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Related Experiment Videos

Androgen receptor mutants that affect normal growth and development.

A O Brinkmann1, J Trapman

  • 1Department of Endocrinology & Reproduction, Erasmus University Rotterdam, The Netherlands.

Cancer Surveys
|January 1, 1992
PubMed
Summary

Understanding the human androgen receptor

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Area of Science:

  • Molecular biology
  • Endocrinology
  • Genetics

Background:

  • The human androgen receptor (AR) is crucial for male sexual development and function.
  • Androgen insensitivity syndrome (AIS) results from defects in the AR.
  • Understanding AR structure aids in studying AIS molecular mechanisms.

Purpose of the Study:

  • To review the functional domain structure of the wild-type human AR.
  • To examine the molecular structure of AR in complete androgen insensitivity.
  • To correlate AR mutations with disease phenotypes.

Main Methods:

  • Functional domain analysis of the human AR.
  • Molecular structure analysis of AR from AIS subjects.
  • Review of reported AR gene mutations and their locations.

Main Results:

  • Identified distinct AR domains: hormone-binding (carboxy-terminal), DNA-binding (central basic), trans-activation, and nuclear translocation.
  • Gross AR gene deletions are rare in AIS; mutations are spread across ligand and DNA-binding domains.
  • Specific mutations correlate with altered steroid binding, prostate cancer, and spinal/bulbar muscular atrophy (due to polyglutamine repeat expansion).

Conclusions:

  • AR structure-function relationships are key to understanding androgen action and insensitivity.
  • Mutations in AR's ligand and DNA-binding domains cause diverse AIS phenotypes.
  • Polyglutamine repeat length variations in the AR N-terminus are linked to spinal/bulbar muscular atrophy.

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