Garrido-Ramos Manuel A
Departamento de Genética, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain.
Genes (Basel). 2017 Sep 18;8(9):230. doi: 10.3390/genes8090230.
Satellite DNA represents one of the most fascinating parts of the repetitive fraction of the eukaryotic genome. Since the discovery of highly repetitive tandem DNA in the 1960s, a lot of literature has extensively covered various topics related to the structure, organization, function, and evolution of such sequences. Today, with the advent of genomic tools, the study of satellite DNA has regained a great interest. Thus, Next-Generation Sequencing (NGS), together with high-throughput in silico analysis of the information contained in NGS reads, has revolutionized the analysis of the repetitive fraction of the eukaryotic genomes. The whole of the historical and current approaches to the topic gives us a broad view of the function and evolution of satellite DNA and its role in chromosomal evolution. Currently, we have extensive information on the molecular, chromosomal, biological, and population factors that affect the evolutionary fate of satellite DNA, knowledge that gives rise to a series of hypotheses that get on well with each other about the origin, spreading, and evolution of satellite DNA. In this paper, I review these hypotheses from a methodological, conceptual, and historical perspective and frame them in the context of chromosomal organization and evolution.
卫星DNA是真核生物基因组重复序列中最具吸引力的部分之一。自20世纪60年代发现高度重复的串联DNA以来,大量文献广泛涵盖了与这类序列的结构、组织、功能和进化相关的各种主题。如今,随着基因组工具的出现,卫星DNA的研究再次引起了人们极大的兴趣。因此,新一代测序(NGS)以及对NGS读数中所含信息的高通量计算机分析,彻底改变了对真核生物基因组重复序列的分析。关于这一主题的所有历史和当前方法,让我们对卫星DNA的功能和进化及其在染色体进化中的作用有了广泛的认识。目前,我们拥有关于影响卫星DNA进化命运的分子、染色体、生物学和群体因素的广泛信息,这些知识催生了一系列关于卫星DNA的起源、传播和进化且相互契合的假说。在本文中,我将从方法学、概念和历史的角度审视这些假说,并将它们置于染色体组织和进化的背景中进行阐述。