Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells. Actin assembles into short polymer microfilaments, these are thought to contribute to parasite gliding motility. Polymerization of actin is slow and requires the presence of gelsolin and phalloidin (in vitro). Interacts with DNase I with low affinity (in vitro). Belongs to the actin family.