This repeat is a family of repeating regions of eukaryotic vacuolar sorting-associated 13 proteins. This repeating region shares a common core element that includes a well-conserved P-x4-P-x13-17-G sequence. This region contains a FFAT motif which mediates VAMP binding and tethering of the ER [1,2]. VPS13 proteins have been implicated in processes including 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 [3,4,5]. Members of this entry belong to the RBG (repeating beta-groove) superfamily. They have a long hydrophobic grooves made of multiple repeating modules that consist of five beta-sheets followed by a loop [6].

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: The GTPase Arf1 Is a Determinant of Yeast Vps13 Localization to the Golgi Apparatus. Kolakowski D, Rzepnikowska W, Kaniak-Golik A, Zoladek T, Kaminska J; Int J Mol Sci. 2021; [Epub ahead of print] PMID:34830155

4: Human VPS13A is associated with multiple organelles and influences mitochondrial morphology and lipid droplet motility. Yeshaw WM, van der Zwaag M, Pinto F, Lahaye LL, Faber AI, Gomez-Sanchez R, Dolga AM, Poland C, Monaco AP, van IJzendoorn SC, Grzeschik NA, Velayos-Baeza A, Sibon OC; Elife. 2019; [Epub ahead of print] PMID:30741634

5: 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

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