This is the C-terminal domain of Ubiquitin-like protein 4A (Ubl4A), an orthologue of yeast Get5. In budding yeast, GET proteins directly mediate the insertion of newly synthesized TA proteins into endoplasmic reticulum membranes. Similarly, mammalian ...
This is the C-terminal domain of Ubiquitin-like protein 4A (Ubl4A), an orthologue of yeast Get5. In budding yeast, GET proteins directly mediate the insertion of newly synthesized TA proteins into endoplasmic reticulum membranes. Similarly, mammalian BAG6, Ubl4a, and SGTA make up a trimeric complex that binds TA proteins post-translationally and then loads them onto the cytosolic ATPase TRC40, which in turn targets them to the endoplasmic reticulum. Structural studies show that this C-terminal TUGS domain of Ubl4a is essential for BAG6 tethering. Given that BAG6 mediates oligomeric complex formation of Ubl4a, TRC35, and TRC40 (mammalian counterparts of Get5, Get4, and Get3, respectively), the C-terminal TUGS domain might be crucial for supporting BAG6-mediated Ubl4a-TRC35 complex formation in humans as an alternative to the direct Get5-Get4 interaction in yeast [1,2].
Bag6 (BCL2-associated athanogene cochaperone 6) is part of a cytosolic protein quality control complex involved in the post- translational delivery of tail-anchored/type II transmembrane proteins to the endoplasmic reticulum membrane, in the mislocal ...
Bag6 (BCL2-associated athanogene cochaperone 6) is part of a cytosolic protein quality control complex involved in the post- translational delivery of tail-anchored/type II transmembrane proteins to the endoplasmic reticulum membrane, in the mislocalised protein degradation pathway and in the endoplasmic reticulum- associated degradation. The BAG-similar domain, found at the C- terminal end of this protein plays a role in the interaction with the other members of the complex, Ubl4A and TRC35. This domain shows three helices in an extended conformation that differ from the three-helix bundle fold of the canonical BAG domain (Pfam:PF02179) [1,2].
