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相关概念视频

Multi-species Conserved Sequences02:51

Multi-species Conserved Sequences

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Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale  studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
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Conservation of Protein Domains02:26

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Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

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Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
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Diversity of Protists I01:15

Diversity of Protists I

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Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
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Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
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Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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相关实验视频

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Ablation of a Single Cell From Eight-cell Embryos of the Amphipod Crustacean Parhyale hawaiensis
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揭开Peracarida与超保守元素的关系

Tammy Iwasa-Arai1, Katrin Linse2, Sónia C S Andrade3

  • 1Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil; Museum of Comparative Zoology, Department of Organismic & Evolutionary Biology, Harvard University, Cambridge, MA, United States.

Molecular phylogenetics and evolution
|December 18, 2025
PubMed
概括

这项研究使用超保存元素 (UCE) 来构建Peracarida甲类的基因组框架. 它解决了更高层次的关系,证实了Peracarida单基和Mancoida类.

关键词:
甲类的甲类动物马拉科斯特拉卡 (Malacostraca) 是一个小岛屿.类类动物 (Pancrustacea) 是一种类动物.人类基因组学是什么?

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科学领域:

  • 甲动物生物学 甲动物生物学
  • 进化生物学是进化的生物学.
  • 人类基因组学是什么?

背景情况:

  • 甲类 (Peracarida) 是一个多样化的甲类群体,具有复杂的进化关系.
  • 之前的研究已经质疑Peracarida中更高层次的关系.
  • 有限的研究利用了现代遗传方法进行广泛的分类型采样.

研究的目的:

  • 为了研究Peracarida中更高层次的遗传关系.
  • 通过使用新型遗传标记物,为Peracarida建立一个强大的家族基因学框架.
  • 为了解决长期存在的问题在malacostracan进化.

主要方法:

  • 开发一种用于 peracarids 的超保守元素 (UCE) 的新型探针集.
  • 用连接和凝聚式方法进行的族群基因组分析.
  • 包括新收集的南极材料和现有的收藏标本.

主要成果:

  • 强有力的支持Peracarida和Mancoida类 (Isopoda + Tanaidacea + Cumacea) 的单一性.
  • 热波纳西亚 (Thermosbaenacea) 始终被认为是所有其他 peracarids 的姊妹群.
  • 对两足动物关系的新见解,将Corophiida和Hyperiidea作为早期分支的血统.
  • 伊索波达的单,与形态学数据一致的Oniscidea.

结论:

  • 这项研究为Peracarida提供了第一个族系学框架之一.
  • 超保存元素 (UCE) 有效地解决了甲类动物的深层进化关系.
  • 这些发现为了解马拉科斯特拉坎的进化提供了重大进展.