鸟嘌呤脱氨酶（英语：Guanine deaminase，又称为鸟嘌呤氨基水解酶，简称为鸟嘌呤酶）是一种催化鸟嘌呤转变为黄嘌呤的酶

鸟嘌呤

黄嘌呤。注意：氮原子被氧原子替代。

EC 1.1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22  · 2.1/2/3/4/5/6/7(2.7.10/11-12)/8/9  · 3.1/2/3/4(3.4.21/22/23/24)/5/6/7/8/9/10/11/12/13  ·

IMP->AMP： 腺嘌呤琥珀酸合酶 · 腺苷酸琥珀酸裂解酶 · reverse (AMP deaminase)

Guanine deaminase also known as cypin, guanase, guanine aminase, GAH, and guanine aminohydrolase is an aminohydrolase enzyme which converts guanine to xanthine. Cypin is a major cytosolic protein that interacts with PSD-95. It promotes localized microtubule assembly in neuronal dendrites.