This entry represents ubinuclein-2 (UBN2). It contains a conserved HIRA-binding domain, which directly interacts with the N-terminal WD repeats of HIRA []. UBN2 and UBN1 are believed to be the orthologs of Hpc2p, a subunit of the HIR complex (a nucleosome assembly complex involved in regulation of histone gene transcription) in budding yeast []. It is phosphorylated upon DNA damage, probably by ATM or ATR [].
