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The Moraxella IgD-binding protein MID/Hag is an oligomeric autotransporter.

Hallström, Teresia LU ; Müller, Shirley A; Mörgelin, Matthias LU ; Möllenkvist, Andrea LU ; Forsgren, Arne LU and Riesbeck, Kristian LU (2008) In Microbes and Infection 10(4). p.374-381
Abstract
The immunoglobulin D (IgD)-binding protein MID/Hag of the human respiratory pathogen Moraxella catarrhalis is an outer membrane protein of approximately 200kDa belonging to the autotransporter family. MID also functions as an adhesin and hemagglutinin. In the present paper, the ultrastructure of MID was mapped. Using a series of Escherichia coli transformants, the last 210 aa of the C-terminal region were shown to translocate protein MID through the outer membrane suggesting that MID has a beta-barrel structure comprising of 10 transmembrane beta-sheets. Electron microscopy mapping with gold-labelled specific antibodies, and partial unravelling using guanidine hydrochloride showed that the rest of the MID protein forms an approximately... (More)
The immunoglobulin D (IgD)-binding protein MID/Hag of the human respiratory pathogen Moraxella catarrhalis is an outer membrane protein of approximately 200kDa belonging to the autotransporter family. MID also functions as an adhesin and hemagglutinin. In the present paper, the ultrastructure of MID was mapped. Using a series of Escherichia coli transformants, the last 210 aa of the C-terminal region were shown to translocate protein MID through the outer membrane suggesting that MID has a beta-barrel structure comprising of 10 transmembrane beta-sheets. Electron microscopy mapping with gold-labelled specific antibodies, and partial unravelling using guanidine hydrochloride showed that the rest of the MID protein forms an approximately 120nm long, fibrillar structure in which the individual monomers fold back on themselves to expose a globular distal domain at their tips comprising both the IgD-binding (MID962-1200) and adhesive (MID764-913) regions. This positions their N-termini close to the C-terminal membrane spanning domains. Mass measurements by scanning transmission electron microscopy (STEM) verified that the MID molecule is an oligomer. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Microbes and Infection
volume
10
issue
4
pages
374 - 381
publisher
Elsevier
external identifiers
  • wos:000256108300007
  • pmid:18400547
  • scopus:42649120642
ISSN
1769-714X
DOI
10.1016/j.micinf.2007.12.015
language
English
LU publication?
yes
id
ab11f20f-9d95-4c1e-99a8-7ee31aa0aacd (old id 1147561)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/18400547?dopt=Abstract
date added to LUP
2008-05-08 11:41:28
date last changed
2017-01-01 07:39:07
@article{ab11f20f-9d95-4c1e-99a8-7ee31aa0aacd,
  abstract     = {The immunoglobulin D (IgD)-binding protein MID/Hag of the human respiratory pathogen Moraxella catarrhalis is an outer membrane protein of approximately 200kDa belonging to the autotransporter family. MID also functions as an adhesin and hemagglutinin. In the present paper, the ultrastructure of MID was mapped. Using a series of Escherichia coli transformants, the last 210 aa of the C-terminal region were shown to translocate protein MID through the outer membrane suggesting that MID has a beta-barrel structure comprising of 10 transmembrane beta-sheets. Electron microscopy mapping with gold-labelled specific antibodies, and partial unravelling using guanidine hydrochloride showed that the rest of the MID protein forms an approximately 120nm long, fibrillar structure in which the individual monomers fold back on themselves to expose a globular distal domain at their tips comprising both the IgD-binding (MID962-1200) and adhesive (MID764-913) regions. This positions their N-termini close to the C-terminal membrane spanning domains. Mass measurements by scanning transmission electron microscopy (STEM) verified that the MID molecule is an oligomer.},
  author       = {Hallström, Teresia and Müller, Shirley A and Mörgelin, Matthias and Möllenkvist, Andrea and Forsgren, Arne and Riesbeck, Kristian},
  issn         = {1769-714X},
  language     = {eng},
  number       = {4},
  pages        = {374--381},
  publisher    = {Elsevier},
  series       = {Microbes and Infection},
  title        = {The Moraxella IgD-binding protein MID/Hag is an oligomeric autotransporter.},
  url          = {http://dx.doi.org/10.1016/j.micinf.2007.12.015},
  volume       = {10},
  year         = {2008},
}