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  1. 010 学術雑誌論文
  2. 颯田, 葉子 / SATTA, Yoko

No Evidence for a Second Evolutionary Stratum during the Early Evolution of Mammalian Sex Chromosomes

https://ir.soken.ac.jp/records/3324
https://ir.soken.ac.jp/records/3324
57150b76-f937-40b3-83a9-413e8507e5f3
名前 / ファイル ライセンス アクション
fetchObject.pdf fetchObject (1.1 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2013-01-17
タイトル
タイトル No Evidence for a Second Evolutionary Stratum during the Early Evolution of Mammalian Sex Chromosomes
タイトル
タイトル No Evidence for a Second Evolutionary Stratum during the Early Evolution of Mammalian Sex Chromosomes
言語 en
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
著者 KATSURA, Yukako

× KATSURA, Yukako

KATSURA, Yukako

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SATTA, Yoko

× SATTA, Yoko

SATTA, Yoko

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著者別名 颯田, 葉子

× 颯田, 葉子

颯田, 葉子

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抄録
内容記述タイプ Abstract
内容記述 Mammalian sex chromosomes originated from a pair of autosomes, and homologous genes on the sex chromosomes (gametologs) differentiated through recombination arrest between the chromosomes. It was hypothesized that this differentiation in eutherians took place in a stepwise fashion and left a footprint on the X chromosome termed “evolutionary strata.” The evolutionary stratum hypothesis claims that strata 1 and 2 (which correspond to the first two steps of chromosomal differentiation) were generated in the stem lineage of Theria or before the divergence between eutherians and marsupials. However, this prediction relied solely on the molecular clock hypothesis between pairs of human gametologs, and molecular evolution of marsupial sex chromosomal genes has not yet been investigated. In this study, we analyzed the following 7 pairs of marsupial gametologs, together with their eutherian orthologs that reside in stratum 1 or 2: SOX3/SRY, RBMX/Y, RPS4X/Y, HSFX/Y, XKRX/Y, SMCX/Y (KDM5C/D, JARID1C/D), and UBE1X/Y (UBA1/UBA1Y). Phylogenetic analyses and estimated divergence time of these gametologs reveal that they all differentiated at the same time in the therian ancestor. We have also provided strong evidence for gene conversion that occurred in the 3′ region of the eutherian stratum 2 genes (SMCX/Y and UBE1X/Y). The results of the present study show that (1) there is no compelling evidence for the second stratum in the stem lineage of Theria; (2) gene conversion, which may have occurred between SMCX/Y and UBE1X/Y in the eutherian lineage, potentially accounts for their apparently lower degree of overall divergence.
書誌情報 PLoS ONE
en : PLoS ONE

巻 7, 号 10, 発行日 2012-10-19
出版者
出版者 Public Library of Science
ISSN
収録物識別子タイプ ISSN
収録物識別子 19326203
DOI
関連タイプ isIdenticalTo
識別子タイプ DOI
関連識別子 https://doi.org/10.1371/journal.pone.0097169
関連名称 10.1371/journal.pone.0045488
権利
権利情報 © Katsura, Satta
関連サイト
識別子タイプ URI
関連識別子 http://www.plos.org/about/open-access/license/
関連名称 Copyright
フォーマット
内容記述タイプ Other
内容記述 application/pdf
著者版フラグ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
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