MUTYH（mutY DNA glycosylase），癌症关联基因，基因ID：4595，该基因编码一种参与dna氧化损伤修复的dna糖苷酶。这种酶在腺嘌呤与鸟嘌呤、胞嘧啶或8-氧-7，8-二氢鸟嘌呤（一种主要的氧化损伤的DNA损伤）不适当配对的部位从DNA主干上切除腺嘌呤碱。蛋白质定位于细胞核和线粒体。这种基因产物被认为通过在氧化损伤后引入单链断裂而在细胞凋亡信号中发挥作用。该基因突变导致结直肠癌的遗传易感性，称为mutyh相关息肉病（map）。已发现该基因编码不同亚型的多个转录变体。[由RefSeq提供，2017年4月]This gene encodes a DNA glycosylase involved in oxidative DNA damage repair. The enzyme excises adenine bases from the DNA backbone at sites where adenine is inappropriately paired with guanine， cytosine， or 8-oxo-7，8-dihydroguanine， a major oxidatively damaged DNA lesion. The protein is localized to the nucleus and mitochondria. This gene product is thought to play a role in signaling apoptosis by the introduction of single-strand breaks following oxidative damage. Mutations in this gene result in heritable predisposition to colorectal cancer， termed MUTYH-associated polyposis (MAP). Multiple transcript variants encoding different isoforms have been found for this gene. [pro。