• +1 865.574.6308

Omar Demerdash

Liane B. Russel Distinguished Fellow

Email: demerdashon@ornl.gov
Work: 865.241.7687

Address:
E351, Bldg. 2040
1 Bethel Valley Rd.
Oak Ridge, TN 37831-6309



Websites

LinkedIn: https://www.linkedin.com/in/omar-demerdash-258160133

Education and Biography

Postdoctoral Scholar in Chemistry, University of California-Berkeley, 2013-2017
Ph.D. in Biophysics, University of Wisconsin-Madison, 2004-2010
M.D., University of Wisconsin-Madison, 2002-2004, 2010-2013
B.S. in Molecular Biology, University of Wisconsin-Madison, 1998-2002

Research Interests


 

 Developing a quantitative understanding of the structure, function, and dynamics of protein-protein, protein-ligand, and protein-nucleic acid interactions, and how such interactions modulate protein function, is at the heart of a molecular-level understanding of disease and how to target mutant or otherwise pathogenic proteins with drugs that have a low side-effect profile.  Towards this end, computational strategies to predict high-specificity binding of drug ligands to proteins and strategies to simulate how the binding of such ligands modulates protein function are being developed, with a specific focus on targeted cancer therapy as a replacement for chemotherapy.  Specifically, machine learning methods using a range of physicochemical features will be applied to the development of highly accurate scoring functions for prediction of drug ligand binding sites.  After this stage, advanced sampling methods such as the Markov state model and features calculated therefrom, e.g. mutual information among protein residues and dynamical, structural, and topological features of metastable basins, or direct observation of a modulatory effect, will be used to assess allostery, that is, the ability of a binding event at one site to modulate the active site function.  Targeting allosteric sites holds the promise of greater specificity and a lower side effect profile compared with the standard approach of targeted cancer therapy involving inhibition of the active site.

 

Publications


 

  • Demerdash O, Wang L-P, Head-Gordon T. Advanced models for water simulations.  Wiley Interdisciplinary Reviews-Computational Molecular Science, 2018, 8(1): e1355.

  • Demerdash O, Mao Y, Liu T, Head-Gordon M, Head-Gordon T. Assessing many-body contributions to intermolecular interactions of the AMOEBA force field using energy decomposition analysis of electronic structure calculations.  Journal of Chemical Physics, 2017, 147(16): 161721.

  • Demerdash O, Head-Gordon T. Convergence of the many-body expansion for energy and forces for classical polarizable models in the condensed phase. Journal of Chemical Theory and Computation, 2016, 12(8):  3884-3893.

  • Mao Y*, Demerdash O*, Head-Gordon M, Head-Gordon T. Assessing ion-water interactions in the AMOEBA force field using energy decomposition analysis of electronic structure calculations.  Journal of Chemical Theory and Computation, 2016, 12(11): 5422-5437.

  • Demerdash ONA, Mitchell JC.  Using physical potentials and learned models to distinguish native binding interfaces from de novodesigned interfacesthat do not bind.   Proteins:  Structure, Function, Bioinformatics, 2013, 81(11):  1919-1930.

  • Demerdash ONA, Daily MD, Mitchell JC. Structure-based predictive models for allosteric hot spots.  PLoS Computational Biology, 2009, 5(10):  e1000531