对于蛋白质工程的SpCas9中内部域替换的结构和功能洞察力
Seonhong Kim1, Hyuk Won2, Jungnam Bae1
1Department of Biological Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
Scientific reports
|November 25, 2025
概括
研究人员通过将可用的C端区域替换为除氨酶域来设计CRISPR-Cas9. 这创建了一个多功能基础编辑器,具有可调节的编辑窗口,用于精确的基因组编辑应用程序.
科学领域:
- 分子生物学分子生物学
- 生物技术是生物技术.
- 遗传学 遗传学 是一个
背景情况:
- 克里斯普尔-Cas9是一种关键的基因组编辑技术.
- 改进CRISPR-Cas9需要整合新的功能领域.
- 确定合适的插入点对于维持Cas9功能至关重要.
研究的目的:
- 在Streptococcus pyogenes Cas9 (SpCas9) 中确定一个适合外国域集成的区域.
- 为了设计一种具有基础编辑能力的新型SpCas9变体.
- 为了评估工程基础编辑器的效率和多功能性.
主要方法:
- 对SpCas9变体的结构和生化分析.
- 位点定向的突变发生,以去除SpCas9残留物1242-1263.
- 结合大肠杆菌tRNA腺氨酸脱氨酶 (TadA) 域.
- 工程 SpCas9-TadA 基础编辑器的功能评估.
主要成果:
- 确定了SpCas9的C终端区域 (1242-1263残留物) 作为其活动不可或缺的.
- 一种经过工程设计的SpCas9-TadA变种表现出与ABE8e相比的除效率.
- 链接器设计提供了调制基本编辑窗口的潜力.
结论:
- 确定SpCas9区域的有针对性的工程使得开发新的基因组编辑工具成为可能.
- 该SpCas9-TadA变体代表了一个有前途的平台,用于精确的基础编辑.
- 这种方法促进了基于CRISPR的技术的创建,这些技术更具多功能性和效率.
更多相关视频
相关概念视频
Protein Complexes with Interchangeable Parts
2.9K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
2.9K
Protein Complexes with Interchangeable Parts
2.1K
2.1K
Conservation of Protein Domains Over Different Proteins
14.0K
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...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
14.0K
Structural Protein Function
3.2K
3.2K
Structural Protein Function
29.7K
Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
29.7K
Conserved Binding Sites
5.0K
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...
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...
5.0K


