7O23

C-terminal head domain of the trimeric autotransporter adhesin BpaC from Burkholderia pseudomallei fused to a GCN4 anchor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.184 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The C-terminal head domain of Burkholderia pseudomallei BpaC has a striking hydrophilic core with an extensive solvent network.

Kiessling, A.R.Harris, S.A.Weimer, K.M.Wells, G.Goldman, A.

(2022) Mol Microbiol 118: 77-91

  • DOI: 10.1111/mmi.14953
  • Primary Citation of Related Structures:  
    7O23

  • PubMed Abstract: 
  • Gram-negative pathogens like Burkholderia pseudomallei use trimeric autotransporter adhesins such as BpaC as key molecules in their pathogenicity. Our 1.4 Å crystal structure of the membrane-proximal part of the BpaC head domain shows that the domain is exclusively made of left-handed parallel β-roll repeats ...

    Gram-negative pathogens like Burkholderia pseudomallei use trimeric autotransporter adhesins such as BpaC as key molecules in their pathogenicity. Our 1.4 Å crystal structure of the membrane-proximal part of the BpaC head domain shows that the domain is exclusively made of left-handed parallel β-roll repeats. This, the largest such structure solved, has two unique features. First, the core, rather than being composed of the canonical hydrophobic Ile and Val, is made up primarily of the hydrophilic Thr and Asn, with two different solvent channels. Second, comparing BpaC to all other left-handed parallel β-roll structures showed that the position of the head domain in the protein correlates with the number and type of charged residues. In BpaC, only negatively charged residues face the solvent-in stark contrast to the primarily positive surface charge of the left-handed parallel β-roll "type" protein, YadA. We propose extending the definitions of these head domains to include the BpaC-like head domain as a separate subtype, based on its unusual sequence, position, and charge. We speculate that the function of left-handed parallel β-roll structures may differ depending on their position in the structure.


    Organizational Affiliation

    MIBS, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Autotransporter adhesin BpaC,Autotransporter adhesin BpaC,General control transcription factor GCN4A351Burkholderia pseudomallei 1026bSaccharomyces cerevisiae S288C
This entity is chimeric
Mutation(s): 0 
Gene Names: bpaCBP1026B_I1575GCN4AAS101AAS3ARG9YEL009C
UniProt
Find proteins for A0A0H3HIJ5 (Burkholderia pseudomallei (strain 1026b))
Explore A0A0H3HIJ5 
Go to UniProtKB:  A0A0H3HIJ5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0H3HIJ5
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

Download Ideal Coordinates CCD File 
D [auth A]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.184 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.39α = 90
b = 57.39β = 90
c = 516.53γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
pointlessdata scaling
Aimlessdata scaling
PHASERphasing
BUCCANEERmodel building
Cootmodel building

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
H2020 Marie Curie Actions of the European CommissionUnited Kingdom765042
Biotechnology and Biological Sciences Research Council (BBSRC)United KingdomBB/M023281/1

Revision History  (Full details and data files)

  • Version 1.0: 2022-06-29
    Type: Initial release
  • Version 1.1: 2022-07-20
    Changes: Database references