4K3B

The crystal structure of BamA from Neisseria gonorrhoeae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural insight into the biogenesis of beta-barrel membrane proteins.

Noinaj, N.Kuszak, A.J.Gumbart, J.C.Lukacik, P.Chang, H.Easley, N.C.Lithgow, T.Buchanan, S.K.

(2013) Nature 501: 385-390

  • DOI: 10.1038/nature12521
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • β-barrel membrane proteins are essential for nutrient import, signalling, motility and survival. In Gram-negative bacteria, the β-barrel assembly machinery (BAM) complex is responsible for the biogenesis of β-barrel membrane proteins, with homologous ...

    β-barrel membrane proteins are essential for nutrient import, signalling, motility and survival. In Gram-negative bacteria, the β-barrel assembly machinery (BAM) complex is responsible for the biogenesis of β-barrel membrane proteins, with homologous complexes found in mitochondria and chloroplasts. Here we describe the structure of BamA, the central and essential component of the BAM complex, from two species of bacteria: Neisseria gonorrhoeae and Haemophilus ducreyi. BamA consists of a large periplasmic domain attached to a 16-strand transmembrane β-barrel domain. Three structural features shed light on the mechanism by which BamA catalyses β-barrel assembly. First, the interior cavity is accessible in one BamA structure and conformationally closed in the other. Second, an exterior rim of the β-barrel has a distinctly narrowed hydrophobic surface, locally destabilizing the outer membrane. And third, the β-barrel can undergo lateral opening, suggesting a route from the interior cavity in BamA into the outer membrane.


    Organizational Affiliation

    National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Outer membrane protein assembly factor BamA
A
792Neisseria gonorrhoeae (strain ATCC 700825 / FA 1090)Mutation(s): 0 
Gene Names: bamA
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Omp85-TpsB Outer Membrane Transporter Superfamily
Protein: 
BamA with POTRA domains 1 - 5
Find proteins for Q5F5W8 (Neisseria gonorrhoeae (strain ATCC 700825 / FA 1090))
Go to UniProtKB:  Q5F5W8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.232 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 59.525α = 90.00
b = 270.206β = 90.00
c = 190.618γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data scaling
PHENIXphasing
PHENIXrefinement
SERGUIdata collection
PHENIXmodel building
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-09-04
    Type: Initial release
  • Version 1.1: 2013-09-11
    Type: Database references
  • Version 1.2: 2013-10-02
    Type: Database references