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2016 Scientific Report

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CENTER FOR<br />

CANCER AND CELL BIOLOGY<br />

Bart O. Williams, Ph.D.<br />

Director<br />

The Center’s scientists study the basic<br />

mechanisms and molecular biology of cancer and<br />

other diseases, with the goal of developing better<br />

diagnostics and therapies.<br />

A depiction of arrestin binding by a phosphorylated and active rhodopsin.<br />

The cell membrane lipids are shown as off-white, rhodopsin is blue, arrestin is red, and<br />

phosphorus molecules are orange. The phosphorylated C-terminal tail of rhodopsin<br />

binds to the N-domain (left) of the arrestin molecule. In the main contact region between<br />

the two molecules (central), arrestin accommodates the ICL2 helix of rhodopsin. In this<br />

fully activated state, the tip of arrestin’s C-domain contacts the membrane (right).<br />

(Model by Parker de Waal of the Xu lab)<br />

5

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