CDRxAbs: antibody small-molecule conjugates with computationally designed target-binding synergy.

IF 2.6 4区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY
Jingzhou Wang, Aiden J Aceves, Nicholas J Friesenhahn, Stephen L Mayo
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引用次数: 0

Abstract

Bioconjugates as therapeutic modalities combine the advantages and offset the disadvantages of their constituent parts to achieve a refined spectrum of action. We combine the concept of bioconjugation with the full atomic simulation capability of computational protein design to define a new class of molecular recognition agents: CDR-extended antibodies, abbreviated as CDRxAbs. A CDRxAb incorporates a covalently attached small molecule into an antibody/target binding interface using computational protein design to create an antibody small-molecule conjugate that binds tighter to the target of the small molecule than the small molecule would alone. CDRxAbs are also expected to increase the target binding specificity of their associated small molecules. In a proof-of-concept study using monomeric streptavidin/biotin pairs at either a nanomolar or micromolar-level initial affinity, we designed nanobody-biotin conjugates that exhibited >20-fold affinity improvement against their protein targets with step-wise optimization of binding kinetics and overall protein stability. The workflow explored through this process promises a novel approach to optimize small-molecule based therapeutics and to explore new chemical and target space for molecular-recognition agents in general.

生物偶联物作为治疗方式结合了其组成部分的优点并抵消了其缺点,以实现精细的作用谱。我们将生物偶联的概念与计算蛋白设计的全原子模拟能力相结合,定义了一类新的分子识别剂:cdr扩展抗体,简称CDRxAbs。CDRxAb利用计算蛋白设计将共价附着的小分子结合到抗体/靶标结合界面中,从而产生比小分子单独结合更紧密的抗体小分子偶联物。CDRxAbs也有望提高其相关小分子的靶向结合特异性。在一项概念验证研究中,我们设计了纳米体-生物素偶联物,通过逐步优化结合动力学和整体蛋白质稳定性,对蛋白质靶点的亲和力提高了20倍。通过这一过程探索的工作流程有望为优化基于小分子的治疗方法提供一种新方法,并为分子识别剂探索新的化学和靶标空间。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Protein Engineering Design & Selection
Protein Engineering Design & Selection 生物-生化与分子生物学
CiteScore
3.30
自引率
4.20%
发文量
14
审稿时长
6-12 weeks
期刊介绍: Protein Engineering, Design and Selection (PEDS) publishes high-quality research papers and review articles relevant to the engineering, design and selection of proteins for use in biotechnology and therapy, and for understanding the fundamental link between protein sequence, structure, dynamics, function, and evolution.
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