6IRT

human LAT1-4F2hc complex bound with BCH


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Structure of the human LAT1-4F2hc heteromeric amino acid transporter complex.

Yan, R.Zhao, X.Lei, J.Zhou, Q.

(2019) Nature 568: 127-130

  • DOI: 10.1038/s41586-019-1011-z
  • Primary Citation of Related Structures:  
    6IRS, 6IRT

  • PubMed Abstract: 
  • The L-type amino acid transporter 1 (LAT1; also known as SLC7A5) catalyses the cross-membrane flux of large neutral amino acids in a sodium- and pH-independent manner 1-3 . LAT1, an antiporter of the amino acid-polyamine-organocation superfamily, also catalyses the permeation of thyroid hormones, pharmaceutical drugs, and hormone precursors such as L-3,4-dihydroxyphenylalanine across membranes 2-6 ...

    The L-type amino acid transporter 1 (LAT1; also known as SLC7A5) catalyses the cross-membrane flux of large neutral amino acids in a sodium- and pH-independent manner 1-3 . LAT1, an antiporter of the amino acid-polyamine-organocation superfamily, also catalyses the permeation of thyroid hormones, pharmaceutical drugs, and hormone precursors such as L-3,4-dihydroxyphenylalanine across membranes 2-6 . Overexpression of LAT1 has been observed in a wide range of tumour cells, and it is thus a potential target for anti-cancer drugs 7-11 . LAT1 forms a heteromeric amino acid transporter complex with 4F2 cell-surface antigen heavy chain (4F2hc; also known as SLC3A2)-a type II membrane glycoprotein that is essential for the stability of LAT1 and for its localization to the plasma membrane 8,9 . Despite extensive cell-based characterization of the LAT1-4F2hc complex and structural determination of its homologues in bacteria, the interactions between LAT1 and 4F2hc and the working mechanism of the complex remain largely unknown 12-19 . Here we report the cryo-electron microscopy structures of human LAT1-4F2hc alone and in complex with the inhibitor 2-amino-2-norbornanecarboxylic acid at resolutions of 3.3 Å and 3.5 Å, respectively. LAT1 exhibits an inward open conformation. Besides a disulfide bond association, LAT1 also interacts extensively with 4F2hc on the extracellular side, within the membrane, and on the intracellular side. Biochemical analysis reveals that 4F2hc is essential for the transport activity of the complex. Together, our characterizations shed light on the architecture of the LAT1-4F2hc complex, and provide insights into its function and the mechanisms through which it might be associated with disease.


    Organizational Affiliation

    Institute of Biology, Westlake Institute for Advanced Study, School of Life Sciences, Westlake University, Hangzhou, China. zhouqiang@westlake.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
4F2 cell-surface antigen heavy chainA647Homo sapiensMutation(s): 0 
Gene Names: SLC3A2hCG_2016598
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for J3KPF3 (Homo sapiens)
Explore J3KPF3 
Go to UniProtKB:  J3KPF3
GTEx:  ENSG00000168003 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupJ3KPF3
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Large neutral amino acids transporter small subunit 1B527Homo sapiensMutation(s): 1 
Gene Names: SLC7A5CD98LCLAT1MPE16
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q01650 (Homo sapiens)
Explore Q01650 
Go to UniProtKB:  Q01650
PHAROS:  Q01650
GTEx:  ENSG00000103257 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ01650
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseC, D, E, F 2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
3PH
Query on 3PH

Download Ideal Coordinates CCD File 
G [auth B],
H [auth B]
1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE
C39 H77 O8 P
YFWHNAWEOZTIPI-DIPNUNPCSA-N
 Ligand Interaction
AUU
Query on AUU

Download Ideal Coordinates CCD File 
I [auth B](1S,2S,4R)-2-aminobicyclo[2.2.1]heptane-2-carboxylic acid
C8 H13 N O2
MPUVBVXDFRDIPT-CHKWXVPMSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Science and Technology (China)China2016YFA0500402
Ministry of Science and Technology (China)China2016YFA0501100
Ministry of Science and Technology (China)China2015CB910101
National Natural Science Foundation of ChinaChina31621092
National Natural Science Foundation of ChinaChina31630017
National Natural Science Foundation of ChinaChina81861138009

Revision History  (Full details and data files)

  • Version 1.0: 2019-03-27
    Type: Initial release
  • Version 1.1: 2019-04-17
    Changes: Data collection, Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary