Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 170.36 kDa 
• Atom Count: 9672 
• Residue Count: 1296 
• Unique protein chains: 1

6GCT

cryo-EM structure of the human neutral amino acid transporter ASCT2

• DOI: 10.2210/pdb6GCT/pdb
• EMDataResource: EMD-4386

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Komagataella pastoris
• Mutation(s): No 


• Deposited: 2018-04-19 Released: 2018-06-13 
• Deposition Author(s): Garaeva, A.A., Oostergetel, G.T., Gati, C., Guskov, A., Paulino, C., Slotboom, D.J.
• Funding Organization(s): European Commission

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.85 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structure of the human neutral amino acid transporter ASCT2.

Garaeva, A.A., Oostergetel, G.T., Gati, C., Guskov, A., Paulino, C., Slotboom, D.J.

(2018) Nat Struct Mol Biol 25: 515-521

• PubMed: 29872227 
• DOI: 10.1038/s41594-018-0076-y
• Primary Citation of Related Structures:  
  6GCT


• PubMed Abstract: 
  

Human ASCT2 belongs to the SLC1 family of secondary transporters and is specific for the transport of small neutral amino acids. ASCT2 is upregulated in cancer cells and serves as the receptor for many retroviruses; hence, it has importance as a potential drug target. Here we used single-particle cryo-EM to determine a structure of the functional and unmodified human ASCT2 at 3.85-Å resolution. ASCT2 forms a homotrimeric complex in which each subunit contains a transport and a scaffold domain. Prominent extracellular extensions on the scaffold domain form the predicted docking site for retroviruses. Relative to structures of other SLC1 members, ASCT2 is in the most extreme inward-oriented state, with the transport domain largely detached from the central scaffold domain on the cytoplasmic side. This domain detachment may be required for substrate binding and release on the intracellular side of the membrane.

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Organizational Affiliation: 

University of Groningen, Zernike Institute for Advanced Materials, Groningen, the Netherlands. [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Neutral amino acid transporter B(0)	A, B, C	541	Homo sapiens	Mutation(s): 0  Gene Names: SLC1A5, ASCT2, M7V1, RDR, RDRC
Membrane protein Mpstruc	Group:  TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group:  Solute Carrier (SLC) Transporter Superfamily	Protein:  Neutral amino acid transporter ASCT2, inward-oriented state
Find proteins for Q15758 (Homo sapiens) Explore Q15758  Go to UniProtKB:  Q15758
NIH Common Fund Data Resources
PHAROS:  Q15758 GTEx:  ENSG00000105281

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GLN	A, B, C	GLUTAMINE C5 H10 N2 O3 ZDXPYRJPNDTMRX-VKHMYHEASA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.85 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2018-04-19 
• Released Date: 2018-06-13 
Deposition Author(s): Garaeva, A.A., Oostergetel, G.T., Gati, C., Guskov, A., Paulino, C., Slotboom, D.J.

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Funding Organization	Location	Grant Number
	Netherlands	NWO Vidi 723.014.002
	Netherlands	NWO Veni 722.017.001
European Commission	Netherlands	MSCI 749732
European Commission	Netherlands	ERC 282083
	Netherlands	NWO Vici 865.11.001

Revision History 

• Version 1.0: 2018-06-13
  Type: Initial release
  
• Version 1.1: 2018-06-20
  Changes: Data collection, Database references
• Version 1.2: 2019-12-11
  Changes: Other