This domain lies just downstream from Chorein_N (Pfam:PF12624) [1,2] and is involved in lipid binding and transport [1,2,6]. It has been described as extended-chorein in [7]. VPS13 proteins are involved in vesicle fusion, autophagy, and actin regulation. They bind phospholipids and act as channels that mediate the transfer of lipids between membranes at organelle contact sites [3-5]. Members of this entry have the capacity to bind and transfer tens of glycerolipids at once. They act in multiple cellular sites, namely the interface between the vacuole and mitochondria, on endosomes or on the nuclear-vacuole junction in the case of yeast. Mammalian VPS13 localizes at contacts between the ER and other organelles (VPS13A and VPS13D bridge the ER to mitochondria; VPS13C bridges the ER to late endosomes and lysosomes and VPS13B may localise to endosome-endosome contacts) [4-6]. Mutations in this proteins cause diverse diseases such as Chorea-acanthocytosis, Cohen syndrome, Parkinson's disease, and spastic ataxia. They belong to the RBG (repeating beta-grooves) superfamily [7], whose structures consist of long hydrophobic grooves built from multiple repeating modules of five beta-sheets followed by a loop [6,7].

1: Analysis of the human VPS13 gene family. Velayos-Baeza A, Vettori A, Copley RR, Dobson-Stone C, Monaco AP; Genomics. 2004;84:536-549. PMID:15498460

2: Vacuolar protein sorting protein 13A, TtVPS13A, localizes to the tetrahymena thermophila phagosome membrane and is required for efficient phagocytosis. Samaranayake HS, Cowan AE, Klobutcher LA; Eukaryot Cell. 2011;10:1207-1218. PMID:21764909

3: Insights into VPS13 properties and function reveal a new mechanism of eukaryotic lipid transport. Leonzino M, Reinisch KM, De Camilli P; Biochim Biophys Acta Mol Cell Biol Lipids. 2021;1866:159003. PMID:34216812

4: VPS13A is closely associated with mitochondria and is required for efficient lysosomal degradation. Munoz-Braceras S, Tornero-Ecija AR, Vincent O, Escalante R; Dis Model Mech. 2019; [Epub ahead of print] PMID:30709847

5: Competitive organelle-specific adaptors recruit Vps13 to membrane contact sites. Bean BDM, Dziurdzik SK, Kolehmainen KL, Fowler CMS, Kwong WK, Grad LI, Davey M, Schluter C, Conibear E; J Cell Biol. 2018;217:3593-3607. PMID:30018089

6: VPS13A and VPS13C are lipid transport proteins differentially localized at ER contact sites. Kumar N, Leonzino M, Hancock-Cerutti W, Horenkamp FA, Li P, Lees JA, Wheeler H, Reinisch KM, De Camilli P; J Cell Biol. 2018;217:3625-3639. PMID:30093493

7: Structural and biochemical insights into lipid transport by VPS13 proteins. Adlakha J, Hong Z, Li P, Reinisch KM; J Cell Biol. 2022; [Epub ahead of print] PMID:35357422

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