Research Interests

Our Group uses computer simulation approaches to study biomedically relevant biological systems, with emphasis on the following topics: spatiotemporal membrane-organization of cell signaling components, membrane permeation, membrane-organized signaling complexes, interfacial interactions, allostery in surface-bound protein complexes, and drug design. These studies are driven by the need to understand and exploit the principles of specificity in cell signaling and molecular transport, and the opportunity created by the advent of petaflop computational resources coupled with major progresses in coarse-grained modeling. These resources will enable us to simulate processes and systems in a wide range of time and length scales, so that normal and aberrant properties of protein-protein and protein-membrane complexes can be studied at the atomic, molecular and supramolecular levels of detail. The results from such studies will shed light on, for exmaple, the basis of allosteric communication in signaling complexes and molecular recognition. To this end, we develop and apply a variety of computational techniques, including classical and advanced molecular and Brownian dynamics simulations, structural bioinformatics, and binding free energy calculations.





Resources

Our lab currently has a 384-core Linux Cluster, a high-end (48GB) workstation dedicated for visualization of large trajectory files, and six 8-core Dell workstations. We also have access to the TeraGrid (especially TACC).

Recent Publications

  • Grant BJ, Lukman S, Hocker H, Sayyah J, Heller Brown J, McCammon JA, Gorfe AA. Novel Allosteric Sites on Ras for Lead Generation. PLoS ONE, 2011, 6, e25711. 

  • Durrant JD, Cao R, Gorfe AA, Zhu W, Li J, Sankovsky A, Oldfield E, McCammon JA. Non-Bisphosphonate Inhibitors of Isoprenoid Biosynthesis Identified via Computer-Aided Drug Design. Chemical Biology and Drug Design, 2011, 78:323-32.. 

  • Zhou Y, Lu B-Z and Gorfe AA. Continuum Electromechanical Modeling of Protein-Membrane Interaction. Physical Review E, 2010, 82:041923-041928. 

  • Grant BJ, McCammon JA and Gorfe AA. Conformational Selection in G-proteins: Lessons from Ras and Rho (Featured Article). Biophys J, 2010, 99:L87-L89 . 

  • Janosi L and Gorfe AA. Segregation of negatively charged phospholipids by the polycationic and farnesylated membrane anchor of Kras. Biophys J, 2010, 99:3666-3674 . 

  • Janosi L and Gorfe AA. Simulating POPC and POPC/POPG bilayers: Conserved packing and altered surface reactivity. J Chem Theory & Comput, 2010, 16:3267-3273 . 

  • Janosi L and Gorfe AA. Importance of the sphingosine base double bond geometry for the structural and thermodynamic properties of sphingomyelin bilayers (Featured Article). Biophys J, 2010, 99 (9):2957-2966 . 

  • Lukman S, Grant B, Gorfe AA, Grant G and McCammon JA. The distinct conformational dynamics of K-ras and H-ras A59G. PLoS Comput Biol 2010, 6:e1000922 . 

  • Sayyed-Ahmad A, Lichtenberger LM and Gorfe AA. Structure and Dynamics of Cholic Acid and Dodecylphosphocholine−Cholic Acid Aggregates. Langmuir 2010, 26:13407-13414. 

  • Abankwa D, Gorfe AA, Inder K and Hancock JF. Ras membrane orientation and nanodomain localization generate isoform diversity. Proc Natl Ac Sc USA 2010, 107:1130-1135. 

  • Gorfe AA. Mechanisms of allostery and membrane attachment in Ras GTPases: implications for anti-cancer drug discovery. Curr Med Chem 2010, 17:1-9. 

  • Grant B, Gorfe AA, and McCammon JA. Large conformational changes in proteins: signaling and other functions . Curr Opin Struct Biol 2010, 20:142-147. 

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