在计算指导下,将一个不连续的图案的骨干移植到蛋白质支架上
Mihai L Azoitei1, Bruno E Correia, Yih-En Andrew Ban
1Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.
概括
蛋白质工程师现在可以通过将特定结构移植到脚手架蛋白质上来设计新的功能性蛋白质. 这种方法成功地模仿了一个关键的HIV表位,使得高亲和抗体结合.
科学领域:
- 蛋白质工程是一种蛋白质工程.
- 计算生物学是一种计算生物学.
- 免疫学 免疫学 免疫学
背景情况:
- 通过脊柱结构操纵控制蛋白质相互作用和功能仍然是一个重大挑战.
- 设计功能性蛋白质需要精确控制结构模仿.
研究的目的:
- 开发一种设计功能性蛋白质的方法,通过将表位细胞移植到支架蛋白质上.
- 为了创建新的蛋白质支架,模仿HIV gp120表位的结构.
主要方法:
- 综合计算设计与实验选择.
- 将两段HIV gp120表位的脊柱和侧链移植到与之无关的支架蛋白上.
- 利用晶体分析来确定脚手架-抗体复合物的结构.
主要成果:
- 设计的支架对目标抗体b12具有很高的特异性和亲和力,与原生gp120表位相比.
- 结晶学分析证实了原始gp120-b12复合物的高结构模仿性.
- 开发的方法证明了设计其他功能性蛋白质的通用性.
结论:
- 脊椎移植是蛋白质工程的一个可行的策略.
- 这种方法可以创建具有特定结合性质的新型蛋白质支架.
- 该方法对通过结构模拟设计多种功能蛋白具有前景.
相关概念视频
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Interaction domains in cell signaling
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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.
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Protein Complexes with Interchangeable Parts
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 to...
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Protein Complex Assembly
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
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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...


