Imperial College London


Faculty of Natural SciencesDepartment of Life Sciences

Research Associate



+44 (0)20 7594 5316j.demmer Website




Sir Ernst Chain BuildingSouth Kensington Campus





Structural biologist interested in bioenergetics.

  • Research Associate in the group of Thomas Meier since December 2016
  • Dr. rer. nat., Max Planck Institute of Biophysics in Frankfurt, Germany, Department of Molecular Membrane Biology, 2012 - 2016
  • Diplom, Goethe University Frankfurt, Germany, 2012



Demmer JK, Bertsch J, Oeppinger C, et al., 2018, Molecular basis of the flavin-based electron-bifurcating caffeyl-CoA reductase reaction, Febs Letters, Vol:592, ISSN:0014-5793, Pages:332-342

Demmer JK, Chowdhury NP, Selmer T, et al., 2017, The semiquinone swing in the bifurcating electron transferring flavoprotein/butyryl-CoA dehydrogenase complex from Clostridium difficile, Nature Communications, Vol:8, ISSN:2041-1723

Demmer JK, Rupprecht FA, Eisinger ML, et al., 2016, Ligand binding and conformational dynamics in a flavin-based electron-bifurcating enzyme complex revealed by Hydrogen-Deuterium Exchange Mass Spectrometry, Febs Letters, Vol:590, ISSN:0014-5793, Pages:4472-4479

Demmer JK, Huang H, Wang S, et al., 2015, Insights into Flavin-based Electron Bifurcation via the NADH-dependent Reduced Ferredoxin:NADP Oxidoreductase Structure, Journal of Biological Chemistry, Vol:290, Pages:21985-21995

Chowdhury NP, Mowafy AM, Demmer JK, et al., 2014, Studies on the Mechanism of Electron Bifurcation Catalyzed by Electron Transferring Flavoprotein ( Etf) and Butyryl- CoA Dehydrogenase ( Bcd) of Acidaminococcus fermentans*, Journal of Biological Chemistry, Vol:289, Pages:5145-5157

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