3SYJ

Crystal structure of the Haemophilus influenzae Hap adhesin

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Crystal structure of the Haemophilus influenzae Hap adhesin reveals an intercellular oligomerization mechanism for bacterial aggregation

Meng, G., Spahich, N., Kenjale, R., Waksman, G., St Geme III, J.W.

(2011) Embo J. 30: 3864-3874

  • DOI: 10.1038/emboj.2011.279

  • PubMed Abstract: 

    • Bacterial biofilms are complex microbial communities that are common in nature and are being recognized increasingly as an important determinant of bacterial virulence. However, the structural determinants of bacterial aggregation and eventual biofil ...

    Bacterial biofilms are complex microbial communities that are common in nature and are being recognized increasingly as an important determinant of bacterial virulence. However, the structural determinants of bacterial aggregation and eventual biofilm formation have been poorly defined. In Gram-negative bacteria, a major subgroup of extracellular proteins called self-associating autotransporters (SAATs) can mediate cell-cell adhesion and facilitate biofilm formation. In this study, we used the Haemophilus influenzae Hap autotransporter as a prototype SAAT to understand how bacteria associate with each other. The crystal structure of the H. influenzae Hap(S) passenger domain (harbouring the SAAT domain) was determined to 2.2 Å by X-ray crystallography, revealing an unprecedented intercellular oligomerization mechanism for cell-cell interaction. The C-terminal SAAT domain folds into a triangular-prism-like structure that can mediate Hap-Hap dimerization and higher degrees of multimerization through its F1-F2 edge and F2 face. The intercellular multimerization can give rise to massive buried surfaces that are required for overcoming the repulsive force between cells, leading to bacterial cell-cell interaction and formation of complex microcolonies.

    Organizational Affiliation: 

    State Key Laboratory of Medical Genomics, Shanghai Institute of Hematology, Rui-Jin Hospital affiliated to Shanghai JiaoTong University School of Medicine, PR China. guoyumeng@shsmu.edu.cn




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Adhesion and penetration protein autotransporter
A
1011Haemophilus influenzaeMutation(s): 0 
Gene Names: hap
EC: 3.4.21.-
Find proteins for P45387 (Haemophilus influenzae)
Go to UniProtKB:  P45387
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.186 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 41.410α = 90.00
b = 137.200β = 90.00
c = 209.580γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
DNAdata collection
PHASERphasing
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2011-07-18 
  • Released Date: 2011-08-24 
  • Deposition Author(s): Meng, G.

Revision History 

  • Version 1.0: 2011-08-24
    Type: Initial release
  • Version 1.1: 2013-07-03
    Type: Database references
  • Version 1.2: 2017-11-08
    Type: Refinement description