A key transcription cofactor on the nascent sex chromosomes of European tree frogs (Hyla arborea).

Abstract:

:We show that MED15, a key component of the transcription complex Mediator, lies within the nonrecombining segment of nascent sex chromosomes in the male-heterogametic Hyla arborea. Both X and Y alleles are expressed during embryonic development and differ by three frame-preserving indels (eight amino acids in total) within their glutamine-rich central part. These changes have the potential to affect the conformation of the Mediator complex and to activate genes in a sex-specific way and might thus represent the first steps toward the acquisition of a male-specific function. Alternatively, they might result from an ancestral neutral polymorphism, with different alleles picked by chance on the X and Y chromosomes when MED15 was trapped in the nonrecombining segment.

journal_name

Genetics

journal_title

Genetics

authors

Niculita-Hirzel H,Stöck M,Perrin N

doi

10.1534/genetics.108.090746

subject

Has Abstract

pub_date

2008-07-01 00:00:00

pages

1721-3

issue

3

eissn

0016-6731

issn

1943-2631

pii

genetics.108.090746

journal_volume

179

pub_type

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