Research
Our laboratory uses
molecular electron microscopy to study structures of large protein
complexes that function as molecular machines. Our main focus is
related to two fundamental questions in cell biology: How do cells
interact with each other and with their environment, and how do they
obtain the nutrients essential for cell survival? We focus on integral
membrane proteins because they play a crucial role in mediating
information transfer between cells and between compartments within
cells; and they are involved in vital processes such as energy
conversion, sensing, fusion, nutrient and solute uptake. More than 20%
of the genes in the human genome encode membrane-traversing proteins
and so it is critical to study structures of membrane proteins to
unravel important biological and physiological processes. Our model
system is the eye lens, whose cells are rich in junction-forming
membrane proteins and transporters needed for nutrient uptake.
Selected
Publications
Zheng H., Olia A.S., Gonen M., Andrews S., Cingolani G. and Gonen T. (2008) A conformational switch in bacteriophage P22 portal protein primes genome injection. Molecular Cell - In Press.
Reichow L.S. and Gonen T. (2008) Non-canonical binding of calmodulin to aquaporin-0: implications for channel regulation. Submitted.
Andrews, S., Reichow, L.S. and Gonen T. (2008) Electron crystallography of aquaporins. IUBMB Life - In Press.
Gonen T., Hite R.K., Cheng Y., Petre B.M., Kistler J. and Walz T. (2007) Polymorphic assemblies and crystalline arrays of lens tetraspanin MP20. Journal of Molecular Biology - In Press.
Engel A., Fujiyoshi Y., Gonen T. and Walz T. (2007) Junction-forming aquaporins. Current Opinion in Structural Biology - In Press.
Gonen T. and Walz T. (2006) The structure of aquaporins. Quarterly Reviews of Biophysics 39, 4: 361-396.
Gonen T., Cheng Y., Sliz P.,
Hiroaki Y., Fujiyoshi Y., Harrison SC., Walz T (2005) Lipid–protein
interactions in double layered two dimensional crystals of AQP0. Nature
438: 633-638. See also News and Views feature and front cover.
Gonen T., Cheng Y., Kistler
J. and Walz T. (2004) Aquaporin-0 membrane junctions form upon
proteolytic cleavage. Journal of Molecular Biology 342(4):1337-45. See
also front cover.
Gonen T., Sliz P., Cheng Y.,
Kistler J. and Walz T. (2004) Aquaporin-0 membrane junctions reveal the
structure of a closed water pore. Nature. 429 (6988):193-7. See also
News and Views feature.
Grey AC., Jacobs MD., Gonen
T., Kistler J. and Donaldson PJ. (2003) Insertion of MP20 into lens
fibre cell plasma membranes correlates with the formation of an
extracellular diffusion barrier. Experimental Eye Research.
77(5):567-74.
Gonen T., Grey AC., Jacobs
MD., Donaldson PJ. and Kistler J. (2001) MP20, the second most abundant
lens membrane protein and member of the tetraspanin superfamily, joins
the list of ligands of galectin-3. BioMed Central - Cell Biology 2: 17.
Gonen T., Donaldson PJ. and
Kistler J. (2000) Galectin-3 – a new adhesion molecule in the lens.
Investigative Ophthalmology and Visual Science 41: 199-203. See also
Front Cover.