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相关概念视频

Mismatch Repair01:20

Mismatch Repair

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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...
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Lethal Alleles02:41

Lethal Alleles

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Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
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Mutations01:39

Mutations

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Overview
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Chi-square Analysis02:46

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The chi-square test is a statistical hypothesis test. It is used to check whether there is a significant difference between an expected value and an observed value. In the context of genetics, it enables us to either accept or reject a hypothesis, based on how much the observed values deviate from the expected values.
The chi-square test was developed by Pearson in 1990.
The first step of performing a Chi-square analysis is to establish a null hypothesis, which assumes that there is no real...
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Genome Copying Errors02:46

Genome Copying Errors

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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.
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Hardy-Weinberg Principle01:49

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Diploid organisms have two alleles of each gene, one from each parent, in their somatic cells. Therefore, each individual contributes two alleles to the gene pool of the population. The gene pool of a population is the sum of every allele of all genes within that population and has some degree of variation. Genetic variation is typically expressed as a relative frequency, which is the percentage of the total population that has a given allele, genotype or phenotype.
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In Vivo Modeling of the Morbid Human Genome using Danio rerio
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AlphaFold2 可以预测单个突变的影响.

John M McBride1, Konstantin Polev1,2, Amirbek Abdirasulov3

  • 1Center for Soft and Living Matter, Institute for Basic Science, Ulsan 44919, South Korea.

Physical review letters
|December 10, 2023
PubMed
概括
此摘要是机器生成的。

AlphaFold2 (AF) 可以预测单个突变对蛋白质结构和功能的影响. 来自突变的局部结构变化与表型结果相关,这表明AF.

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科学领域:

  • 蛋白质结构预测 蛋白质结构预测
  • 计算生物学是一种计算生物学.
  • 结构生物信息学 结构生物信息学

背景情况:

  • AlphaFold2 (AF) 是一种用于蛋白质结构预测的强大工具.
  • 评估AF用于预测单个突变效应的准确性对于其在分子生物学和医学中的应用至关重要.
  • 了解微小的遗传变异如何影响蛋白质结构和功能是生物学中的一个关键挑战.

研究的目的:

  • 评估AlphaFold2 (AF) 在预测单点突变的结构和表型后果方面的准确性.
  • 确定局部结构变形是否通过有效应变量化,可以作为突变效应的可靠预测指标.
  • 开发方法来提高单个突变的AF预测的精度和可靠性.

主要方法:

  • 将实验性蛋白质结构与AlphaFold2 (AF) 对1-3个突变不同蛋白质对的预测进行比较.
  • 使用有效的应变分析量化局部结构变形.
  • 在大约11000个蛋白质的大数据集中,将结构变化与表型数据关联起来.

主要成果:

  • 在3901个实验和AF预测结构中的1-3个突变的蛋白质对中,在局部结构变形 (有效应变) 之间观察到显著的相关性.
  • 对约11000种蛋白质的分析显示,AF预测的局部结构变化与观察到的表型变化相关.
  • 这些发现表明,AF可以平均预测单个突变效应的范围和大小.

结论:

  • AlphaFold2 (AF) 证明了预测单个突变对蛋白质结构和功能的影响的潜力.
  • 该研究提出了一种新的方法来提高AF预测的精度,并识别不可靠的预测.
  • 有效应变为量化突变诱导的结构变化和评估预测可靠性的有价值指标.