超稳定,最小长度和凸结尾的原异构体
Tomas Fiala1,2, Philipp Bittner1, Rahel Heeb1
1Laboratory of Organic Chemistry, ETH Zürich, Vladimir-Prelog-Weg 3, Zürich, 8093, Switzerland.
Angewandte Chemie (International ed. in English)
|May 9, 2025
概括
科学家们开发了一种新方法来制造合成原异构分离剂. 这种技术精确地控制了原组合,克服了生产具有可调节性质的特定三环结构的挑战.
科学领域:
- 生物化学 生物化学
- 材料科学 材料科学 材料科学
- 合成生物学 合成生物学
背景情况:
- 自然的原蛋白通常是异构三元体,由三个不同的链组成的复杂的三重螺旋体.
- 合成异构三元原蛋白是很困难的,因为可能出现许多不必要的螺旋组合.
研究的目的:
- 开发一种用于组装具有可控长度,热稳定性和链排列的合成原异构体的通用方法.
- 为了克服选择性异构三聚物形成的挑战,并实现对组装过程的热力学控制.
主要方法:
- 在 (2S,4S) -4-阿米诺普罗林和阿斯巴酸盐残留物之间利用了互补的链间盐桥来驱动组装.
- 优化化条件,从动力捕捉不必要的剪裁器转向选择性热力学控制.
- 采用框架转移技术来设计特定的螺旋架构.
主要成果:
- 成功组装了具有广泛的长度和热稳定性的原体异构分离剂.
- 创建了迄今为止报告的最稳定的超分子异构分离体 (32个残留物,Tm = 76°C) 和最短的稳定异构分离体 (17个残留物,Tm = 19°C).
- 通过转移实现了第一个原三环螺旋的实例,其的末端通过转移.
结论:
- 建立了一种设计和合成具有可预测性质的异构原蛋白的多功能方法.
- 证明了精确控制原蛋白超分子结构,稳定性和终端组功能的能力.
- 通过量身定制的原体合成,为生物材料和蛋白质工程开辟了新的途径.
相关概念视频
Fibril-associated Collagen
2.5K
Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
2.5K
Type IV Collagen of Basal Lamina
2.1K
Type IV collagen is a 400 nm long, network-forming collagen that acts as a barrier between the epithelial and endothelial cells. Type IV collagen forms the backbone of the basement membrane by scaffolding with laminin, entactin, proteoglycans, and fibronectin. Apart from rendering structural support to the basement membrane, it also helps entail signaling potentials necessary for both pathological and physiological functions.
A type IV collagen molecule has six alpha chains which can...
A type IV collagen molecule has six alpha chains which can...
2.1K
Collagens are the Major Structural Proteins of ECM
4.0K
Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. Collagen fiber is made from fibrous protein subunits linked together to form a long, straight fiber. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. These fibers hold connective tissues together, even during the body's movement.
Connective tissue proper includes loose...
Connective tissue proper includes loose...
4.0K
Structural Protein Function
27.3K
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...
27.3K
Fibrous Proteins
1.9K
Fibrous proteins are either long and narrow proteins or assemble to form long and thin structures. They contain repetitive units and usually consist of either alpha helices or beta sheets and, in rare cases, a mix of both. The amino acids in the primary structure often consist of repeating amino acid sequences. The role of fibrous proteins is primarily structural. Many are located in the extracellular matrix and are present in connective tissues to impart strength and joint mobility. They are...
1.9K
The Structure of Intermediate Filaments
3.8K
The intermediate filaments are one of three widely studied cytoskeletal filaments. They are so named as their diameter (10 nm) is in between that of microfilaments (7 nm) and the microtubules (25 nm). These filaments are highly stable and can remain intact when exposed to high salt concentrations and detergents. These filaments are responsible for providing stability and mechanical support to the cells. They also help in cell adhesion and maintaining tissue integrity.
Intermediate...
Intermediate...
3.8K


