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相关概念视频

Translation01:31

Translation

14.6K
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Proteins are...
14.6K
Mutations01:39

Mutations

80.9K
Overview
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Comparing Copy Number Variations and SNPs02:26

Comparing Copy Number Variations and SNPs

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Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
17.6K
Alternative RNA Splicing02:18

Alternative RNA Splicing

21.0K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
21.0K
Genome Copying Errors02:46

Genome Copying Errors

4.2K
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.
4.2K
Mismatch Repair01:20

Mismatch Repair

4.8K
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...
4.8K

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相关实验视频

Updated: Jun 11, 2025

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
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In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila

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引起人类疾病的病原性编码变体的普遍错位

Jessica Lacoste1, Marzieh Haghighi2, Shahan Haider1

  • 1Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada.

Cell
|October 1, 2024
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概括

一个新的高通量成像平台揭示了蛋白质错位是导致疾病的遗传变异的常见后果,影响疾病的严重程度,并提供了对不确定的变异的洞察力.

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In Vivo Modeling of the Morbid Human Genome using Danio rerio
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相关实验视频

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科学领域:

  • 基因组学
  • 分子生物学
  • 生物化学

背景情况:

  • 通过广泛的测序识别出成千上万种引起疾病的错误变体.
  • 评估每个变异的功能影响是遗传研究中的一个重大瓶.

研究的目的:

  • 建立一个高通量成像平台来测试编码变异对蛋白质定位的影响.
  • 在许多基因和表型中评估大量误解变异.

主要方法:

  • 开发一个高通量成像平台.
  • 测试了1000多个基因中的3448个错误变异.
  • 对蛋白质定位模式的分析.

主要成果:

  • 错位化是编码变异的常见后果,影响了大约六分之一的致病错位变异.
  • 错位影响所有细胞区和衰退性和主导性疾病.
  • 蛋白质错位主要是由蛋白质稳定性和膜插入的变化驱动的.

结论:

  • 蛋白质错位是致病性错位变异的常见结果.
  • 错位化模式提供了关于型,疾病严重程度和不确定的变异的见解.
  • 开发的平台和数据为了解人类疾病的编码变异提供了宝贵的资源.