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 

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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: 10.1038/nature17199
  • Primary Citation of Related Structures:  
    5D0Q, 5D0O

  • 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 assem ...

    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
MoleculeChainsSequence LengthOrganismDetailsImage
Outer membrane protein assembly factor BamAA810Escherichia coliMutation(s): 0 
Gene Names: bamAyaeTyzzNyzzYb0177JW0172
Find proteins for P0A940 (Escherichia coli (strain K12))
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Go to UniProtKB:  P0A940
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Outer membrane protein assembly factor BamBB392Escherichia coliMutation(s): 0 
Gene Names: bamByfgLb2512JW2496
Find proteins for P77774 (Escherichia coli (strain K12))
Explore P77774 
Go to UniProtKB:  P77774
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Outer membrane protein assembly factor BamCC344Escherichia coliMutation(s): 0 
Gene Names: bamCdapXnlpBb2477JW2462
Find proteins for P0A903 (Escherichia coli (strain K12))
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Go to UniProtKB:  P0A903
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Outer membrane protein assembly factor BamDD245Escherichia coliMutation(s): 0 
Gene Names: bamDyfiOb2595JW2577
Find proteins for P0AC02 (Escherichia coli (strain K12))
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Go to UniProtKB:  P0AC02
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  • Reference Sequence
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Outer membrane protein assembly factor BamEE123Escherichia coliMutation(s): 0 
Gene Names: bamEsmpAb2617JW2598
Find proteins for P0A937 (Escherichia coli (strain K12))
Explore P0A937 
Go to UniProtKB:  P0A937
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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 

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