Ysc84 is a family of Las17-binding proteins found in metazoa. Together, Las17 and Ysc84 are essential for proper polymerisation of actin; Ysc84 is able to bind to and stabilise the actin dimer presented by Las17 and thereby promote polymerisation. An active actin cytoskeleton is necessary for adequate endocytosis. (Pfam:PF00018), or a FYVE zinc finger (Pfam:PF01363).

1: The WASP homologue Las17 activates the novel actin-regulatory activity of Ysc84 to promote endocytosis in yeast. Robertson AS, Allwood EG, Smith AP, Gardiner FC, Costa R, Winder SJ, Ayscough KR; Mol Biol Cell. 2009;20:1618-1628. PMID:19158382