We describe the use of comparative structural analysis and structure-guided molecular design to develop potent and selective inhibitors (10d and (S)-17b) of matrix metalloproteinase 13 (MMP-13). We applied a three-step process, starting with a comparative analysis of the X-ray crystallographic structure of compound 5 in complex with MMP-13 with published structures of known MMP-13inhibitor complexes followed by molecular design and synthesis of potent, but non-selective zinc-chelating MMP inhibitors (e.g., 10a and 10b). After demonstrating that the pharmacophores of the chelating inhibitors (S)-10a, (R)-10a, and 10b were binding within the MMP-13 active site, the Zn2+ chelating unit was replaced with non-chelating polar residues that bridged over the Zn2+ binding site and reach into a solvent accessible area. After two rounds of structural optimization, these design approaches led to small molecule MMP-13 inhibitors 10d and (S)-17b which bind within the substrate-binding site of MMP-13 and surround the catalytically active Zn2+ ion without chelating to the metal. These compounds exhibit at least 500-fold selectivity versus other MMPs.
我们描述了比较结构分析和结构引导的分子设计的使用,以开发针对基质
金属
蛋白酶13(MMP-13)的有效且选择性
抑制剂(10d和(S)-17b)。我们应用了一个三步过程,首先是对化合物5与MMP-13复合物的X射线晶体结构进行比较分析,然后与已知的MMP-13
抑制剂复合物的已发表结构进行比较,接着进行分子设计和合成有效但非选择性的
锌螯合MMP
抑制剂(例如10a和10b)。在证明了螯合
抑制剂(S)-10a、(R)-10a和10b的药效团结合在MMP-13活性位点内后,Zn2+螯合单元被替换为桥接到Zn2+结合位点并伸入溶剂可接触区域的非螯合极性残基。经过两轮结构优化,这些设计方法导致小分子MMP-13
抑制剂10d和(S)-17b,它们结合在MMP-13的底物结合位点,并围绕着催化活性的Zn2+离子,而不与
金属螯合。这些化合物与其他MMP至少具有500倍的选择性。