This entry represents the N-terminus of a group of very long eukaryotic proteins, including the human BLTP1 (also known as KIAA1109) protein and its yeast orthologue Csf1. These are tube-forming lipid transport proteins that belong to the RBG (repeating beta-groove) superfamily. They consist of long hydrophobic grooves made of multiple repeating modules of five beta-sheets followed by a loop.

1: A novel superfamily of bridge-like lipid transfer proteins. Neuman SD, Levine TP, Bashirullah A; Trends Cell Biol. 2022;32:962-974. PMID:35491307

2: Vps13-like proteins provide phosphatidylethanolamine for GPI anchor synthesis in the ER. Toulmay A, Whittle FB, Yang J, Bai X, Diarra J, Banerjee S, Levine TP, Golden A, Prinz WA; J Cell Biol. 2022; [Epub ahead of print] PMID:35015055