse / dendrite / membrane / plasma membrane Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.6 Å | |||||||||
![]() | Gao Y / Qiu Y / Zhao Y | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Transport mechanism of presynaptic high-affinity choline uptake by CHT1. Authors: Yunlong Qiu / Yiwei Gao / Bo Huang / Qinru Bai / Yan Zhao / ![]() Abstract: Choline is a vital nutrient and a precursor for the biosynthesis of essential metabolites, including acetylcholine (ACh), that play a central role in fetal development, especially in the brain. In ...Choline is a vital nutrient and a precursor for the biosynthesis of essential metabolites, including acetylcholine (ACh), that play a central role in fetal development, especially in the brain. In cholinergic neurons, the high-affinity choline transporter (CHT1) provides an extraordinarily efficient reuptake mechanism to reutilize choline derived from intrasynaptical ACh hydrolysis and maintain ACh synthesis in the presynapse. Here, we determined structures of human CHT1 in three discrete states: the outward-facing state bound with the competitive inhibitor hemicholinium-3 (HC-3); the inward-facing occluded state bound with the substrate choline; and the inward-facing apo open state. Our structures and functional characterizations elucidate how the inhibitor and substrate are recognized. Moreover, our findings shed light on conformational changes when transitioning from an outward-facing to an inward-facing state and establish a framework for understanding the transport cycle, which relies on the stabilization of the outward-facing state by a short intracellular helix, IH1. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 59.8 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 18.6 KB 18.6 KB | Display Display | ![]() |
Images | ![]() | 103.4 KB | ||
Filedesc metadata | ![]() | 6.3 KB | ||
Others | ![]() ![]() ![]() | 31.9 MB 59.4 MB 59.4 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8j75MC ![]() 8j74C ![]() 8j76C ![]() 8j77C M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 0.82 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Additional map: #1
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-Half map: #2
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Density Histograms |
-Half map: #1
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Sample components
-Entire : Human high-affinity choline transporter 1
Entire | Name: Human high-affinity choline transporter 1 |
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Components |
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-Supramolecule #1: Human high-affinity choline transporter 1
Supramolecule | Name: Human high-affinity choline transporter 1 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1 |
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Source (natural) | Organism: ![]() |
-Macromolecule #1: High affinity choline transporter 1
Macromolecule | Name: High affinity choline transporter 1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 63.239145 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MAFHVEGLIA IIVFYLLILL VGIWAAWRTK NSGSAEERSE AIIVGGRDIG LLVGGFTMTA TWVGGGYING TAEAVYVPGY GLAWAQAPI GYSLSLILGG LFFAKPMRSK GYVTMLDPFQ QIYGKRMGGL LFIPALMGEM FWAAAIFSAL GATISVIIDV D MHISVIIS ...String: MAFHVEGLIA IIVFYLLILL VGIWAAWRTK NSGSAEERSE AIIVGGRDIG LLVGGFTMTA TWVGGGYING TAEAVYVPGY GLAWAQAPI GYSLSLILGG LFFAKPMRSK GYVTMLDPFQ QIYGKRMGGL LFIPALMGEM FWAAAIFSAL GATISVIIDV D MHISVIIS ALIATLYTLV GGLYSVAYTD VVQLFCIFVG LWISVPFALS HPAVADIGFT AVHAKYQKPW LGTVDSSEVY SW LDSFLLL MLGGIPWQAY FQRVLSSSSA TYAQVLSFLA AFGCLVMAIP AILIGAIGAS TDWNQTAYGL PDPKTTEEAD MIL PIVLQY LCPVYISFFG LGAVSAAVMS SADSSILSAS SMFARNIYQL SFRQNASDKE IVWVMRITVF VFGASATAMA LLTK TVYGL WYLSSDLVYI VIFPQLLCVL FVKGTNTYGA VAGYVSGLFL RITGGEPYLY LQPLIFYPGY YPDDNGIYNQ KFPFK TLAM VTSFLTNICI SYLAKYLFES GTLPPKLDVF DAVVARHSEE NMDKTILVKN ENIKLDELAL VKPRQSMTLS STFTNK EAF LDVDSSPEGS GTEDNLQ UniProtKB: High affinity choline transporter 1 |
-Macromolecule #3: (2S,2'S)-2,2'-biphenyl-4,4'-diylbis(2-hydroxy-4,4-dimethylmorphol...
Macromolecule | Name: (2S,2'S)-2,2'-biphenyl-4,4'-diylbis(2-hydroxy-4,4-dimethylmorpholin-4-ium) type: ligand / ID: 3 / Number of copies: 1 / Formula: HC6 |
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Molecular weight | Theoretical: 414.538 Da |
Chemical component information | ![]() ChemComp-HC6: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 10 mg/mL |
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Buffer | pH: 7.5 |
Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
Details | This sample was obtained from the monodispersed peak fractions of the size-exclusion chromatography. |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 60.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.2 µm / Nominal defocus min: 1.2 µm / Nominal magnification: 165000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Refinement | Protocol: AB INITIO MODEL |
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Output model | ![]() PDB-8j75: |