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Nature封面故事:白颊长臂猿的基因组

摘要 : 发表于2014年9月10日的《Nature》杂志上的一项关于白颊长臂猿基因组的论文中,提供了关于这样一个介于“旧世界”猴子与类人猿之间的物种类别的生物学和进化史的有趣信息。
Nature封面故事:白颊长臂猿的基因组

很多种长臂猿都是来自东南亚的小型树栖猿类,其中大多数都被世界自然保护联盟(IUCN)列为“濒危”或“极度濒危”物种。

Lucia Carbone及同事在其所发表的关于白颊长臂猿基因组的论文中,提供了关于这样一个介于“旧世界”猴子与类人猿之间的物种类别的生物学和进化史的有趣信息。

作者对一个长臂猿特有的反转录转座子何以有可能成为长臂猿基因组可塑性之源进行了研究。迅速的核型演化结合多次气候和环境变化,也许可解释四个长臂猿属几乎瞬时发生的分化。对涉及前肢发育和结缔组织的基因的选择,也许与长臂猿在热带林冠中独特的运动方式有关。

原文摘要:

Gibbon genome and the fast karyotype evolution of small apes

Lucia Carbone, R. Alan Harris, Sante Gnerre, Krishna R. Veeramah, Belen Lorente-Galdos,John Huddleston, Thomas J. Meyer, Javier Herrero, Christian Roos, Bronwen Aken, Fabio Anaclerio, Nicoletta Archidiacono, Carl Baker, Daniel Barrell, Mark A. Batzer, Kathryn Beal,Antoine Blancher, Craig L. Bohrson, Markus Brameier, Michael S. Campbell, Oronzo Capozzi, Claudio Casola, Giorgia Chiatante, Andrew Cree, Annette Damert et al.

Gibbons are small arboreal apes that display an accelerated rate of evolutionary chromosomal rearrangement and occupy a key node in the primate phylogeny between Old World monkeys and great apes. Here we present the assembly and analysis of a northern white-cheeked gibbon (Nomascus leucogenys) genome. We describe the propensity for a gibbon-specific retrotransposon (LAVA) to insert into chromosome segregation genes and alter transcription by providing a premature termination site, suggesting a possible molecular mechanism for the genome plasticity of the gibbon lineage. We further show that the gibbon genera (Nomascus, Hylobates, Hoolock andSymphalangus) experienced a near-instantaneous radiation ~5 million years ago, coincident with major geographical changes in southeast Asia that caused cycles of habitat compression and expansion. Finally, we identify signatures of positive selection in genes important for forelimb development (TBX5) and connective tissues (COL1A1) that may have been involved in the adaptation of gibbons to their arboreal habitat.

 

对应Nature杂志: 2014年9月11日Nature杂志精选

来源: Nature 浏览次数:176

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