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相关概念视频

CRISPR01:59

CRISPR

50.8K
Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
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The genome sequences of <i>Danio albolineatus</i> (Blyth, 1860), <i>Danio choprai</i> Hora, 1928, <i>Danio jaintianensis</i> (Sen, 2007) and <i>Danio tinwini</i> [Kullander & Fang], 2009.

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Genomic and genetic insights into speciation and pigment pattern diversification in <i>Danio</i> fishes.

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kcnj13 regulates pigment cell shapes in zebrafish and has diverged by cis-regulatory evolution between Danio species.

Development (Cambridge, England)·2023
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Developmental genetics with model organisms.

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Efficient PAM-Less Base Editing for Zebrafish Modeling of Human Genetic Disease with zSpRY-ABE8e
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在斑马鱼中使用改性Cas9蛋白进行高效的基因组编辑.

Laura Dorner1, Benedikt Stratmann1, Laura Bader1

  • 1Max Planck Institute for Biology, RG Colour Pattern Evolution, Tuebingen, Max-Planck-Ring 5, 72076 Tuebingen, Germany.

Biology open
|March 28, 2024
PubMed
概括

研究人员通过开发新的Cas9蛋白质变体来增强斑马鱼的CRISPR基因编辑. 这些变体提高了基因淘汰效率,并通过同质导向修复 (HDR) 实现了精确的单基因对编辑.

科学领域:

  • 遗传学和基因组学 在
  • 分子生物学分子生物学
  • 模型生物模型生物

背景情况:

  • 斑马鱼 (Danio rerio) 是生物医学研究中的关键模型生物,因为它们具有遗传处理能力.
  • 克里斯普尔/卡斯系统彻底改变了基因编辑,通过非同类末端连接 (NHEJ) 实现了高效的基因淘汰生成.
  • 在斑马鱼中,用于精确基对编辑的同质导向修复 (HDR) 的效率较低,通常需要广泛的基因定型.

研究的目的:

  • 评估Cas9蛋白质变体SpRY针对斑马鱼基因组中的特定位点的疗效.
  • 为了提高基因淘汰和同质导向修复 (HDR) 在斑马鱼基因编辑中的效率.
  • 开发具有成本效益的协议,用于生成改进的Cas9变体,并促进斑马鱼精确的基因组修改.

主要方法:

  • 利用了Cas9蛋白质变体SpRY,它具有放松的PAM (原生空间器相邻动机) 要求.
  • 将人工核定位信号 (aNLS) 纳入 Cas9 蛋白质变体中.
  • 应用CRISPR/Cas系统用于斑马鱼的基因编辑,重点关注NHEJ和HDR通路.

主要成果:

  • 证实SPRY可以准斑马鱼基因组中的某些部位.
  • 证明具有aNLS的Cas9变体显著提高基因淘汰效率.
关键词:
阿尔比诺人是什么意思在 kcnj1313 中.克里斯普尔是什么意思?克里斯普尔是什么意思?颜料图案的演变 颜料图案的演变斑马鱼是一种斑马鱼.

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  • 显示HDR的频率增加,促进斑马鱼基因组中高效的单基因对修改.

    • 结论:

    • Cas9蛋白质变体,特别是SpRY和aNLS的变体,为斑马鱼基因组编辑提供了改进的工具.
    • 开发的协议允许在斑马鱼中进行更有效,更精确的基因修改,包括单基因对编辑.
    • 这些进步为产生多功能Cas9变异和在这个重要的模型生物体中实现高效的基因编辑提供了经济有效的指南.