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The crystal structure of PD1, a Haemophilus surface fibril domain

The crystal structure of PD1, a Haemophilus surface fibril domain The Haemophilus surface fibril (Hsf) is an unusually large trimeric autotransporter adhesin (TAA) expressed by the most virulent strains of H. influenzae. Hsf is known to mediate adhesion between pathogen and host, allowing the establishment of potentially deadly diseases such as epiglottitis, meningitis and pneumonia. While recent research has suggested that this TAA might adopt a novel `hairpin‐like' architecture, the characterization of Hsf has been limited to in silico modelling and electron micrographs, with no high‐resolution structural data available. Here, the crystal structure of Hsf putative domain 1 (PD1) is reported at 3.3 Å resolution. The structure corrects the previous domain annotation by revealing the presence of an unexpected N‐terminal TrpRing domain. PD1 represents the first Hsf domain to be solved, and thus paves the way for further research on the `hairpin‐like' hypothesis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Crystallographica Section F Wiley

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References (35)

Publisher
Wiley
Copyright
Copyright © 2017 Wiley Subscription Services
ISSN
2053-230X
eISSN
2053-230X
DOI
10.1107/S2053230X17001406
pmid
28177321
Publisher site
See Article on Publisher Site

Abstract

The Haemophilus surface fibril (Hsf) is an unusually large trimeric autotransporter adhesin (TAA) expressed by the most virulent strains of H. influenzae. Hsf is known to mediate adhesion between pathogen and host, allowing the establishment of potentially deadly diseases such as epiglottitis, meningitis and pneumonia. While recent research has suggested that this TAA might adopt a novel `hairpin‐like' architecture, the characterization of Hsf has been limited to in silico modelling and electron micrographs, with no high‐resolution structural data available. Here, the crystal structure of Hsf putative domain 1 (PD1) is reported at 3.3 Å resolution. The structure corrects the previous domain annotation by revealing the presence of an unexpected N‐terminal TrpRing domain. PD1 represents the first Hsf domain to be solved, and thus paves the way for further research on the `hairpin‐like' hypothesis.

Journal

Acta Crystallographica Section FWiley

Published: Jan 1, 2017

Keywords: ; ; ; ; ;

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