The two most common alleles of the coding GGN repeat in the androgen receptor gene cause differences in protein function.

Abstract:

:Genetic studies have reported association of a polyglycine-encoding GGN repeat in exon 1 of the androgen receptor (AR) gene with common human traits. The polyglycine tract is located in the transactivating domain of the AR protein, suggesting an effect of repeat length on receptor function. Here, we compare the functional characteristics of the two most common alleles (23 and 24 repeats) and two extreme alleles (10 and 27 repeats) in a reporter gene assay in HeLa cells. A correlation between the repeat length and AR activity was observed. This is attributable to both a higher protein concentration, determined by ELISA, and a higher per-protein activity of long repeat alleles. Interestingly, protein concentration does not correlate with transcript quantity, determined by real-time PCR assays, and no influence of repeat length on protein stability could be detected in translation inhibition assays. This may suggest that repeat length affects translation efficiency. In conclusion, our data provide evidence of functional differences between the two most common alleles of the AR GGN repeat, supporting its potential role in the development of human traits.

journal_name

J Mol Endocrinol

authors

Brockschmidt FF,Nöthen MM,Hillmer AM

doi

10.1677/JME-06-0072

subject

Has Abstract

pub_date

2007-07-01 00:00:00

pages

1-8

issue

1

eissn

0952-5041

issn

1479-6813

pii

39/1/1

journal_volume

39

pub_type

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