Plays a role in DNA damage repair as component of the ASCC complex. Recruits ASCC3 and ALKBH3 to sites of DNA damage by binding to polyubiquitinated proteins that have 'Lys-63'-linked polyubiquitin chains . Part of the ASC-1 complex that enhances NF-kappa-B, SRF and AP1 transactivation . Involved in activation of the ribosome quality control (RQC) pathway, a pathway that degrades nascent peptide chains during problematic translation . As part of the ribosome quality control trigger (RQT) complex, recognizes ZNF598-dependent ubiquitination of stalled ribosomes (By similarity).
Nucleus . Nucleus speckle . Colocalizes with the spliceosomal components PRPF8 and SNRNP200/BRR2 in nuclear foci when cells have been exposed to alkylating agents that cause DNA damage. Colocalizes with RNF113A and 'Lys-63'-linked polyubiquitinated proteins, ALKBH3 and ASCC3 in nuclear foci when cells have been exposed to alkylating agents that cause DNA damage. .
Ubiquitous.
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