Skip to ContentSkip to Navigation
About usNews and EventsNews articles

A proteomics approach to inner membrane biogenesis in Escherichia coli

26 February 2010

PhD ceremony: Ms. C.E. Price, 16.15 uur, Academiegebouw, Broerstraat 5, Groningen

Thesis: A proteomics approach to inner membrane biogenesis in Escherichia coli

Promotor(s): prof. A.J.M. Driessen

Faculty: Mathematics and Natural Sciences


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:17 November 2015 12.59 p.m.

More news

  • 23 April 2019

    From paperclip to patent

    How is it possible that an albatross doesn’t crash and die when it lands? And how come its large wings don’t break due to air resistance? That is what you would expect, according to the laws of aerodynamics. However, Professor Eize Stamhuis has discovered...

  • 17 April 2019

    Why lightning often strikes twice

    In contrast to popular belief, lightning often does strike twice, but the reason why a lightning channel is ‘reused’ has remained a mystery. Now, an international research team led by the University of Groningen has used the LOFAR radio telescope to...

  • 16 April 2019

    Still going strong after four decades

    On March 29th professor of Applied Physics Jeff de Hosson was offered a farewell symposium, a few months after his official retirement date near the close of 2018. ‘But 29 March was the 100th birthday of Jan Francken, my predecessor.’ Besides, De Hosson...