相关实验视频

Updated: Jun 4, 2025

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy

Published on: February 5, 2020

高精度蛋白质结合的结构基础及其应用

Kelvin Han Chung Chong^1,2, Lichao Liu³, Rae Chua^2,4

¹School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 636921, Singapore.

Journal of the American Chemical Society

|January 2, 2025

概括

研究人员设计了Connectase, 一种用于精确蛋白质结合的新型酶, 克服了现有方法的局限性. 在复杂的生物环境中进行高精度蛋白结合的修改.

科学领域:

生物化学
结构生物学
分子工程

背景情况:

与化学方法相比,酶催化蛋白质修饰提供了更高的精度和兼容性.
目前存在的酶如Sortase A和OaAEP1在目标特异性和复杂生物环境中的应用方面存在局限性.
连接酶是一种重新设计的蛋白质酶,对蛋白质结合有希望,但缺乏可优化的过程性和结构数据.

研究的目的:

通过X射线结晶学阐明MmConnectase (MmCET) 活动的结构基础.
设计Connectase以提高蛋白质结合的精度和过程性.
在具有挑战性的生物环境中实现高精度的蛋白质结合.

主要方法:

在apo和基质结合状态下MmmConnectase的X射线晶体学.
使用MjCET进行比较结构分析以确定关键的功能差异.
针对N端基质识别动机的位点定向突变发生.
单分子蛋白展开实验以评估结合效率和过程性.

主要成果:

确定了MmConnectase的X射线晶体结构,揭示了其结合活性的结构基础.
确定了MmConnectase与其不活跃的对应物MjCET的主要结构特征.
建议并验证的修改抑制蛋白酶活性并提高结合精度.
使用优化的Connectase和OaAEP1 ((C247A) 进行了逐步并联的证明,用于聚合物形成.

结论:

对MmConnectase的结构洞察力有助于其进行先进的蛋白质结合工程.
在复杂的生物环境中实现高精度的蛋白质结合,如细胞培养.
优化Connectase显示了用于创建定义的蛋白质聚合物的增强过程性.

更多相关视频

In Situ Monitoring of Transiently Formed Molecular Chaperone Assemblies in Bacteria, Yeast, and Human Cells

In Situ Monitoring of Transiently Formed Molecular Chaperone Assemblies in Bacteria, Yeast, and Human Cells

Published on: September 2, 2019

Detection of Heterodimerization of Protein Isoforms Using an in Situ Proximity Ligation Assay

Detection of Heterodimerization of Protein Isoforms Using an in Situ Proximity Ligation Assay

Published on: October 20, 2018

相关概念视频

Ligand Binding Sites

Ligand Binding Sites

Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...

Ligand Binding and Linkage

Ligand Binding and Linkage

Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...