[English] 日本語
![](img/lk-miru.gif)
- EMDB-9188: Cryo-EM structure of the human neutral amino acid transporter ASCT2 -
+
Open data
-
Basic information
Entry | Database: EMDB / ID: EMD-9188 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Title | Cryo-EM structure of the human neutral amino acid transporter ASCT2 | |||||||||
![]() | human neutral amino acid transporter | |||||||||
![]() |
| |||||||||
Function / homology | ![]() glutamine secretion / L-glutamine import across plasma membrane / glutamine transport / L-glutamine transmembrane transporter activity / L-serine transmembrane transporter activity / ligand-gated channel activity / neutral amino acid transport / amino acid transmembrane transporter activity / L-aspartate transmembrane transporter activity / Amino acid transport across the plasma membrane ...glutamine secretion / L-glutamine import across plasma membrane / glutamine transport / L-glutamine transmembrane transporter activity / L-serine transmembrane transporter activity / ligand-gated channel activity / neutral amino acid transport / amino acid transmembrane transporter activity / L-aspartate transmembrane transporter activity / Amino acid transport across the plasma membrane / L-aspartate import across plasma membrane / neutral L-amino acid transmembrane transporter activity / symporter activity / antiporter activity / amino acid transport / RHOJ GTPase cycle / RHOQ GTPase cycle / protein homotrimerization / RHOH GTPase cycle / transport across blood-brain barrier / RAC3 GTPase cycle / RAC1 GTPase cycle / basal plasma membrane / erythrocyte differentiation / melanosome / virus receptor activity / signaling receptor activity / extracellular exosome / membrane / metal ion binding / plasma membrane Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.84 Å | |||||||||
![]() | Yu X / Han S | |||||||||
![]() | ![]() Title: Cryo-EM structures of the human glutamine transporter SLC1A5 (ASCT2) in the outward-facing conformation. Authors: Xiaodi Yu / Olga Plotnikova / Paul D Bonin / Timothy A Subashi / Thomas J McLellan / Darren Dumlao / Ye Che / Yin Yao Dong / Elisabeth P Carpenter / Graham M West / Xiayang Qiu / Jeffrey S Culp / Seungil Han / ![]() ![]() Abstract: Alanine-serine-cysteine transporter 2 (ASCT2, SLC1A5) is the primary transporter of glutamine in cancer cells and regulates the mTORC1 signaling pathway. The SLC1A5 function involves finely tuned ...Alanine-serine-cysteine transporter 2 (ASCT2, SLC1A5) is the primary transporter of glutamine in cancer cells and regulates the mTORC1 signaling pathway. The SLC1A5 function involves finely tuned orchestration of two domain movements that include the substrate-binding transport domain and the scaffold domain. Here, we present cryo-EM structures of human SLC1A5 and its complex with the substrate, L-glutamine in an outward-facing conformation. These structures reveal insights into the conformation of the critical ECL2a loop which connects the two domains, thus allowing rigid body movement of the transport domain throughout the transport cycle. Furthermore, the structures provide new insights into substrate recognition, which involves conformational changes in the HP2 loop. A putative cholesterol binding site was observed near the domain interface in the outward-facing state. Comparison with the previously determined inward-facing structure of SCL1A5 provides a basis for a more integrated understanding of substrate recognition and transport mechanism in the SLC1 family. | |||||||||
History |
|
-
Structure visualization
Movie |
![]() |
---|---|
Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
-
Downloads & links
-EMDB archive
Map data | ![]() | 3.3 MB | ![]() | |
---|---|---|---|---|
Header (meta data) | ![]() ![]() | 16.5 KB 16.5 KB | Display Display | ![]() |
Images | ![]() | 59.9 KB | ||
Masks | ![]() | 42.9 MB | ![]() | |
Others | ![]() ![]() | 2.6 MB 2.6 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6mpbMC ![]() 9187C ![]() 6mp6C C: citing same article ( M: atomic model generated by this map |
