Dynamin is a large GTPase implicated in controlling the initial stages
of endocytosis. Its mechanism of action remains uncertain, but it is
expected to interact cyclically with components of the endocytic machi
nery. Dynamin binds to a number of different macromolecules, including
microtubles, SH3-domain-containing proteins, and acidic phospholipids
. We interpret these findings in terms of a cooperative interaction be
tween dynamin and components of coated and non-coated pits.