6THA

Crystal structure of human sugar transporter GLUT1 (SLC2A1) in the inward conformation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Structural comparison of GLUT1 to GLUT3 reveal transport regulation mechanism in sugar porter family.

Custodio, T.F.Paulsen, P.A.Frain, K.M.Pedersen, B.P.

(2021) Life Sci Alliance 4

  • DOI: 10.26508/lsa.202000858
  • Primary Citation of Related Structures:  
    6THA

  • PubMed Abstract: 
  • The human glucose transporters GLUT1 and GLUT3 have a central role in glucose uptake as canonical members of the Sugar Porter (SP) family. GLUT1 and GLUT3 share a fully conserved substrate-binding site with identical substrate coordination, but differ significantly in transport affinity in line with their physiological function ...

    The human glucose transporters GLUT1 and GLUT3 have a central role in glucose uptake as canonical members of the Sugar Porter (SP) family. GLUT1 and GLUT3 share a fully conserved substrate-binding site with identical substrate coordination, but differ significantly in transport affinity in line with their physiological function. Here, we present a 2.4 Å crystal structure of GLUT1 in an inward open conformation and compare it with GLUT3 using both structural and functional data. Our work shows that interactions between a cytosolic "SP motif" and a conserved "A motif" stabilize the outward conformational state and increases substrate apparent affinity. Furthermore, we identify a previously undescribed Cl - ion site in GLUT1 and an endofacial lipid/glucose binding site which modulate GLUT kinetics. The results provide a possible explanation for the difference between GLUT1 and GLUT3 glucose affinity, imply a general model for the kinetic regulation in GLUTs and suggest a physiological function for the defining SP sequence motif in the SP family.


    Organizational Affiliation

    Aarhus Institute of Advanced Studies, Aarhus University, Aarhus C, Denmark.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Solute carrier family 2, facilitated glucose transporter member 1A496Homo sapiensMutation(s): 0 
Gene Names: SLC2A1GLUT1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P11166 (Homo sapiens)
Explore P11166 
Go to UniProtKB:  P11166
PHAROS:  P11166
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
P33
Query on P33

Download Ideal Coordinates CCD File 
D [auth A]3,6,9,12,15,18-HEXAOXAICOSANE-1,20-DIOL
C14 H30 O8
XPJRQAIZZQMSCM-UHFFFAOYSA-N
 Ligand Interaction
BNG (Subject of Investigation/LOI)
Query on BNG

Download Ideal Coordinates CCD File 
B [auth A], C [auth A]nonyl beta-D-glucopyranoside
C15 H30 O6
QFAPUKLCALRPLH-UXXRCYHCSA-N
 Ligand Interaction
CL (Subject of Investigation/LOI)
Query on CL

Download Ideal Coordinates CCD File 
E [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 120α = 90
b = 102.18β = 98.89
c = 69γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment  



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Danish Council for Independent ResearchDenmarkDFF-4002-00052
European Research CouncilDenmark637372
Other privateDenmarkCF17-0180

Revision History  (Full details and data files)

  • Version 1.0: 2020-11-25
    Type: Initial release
  • Version 1.1: 2021-06-09
    Changes: Database references, Refinement description