{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nTRIP12 is an HECT‐domain ubiquitin E3 ligase that plays a critical role in maintaining genome integrity. It fine‐tunes the DNA damage response by limiting the accumulation of key factors at double‐strand breaks – for instance, curbing RNF168 levels to confine histone ubiquitylation at sites of DNA lesion, and by binding to PARP1 to catalyze its polyubiquitylation, thereby preventing excessive PARP1 trapping upon treatment with PARP inhibitors. In addition, TRIP12 is regulated downstream of p16 in HPV‐positive head and neck cancers, and it modulates ubiquitin‐dependent stabilization of key checkpoint proteins such as USP7, ultimately influencing the p53 pathway and even engaging with phosphorylated Ku70 after DNA damage."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "5"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn addition to its role in signaling DNA repair, TRIP12 is a central mediator of protein quality control through the ubiquitin–proteasome system. It functions as the dedicated E3 enzyme for the human ubiquitin fusion degradation (UFD) pathway, promoting the ubiquitylation and degradation of both artificial and physiological UFD substrates. By assembling specific ubiquitin chain architectures – including branched K29/K48‐linked chains that accelerate PROTAC‐induced degradation – TRIP12 ensures timely removal of aberrant or supernumerary proteins. TRIP12 also regulates critical determinants of cellular homeostasis by targeting uncomplexed subunits in chromatin remodeling complexes (such as BAF57) and by controlling the stability of transcription factors like PTF1a, as well as modulating FBW7 protein levels. Furthermore, alternative splicing events in TRIP12 have been linked to treatment responses in acute myeloid leukemia."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "6", "end_ref": "11"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nTRIP12’s biological significance is further underscored by its involvement in developmental processes and its dysregulation in disease. Germline mutations and haploinsufficiency of TRIP12 have been associated with neurodevelopmental disorders featuring intellectual disability, autism spectrum traits, and craniofacial dysmorphism, as exemplified by Clark–Baraitser syndrome. In the oncologic context, TRIP12 can act as either a tumor suppressor or an oncogenic facilitator: it has been shown to inhibit epithelial–mesenchymal transition in breast cancer by repressing ZEB1/2 expression, while its overexpression in pancreatic cells promotes acinar-to-ductal metaplasia and metastatic progression. Emerging data also hint at intersections with major oncoprotein networks, including potential connections with MYC‐driven pathways."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "12", "end_ref": "19"}]}, {"type": "t", "text": ""}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Thorkell Gudjonsson, Matthias Altmeyer, Velibor Savic, et al. 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