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- PDB-7ytw: Structural basis of vitamin C recognition and transport by mammal... -
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Open data
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Basic information
Entry | Database: PDB / ID: 7ytw | ||||||||||||||||||
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Title | Structural basis of vitamin C recognition and transport by mammalian SVCT1 transporter | ||||||||||||||||||
![]() | Solute carrier family 23 member 1 | ||||||||||||||||||
![]() | STRUCTURAL PROTEIN / transporter / membrane protein / Vitamin C / sodium | ||||||||||||||||||
Function / homology | ![]() Vitamin C (ascorbate) metabolism / L-ascorbate:sodium symporter activity / L-ascorbic acid transmembrane transporter activity / L-ascorbic acid transmembrane transport / dehydroascorbic acid transmembrane transporter activity / dehydroascorbic acid transport / sodium ion transmembrane transporter activity / intracellular organelle / sodium ion transport / brush border ...Vitamin C (ascorbate) metabolism / L-ascorbate:sodium symporter activity / L-ascorbic acid transmembrane transporter activity / L-ascorbic acid transmembrane transport / dehydroascorbic acid transmembrane transporter activity / dehydroascorbic acid transport / sodium ion transmembrane transporter activity / intracellular organelle / sodium ion transport / brush border / basal plasma membrane / lung development / brain development / response to toxic substance / apical plasma membrane / plasma membrane / cytoplasm Similarity search - Function | ||||||||||||||||||
Biological species | ![]() ![]() | ||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å | ||||||||||||||||||
![]() | She, J. / Wang, M. / He, J. / Zhang, K. / Li, S. | ||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis of vitamin C recognition and transport by mammalian SVCT1 transporter. Authors: Mingxing Wang / Jin He / Shanshan Li / Qianwen Cai / Kaiming Zhang / Ji She / ![]() Abstract: Vitamin C (L-ascorbic acid) is an essential nutrient for human health, and its deficiency has long been known to cause scurvy. Sodium-dependent vitamin C transporters (SVCTs) are responsible for ...Vitamin C (L-ascorbic acid) is an essential nutrient for human health, and its deficiency has long been known to cause scurvy. Sodium-dependent vitamin C transporters (SVCTs) are responsible for vitamin C uptake and tissue distribution in mammals. Here, we present cryogenic electron microscopy structures of mouse SVCT1 in both the apo and substrate-bound states. Mouse SVCT1 forms a homodimer with each protomer containing a core domain and a gate domain. The tightly packed extracellular interfaces between the core domain and gate domain stabilize the protein in an inward-open conformation for both the apo and substrate-bound structures. Vitamin C binds at the core domain of each subunit, and two potential sodium ions are identified near the binding site. The coordination of sodium ions by vitamin C explains their coupling transport. SVCTs probably deliver substrate through an elevator mechanism in combination with local structural arrangements. Altogether, our results reveal the molecular mechanism by which SVCTs recognize vitamin C and lay a foundation for further mechanistic studies on SVCT substrate transport. | ||||||||||||||||||
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 174.4 KB | Display | ![]() |
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PDB format | ![]() | 141.4 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Summary document | ![]() | 1.3 MB | Display | ![]() |
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Full document | ![]() | 1.3 MB | Display | |
Data in XML | ![]() | 42.2 KB | Display | |
Data in CIF | ![]() | 60.5 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 34094MC ![]() 7ytyC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 65600.438 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #2: Chemical | ChemComp-NA / #3: Sugar | #4: Water | ChemComp-HOH / | Has ligand of interest | Y | |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: SVCT1 / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT |
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Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 8 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Microscopy | Model: FEI TITAN |
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Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2700 nm / Nominal defocus min: 1500 nm |
Image recording | Electron dose: 55 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.18.2_3874: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: NONE | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 2370225 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
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