通过绑定自由能源驱动的CARF领域的合规过渡
Guodong Hu1, Jin Qian1, Chengfei Cai1
1Jiangsu Key Laboratory of Intelligent Drug Screening and Repositioning, School of Information Engineering, Taizhou University, Taizhou 225300, China.
Journal of chemical information and modeling
|January 14, 2026
概括
第三类CRISPR系统使用循环氧基酸 (cAn) 来激活CARF域. 分子动力学模拟揭示了向关闭的CARF状态的转变,由intermonomer相互作用驱动,增强基于CRISPR的工具.
科学领域:
- 分子生物学分子生物学
- 生物化学 生物化学
- 结构生物学 结构生物学
背景情况:
- 第三类CRISPR系统赋予了对外来核酸的适应性免疫力.
- 循环橄基酸盐 (cAn) 第二信使激活了与CRISPR相关的罗斯曼折叠 (CARF) 域的效应蛋白.
- CARF的apo形式存在于封闭状态,与其cA4-bound开放形状不同.
研究的目的:
- 研究CARF域从开放状态到封闭状态的结构转变.
- 了解这种形状变化背后的分子机制.
- 为优化基于CRISPR的基因操纵工具提供见解.
主要方法:
- 用多种类型的分子动力学 (MD) 模拟来研究CARF的结构动力学.
- 在不同状态下对键和单体间接触的比较分析.
- 进行了具有约束力的自由能量计算,以评估CARF链系亲和力.
主要成果:
- MD模拟显示了CARF向封闭状态的单向形状转移.
- 这种转变受到cA4-结合残留物的灵活性的影响.
- 形状变化主要发生在CARF单体之间,加强了单体间相互作用.
- 具有约束力的自由能量计算证实了在封闭状态下更高的亲和力.
结论:
- 卡尔夫的形状转变是一个由能量驱动的过程.
- 体间相互作用在稳定封闭状态方面发挥着至关重要的作用.
- 了解这种机制可以帮助开发先进的CRISPR技术.
相关概念视频
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
Conserved Binding Sites
1.9K
1.9K
Cooperative Allosteric Transitions
2.6K
2.6K
Cooperative Allosteric Transitions
8.6K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
8.6K
Cooperative Allosteric Transitions
3.0K
3.0K
Protein Folding
126.2K
Overview
126.2K


