作者:Claudio Aquino、Mohosin Sarkar、Michael J. Chalmers、Kimberly Mendes、Thomas Kodadek、Glenn C. Micalizio
DOI:10.1038/nchem.1200
日期:2012.2
The discovery of new compounds for the pharmacological manipulation of protein function often embraces the screening of compound collections, and it is widely recognized that natural products offer beneficial characteristics as protein ligands. Much effort has therefore been focused on ânatural product-likeâ libraries, yet the synthesis and screening of such libraries is often limited by one or more of the following: modest library sizes and structural diversity, conformational heterogeneity and the costs associated with the substantial infrastructure of modern high-throughput screening centres. Here, we describe the design and execution of an approach to this broad problem by merging principles associated with biologically inspired oligomerization and the structure of polyketide-derived natural products. A novel class of chiral and conformationally constrained oligomers is described (termed âchiral oligomers of pentenoic amidesâ, COPA), which offers compatibility with split-and-pool methods and can be screened en masse in a batch mode. We demonstrate that a COPA library containing 160,000 compounds is a useful source of novel protein ligands by identifying a non-covalent synthetic ligand to the DNA-binding domain of the p53 transcription factor. The design and synthesis of a family of chiral and conformationally constrained oligomers is described. Asymmetric synthesis of the monomers is presented and the preparation of a 160,000-member library of diverse tetramers via split-and-pool methods is discussed. From this library, a non-covalent ligand to the DNA-binding domain of p53 was discovered.
新化合物的发现用于药理学上调控蛋白质功能,通常涉及对化合物库的筛选,广泛认为天然产物作为蛋白质配体具有有利特点。因此,许多精力集中在“天然产物类似物”库的研究上,但该类库的合成和筛选往往受到以下一项或多项因素的限制:库规模和结构多样性有限,构象异质性,以及与现代高通量筛选中心巨大的基础设施相关的成本。在这里,我们通过结合与生物启发的聚合原理及聚酮类天然产物结构相关的原则,描述了针对这一广泛问题的设计和执行方法。我们描述了一种新型的手性和构象受限的聚合物类别(称为“戊烯酰胺的手性聚合物”,COPA),该类聚合物兼容于分裂与组合的方法,并能够以批量模式进行大规模筛选。我们证明,一个包含160,000个化合物的COPA库是新型蛋白质配体的有用来源,通过识别出一个与p53转录因子DNA结合域的非共价合成配体。文中还描述了一系列手性和构象受限的聚合物的设计和合成,介绍了单体的非对称合成,以及通过分裂与组合方法制备160,000个多样四聚体的库。最终,从这个库中发现了一个与p53的DNA结合域结合的非共价配体。