Novel Selective Inhibitors of the Interaction of Individual Nuclear Hormone Receptors with a Mutually Shared Steroid Receptor Coactivator 2
作者:Timothy R. Geistlinger、R. Kiplin Guy
DOI:10.1021/ja0348391
日期:2003.6.1
Nuclear hormone receptor (NR) signaling, currently a therapeutic target in multiple diseases, involves an ordered series of protein interactions to regulate transcription in response to changing hormone levels. Later steps in the process of ligand-dependent signaling are driven by a highly conserved interaction between the NRs and the steroid receptor coactivators (SRCs) that is effected by a conserved interaction motif (L1XXL2L3), known as an NR box. Using computational design and combinatorial chemistry, we have produced novel alpha-helical proteomimetics of the second NR box of SRC2 that exploit structural differences between human estrogen receptor alpha (hERalpha), human estrogen receptor beta (hERbeta), and human thyroid hormone receptor beta (hTRbeta). The resulting library sequentially replaced each leucine with non-natural side chains. Screening this library using a quantitative competition assay revealed compounds that selectively inhibit the interaction of SRC2-2 with each individual NR in preference to its interaction with the other NR. This approach generated highly selective compounds from one that had no specificity for a particular family member. These compounds represent the first family-member-selective competitive inhibitors of the protein interactions of transcription factors.
Solid phase β-lactams synthesis using the Staudinger reaction, monitored by 19F NMR spectroscopy
作者:Isabelle Le Roy、Dominique Mouysset、Serge Mignani、Marc Vuilhorgne、Lucien Stella
DOI:10.1016/s0040-4020(03)00553-2
日期:2003.5
We report the use of 19FNMR as a simple means to monitorreactions on a solid phase. Multi-step sequences including protection, coupling, deprotection, condensation, cycloaddition and cleavage steps are described in the case of multicomponent reactions involving fluorinated α-aminoesters, aldehydes and acid chlorides.
我们报告了使用19 F NMR作为监测固相反应的简单方法。在涉及氟化α-氨基酯,醛和酰氯的多组分反应的情况下,描述了包括保护,偶联,脱保护,缩合,环加成和裂解步骤在内的多步骤序列。