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首页> 外文期刊>Cell and Tissue Research >Contrasting expression of membrane metalloproteinases, MT1-MMP and MT3-MMP, suggests distinct functions in skeletal development
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Contrasting expression of membrane metalloproteinases, MT1-MMP and MT3-MMP, suggests distinct functions in skeletal development

机译:膜金属蛋白酶MT1-MMP和MT3-MMP的相反表达表明骨骼发育中的不同功能

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Membrane-type 1 matrix metalloproteinase (MT1-MMP) is the most ubiquitous and widely studied of the membrane-type metalloproteinases (MT-MMPs). It was thus surprising to find no published data on chicken MT1-MMP. We report here the characterization of the chicken gene. Its low sequence identity with the MT1-MMP genes of other species, high GC content, and divergent catalytic domain explains the absence of data and our difficulties in characterizing the gene. The absence of structural features in the chicken gene that have been suggested to be critical for the activation of MMP-2 by MT1-MMP; for the effect of MT1-MMP on cell migration and for the recycling of MT1-MMP suggest these features are either not essential or that MT1-MMP does not perform these functions in chickens. Comparison of the expression of chicken MT1-MMP with MT3-MMP and with MMP-2 and MMP-13 has confirmed the previously recognized co-expression of MT1-MMP with MMP-2 and MMP-13 in fibrous and vascular tissues, particularly those surrounding the developing long bones in other species. By contrast, MT3-MMP expression differs markedly from that of MT1-MMP and of both MMP-2 and MMP-13. MT3-MMP is expressed by chondrocytes of the developing articular surface. Similar expression patterns of this group of MT-MMPs and MMPs have been observed in mouse embryos and suggest distinct and specific functions for MT1-MMP and MT3-MMP in skeletal development.
机译:膜型1基质金属蛋白酶(MT1-MMP)是膜型金属蛋白酶(MT-MMP)中应用最广泛和广泛的研究。因此,令人惊讶的是没有找到有关鸡MT1-MMP的公开数据。我们在这里报告鸡基因的表征。它与其他物种的MT1-MMP基因具有较低的序列同一性,较高的GC含量和不同的催化结构域,这说明缺乏数据以及我们难以表征该基因。已经表明,鸡基因中缺乏结构特征对于MT1-MMP激活MMP-2至关重要。对于MT1-MMP对细胞迁移的影响以及MT1-MMP的回收,建议这些功能不是必需的,或者MT1-MMP在鸡中不具有这些功能。比较鸡MT1-MMP与MT3-MMP以及与MMP-2和MMP-13的表达,证实了先前公认的MT1-MMP与MMP-2和MMP-13在纤维和血管组织中的共表达围绕其他物种正在发育的长骨。相反,MT3-MMP的表达与MT1-MMP以及MMP-2和MMP-13的表达明显不同。 MT3-MMP由发育中的关节表面的软骨细胞表达。已经在小鼠胚胎中观察到了这组MT-MMP和MMP的相似表达模式,并暗示了MT1-MMP和MT3-MMP在骨骼发育中的独特功能。

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