5D0O

BamABCDE complex, outer membrane beta barrel assembly machinery entire complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.276 

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: 10.1038/nature17199
  • Primary Citation of Related Structures:  

  • 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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Outer membrane protein assembly factor BamA
A
810Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: bamA (yaeT, yzzN, yzzY)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Omp85-TpsB Outer Membrane Transporter Superfamily
Protein: 
BamABCDE complex of the Bam β-barrel assembly machine
Find proteins for P0A940 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A940
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Outer membrane protein assembly factor BamB
B
392Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: bamB (yfgL)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Omp85-TpsB Outer Membrane Transporter Superfamily
Protein: 
BamABCDE complex of the Bam β-barrel assembly machine
Find proteins for P77774 (Escherichia coli (strain K12))
Go to UniProtKB:  P77774
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Outer membrane protein assembly factor BamC
C
344Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: bamC (dapX, nlpB)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Omp85-TpsB Outer Membrane Transporter Superfamily
Protein: 
BamABCDE complex of the Bam β-barrel assembly machine
Find proteins for P0A903 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A903
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Outer membrane protein assembly factor BamD
D
245Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: bamD (yfiO)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Omp85-TpsB Outer Membrane Transporter Superfamily
Protein: 
BamABCDE complex of the Bam β-barrel assembly machine
Find proteins for P0AC02 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AC02
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Outer membrane protein assembly factor BamE
E
123Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: bamE (smpA)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Omp85-TpsB Outer Membrane Transporter Superfamily
Protein: 
BamABCDE complex of the Bam β-barrel assembly machine
Find proteins for P0A937 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A937
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.276 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 116.689α = 90.00
b = 116.689β = 90.00
c = 435.192γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
XDSdata reduction
SHELXDEphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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