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Open data
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Basic information
Entry | Database: PDB / ID: 6irt | |||||||||||||||||||||
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Title | human LAT1-4F2hc complex bound with BCH | |||||||||||||||||||||
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![]() | MEMBRANE PROTEIN / transporter | |||||||||||||||||||||
Function / homology | ![]() L-tryptophan transmembrane transporter activity / alanine transport / L-tryptophan transmembrane transport / positive regulation of L-leucine import across plasma membrane / cellular response to L-arginine / thyroid hormone transmembrane transporter activity / neutral L-amino acid secondary active transmembrane transporter activity / amino acid import across plasma membrane / Defective SLC7A7 causes lysinuric protein intolerance (LPI) / methionine transport ...L-tryptophan transmembrane transporter activity / alanine transport / L-tryptophan transmembrane transport / positive regulation of L-leucine import across plasma membrane / cellular response to L-arginine / thyroid hormone transmembrane transporter activity / neutral L-amino acid secondary active transmembrane transporter activity / amino acid import across plasma membrane / Defective SLC7A7 causes lysinuric protein intolerance (LPI) / methionine transport / tyrosine transport / L-histidine transport / apical pole of neuron / aromatic amino acid transmembrane transporter activity / amino acid transport complex / L-leucine import across plasma membrane / L-alanine transmembrane transporter activity / isoleucine transport / L-alanine import across plasma membrane / L-amino acid transmembrane transporter activity / phenylalanine transport / valine transport / amino acid transmembrane transport / L-leucine transmembrane transporter activity / calcium:sodium antiporter activity / L-leucine transport / thyroid hormone transport / proline transport / positive regulation of cytokine production involved in immune response / negative regulation of vascular associated smooth muscle cell apoptotic process / neutral amino acid transport / amino acid transmembrane transporter activity / external side of apical plasma membrane / Amino acid transport across the plasma membrane / neutral L-amino acid transmembrane transporter activity / Tryptophan catabolism / exogenous protein binding / xenobiotic transport / anchoring junction / response to muscle activity / antiporter activity / Basigin interactions / microvillus membrane / amino acid transport / positive regulation of interleukin-4 production / response to exogenous dsRNA / positive regulation of interleukin-17 production / positive regulation of glial cell proliferation / tryptophan transport / transport across blood-brain barrier / response to hyperoxia / cellular response to glucose starvation / basal plasma membrane / liver regeneration / negative regulation of autophagy / positive regulation of type II interferon production / peptide antigen binding / calcium ion transport / double-stranded RNA binding / virus receptor activity / melanosome / basolateral plasma membrane / cellular response to lipopolysaccharide / carbohydrate metabolic process / cadherin binding / apical plasma membrane / symbiont entry into host cell / protein heterodimerization activity / lysosomal membrane / negative regulation of gene expression / intracellular membrane-bounded organelle / synapse / cell surface / protein homodimerization activity / RNA binding / extracellular exosome / nucleoplasm / membrane / plasma membrane / cytosol Similarity search - Function | |||||||||||||||||||||
Biological species | ![]() | |||||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.5 Å | |||||||||||||||||||||
![]() | Yan, R.H. / Zhao, X. / Lei, J.L. / Zhou, Q. | |||||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Structure of the human LAT1-4F2hc heteromeric amino acid transporter complex. Authors: Renhong Yan / Xin Zhao / Jianlin Lei / Qiang Zhou / ![]() 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. LAT1, an antiporter of the ...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. 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. Overexpression of LAT1 has been observed in a wide range of tumour cells, and it is thus a potential target for anti-cancer drugs. 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. 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. 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. | |||||||||||||||||||||
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 177 KB | Display | ![]() |
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PDB format | ![]() | 138.3 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 9722MC ![]() 0678C ![]() 0679C ![]() 9721C ![]() 6irsC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 70160.828 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() | ||||||
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#2: Protein | Mass: 57244.934 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() | ||||||
#3: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source #4: Chemical | #5: Chemical | ChemComp-AUU / ( | Sequence details | Unexpected variation that may be derived from the cDNA library used for subcloning or PCR error | |
-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: human LAT1-4F2hc complex bound with BCH / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT |
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Molecular weight | Value: 0.1 MDa / Experimental value: NO |
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
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 48 e/Å2 / Film or detector model: GATAN K2 QUANTUM (4k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.11.1_2575: / Classification: refinement | ||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Particle selection | Num. of particles selected: 1247297 | ||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 262949 / Algorithm: FOURIER SPACE / Num. of class averages: 1 / Symmetry type: POINT | ||||||||||||||||||||||||
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