5EG1

Antibacterial peptide ABC transporter McjD with a resolved lipid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.42 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.254 
  • R-Value Observed: 0.254 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

Structural and Functional Basis for Lipid Synergy on the Activity of the Antibacterial Peptide ABC Transporter McjD.

Mehmood, S.Corradi, V.Choudhury, H.G.Hussain, R.Becker, P.Axford, D.Zirah, S.Rebuffat, S.Tieleman, D.P.Robinson, C.V.Beis, K.

(2016) J Biol Chem 291: 21656-21668

  • DOI: https://doi.org/10.1074/jbc.M116.732107
  • Primary Citation of Related Structures:  
    5EG1

  • PubMed Abstract: 

    The lipid bilayer is a dynamic environment that consists of a mixture of lipids with different properties that regulate the function of membrane proteins; these lipids are either annular, masking the protein hydrophobic surface, or specific lipids, essential for protein function. In this study, using tandem mass spectrometry, we have identified specific lipids associated with the Escherichia coli ABC transporter McjD, which translocates the antibacterial peptide MccJ25. Using non-denaturing mass spectrometry, we show that McjD in complex with MccJ25 survives the gas phase. Partial delipidation of McjD resulted in reduced ATPase activity and thermostability as shown by circular dichroism, both of which could be restored upon addition of defined E. coli lipids. We have resolved a phosphatidylglycerol lipid associated with McjD at 3.4 Å resolution, whereas molecular dynamic simulations carried out in different lipid environments assessed the binding of specific lipids to McjD. Combined, our data show a synergistic effect of zwitterionic and negatively charged lipids on the activity of McjD; the zwitterionic lipids provide structural stability to McjD, whereas the negatively charged lipids are essential for its function.


  • Organizational Affiliation

    From the Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Microcin-J25 export ATP-binding/permease protein McjD
A, B
580Escherichia coliMutation(s): 0 
Gene Names: mcjD
Membrane Entity: Yes 
UniProt
Find proteins for Q9X2W0 (Escherichia coli)
Explore Q9X2W0 
Go to UniProtKB:  Q9X2W0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9X2W0
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.42 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.254 
  • R-Value Observed: 0.254 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.98α = 90
b = 109.13β = 90
c = 233.19γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
xia2data reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/H01778X/1

Revision History  (Full details and data files)

  • Version 1.0: 2016-08-31
    Type: Initial release
  • Version 1.1: 2016-09-14
    Changes: Database references
  • Version 1.2: 2016-11-16
    Changes: Database references
  • Version 1.3: 2017-08-30
    Changes: Author supporting evidence
  • Version 1.4: 2024-01-10
    Changes: Data collection, Database references, Derived calculations, Refinement description