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首页> 外文期刊>Biological chemistry >The significance of the C(alpha) substituent in the selective inhibition of matrix metalloproteinases 1 and 9.
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The significance of the C(alpha) substituent in the selective inhibition of matrix metalloproteinases 1 and 9.

机译:Cα取代基在选择性抑制基质金属蛋白酶1和9中的意义。

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Matrix metalloproteinases (MMPs) cleave and degrade most components of the extracellular matrix, and unregulated MMP activity has been correlated to cancer and metastasis. Hence there is a burgeoning need to develop inhibitors that bind selectively to structurally similar MMPs. The inhibition profiles of peptidomimetics containing C(alpha) substituents at the alpha,beta unsaturated carbon were evaluated against the recombinant forms of ADAM17, MMP1, and MMP9. The dicarboxylic acid D2 and hydroxamate C2 inhibited MMP9 but not MMP1. The unsaturated compound E2 displayed selective inhibition for MMP1, compared with the saturated precursor C2, with an IC(50) value of 3.91 mum. The molecular basis for this selectivity was further investigated by the molecular docking of E2 and D2 into the active sites of MMP1 and MMP9. These data demonstrate hydrogen-bonding interactions between the carbonyl group of the C(alpha) substituent of E2 and the side chain of Asn180 present in the active site of MMP1. Conversely, the docked MMP9-D2 structure shows hydrophobic and hydrogen bonding between the ligand's morpholine substituent and second carboxylic acid group with Leu187 and an amide, respectively. This study suggests that substituents other than P(1)' and P(2)' may confer selectivity among MMPs and may aid in the search for novel lead compounds.
机译:基质金属蛋白酶(MMP)裂解并降解细胞外基质的大多数成分,并且MMP活性的失调与癌症和转移有关。因此,迫切需要开发与结构相似的MMP选择性结合的抑制剂。针对ADAM17,MMP1和MMP9的重组形式,评估了在α,β不饱和碳原子上包含Cα取代基的拟肽模拟物的抑制特征。二羧酸D2和异羟肟酸酯C2抑制MMP9,但不抑制MMP1。与饱和前体C2相比,不饱和化合物E2对MMP1表现出选择性抑制作用,IC(50)值为3.91微米。通过E2和D2分子对接到MMP1和MMP9的活性位点,进一步研究了这种选择性的分子基础。这些数据证明了E2的Cα取代基的羰基与MMP1活性位点中存在的Asn180侧链之间的氢键相互作用。相反,对接的MMP9-D2结构显示配体的吗啉取代基与第二个羧酸基团分别与Leu187和酰胺形成疏水键和氢键。这项研究表明,除P(1)'和P(2)'以外的取代基可能会赋予MMP选择性,并可能有助于寻找新的先导化合物。

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