Skip to ContentSkip to Navigation
About usNews and EventsNews articles

A proteomics approach to inner membrane biogenesis in Escherichia coli

26 February 2010

Promotie: mw. C.E. Price, 16.15 uur, Academiegebouw, Broerstraat 5, Groningen
Proefschrift: A proteomics approach to inner membrane biogenesis in Escherichia coli
Promotor(s): prof.dr. A.J.M. Driessen
Faculteit: Wiskunde en Natuurwetenschappen
Contact: Claire Price, tel. 050-368 2415, e-mail: c.e.price@rug.nl

A proteomics approach to inner membrane biogenesis in Escherichia coli

Claire Price investigated the role of the Escherichia coli YidC protein in membrane biogenesis with a focus on subunits of respiratory complexes. A directed proteomics approach was applied to investigate the effect of YidC depletion on components of the respiratory chains expressed under anaerobic conditions. It was found that YidC depletion under these conditions caused a cessation in growth and that a number of respiratory complexes were negatively affected. This was further investigated, where metabolic labeling with 15N/14N was employed to study the membrane proteome-wide changes upon YidC depletion under both aerobic and anaerobic respiratory conditions. This allowed the identification of putative YidC substrates and the in vitro insertion requirements of subunit K of complex I were characterized. It was found that NuoK absolutely requires the Sec translocase and YidC for insertion. Essential membrane-embedded negative charges contained in NuoK were shown to confer YidC-dependence. Using the mechanosensitive channel of large conductance, MscL, it was shown further that in vitro translation and membrane insertion systems can be exploited to produce fully active oligomeric protein complexes in a cell-free system. Since YidC has been shown to interact with the SecDFYajC complex the effect of SecDFYajC depletion on the membrane proteome of E. coli was also investigated. The findings are discussed in the context of our current knowledge of the Oxa1/Alb3/YidC family of proteins with particular focus on the diverse functioning of YidC in membrane biogenesis in E. coli.

Last modified:15 September 2017 3.40 p.m.
printView this page in: Nederlands

More news

  • 11 July 2019

    Major companies’ annual reports too vague about climate impact

    Many major Dutch companies publish extensive information about climate impact in their annual reports. However, very few companies provide concrete, detailed information about their own CO2 emissions, the impact of climate change on their business...

  • 08 July 2019

    UG permanently closes Yantai project

    The University of Groningen (UG) has permanently closed the project aimed at creating a branch campus in Yantai. Discussions were held with China Agricultural University, the city of Yantai and the Province of Shandong.

  • 03 July 2019

    Cheap train tickets boost public transport use but reduce customer satisfaction

    Offers of cheap single train tickets through retailers such as Kruidvat or Etos have a positive impact on the number of kilometres travelled by rail. This impact is much bigger than that of more general TV, newspaper or magazine advertising. However,...