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LSA Biophysics pres.

Seminar Title: Emergent properties of membrane proximal signaling events

Scott Hansen, Assistant Professor of Biochemistry, Molecular, Biology & Biophysics, University of Oregon

Scott Hanson Scott Hanson
Scott Hanson
Abstract: In eukaryotes, cell polarity emerges from the complex interplay between plasma membrane and cytoplasmic molecules, most notably phosphatidylinositol phosphate (PIP) lipids, lipid modifying enzymes, small GTPases, and the actin cytoskeleton. In many cases, competition between lipid kinases and phosphatases underlies the production of PIP lipids that become asymmetrically distributed across the plasma membrane. Although many of the enzymes that regulate PIP lipid synthesis in vivo have been identified, questions concerning how PIP lipid phosphorylation reactions are rapidly turned ON and OFF remain unanswered. The Hansen lab has taken a reductionist approach to biochemically reconstitute minimal sets of signaling molecules that control PIP lipid phosphorylation at the plasma membrane. The knowledge gained from our biochemical analysis has provided new insights concerning how lipid modifying enzymes regulate the formation of transient, polarized, and oscillatory PIP lipid signaling reactions in living cells.
Scott Hanson Scott Hanson
Scott Hanson
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