Anna Voleníková, Karolína Lukšíková, Pablo Mora, Tomáš Pavlica, Marie Altmanová, Jana Štundlová, Šárka Pelikánová, Sergey A Simanovsky, Marek Jankásek, Martin Reichard, Petr Nguyen, Alexandr Sember
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引用次数: 0
摘要
卫星DNA (satDNA)是一类快速进化的串联重复序列，一些单体参与着丝粒的组织和功能。为了确定与着丝粒区相关的重复序列，我们研究了非洲一年生鳉属(Nothobranchius)南部和沿海分支的satDNA。分子细胞遗传学和生物信息学分析显示，两个先前鉴定的卫星，这里指定为NkadSat01-77和NfurSat01-348，仅在南方分支的一个谱系中与着丝粒相关。然而，NfurSat01-348在三个沿海分支成员的着丝粒外被检测到。我们还发现了一种与N. foerschi, N. guentheri和N. rubripinis(周围)着丝粒相关的新satDNA NrubSat01-48。我们的研究结果揭示了Nothobranchius属两个分支中与(围)着丝粒相关的satDNA的快速周转及其不同的进化趋势。
Fast satellite DNA evolution in Nothobranchius annual killifishes.
Satellite DNA (satDNA) is a rapidly evolving class of tandem repeats, with some monomers being involved in centromere organization and function. To identify repeats associated with (peri)centromeric regions, we investigated satDNA across Southern and Coastal clades of African annual killifishes of the genus Nothobranchius. Molecular cytogenetic and bioinformatic analyses revealed that two previously identified satellites, designated here as NkadSat01-77 and NfurSat01-348, are associated with (peri)centromeres only in one lineage of the Southern clade. NfurSat01-348 was, however, additionally detected outside centromeres in three members of the Coastal clade. We also identified a novel satDNA, NrubSat01-48, associated with (peri)centromeres in N. foerschi, N. guentheri, and N. rubripinnis. Our findings revealed fast turnover of satDNA associated with (peri)centromeres and different trends in their evolution in two clades of the genus Nothobranchius.
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