E3 ubiquitin-protein ligase TRAIP (TRAIP)

E3 ubiquitin-protein ligase TRAIP (TRAIP) is a protein-coding gene product characterized by an N-terminal RING finger domain, coiled-coil regions, and a leucine zipper. TRAIP is an E3 ubiquitin ligase that undergoes auto-ubiquitination and regulates protein degradation via the ubiquitin-proteasome system. It was originally identified as an interactor of tumor necrosis factor receptor-associated factors (TRAFs), especially TRAF1 and TRAF2, and has been described to negatively regulate TRAF2-mediated NF-κB signaling, influencing cell activation and apoptosis. TRAIP is predominantly localized to the nucleolus in interphase cells and is tightly regulated during the cell cycle, with highest expression in G2/M. It plays a critical role in mitosis, particularly as a regulator of the spindle assembly checkpoint and in the DNA damage response by facilitating the recruitment of DNA repair machinery (RAP80, BRCA1) to sites of damage. TRAIP is essential for cell proliferation and normal embryonic development, as knockout models result in embryonic lethality due to apoptosis and reduced cell division. Overexpression of TRAIP is reported in certain cancers, suggesting relevance in tumorigenesis.

Other names

TRAF-interacting proteinRNF206TRIPSCKL9ring finger protein 206RING-type E3 ubiquitin transferase TRAIPTRAIPIP

Not applicable (no drugs identified). For hypothetical drug action: inhibition of TRAIP could impact cell cycle progression, DNA repair, and apoptosis signaling based on its biological functions.