雄激素受体
雄激素不敏感综合征
错义突变
完全雄激素不敏感综合征
雄激素
突变
突变体
内分泌学
生物
内科学
基因
化学
遗传学
激素
医学
前列腺癌
癌症
作者
Dan Zhou,Hui Xu,Xianfeng Shen,Rong Gu,Ying Chen,Guowu Chen,Pan Li,Huijuan Shi,Xiao Sun,Aijie Xin
标识
DOI:10.1016/j.cca.2022.03.021
摘要
Androgen insensitivity syndrome (AIS) is an X-linked recessive genetic disease characterized by disorders of sex development, commonly caused by mutations of the androgen receptor (AR) gene. Herein, we identified a novel hemizygous mutation (c.2118T > A, p. Asn706Lys) of AR resulting in complete androgen insensitivity syndrome (CAIS) in twins. This missense mutation contributed to significantly decreased mRNA transcription and protein expression. In addition, structure model analysis showed that Asn706Lys resulted in loss of hydrogen bond with Asp891 and reduced protein stability. Furthermore, the mutant AR failed to bind to ligand due to the loss of hydrogen bond with dihydrotestosterone (DHT). This disrupted the translocation of AR protein from cytoplasm to nucleus after hormone stimulation. Our findings firstly demonstrated the novel mutation of c.2118T > A in AR directly caused CAIS. This contributed to expanding the AR mutational spectrum and revealed the pathogenic mechanism of AIS, as well as facilitating precise diagnosis and genetic counseling.
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