This entry represents the VPS13 adaptor binding (VAB) domain, previously known as SHR-BD, found in vacuolar protein sorting-associated protein 13 (VPS13) [1]. Proteins containing this domain are involved in vesicle fusion, autophagy, and actin regulation [1] and, through membrane-specific adaptor proteins such as Ypt35, Spo71 and the mitochondrial membrane protein Mcp1, VPS13 proteins are recruited to different membranes. This domain interacts with Ypt35 which recruits VPS13 to endosomal and vacuolar membranes, and with Mcp1 to target VPS13 at mitochondria. Defects in the human protein VPS13A cause chorea-acanthocytosis, an autosomal recessive neurodegenerative disorder [1,2]. In plants, this domain is found to be the region which interacts with SHR or the SHORT-ROOT transcription factor, a regulator of root-growth and asymmetric cell division that separates ground tissue into endodermis and cortex. The plant protein containing the SHR-BD is named SHRUBBY or SHBY UniProt:Q9FT44 [3].

1: 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

2: A conserved sorting-associated protein is mutant in chorea-acanthocytosis. Rampoldi L, Dobson-Stone C, Rubio JP, Danek A, Chalmers RM, Wood NW, Verellen C, Ferrer X, Malandrini A, Fabrizi GM, Brown R, Vance J, Pericak-Vance M, Rudolf G, Carre S, Alonso E, Manfredi M, Nemeth AH, Monaco AP; Nat Genet. 2001;28:119-120. PMID:11381253

3: Identification of SHRUBBY, a SHORT-ROOT and SCARECROW interacting protein that controls root growth and radial patterning. Koizumi K, Gallagher KL; Development. 2013;140:1292-1300. PMID:23444357