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]. Arabidopsis thaliana has been shown to encode 2 ARV proteins (ARV1 and ARV2) both of which contain the AHD domain. This family also includes ARV2 from A. thaliana [PMID: 16725371].

GO terms

Biological Process

GO:0032366 intracellular sterol transport

Molecular Function

No terms assigned in this category.

Cellular Component

No terms assigned in this category.

Contributing signatures

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