title: Novel mutation in the ligand-binding domain of the androgen receptor gene (l790p) associated with complete androgen insensitivity syndrome.
abstract: Mutations in the X-linked androgen receptor (AR) gene cause androgen insensitivity syndrome (AIS), resulting in an impaired embryonic sex differentiation in 46,XY genetic men. Complete androgen insensitivity (CAIS) produces a female external phenotype, whereas cases with partial androgen insensitivity (PAIS) have various ambiguities of the genitalia. Mild androgen insensitivity (MAIS) is characterized by undermasculinization and gynecomastia. Here we describe a 2-month-old 46,XY female patient, with all of the characteristics of CAIS. Defects in testosterone (T) and dihydrotestosterone (DHT) synthesis were excluded. Sequencing of the AR gene showed the presence in exon 6 of a T to C transition in the second base of codon 790, nucleotide position 2369, causing a novel missense Leu790Pro mutation in the ligand-binding domain of the AR protein. The identification of a novel AR mutation in a girl with CAIS provides significant information due to the importance of missense mutations in the ligand-binding domain of the AR, which are able to induce functional abnormalities in the androgen binding capability, stabilization of active conformation, or interaction with coactivators.
authors: Department of Clinical Sciences and Imaging, G d'Annunzio University Foundation, Chieti-Pescara, Italy.
authors: Florina
authors: F
authors: Raicu
authors: Rossella
authors: R
authors: Giuliani
authors: Valentina
authors: V
authors: Gatta
authors: Chiara
authors: C
authors: Palka
authors: Paolo Guanciali
authors: PG
authors: Franchi
authors: Pierluigi
authors: P
authors: Lelli-Chiesa
authors: Stefano
authors: S
authors: Tumini
authors: Liborio
authors: L
authors: Stuppia
mesh_terms: D013734:Androgen-Insensitivity Syndrome / Q000175:diagnosis / Q000235:genetics*; D004247:DNA / Q000235:genetics; D005091:Exons / Q000235:genetics; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D020125:Mutation, Missense / Q000235:genetics*; D011944:Receptors, Androgen / Q000235:genetics*
chemical_list: D011944:Receptors, Androgen; D004247:DNA