Fanconi anemia group I protein (FANCI)

Plays an essential role in the repair of DNA double- strand breaks by homologous recombination and in the repair of interstrand DNA cross-links (ICLs) by encouraging FANCD2 monoubiquitination by FANCL and engaging in recruitment to DNA repair sites. Required for maintenance of chromosomal stability.

Specifically binds branched DNA: binds both single- stranded DNA (ssDNA) and double-stranded DNA (dsDNA). Participates in S phase and G2 phase checkpoint activation upon DNA damage.