Ubiquitin-associated domain-containing protein 2 (UBAC2)

Ubiquitin-associated domain-containing protein 2 (UBAC2) is an evolutionarily conserved, endoplasmic reticulum (ER)-resident protein characterized by the presence of a ubiquitin-associated (UBA) domain at its C-terminus[1][3][5]. The UBA domain mediates interactions with ubiquitin, implicating UBAC2 in processes coupled to the ubiquitin-proteasome system, such as protein degradation and intracellular protein quality control[2]. In mammalian and plant systems, UBAC2 participates in ER-associated protein degradation (ERAD), modulating the accumulation and stability of specific membrane proteins[1]. In Arabidopsis, UBAC2 regulates copper uptake by stabilizing plasma membrane copper transporters (COPT family), and also participates in pathogen defense by modulating autophagic turnover of ER components and influencing callose deposition at pathogen attack sites[1]. In humans, UBAC2 is involved in negative regulation of canonical Wnt signaling and ER-to-cytosol retrograde protein transport[5]. Despite its defined molecular functions, UBAC2 is not currently considered a therapeutic target, and no drugs are known to interact with it. There are no established biomarkers or specific safety concerns related to UBAC2 modulation. UBAC2 is also referenced as PHGDHL1, among other aliases, and should not be confused with enzymes or membrane receptors. It is classed within a protein family defined by the UBA domain, which is broadly involved in ubiquitin-dependent cellular processes[2].

Other names

PHGDHL1PSEC0110FLJ30548RP11-178C10.1phosphoglycerate dehydrogenase-like protein 1