4C7R

Inward facing conformation of the trimeric betaine transporter BetP in complex with lipids


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Evidence for Functional Lipid Interactions in the Betaine Transporter Betp

Koshy, C.Schweikhard, E.S.Gaertner, R.M.Perez, C.Yildiz, O.Ziegler, C.

(2013) Embo J. 32: 3096

  • DOI: 10.1038/emboj.2013.226

  • PubMed Abstract: 
  • Bilayer lipids contribute to the stability of membrane transporters and are crucially involved in their proper functioning. However, the molecular knowledge of how surrounding lipids affect membrane transport is surprisingly limited and despite its g ...

    Bilayer lipids contribute to the stability of membrane transporters and are crucially involved in their proper functioning. However, the molecular knowledge of how surrounding lipids affect membrane transport is surprisingly limited and despite its general importance is rarely considered in the molecular description of a transport mechanism. One reason is that only few atomic resolution structures of channels or transporters reveal a functional interaction with lipids, which are difficult to detect in X-ray structures per se. Overcoming these difficulties, we report here on a new structure of the osmotic stress-regulated betaine transporter BetP in complex with anionic lipids. This lipid-associated BetP structure is important in the molecular understanding of osmoregulation due to the strong dependence of activity regulation in BetP on the presence of negatively charged lipids. We detected eight resolved palmitoyl-oleoyl phosphatidyl glycerol (PG) lipids mimicking parts of the membrane leaflets and interacting with key residues in transport and regulation. The lipid-protein interactions observed here in structural detail in BetP provide molecular insights into the role of lipids in osmoregulated secondary transport.


    Related Citations: 
    • Alternating-Access Mechanism in Conformationally Asymmetric Trimers of the Betaine Transporter Betp.
      Perez, C.,Koshy, C.,Yildiz, O.,Ziegler, C.
      (2012) Nature 490: 126


    Organizational Affiliation

    Department of Structural Biology, Max-Planck Institute of Biophysics, 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 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PGT
Query on PGT

Download SDF File 
Download CCD File 
A, B, C
(1S)-2-{[{[(2R)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL STEARATE
PHOSPHATIDYLGLYCEROL; 1-PALMITOYL-2-OLEOYL-SN-GLYCERO-3-[PHOSPHO-RAC-(1-GLYCEROL)](SODIUM SALT)
C40 H79 O10 P
KBPVYRBBONZJHF-AMAPPZPBSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A, B, C
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
CM5
Query on CM5

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Download CCD File 
C
5-CYCLOHEXYL-1-PENTYL-BETA-D-MALTOSIDE
5-CYCLOHEXYLPENTYL 4-O-ALPHA-D-GLUCOPYRANOSYL-BETA-D-GLUCOPYRANOSIDE; CYMAL-5
C23 H42 O11
RVTGFZGNOSKUDA-ZNGNCRBCSA-N
 Ligand Interaction
PEG
Query on PEG

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Download CCD File 
B
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
FLC
Query on FLC

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Download CCD File 
A, B, C
CITRATE ANION
C6 H5 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.212 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 115.560α = 90.00
b = 129.500β = 90.00
c = 167.950γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XSCALEdata scaling
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-10-30
    Type: Initial release
  • Version 1.1: 2013-12-11
    Type: Database references