Structure of Arabidopsis thaliana sulfate transporter AtSULTR4;1

Experimental Data Snapshot

  • Resolution: 2.75 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Structure and function of an Arabidopsis thaliana sulfate transporter.

Wang, L.Chen, K.Zhou, M.

(2021) Nat Commun 12: 4455-4455

  • DOI: https://doi.org/10.1038/s41467-021-24778-2
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Plant sulfate transporters (SULTR) mediate absorption and distribution of sulfate (SO 4 2- ) and are essential for plant growth; however, our understanding of their structures and functions remains inadequate. Here we present the structure of a SULTR from Arabidopsis thaliana, AtSULTR4;1, in complex with SO 4 2- at an overall resolution of 2.8 Å. AtSULTR4;1 forms a homodimer and has a structural fold typical of the SLC26 family of anion transporters. The bound SO 4 2- is coordinated by side-chain hydroxyls and backbone amides, and further stabilized electrostatically by the conserved Arg393 and two helix dipoles. Proton and SO 4 2- are co-transported by AtSULTR4;1 and a proton gradient significantly enhances SO 4 2- transport. Glu347, which is ~7 Å from the bound SO 4 2- , is required for H + -driven transport. The cytosolic STAS domain interacts with transmembrane domains, and deletion of the STAS domain or mutations to the interface compromises dimer formation and reduces SO 4 2- transport, suggesting a regulatory function of the STAS domain.

  • Organizational Affiliation

    Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sulfate transporter 4.1, chloroplastic
A, B
685Arabidopsis thalianaMutation(s): 0 
Gene Names: SULTR41At5g13550MSH12.1SULTR4;1T6I14_80
Membrane Entity: Yes 
Find proteins for Q9FY46 (Arabidopsis thaliana)
Explore Q9FY46 
Go to UniProtKB:  Q9FY46
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9FY46
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on LBN

Download Ideal Coordinates CCD File 
E [auth A],
J [auth B]
C42 H82 N O8 P
Query on S1P

Download Ideal Coordinates CCD File 
C [auth A],
F [auth A],
G [auth B],
H [auth B]
(2S,3R,4E)-2-amino-3-hydroxyoctadec-4-en-1-yl dihydrogen phosphate
C18 H38 N O5 P
SO4 (Subject of Investigation/LOI)
Query on SO4

Download Ideal Coordinates CCD File 
D [auth A],
I [auth B]
O4 S
Experimental Data & Validation

Experimental Data

  • Resolution: 2.75 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)United StatesDK122784
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesHL086392

Revision History  (Full details and data files)

  • Version 1.0: 2021-08-11
    Type: Initial release