---|---|
Similar structure data |
-
Links
EMDB pages | ![]() ![]() |
---|---|
Related items in Molecule of the Month |
-
Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | human neutral amino acid transporter | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.086 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
|
-Supplemental data
-Mask #1
File | ![]() | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Projections & Slices |
| ||||||||||||
Density Histograms |
-Half map: human neutral amino acid transporter, half map #1
File | emd_9188_half_map_1.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | human neutral amino acid transporter, half map #1 | ||||||||||||
Projections & Slices |
| ||||||||||||
Density Histograms |
-Half map: human neutral amino acid transporter, half map #2
File | emd_9188_half_map_2.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | human neutral amino acid transporter, half map #2 | ||||||||||||
Projections & Slices |
| ||||||||||||
Density Histograms |
-
Sample components
-Entire : Ternary complex of SLC1A5
Entire | Name: Ternary complex of SLC1A5 |
---|---|
Components |
|
-Supramolecule #1: Ternary complex of SLC1A5
Supramolecule | Name: Ternary complex of SLC1A5 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1 |
---|---|
Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() |
Molecular weight | Experimental: 170 KDa |
-Macromolecule #1: Neutral amino acid transporter B(0)
Macromolecule | Name: Neutral amino acid transporter B(0) / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO |
---|---|
Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 56.638902 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MVADPPRDSK GLAAAEPTAN GGLALASIED QGAAAGGYCG SRDQVRRCLR ANLLVLLTVV AVVAGVALGL GVSGAGGALA LGPERLSAF VFPGELLLRL LRMIILPLVV CSLIGGAASL DPGALGRLGA WALLFFLVTT LLASALGVGL ALALQPGAAS A AINASVGA ...String: MVADPPRDSK GLAAAEPTAN GGLALASIED QGAAAGGYCG SRDQVRRCLR ANLLVLLTVV AVVAGVALGL GVSGAGGALA LGPERLSAF VFPGELLLRL LRMIILPLVV CSLIGGAASL DPGALGRLGA WALLFFLVTT LLASALGVGL ALALQPGAAS A AINASVGA AGSAENAPSK EVLDSFLDLA RNIFPSNLVS AAFRSYSTTY EERNITGTRV KVPVGQEVEG MNILGLVVFA IV FGVALRK LGPEGELLIR FFNSFNEATM VLVSWIMWYA PVGIMFLVAG KIVEMEDVGL LFARLGKYIL CCLLGHAIHG LLV LPLIYF LFTRKNPYRF LWGIVTPLAT AFGTSSSSAT LPLMMKCVEE NNGVAKHISR FILPIGATVN MDGAALFQCV AAVF IAQLS QQSLDFVKII TILVTATASS VGAAGIPAGG VLTLAIILEA VNLPVDHISL ILAVDWLVDR SCTVLNVEGD ALGAG LLQN YVDRTESRST EPELIQVKSE LPLDPLPVPT EEGNPLLKHY RGPAGDATVA SEKESVM |
-Macromolecule #2: GLUTAMINE
Macromolecule | Name: GLUTAMINE / type: ligand / ID: 2 / Number of copies: 3 / Formula: GLN |
---|---|
Molecular weight | Theoretical: 146.144 Da |
Chemical component information | ![]() ChemComp-GLN: |
-Macromolecule #3: 2-acetamido-2-deoxy-beta-D-glucopyranose
Macromolecule | Name: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 3 / Number of copies: 3 / Formula: NAG |
---|---|
Molecular weight | Theoretical: 221.208 Da |
Chemical component information | ![]() ChemComp-NAG: |
-Experimental details
-Structure determination
Method | cryo EM |
---|---|
![]() | single particle reconstruction |
Aggregation state | particle |
-
Sample preparation
Concentration | 2 mg/mL |
---|---|
Buffer | pH: 7.5 |
Grid | Details: unspecified |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
-
Electron microscopy
Microscope | FEI TITAN KRIOS |
---|---|
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 1.06 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 100.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
-
Image processing
CTF correction | Software - Name: Gctf |
---|---|
Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.84 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cisTEM / Number images used: 253220 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD / Software - Name: RELION |
Final angle assignment | Type: MAXIMUM LIKELIHOOD / Software - Name: cisTEM |