8WNS

Cryo EM map of SLC7A10 in the apo state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.42 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Cryo-EM structure of the human Asc-1 transporter complex.

Li, Y.Guo, Y.Broer, A.Dai, L.Brӧer, S.Yan, R.

(2024) Nat Commun 15: 3036-3036

  • DOI: https://doi.org/10.1038/s41467-024-47468-1
  • Primary Citation of Related Structures:  
    8WNS, 8WNT, 8WNY

  • PubMed Abstract: 

    The Alanine-Serine-Cysteine transporter 1 (Asc-1 or SLC7A10) forms a crucial heterodimeric transporter complex with 4F2hc (SLC3A2) through a covalent disulfide bridge. This complex enables the sodium-independent transport of small neutral amino acids, including L-Alanine (L-Ala), Glycine (Gly), and D-Serine (D-Ser), within the central nervous system (CNS). D-Ser and Gly are two key endogenous glutamate co-agonists that activate N-methyl-d-aspartate (NMDA) receptors by binding to the allosteric site. Mice deficient in Asc-1 display severe symptoms such as tremors, ataxia, and seizures, leading to early postnatal death. Despite its physiological importance, the functional mechanism of the Asc-1-4F2hc complex has remained elusive. Here, we present cryo-electron microscopy (cryo-EM) structures of the human Asc-1-4F2hc complex in its apo state, D-Ser bound state, and L-Ala bound state, resolved at 3.6 Å, 3.5 Å, and 3.4 Å, respectively. Through detailed structural analysis and transport assays, we uncover a comprehensive alternating access mechanism that underlies conformational changes in the complex. In summary, our findings reveal the architecture of the Asc-1 and 4F2hc complex and provide valuable insights into substrate recognition and the functional cycle of this essential transporter complex.


  • Organizational Affiliation

    Department of Biochemistry, Key University Laboratory of Metabolism and Health of Guangdong, School of Medicine, Southern University of Science and Technology, Shenzhen, Guangdong Province, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Amino acid transporter heavy chain SLC3A2631Homo sapiensMutation(s): 0 
Gene Names: SLC3A2MDU1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P08195 (Homo sapiens)
Explore P08195 
Go to UniProtKB:  P08195
GTEx:  ENSG00000168003 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08195
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Asc-type amino acid transporter 1523Homo sapiensMutation(s): 0 
Gene Names: SLC7A10ASC1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NS82 (Homo sapiens)
Explore Q9NS82 
Go to UniProtKB:  Q9NS82
PHAROS:  Q9NS82
GTEx:  ENSG00000130876 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NS82
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.42 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.20.1_4487:

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2024-05-15
    Type: Initial release