5I5H

Ecoli global domain 245-586


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.178 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Structural insights into cardiolipin transfer from the Inner membrane to the outer membrane by PbgA in Gram-negative bacteria.

Dong, H.Zhang, Z.Tang, X.Huang, S.Li, H.Peng, B.Dong, C.

(2016) Sci Rep 6: 30815-30815

  • DOI: https://doi.org/10.1038/srep30815
  • Primary Citation of Related Structures:  
    5I5D, 5I5F, 5I5H

  • PubMed Abstract: 

    The outer membrane (OM) of Gram-negative bacteria is a unique asymmetric lipid bilayer in which the outer leaflet is composed of lipopolysaccharide (LPS) and the inner leaflet is formed by glycerophospholipid (GPL). The OM plays a fundamental role in protecting Gram-negative bacteria from harsh environments and toxic compounds. The transport and assembly pathways for phospholipids of bacterial OM are unknown. Cardiolipin (CL) plays an important role in OM biogenesis and pathogenesis, and the inner membrane (IM) protein PbgA, containing five transmembrane domains and a globular domain in periplasm has been recently identified as a CL transporter from the IM to the OM with an unknown mechanism. Here we present the first two crystal structures of soluble periplasmic globular domain of PbgA from S. typhimurium and E. coli, which revealed that the globular domains of PbgA resemble the structures of the arylsulfatase protein family and contains a novel core hydrophobic pocket that may be responsible for binding and transporting CLs. Our structural and functional studies shed an important light on the mechanism of CL transport in Gram-negative bacteria from the IM to the OM, which offers great potential for the development of novel antibiotics against multi-drug resistant bacterial infections.


  • Organizational Affiliation

    Biomedical Research Centre, Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Inner membrane protein YejM586Escherichia coli K-12Mutation(s): 0 
Gene Names: yejMyejNb2188JW2176
Membrane Entity: Yes 
UniProt
Find proteins for P0AD27 (Escherichia coli (strain K12))
Explore P0AD27 
Go to UniProtKB:  P0AD27
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0AD27
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.178 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.86α = 90
b = 56.86β = 90
c = 191.81γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-08-17
    Type: Initial release
  • Version 2.0: 2024-01-10
    Changes: Atomic model, Data collection, Database references, Refinement description