Protein with structural similarity to lipid transport protein Vps13p; localizes to mitochondria–ER and also to ER-plasma membrane contact sites but does not function as an ER–PM tether; localization to ER-PM contact sites requires an N-terminal membrane anchor and the targeting adapter Hoi1p; shares a role with Hoi1p in ergosterol homeostasis; detected in highly purified mitochondria in high-throughput studies; ortholog of D. melanogaster Hobbit and human BLTP2