This entry includes Hobbit protein from Drosophila melanogaster and its homologues such as Bridge-like lipid transfer protein family 2 member ((BLTP2/KIAA0100) from human and FMP27 from yeast, referred to as Hob proteins [1-3]. They are localised to endoplasmic reticulum-plasma membrane (ER-PM) contact sites described as conserved lipid-binding proteins. They have a long hydrophobic groove and can mediate bulk transport of lipid between organelles. This entry also includes maize protein APT1 and Arabidopsis homologues SABRE and KIP [2]. Members of this entry belong to the RBG superfamily which all share the same structure consisting of multiple repeating modules consisting of five beta-sheets followed by a loop. This entry represents a RBG module with a conserved GFWDK sequence motif.

1: Gene loops juxtapose promoters and terminators in yeast. O'Sullivan JM, Tan-Wong SM, Morillon A, Lee B, Coles J, Mellor J, Proudfoot NJ; Nat Genet. 2004;36:1014-1018. PMID:15314641

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

3: 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

4: The Hob proteins are novel and conserved lipid-binding proteins at ER-PM contact sites. Neuman SD, Jorgensen JR, Cavanagh AT, Smyth JT, Selegue JE, Emr SD, Bashirullah A; J Cell Sci. 2022; [Epub ahead of print] PMID:34415038