The high-resolution and new form crystal structure of BamA POTRA4-5 from E.coli

Experimental Data Snapshot

  • Resolution: 1.50 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.147 
  • R-Value Observed: 0.149 

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High-resolution structure of a new crystal form of BamA POTRA4-5 from Escherichia coli.

Zhang, H.Gao, Z.Q.Hou, H.F.Xu, J.H.Li, L.F.Su, X.D.Dong, Y.H.

(2011) Acta Crystallogr Sect F Struct Biol Cryst Commun 67: 734-738

  • DOI: https://doi.org/10.1107/S1744309111014254
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    In Escherichia coli, the BAM complex is employed to mediate correct folding of the outer membrane (OM) proteins into β-barrels and their insertion into the OM. BamA, which is an essential component of the complex, consists of a C-terminal transmembrane region and five N-terminal polypeptide transport-associated (POTRA) domains. Although deletion studies have shown that each of the POTRA domains plays an important role in the process of BAM complex formation, only POTRA5 is essential for cell viability. Here, the crystal structure of POTRA4-5 has been determined to 1.50 Å resolution with an R factor of 14.7% and an Rfree of 18.9%.

  • Organizational Affiliation

    National Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Science, Peking University, Beijing 100871, People's Republic of China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Outer membrane protein assembly complex, YaeT protein189Escherichia coli K-12Mutation(s): 0 
Gene Names: EcDH1_3426YAET
Membrane Entity: Yes 
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
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.50 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.147 
  • R-Value Observed: 0.149 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 137.53α = 90
b = 39.005β = 101
c = 32.561γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-08-10
    Type: Initial release
  • Version 1.1: 2023-11-01
    Changes: Data collection, Database references, Refinement description