UV radiation resistance protein/autophagy-related protein 14 (IPR018791)

Short name: UV_resistance/autophagy_Atg14

Overlapping homologous superfamilies


Family relationships


This entry includes Atg14 (autophagy-related protein 14) from budding yeasts, Vps38 from fission yeasts and their homologues, Atg14L/Bakor (beclin-1-associated autophagy-related key regulator) and UVRAG (UV irradiation resistance-associated gene), from animals.

Atg14 is a hydrophilic protein with a coiled-coil motif at the N terminus region. Yeast cells with mutant Atg14 are defective not only in autophagy but also in sorting of carboxypeptidase Y (CPY), a vacuolar-soluble hydrolase, to the vacuole [PMID: 9712845].

Barkor positively regulates autophagy through its interaction with Beclin-1, with decreased levels of autophagosome formation observed when Barkor expression is eliminated [PMID: 19050071]. UVRAG is also a Beclin 1 binding protein that positively stimulate starvation-induced autophagy [PMID: 16799551]. Autophagy mediates the cellular response to nutrient deprivation, protein aggregation, and pathogen invasion in humans, and malfunction of autophagy has been implicated in multiple human diseases including cancer.

Class III phosphatidylinositol 3-kinase (PI3-kinase) regulates multiple membrane trafficking. In yeast, two distinct PI3-kinase complexes are known: complex I (Vps34, Vps15, Vps30/Atg6, and Atg14) is involved in autophagy, and complex II (Vps34, Vps15, Vps30/Atg6, and Vps38) functions in the vacuolar protein sorting pathway [PMID: 11157979]. In mammals, complex II is also involved in autophagy [PMID: 20643123]. The mammalian counterparts of Vps34, Vps15, and Vps30/Atg6 are Vps34, p150, and Beclin 1, respectively, and UV irradiation resistance-associated gene (UVRAG) has been identified as identical to yeast Vps38 [PMID: 18843052].

Contributing signatures

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