XRCC1（X-ray repair cross complementing 1），癌症关联基因，基因ID：7515，该基因编码的蛋白质参与了电离辐射和烷化剂对DNA单链断裂的有效修复。该蛋白与DNA连接酶III、聚合酶β和聚ADP核糖聚合酶相互作用，参与碱基切除修复途径。在生殖细胞减数分裂和重组过程中可能在DNA加工中起作用。该基因罕见的微卫星多态性与不同放射敏感性患者的癌症有关。The protein encoded by this gene is involved in the efficient repair of DNA single-strand breaks formed by exposure to ionizing radiation and alkylating agents. This protein interacts with DNA ligase III， polymerase beta and poly (ADP-ribose) polymerase to participate in the base excision repair pathway. It may play a role in DNA processing during meiogenesis and recombination in germ cells. A rare microsatellite polymorphism in this gene is associated with cancer in patients of varying radiosensitivity.关联癌症：宫颈癌，非小细胞肺癌。