2WIT

CRYSTAL STRUCTURE OF THE SODIUM-COUPLED GLYCINE BETAINE SYMPORTER BETP FROM CORYNEBACTERIUM GLUTAMICUM WITH BOUND SUBSTRATE

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.35 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.257 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history. 

Literature

Molecular Basis of Transport and Regulation in the Na(+)/Betaine Symporter Betp.

Ressl, S., Terwisscha Van Scheltinga, A.C., Vonrhein, C., Ott, V., Ziegler, C.

(2009) Nature 458: 47

  • DOI: 10.1038/nature07819

  • PubMed Abstract: 

    • Osmoregulated transporters sense intracellular osmotic pressure and respond to hyperosmotic stress by accumulation of osmolytes to restore normal hydration levels. Here we report the determination of the X-ray structure of a member of the family of b ...

    Osmoregulated transporters sense intracellular osmotic pressure and respond to hyperosmotic stress by accumulation of osmolytes to restore normal hydration levels. Here we report the determination of the X-ray structure of a member of the family of betaine/choline/carnitine transporters, the Na(+)-coupled symporter BetP from Corynebacterium glutamicum, which is a highly effective osmoregulated uptake system for glycine betaine. Glycine betaine is bound in a tryptophan box occluded from both sides of the membrane with aromatic side chains lining the transport pathway. BetP has the same overall fold as three unrelated Na(+)-coupled symporters. Whereas these are crystallized in either the outward-facing or the inward-facing conformation, the BetP structure reveals a unique intermediate conformation in the Na(+)-coupled transport cycle. The trimeric architecture of BetP and the break in three-fold symmetry by the osmosensing C-terminal helices suggest a regulatory mechanism of Na(+)-coupled osmolyte transport to counteract osmotic stress.

    Organizational Affiliation: 

    Max Planck Institute of Biophysics, Department of Structural Biology, 60438 Frankfurt am Main, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLYCINE BETAINE TRANSPORTER BETP
A, B, C
566Corynebacterium glutamicum (strain ATCC 13032 / DSM 20300 / JCM 1318 / LMG 3730 / NCIMB 10025)Mutation(s): 3 
Gene Names: betP
Membrane protein
mpstruct		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Betaine/Choline/Carnitine Transporter (BCCT) Family		Protein: 
BetP glycine betaine transporter
Find proteins for P54582 (Corynebacterium glutamicum (strain ATCC 13032 / DSM 20300 / JCM 1318 / LMG 3730 / NCIMB 10025))
Go to UniProtKB:  P54582
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BET
Query on BET
Download SDF File 
Download CCD File 
A, B, C
TRIMETHYL GLYCINE
C5 H12 N O2
KWIUHFFTVRNATP-UHFFFAOYSA-O
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.35 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.257 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 118.095α = 90.00
b = 129.422β = 90.00
c = 182.942γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
SHARPphasing
SHELXDphasing
BUSTER-TNTrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-05-26
    Type: Initial release
  • Version 1.1: 2013-01-30
    Type: Database references, Derived calculations, Refinement description, Source and taxonomy, Version format compliance
  • Version 1.2: 2013-03-20
    Type: Database references
  • Version 1.3: 2015-05-13
    Type: Database references