Discovery of Small-Molecule Interleukin-2 Inhibitors from a DNA-Encoded Chemical Library
摘要:
AbstractLibraries of chemical compounds individually coupled to encoding DNA tags (DNA‐encoded chemical libraries) hold promise to facilitate exceptionally efficient ligand discovery. We constructed a high‐quality DNA‐encoded chemical library comprising 30 000 drug‐like compounds; this was screened in 170 different affinity capture experiments. High‐throughput sequencing allowed the evaluation of 120 million DNA codes for a systematic analysis of selection strategies and statistically robust identification of binding molecules. Selections performed against the tumor‐associated antigen carbonic anhydrase IX (CA IX) and the pro‐inflammatory cytokine interleukin‐2 (IL‐2) yielded potent inhibitors with exquisite target specificity. The binding mode of the revealed pharmacophore against IL‐2 was confirmed by molecular docking. Our findings suggest that DNA‐encoded chemical libraries allow the facile identification of drug‐like ligands principally to any protein of choice, including molecules capable of disrupting high‐affinity protein–protein interactions.
Functionalization of Sulfonamide-Containing Peptides through Late-Stage Palladium-Catalyzed C(sp<sup>3</sup>)–H Arylation
作者:Qingqing Bai、Jian Tang、Huan Wang
DOI:10.1021/acs.orglett.9b01953
日期:2019.8.2
Bioactive peptides are emerging as promising candidates of clinic therapeutics. Here, we report a method for late-stage functionalization of sulfonamide-containing peptides through Pd-catalyzed C(sp3)–H arylation. In this protocol, the backbones of N-sulfonated peptides act as directing groups, which allows site-specific arylation of benzylsulfonamide moiety. This chemistry exhibits broad substrate