5I20

Crystal structure of protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for amino acid export by DMT superfamily transporter YddG.

Tsuchiya, H.Doki, S.Takemoto, M.Ikuta, T.Higuchi, T.Fukui, K.Usuda, Y.Tabuchi, E.Nagatoishi, S.Tsumoto, K.Nishizawa, T.Ito, K.Dohmae, N.Ishitani, R.Nureki, O.

(2016) Nature 534: 417-420

  • DOI: 10.1038/nature17991

  • PubMed Abstract: 
  • The drug/metabolite transporter (DMT) superfamily is a large group of membrane transporters ubiquitously found in eukaryotes, bacteria and archaea, and includes exporters for a remarkably wide range of substrates, such as toxic compounds and metaboli ...

    The drug/metabolite transporter (DMT) superfamily is a large group of membrane transporters ubiquitously found in eukaryotes, bacteria and archaea, and includes exporters for a remarkably wide range of substrates, such as toxic compounds and metabolites. YddG is a bacterial DMT protein that expels aromatic amino acids and exogenous toxic compounds, thereby contributing to cellular homeostasis. Here we present structural and functional analyses of YddG. Using liposome-based analyses, we show that Escherichia coli and Starkeya novella YddG export various amino acids. The crystal structure of S. novella YddG at 2.4 Å resolution reveals a new membrane transporter topology, with ten transmembrane segments in an outward-facing state. The overall structure is basket-shaped, with a large substrate-binding cavity at the centre of the molecule, and is composed of inverted structural repeats related by two-fold pseudo-symmetry. On the basis of this intramolecular symmetry, we propose a structural model for the inward-facing state and a mechanism of the conformational change for substrate transport, which we confirmed by biochemical analyses. These findings provide a structural basis for the mechanism of transport of DMT superfamily proteins.


    Organizational Affiliation

    Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Uncharacterized protein
A, B, C, D, E, F
298Starkeya novella (strain ATCC 8093 / DSM 506 / CCM 1077 / IAM 12100 / NBRC 12443 / NCIB 9113)Mutation(s): 0 
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Drug/Metabolite Transporter (DMT) Superfamily
Protein: 
YddG aromatic amino acid exporter
Find proteins for D7A5Q8 (Starkeya novella (strain ATCC 8093 / DSM 506 / CCM 1077 / IAM 12100 / NBRC 12443 / NCIB 9113))
Go to UniProtKB:  D7A5Q8
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OLC
Query on OLC

Download SDF File 
Download CCD File 
A, B, C, D, E
(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
1-Oleoyl-R-glycerol
C21 H40 O4
RZRNAYUHWVFMIP-GDCKJWNLSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.226 
  • Space Group: P 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 105.840α = 90.00
b = 84.650β = 108.46
c = 112.250γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-06-01
    Type: Initial release
  • Version 1.1: 2016-06-22
    Type: Database references