5A2N

Crystal structure of the nitrate transporter NRT1.1 from Arabidopsis thaliana.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.70 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.278 
  • R-Value Observed: 0.279 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular Basis of Nitrate Uptake by the Plant Nitrate Transporter Nrt1.1.

Parker, J.L.Newstead, S.

(2014) Nature 507: 68

  • DOI: https://doi.org/10.1038/nature13116
  • Primary Citation of Related Structures:  
    5A2N, 5A2O

  • PubMed Abstract: 

    The NRT1/PTR family of proton-coupled transporters are responsible for nitrogen assimilation in eukaryotes and bacteria through the uptake of peptides. However, in most plant species members of this family have evolved to transport nitrate as well as additional secondary metabolites and hormones. In response to falling nitrate levels, NRT1.1 is phosphorylated on an intracellular threonine that switches the transporter from a low-affinity to high-affinity state. Here we present both the apo and nitrate-bound crystal structures of Arabidopsis thaliana NRT1.1, which together with in vitro binding and transport data identify a key role for His 356 in nitrate binding. Our data support a model whereby phosphorylation increases structural flexibility and in turn the rate of transport. Comparison with peptide transporters further reveals how the NRT1/PTR family has evolved to recognize diverse nitrogenous ligands, while maintaining elements of a conserved coupling mechanism within this superfamily of nutrient transporters.


  • Organizational Affiliation

    Department of Biochemistry, University of Oxford, Oxford OX1 3QU, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN NRT1/ PTR FAMILY 6.3
A, B
590Arabidopsis thalianaMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for Q05085 (Arabidopsis thaliana)
Explore Q05085 
Go to UniProtKB:  Q05085
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ05085
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.70 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.278 
  • R-Value Observed: 0.279 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 121.8α = 90
b = 124.03β = 90
c = 153.32γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling
SHELXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-06-17
    Type: Initial release
  • Version 1.1: 2019-02-27
    Changes: Data collection, Experimental preparation, Other
  • Version 1.2: 2024-05-08
    Changes: Data collection, Database references, Other