5D0O

BamABCDE complex, outer membrane beta barrel assembly machinery entire complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.276 
  • R-Value Observed: 0.278 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural basis of outer membrane protein insertion by the BAM complex.

Gu, Y.Li, H.Dong, H.Zeng, Y.Zhang, Z.Paterson, N.G.Stansfeld, P.J.Wang, Z.Zhang, Y.Wang, W.Dong, C.

(2016) Nature 531: 47-52

  • DOI: https://doi.org/10.1038/nature17199
  • Primary Citation of Related Structures:  
    5D0O, 5D0Q

  • PubMed Abstract: 

    All Gram-negative bacteria, mitochondria and chloroplasts have outer membrane proteins (OMPs) that perform many fundamental biological processes. The OMPs in Gram-negative bacteria are inserted and folded into the outer membrane by the β-barrel assembly machinery (BAM). The mechanism involved is poorly understood, owing to the absence of a structure of the entire BAM complex. Here we report two crystal structures of the Escherichia coli BAM complex in two distinct states: an inward-open state and a lateral-open state. Our structures reveal that the five polypeptide transport-associated domains of BamA form a ring architecture with four associated lipoproteins, BamB-BamE, in the periplasm. Our structural, functional studies and molecular dynamics simulations indicate that these subunits rotate with respect to the integral membrane β-barrel of BamA to induce movement of the β-strands of the barrel and promote insertion of the nascent OMP.


  • Organizational Affiliation

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


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Outer membrane protein assembly factor BamA810Escherichia coliMutation(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  
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UniProt GroupP0A940
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Outer membrane protein assembly factor BamB392Escherichia coliMutation(s): 0 
Gene Names: bamByfgLb2512JW2496
Membrane Entity: Yes 
UniProt
Find proteins for P77774 (Escherichia coli (strain K12))
Explore P77774 
Go to UniProtKB:  P77774
Entity Groups  
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UniProt GroupP77774
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Outer membrane protein assembly factor BamC344Escherichia coliMutation(s): 0 
Gene Names: bamCdapXnlpBb2477JW2462
Membrane Entity: Yes 
UniProt
Find proteins for P0A903 (Escherichia coli (strain K12))
Explore P0A903 
Go to UniProtKB:  P0A903
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UniProt GroupP0A903
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Outer membrane protein assembly factor BamD245Escherichia coliMutation(s): 0 
Gene Names: bamDyfiOb2595JW2577
Membrane Entity: Yes 
UniProt
Find proteins for P0AC02 (Escherichia coli (strain K12))
Explore P0AC02 
Go to UniProtKB:  P0AC02
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UniProt GroupP0AC02
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  • Reference Sequence
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Outer membrane protein assembly factor BamE123Escherichia coliMutation(s): 0 
Gene Names: bamEsmpAb2617JW2598
Membrane Entity: Yes 
UniProt
Find proteins for P0A937 (Escherichia coli (strain K12))
Explore P0A937 
Go to UniProtKB:  P0A937
Entity Groups  
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UniProt GroupP0A937
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.276 
  • R-Value Observed: 0.278 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.689α = 90
b = 116.689β = 90
c = 435.192γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
SHELXDEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-03-09
    Type: Initial release