Arv1 protein (IPR007290)

Short name: Arv1

Overlapping homologous superfamilies


Family relationships



Arv1 is a transmembrane protein, with potential zinc-binding motifs, that mediates sterol homeostasis. Its action is important in lipid homeostasis, which prevents free sterol toxicity [PMID: 11063737]. Arv1 contains a homology domain (AHD), which consists of an N-terminal cysteine-rich subdomain with a putative zinc-binding motif, followed by a C-terminal subdomain of 33 amino acids. The C-terminal subdomain of the AHD is critical for the protein's function [PMID: 16725371]. In yeast, Arv1p is important for the delivery of an early glycosylphosphatidylinositol GPI intermediate, GlcN-acylPI, to the first mannosyltransferase of GPI synthesis in the ER lumen [PMID: 18287539]. It is important for the traffic of sterol in yeast and in humans. In eukaryotic cells, it may fuction in the sphingolipid metabolic pathway as a transporter of ceramides between the ER and Golgi [PMID: 12145310].

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.