OxTalks will soon move to the new Halo platform and will become 'Oxford Events.' There will be a need for an OxTalks freeze. This was previously planned for Friday 14th November – a new date will be shared as soon as it is available (full details will be available on the Staff Gateway).
In the meantime, the OxTalks site will remain active and events will continue to be published.
If staff have any questions about the Oxford Events launch, please contact halo@digital.ox.ac.uk
Image correlation methods provide a new window of analysis for measurement of protein-protein interactions and macromolecular transport properties from fluorescence images of living cells. These approaches are based on space and time correlation analysis of fluctuations in fluorescence intensity within images recorded as a time series on a laser scanning or TIRF microscope. We previously introduced spatio-temporal image correlation spectroscopy (STICS) which measures vectors of protein flux in cells based on the calculation of a spatial correlation function as a function of time from an image time series. Here we will describe the application of time window STICS and its two color extension, spatio-temporal image cross-correlation spectroscopy (STICCS), for measuring transport waves of adhesion related macromolecules talin and vinculin as well as cytoskeletal actin between assembling and disassembling podosomes in dendritic immune cells. Podosomes are cylindrical membrane complexes with an integrin adhesive ring and an actin rich core that are associated with cellular migration and invasion in specific cell types. Finally, if there is time, we will also highlight recent advances we have made with a new form of reciprocal (k-) space ICS, (kICS) that allows us to measure unbiased transport coefficients of fluorescently labeled membrane proteins even if there is complex photophysics (such as emission blinking) of the probe. We will describe an application of kICS to map membrane transport and confinement in lipid domains of the