Bridge-like lipid transfer protein family member 1 C-terminal domain-containing protein, Lpd-1 or LPD3, of 4018 aas and at least one N-terminal TMS, but several additional potential TMSs. It is a tube-forming lipid transport protein which provides phosphatidylethanolamine for glycosylphosphatidylinositol (GPI) anchor synthesis in the endoplasmic reticulum. It also plays a role in endosomal trafficking and endosome recycling, and is involved in the actin cytoskeleton and cilia structural dynamics (Kane et al. 2019). It acts as a regulator of phagocytosis (Jeng et al. 2019).  The structural basis of bulk lipid transfer by bridge-like lipid transfer protein LPD-3 in C. elegans has been solved (Kang et al. 2024).