CSF2RA, ANT3, and STS are autosomal in marsupials: implications for the origin of the pseudoautosomal region of mammalian sex chromosomes

CSF2RA, ANT3, and STS are autosomal in marsupials: implications for the origin of the... The X and Y Chromosomes (Chrs) of eutherian (“placental”) mammals share a pseudo-autosomal region (PAR) that pairs and recombines at meiosis. In humans and other eutherians, the PAR contains several active genes and has also been thought to be critical for pairing and fertility. In order to explore the origin of the PAR, we cloned and mapped three human or mouse pseudoautosomal genes in marsupials, a group of mammals that diverged from eutherians about 130 (MYrBP). All three genes were autosomal in marsupials, and two co-localized with other human Xp genes on an autosome. This implies that the human PAR, like most of human Xp, represents a relic of an autosomal region added to both X and Y Chrs between 80 and 150 MYrBP. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mammalian Genome Springer Journals

CSF2RA, ANT3, and STS are autosomal in marsupials: implications for the origin of the pseudoautosomal region of mammalian sex chromosomes

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Publisher
Springer-Verlag
Copyright
Copyright © 1998 by Springer-Verlag
Subject
Life Sciences; Cell Biology; Anatomy; Zoology
ISSN
0938-8990
eISSN
1432-1777
D.O.I.
10.1007/s003359900772
Publisher site
See Article on Publisher Site

Abstract

The X and Y Chromosomes (Chrs) of eutherian (“placental”) mammals share a pseudo-autosomal region (PAR) that pairs and recombines at meiosis. In humans and other eutherians, the PAR contains several active genes and has also been thought to be critical for pairing and fertility. In order to explore the origin of the PAR, we cloned and mapped three human or mouse pseudoautosomal genes in marsupials, a group of mammals that diverged from eutherians about 130 (MYrBP). All three genes were autosomal in marsupials, and two co-localized with other human Xp genes on an autosome. This implies that the human PAR, like most of human Xp, represents a relic of an autosomal region added to both X and Y Chrs between 80 and 150 MYrBP.

Journal

Mammalian GenomeSpringer Journals

Published: Mar 27, 2009

References

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