SINEs comprise a significant part of animal genomes and are used to study the evolution of diverse taxa. Despite significant advances in SINE studies in vertebrates and higher eukaryotes in general, their own evolution is poorly understood. We have discovered and described in detail a new Squam3 SINE specific for scaled reptiles (Squamata). The subfamilies of this SINE demonstrate different distribution in the genomes of squamates, which together with the data on similar SINEs in the tuatara allowed us to propose a scenario of their evolution in the context of reptilian evolution. Ancestral SINEs preserved in small numbers in most genomes can give rise to taxa-specific SINE families. Analysis of this aspect of SINEs can shed light on the history and mechanisms of SINE variation in reptilian genomes.

中文翻译：

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鳞状爬行动物中新的 Ther1 衍生 SINE Squam3

SINE 构成动物基因组的重要组成部分，用于研究不同类群的进化。尽管对脊椎动物和高等真核生物的 SINE 研究取得了重大进展，但对它们自身的进化却知之甚少。我们发现并详细描述了一种专门针对鳞状爬行动物 (Squamata) 的新 Squam3 SINE。该 SINE 的亚科在有鳞动物基因组中表现出不同的分布，再加上蜥蜴中类似 SINE 的数据，使我们能够在爬行动物进化的背景下提出它们的进化情景。大多数基因组中少量保存的祖先 SINE 可以产生分类单元特异性的 SINE 家族。对 SINE 这方面的分析可以揭示爬行动物基因组中 SINE 变异的历史和机制。