Crystal structure of filamentous hemagglutinin secretion domain

Experimental Data Snapshot

  • Resolution: 1.72 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.146 

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The crystal structure of filamentous hemagglutinin secretion domain and its implications for the two-partner secretion pathway

Clantin, B.Hodak, H.Willery, E.Locht, C.Jacob-Dubuisson, F.Villeret, V.

(2004) Proc Natl Acad Sci U S A 101: 6194-6199

  • DOI: https://doi.org/10.1073/pnas.0400291101
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Filamentous hemagglutinin (FHA), the major 230-kDa adhesin of the whooping cough agent Bordetella pertussis, is one of the most efficiently secreted proteins in Gram-negative bacteria. FHA is secreted by means of the two-partner secretion (TPS) pathway. Several important human, animal, and plant pathogens also secrete adhesins and other virulence factors by using this mode of secretion. A TPS system is composed of two separate proteins, with TpsA the secreted protein and TpsB its associated specific outermembrane transporter. All TPS-secreted proteins contain a distinctive N-proximal module essential for secretion, the TPS domain. We report here the 1.7- A structure of a functionally secreted 30-kDa N-terminal fragment of FHA. It reveals that the TPS domain folds into a beta-helix, with three extrahelical motifs, a beta-hairpin, a four-stranded beta-sheet, and an N-terminal capping, mostly formed by the nonconserved regions of the TPS domain. The structure thus explains why the TPS domain is able to initiate folding of the beta-helical motifs that form the central domain of the adhesin, because it is itself a beta-helical scaffold. It also contains less conserved extrahelical regions most likely involved in specific properties, such as the recognition of the outer-membrane transporter. This structure is representative of the TPS domains found so far in >100 secreted proteins from pathogenic bacteria. It also provides a mechanistic insight into how protein folding may be linked to secretion in the TPS pathway.

  • Organizational Affiliation

    Institut Fédératif de Recherche du Centre National de la Recherche Scientifique 3, Lille Cedex, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Filamentous hemagglutinin301Bordetella pertussisMutation(s): 0 
Find proteins for P12255 (Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251))
Explore P12255 
Go to UniProtKB:  P12255
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP12255
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.72 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.146 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 108.98α = 90
b = 43.04β = 104.07
c = 53.8γ = 90
Software Package:
Software NamePurpose

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-04-13
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-03-13
    Changes: Data collection, Database references, Derived calculations