該基因編碼的蛋白是一種參與嘌呤代謝的P1-P3-雙（5'-腺苷）三磷酸水解酶這個基因包含了3號染色體上常見的脆性位點fra3b，致癌物引起的損傷可導致易位和異常轉錄。事實上，在大約一半的食管癌、胃癌和結腸癌中發現了這種基因的異常轉錄物。編碼的蛋白質也是一種腫瘤抑制因子，因為其活性的喪失會導致復制應激和DNA損傷[由RefSeq提供，2017年8月]
The protein encoded by this gene is a P1-P3-bis(5'-adenosyl) triphosphate hydrolase involved in purine metabolism. This gene encompasses the common fragile site FRA3B on chromosome 3, where carcinogen-induced damage can lead to translocations and aberrant transcripts. In fact, aberrant transcripts from this gene have been found in about half of all esophageal, stomach, and colon carcinomas. The encoded protein is also a tumor suppressor, as loss of its activity results in replication stress and DNA damage. [provided by RefSeq, Aug 2017]