The function of MOSPD2 (motile sperm domain containing 2, Ensembl gene identifier ENSG00000130150) is as follows. Endoplasmic reticulum-anchored protein that mediates the formation of contact sites between the endoplasmic (ER) and endosomes, mitochondria or Golgi through interaction with conventional- and phosphorylated-FFAT-containing organelle-bound proteins (PubMed:29858488, PubMed:33124732, PubMed:35389430). In addition, forms endoplasmic reticulum (ER)-lipid droplets (LDs) contacts through a direct protein-membrane interaction and participates in LDs homeostasis (PubMed:35389430). The attachment mechanism involves an amphipathic helix that has an affinity for lipid packing defects present at the surface of LDs (PubMed:35389430). Promotes migration of primary monocytes and neutrophils, in response to various chemokines (PubMed:28137892). {ECO:0000269|PubMed:28137892, ECO:0000269|PubMed:29858488, ECO:0000269|PubMed:33124732, ECO:0000269|PubMed:35389430}.