6S7V | pdb_00006s7v

Lipoteichoic acids flippase LtaA

• PDB DOI: https://doi.org/10.2210/pdb6S7V/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Staphylococcus aureus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2019-07-06 Released: 2020-04-22 
• Deposition Author(s): Zhang, B., Perez, C.
• Funding Organization(s): Swiss National Science Foundation

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free: 
  0.289 (Depositor), 0.293 (DCC) 
• R-Value Work: 
  0.271 (Depositor), 0.273 (DCC) 
• R-Value Observed: 
  0.271 (Depositor) 

Literature

Structure of a proton-dependent lipid transporter involved in lipoteichoic acids biosynthesis.

Zhang, B., Liu, X., Lambert, E., Mas, G., Hiller, S., Veening, J.W., Perez, C.

(2020) Nat Struct Mol Biol 27: 561-569

• PubMed: 32367070 
• DOI: https://doi.org/10.1038/s41594-020-0425-5
• Primary Citation Related Structures: 
  6S7V


• PubMed Abstract: 
  

  Lipoteichoic acids (LTAs) are essential cell-wall components in Gram-positive bacteria, including the human pathogen Staphylococcus aureus, contributing to cell adhesion, cell division and antibiotic resistance. Genetic evidence has suggested that LtaA is the flippase that mediates the translocation of the lipid-linked disaccharide that anchors LTA to the cell membrane, a rate-limiting step in S. aureus LTA biogenesis. Here, we present the structure of LtaA, describe its flipping mechanism and show its functional relevance for S. aureus fitness. We demonstrate that LtaA is a proton-coupled antiporter flippase that contributes to S. aureus survival under physiological acidic conditions. Our results provide foundations for the development of new strategies to counteract S. aureus infections.

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Organizational Affiliation: 
• Biozentrum, University of Basel, Basel, Switzerland.
Department of Fundamental Microbiology, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland.
Biozentrum, University of Basel, Basel, Switzerland. [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 42.5 kDa 
• Atom Count: 3,001 
• Modeled Residue Count: 378 
• Deposited Residue Count: 378 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MFS transporter	A	378	Staphylococcus aureus	Mutation(s): 0  Gene Names: BTN44_07740, FA040_03480, RK64_05390 Membrane Entity: Yes
UniProt
Find proteins for Q2FZP8 (Staphylococcus aureus (strain NCTC 8325 / PS 47)) Explore Q2FZP8  Go to UniProtKB:  Q2FZP8

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free:  0.289 (Depositor), 0.293 (DCC) 
• R-Value Work:  0.271 (Depositor), 0.273 (DCC) 
• R-Value Observed: 0.271 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.39	α = 90
b = 162.47	β = 90
c = 191.05	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
SHELXDE	phasing
PDB_EXTRACT	data extraction

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2020-04-22 
Deposition Author(s): Zhang, B., Perez, C.

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Funding Organization	Location	Grant Number
Swiss National Science Foundation	Switzerland	PP00P3_170607

Revision History  

• Version 1.0: 2020-04-22
  Type: Initial release
  
• Version 1.1: 2020-05-13
  Changes: Database references
• Version 1.2: 2020-06-24
  Changes: Database references
• Version 1.3: 2024-05-15
  Changes: Data collection, Database references