Protein with structural similarity to lipid transport protein Vps13p; localizes to multiple membrane contact sites between organelles including those between the mitochondria–ER, and the ER-plasma membrane but does not function as an ER–PM tether; localization to the ER requires an N-terminal membrane anchor; non-tagged protein is detected in highly purified mitochondria in high-throughput studies; ortholog of D. melanogaster Hobbit protein