A novel c.C2754 > T transition in the androgen receptor gene introduces the premature termination codon Q798X and results in a truncated form of the receptor

Gynecol Endocrinol. 2004 Oct;19(4):178-81. doi: 10.1080/09513590400012127.


A genetic analysis of a female with a 46,XY genotype and typical symptoms of the complete androgen insensitivity syndrome (CAIS) was conducted. The patient was diagnosed with an abdominal tumor due to the presence of a Sertoli cell adenoma in both gonads. Multiple temperature single-stranded conformational polymorphism (MSSCP) and sequence analyses of the androgen receptor gene revealed a c.C2754 > T mutation in exon 6. This mutation, which has not been previously reported, alters a Gln codon to a termination codon (Q798X). This results in the interruption of the amino acid sequence of the androgen receptor within the ligand-binding domain between helices VII and VIII. The truncated form of the receptor is devoid of 123 amino acids at the carboxyl end, a major part of the ligand-binding domain, and the AT2 sequence responsible for the activation of the transcription. It was concluded that the novel c.C2754 > T transition rendered the androgen receptor incapable of both ligand binding and activating the transcription, and was the cause of CAIS in the patient.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenoma / genetics
  • Adult
  • Base Sequence
  • Codon, Nonsense / genetics*
  • Female
  • Humans
  • Ovarian Neoplasms / genetics
  • Polymorphism, Single-Stranded Conformational
  • Receptors, Androgen / chemistry
  • Receptors, Androgen / genetics*
  • Receptors, Androgen / physiology
  • Sertoli Cell Tumor / genetics


  • Codon, Nonsense
  • Receptors, Androgen