6T1W

Structure of E. coli BamA in complex with lipoprotein RcsF


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.79 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.281 
  • R-Value Observed: 0.283 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural insight into the formation of lipoprotein-beta-barrel complexes.

Rodriguez-Alonso, R.Letoquart, J.Nguyen, V.S.Louis, G.Calabrese, A.N.Iorga, B.I.Radford, S.E.Cho, S.H.Remaut, H.Collet, J.F.

(2020) Nat Chem Biol 16: 1019-1025

  • DOI: 10.1038/s41589-020-0575-0
  • Primary Citation of Related Structures:  
    6T1W

  • PubMed Abstract: 
  • The β-barrel assembly machinery (BAM) inserts outer membrane β-barrel proteins (OMPs) in the outer membrane of Gram-negative bacteria. In Enterobacteriacea, BAM also mediates export of the stress sensor lipoprotein RcsF to the cell surface by assembling RcsF-OMP complexes ...

    The β-barrel assembly machinery (BAM) inserts outer membrane β-barrel proteins (OMPs) in the outer membrane of Gram-negative bacteria. In Enterobacteriacea, BAM also mediates export of the stress sensor lipoprotein RcsF to the cell surface by assembling RcsF-OMP complexes. Here, we report the crystal structure of the key BAM component BamA in complex with RcsF. BamA adopts an inward-open conformation, with the lateral gate to the membrane closed. RcsF is lodged deep within the lumen of the BamA barrel, binding regions proposed to undergo outward and lateral opening during OMP insertion. On the basis of our structural and biochemical data, we propose a push-and-pull model for RcsF export following conformational cycling of BamA, and provide a mechanistic explanation for how RcsF uses its interaction with BamA to detect envelope stress. Our data also suggest that the flux of incoming OMP substrates is involved in the control of BAM activity.


    Organizational Affiliation

    de Duve Institute, Université catholique de Louvain, Brussels, Belgium. jfcollet@uclouvain.be.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Outer membrane protein assembly factor BamAA, B810Escherichia coli K-12Mutation(s): 0 
Gene Names: bamAyaeTyzzNyzzYb0177JW0172
Membrane Entity: Yes 
UniProt
Find proteins for P0A940 (Escherichia coli (strain K12))
Explore P0A940 
Go to UniProtKB:  P0A940
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A940
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Outer membrane lipoprotein RcsFC, D134Escherichia coli K-12Mutation(s): 0 
Gene Names: rcsFb0196JW0192
Membrane Entity: Yes 
UniProt
Find proteins for P69411 (Escherichia coli (strain K12))
Explore P69411 
Go to UniProtKB:  P69411
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69411
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.79 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.281 
  • R-Value Observed: 0.283 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 158.84α = 90
b = 142.53β = 102.61
c = 116.42γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
PHASERphasing
PDB_EXTRACTdata extraction
STARANISOdata scaling

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Research Foundation - FlandersBelgium--
Walloon Excellence in Lifesciences & BIOtechnologyBelgium--

Revision History  (Full details and data files)

  • Version 1.0: 2020-05-13
    Type: Initial release
  • Version 1.1: 2020-07-22
    Changes: Database references
  • Version 1.2: 2020-08-26
    Changes: Database references