Mohamed Ghoneim


Mohamed Ghoneim
  • Associate Researcher Senior, Holmstrom Lab

Contact Info

3007 Haworth Hall

Biography

Hometown: Cairo, Egypt

Education

Ph.D. in Biophysics , University of Illinois, 2015, Urbana - Champaign, IL
M.S. in Chemistry, Kyoto University, 2006, Kyoto, Japan
B.S. in Biophysics, Cairo University, 1999, Giza, Egypt

Research

Over the course of my career, I developed an expertise in single-molecule biophysics of nucleic acid – protein interactions and biomolecular conformational dynamics. I obtained my Doctor of Philosophy in Biophysics from the University of Illinois at Urbana-Champaign, USA, where I used single-molecule multi-color total-internal fluorescence microscopy (TIRFM) to undertake direct real-time investigation of the correlation between the conformational dynamics of a DNA repair protein and binding to damage-containing nucleic acid. As a postdoctoral fellow in the Imperial College London, UK , I investigated the mechanism of nucleosome remodeling by the eukaryotic protein complexes using single-molecule FRET (smFRET). As a research scientist in Saint Louis University, USA, I studied Mechanism of Rad51 filament formation by Rad52 and Rad55-Rad57 in homologous recombination using single-molecule correlative optical trapping – fluorescence microscopy system. I also investigated the orientation of different domains of human RPA on different ssDNA-containing structures using alternating light excitation (ALEX) smFRET. More recently, I started focusing, in the University of Kansas, on investigating the conformational dynamics and interactions of viral RNA using single-molecule techniques.

Selected Publications

  • J. Deveryshetty, A Mistry, S. Pangeni , M. Ghoneim, M. Tokmina-Lukaszewska, V.  Kaushik, S. Karunakaran, A Taddei, T. Ha, B. Bothner, and E. Antony (2025). " Mechanism of Rad51 filament formation by Rad52 and Rad55-Rad57 in homologous recombination ", Nature Communications, 16, 6685, https://doi.org/10.1038/s41467-025-61811-0.
  • M. Ghoneim  and C.A. Musselman (2023). Protocol to prepare doubly labeled fluorescent nucleosomes for single-molecule fluorescence microscopy, STAR Protocols, DOI: 10.1016/j.xpro.2023.102229
  • M. Ghoneim  and C.A. Musselman (2022). Single-molecule characterization of Cy3.5 -Cy5.5 dye pair for FRET studies of nucleic acids and nucleosomes, Journal of Fluorescence, 33, 413–421.
  • J. Tibbs, M. Ghoneim, C.C. Caldwell, T. Buzynski, W. Bowie, E.M. Boehm, M.T. Washington, S.M.A. Tabei, and M. Spies.  (2021). KERA: Analysis Tool for Multi-Process, Multi-State Single-Molecule Data, Nucleic Acids Research, 49 (9), e53.
  • M. Ghoneim, H.A. Fuchs, and C.A. Musselman (2021). Histone tails conformations: A fuzzy affair with DNA, Trends in Biochemical Sciences, 46 (7), 564 – 578.
  • M. Wilson, L. Renault, D.P. Maskell, M. Ghoneim, V.E. Pye, A. Nans, D.S. Rueda, P. Cherepanov and A. Costa (2019). Retroviral integration into nucleosomes through DNA looping and sliding along the histone octamer, Nature Communications, 10, Article number: 4189.
  • O. Willhoft*, M. Ghoneim*, C-L Lin , E.Y.D. Chua, M. Wilkinson, Y. Chaban, R. Ayala, E.A. McCormack, L. Ocloo, D.S. Rueda, and D.B. Wigley (2018). Structure and dynamics of the yeast SWR1 – nucleosome complex, Science, 362 (6411), eaat771.