Abstract

A large library of saccharin and acesulfame derivatives has been synthesised and evaluated against four isoforms of human carbonic anhydrase, the two off-targets hCA I/II and the tumour related isoforms hCA IX/XII. Different strategies of scaffold modification have been attempted on both saccharin as well as acesulfame core leading to the obtainment of 60 compounds. Some of them exhibited inhibitory activity in the nanomolar range, albeit some of the performed changes led to either micromolar activity or to its absence, against hCA IX/XII. Molecular modelling studies focused the attention on the binding mode of these compounds to the enzyme. The proposed inhibition mechanism is the anchoring to zinc-bound water molecule. Docking studies along with molecular dynamics also underlined the importance of the compounds flexibility (e.g. achieved through the insertion of methylene group) which favoured potent and selective hCA inhibition.

摘要

已经合成了糖精和乙酰磺胺酸衍生物的大型文库，并针对人碳酸酐酶的四种同工型，两种脱靶的hCA I / II和与肿瘤相关的同工型hCA IX / XII进行了评估。糖精和乙酰磺胺酸核心都尝试了不同的支架修饰策略，从而获得了60种化合物。它们中的一些表现出在纳摩尔范围内的抑制活性，尽管某些进行的改变导致针对hCA IX / XII的微摩尔活性或不存在。分子模型研究将注意力集中在这些化合物与酶的结合方式上。拟议的抑制机制是锚定在锌结合的水分子上。对接研究以及分子动力学也强调了化合物灵活性的重要性（例如，