FAN1（FANCD2 and FANCI associated nuclease 1），癌症关联基因，基因ID：22909，该基因在DNA的跨链修复中起作用，编码一个具有5'皮瓣核酸内切酶和5'-3'外切酶活性的蛋白质此基因突变可引起核型巨核间质性肾炎。另外，还描述了编码不同亚型的剪接转录变体。[由RefSeq提供，2016年2月]This gene plays a role in DNA interstrand cross-link repair and encodes a protein with 5' flap endonuclease and 5'-3' exonuclease activity. Mutations in this gene cause karyomegalic interstitial nephritis. Alternatively spliced transcript variants encoding distinct isoforms have been described. [provided by RefSeq， Feb 2016]。