5UWA

Structure of E. coli phospholipid binding protein MlaC


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.501 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.138 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Architectures of Lipid Transport Systems for the Bacterial Outer Membrane.

Ekiert, D.C.Bhabha, G.Isom, G.L.Greenan, G.Ovchinnikov, S.Henderson, I.R.Cox, J.S.Vale, R.D.

(2017) Cell 169: 273-285.e17

  • DOI: 10.1016/j.cell.2017.03.019
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • How phospholipids are trafficked between the bacterial inner and outer membranes through the hydrophilic space of the periplasm is not known. We report that members of the mammalian cell entry (MCE) protein family form hexameric assemblies with a cen ...

    How phospholipids are trafficked between the bacterial inner and outer membranes through the hydrophilic space of the periplasm is not known. We report that members of the mammalian cell entry (MCE) protein family form hexameric assemblies with a central channel capable of mediating lipid transport. The E. coli MCE protein, MlaD, forms a ring associated with an ABC transporter complex in the inner membrane. A soluble lipid-binding protein, MlaC, ferries lipids between MlaD and an outer membrane protein complex. In contrast, EM structures of two other E. coli MCE proteins show that YebT forms an elongated tube consisting of seven stacked MCE rings, and PqiB adopts a syringe-like architecture. Both YebT and PqiB create channels of sufficient length to span the periplasmic space. This work reveals diverse architectures of highly conserved protein-based channels implicated in the transport of lipids between the membranes of bacteria and some eukaryotic organelles.


    Organizational Affiliation

    Department of Cellular and Molecular Pharmacology and the Howard Hughes Medical Institute, The University of California, San Francisco, 600 16(th) Street, San Francisco, CA 94158, USA; Department of Microbiology and Immunology, The University of California, San Francisco, 600 16(th) Street, San Francisco, CA 94158, USA. Electronic address: damian.ekiert@med.nyu.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Probable phospholipid-binding protein MlaC
A, B
203Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: mlaC (yrbC)
Find proteins for P0ADV7 (Escherichia coli (strain K12))
Go to UniProtKB:  P0ADV7
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
8ND
Query on 8ND

Download SDF File 
Download CCD File 
A, B
(2S)-3-(2-aminoethoxy)propane-1,2-diyl dihexadecanoate
C37 H73 N O5
UWTLPHGXKLBELN-DHUJRADRSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.501 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.138 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 33.630α = 90.00
b = 115.890β = 90.00
c = 133.220γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
XDSdata reduction
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesK99GM112982
Damon Runyon Cancer Research FoundationUnited StatesDRG-2140-12
Howard Hughes Medical InstituteUnited States--

Revision History 

  • Version 1.0: 2017-04-12
    Type: Initial release
  • Version 1.1: 2017-04-19
    Type: Database references
  • Version 1.2: 2017-08-09
    Type: Database references
  • Version 1.3: 2017-09-27
    Type: Author supporting evidence