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相关概念视频

Conserved Binding Sites01:49

Conserved Binding Sites

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.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Genome Copying Errors02:46

Genome Copying Errors

DNA replication is a well-evolved process that copies millions of base pairs with high fidelity during each cell division. Occasionally a wrong base or a long stretch of wrong bases may get added to the daughter strands. If the errors are left unchecked, cells might accumulate several mutations that might endanger their  survival. Therefore, the copying errors are checked and repaired at three levels.
Multi-species Conserved Sequences02:51

Multi-species Conserved Sequences

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 DNA...
Conserved Binding Sites01:49

Conserved Binding Sites

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.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Mismatch Repair01:20

Mismatch Repair

Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
Genetic Material01:20

Genetic Material

Within the human body, a complex and detailed system of trillions of cells works in unison to sustain life. Each cell houses a nucleus, which contains 46 chromosomes divided into 23 pairs. Chromosomes are highly coiled structures made of the genetic material DNA. These chromosomes are essential carriers of genetic information, with half inherited from the mother through her egg and the other half from the father's sperm, combining to create the unique genetic makeup of an individual.

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相关实验视频

Updated: Jul 14, 2026

Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay (EMSA) and DNA-affinity Precipitation Assay (DAPA)
11:35

Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay (EMSA) and DNA-affinity Precipitation Assay (DAPA)

Published on: August 21, 2016

人类基因组中的超保守元素

Gill Bejerano1, Michael Pheasant, Igor Makunin

  • 1Department of Biomolecular Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA. jill@soe.ucsc.edu

Science (New York, N.Y.)
|May 8, 2004
PubMed
概括

研究人员在人类基因组中确定了481个超保守元素 (UCE),显示了哺乳动物和脊椎动物的高度保护. 这些UCE对发育至关重要,可能对脊椎动物本体产生至关重要.

科学领域:

  • 基因组学就是基因组学.
  • 进行比较基因组学.
  • 进化生物学 进化生物学

背景情况:

  • 超保存元素 (UCE) 是跨物种高度保存的DNA序列.
  • 了解UCE对于破译基因组进化和功能至关重要.

研究的目的:

  • 在人类基因组中识别和描述超保存元素 (UCE).
  • 研究不同脊椎动物物种中这些元素的保护模式.
  • 探索UCE的基因组位置和潜在功能.

主要方法:

  • 对人类,老鼠,小鼠,,狗和鱼的基因组进行比较基因组分析.
  • 识别DNA片段在正统区域之间具有100%的身份.
  • 对涉及RNA处理,转录和发育的基因相对于UCE位置的分析.

主要成果:

  • 确定了481个>200个基对 (bp) 的段落,在人类,老鼠和小鼠基因组中具有100%的相同性.
  • 这些部分在和狗中显示出高保育率 (95-99%的同一性),在鱼类中显示出显著的保育率.
  • UCEs经常位于参与RNA处理,转录调节和发育的基因附近.

结论:

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Stability and Structure of Bat Major Histocompatibility Complex Class I with Heterologous β2-Microglobulin
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Last Updated: Jul 14, 2026

Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay (EMSA) and DNA-affinity Precipitation Assay (DAPA)
11:35

Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay (EMSA) and DNA-affinity Precipitation Assay (DAPA)

Published on: August 21, 2016

Using Sniper-Cas9 to Minimize Off-target Effects of CRISPR-Cas9 Without the Loss of On-target Activity Via Directed Evolution
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Using Sniper-Cas9 to Minimize Off-target Effects of CRISPR-Cas9 Without the Loss of On-target Activity Via Directed Evolution

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Published on: March 10, 2021

  • UCEs代表了脊椎动物中高度保存的基因元素的新型类别.
  • 它们的保护水平超过了蛋白质的保护水平,这表明它们具有关键的功能作用.
  • UCE可能对哺乳动物和其他脊椎动物的本体发生是必不可少的,尽管它们的精确功能和进化起源需要进一步调查.