TY - JOUR T1 - An exonic point mutation of the androgen receptor gene in a family with complete androgen insensitivity A1 - Sai, Tetsujun LA - English YR - 1990 UL - http://buscaintegrada.pucsp.br/vufind/Record/pubmed-1683844 AB - We have discovered in the X-linked androgen receptor gene a single exonic nucleotide substitution that causes complete androgen insensitivity (resistance) in a sibship with three affected individuals. The mutation, a guanine-to-adenine transition, occurs at nucleotide number 2682 and changes the sense of codon 717 from tryptophan to a translation stop signal. Codon 717 is in exon 4, so the mutation predicts the synthesis of a truncated receptor that lacks most of its androgen-binding domain. The substitution abolishes a recognition sequence for the restriction endonuclease HaeIII. Amplification of exon 4 by the polymerase chain reaction followed by double digestion with HinfI and HaeIII permits facile recognition of hemizygotes and heterozygous carriers of the mutation. KW - Original Articles ER -