Growth factor and co-receptor release by structural regulation of substrate metalloprotease accessibility.

Growth factor and co-receptor release by structural regulation of substrate metalloprotease accessibility.
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DOI:
10.1038/srep37464
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发表时间:
2016-11-23
期刊:
影响因子:
4.6
通讯作者:
Herrlich A
Herrlich A
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Parra LM;Hartmann M;Schubach S;Ma J;Herrlich P;Herrlich A

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细胞因子、生长因子和其他生命必需分子通过α-去整合素和金属蛋白酶(亚当斯)从前体的释放受到高底物特异性的调节。我们假设这是通过前体的裂解调节胞内结构域(ICD)修饰实现的。我们在这里表明,裂解刺激诱导的特定ICD修饰引起结构底物的变化,增强胞外域敏感性的神经调节蛋白-1(NRG 1;表皮生长因子)或CD 44(受体酪氨酸激酶(RTK)共受体)胰凝乳蛋白酶/胰蛋白酶或可溶性ADAM。这种由内而外的信号传递需要底物同源二聚化,并通过切割抑制性ICD突变来阻止。在嵌合体中,调控可以赋予一个外来的胞外域,这表明一个共同的高阶结构。我们预测,底物特异性蛋白酶可及性调节控制释放的许多ADAM底物。
Release of cytokines, growth factors and other life-essential molecules from precursors by a-disintegrin-and-metalloproteases (ADAMs) is regulated with high substrate-specificity. We hypothesized that this is achieved by cleavage-regulatory intracellular-domain (ICD)-modifications of the precursors. We show here that cleavage-stimuli-induced specific ICD-modifications cause structural substrate changes that enhance ectodomain sensitivity of neuregulin-1 (NRG1; epidermal-growth-factor) or CD44 (receptor-tyrosine-kinase (RTK) co-receptor) to chymotrypsin/trypsin or soluble ADAM. This inside-out signal transfer required substrate homodimerization and was prevented by cleavage-inhibitory ICD-mutations. In chimeras, regulation could be conferred to a foreign ectodomain, suggesting a common higher-order structure. We predict that substrate-specific protease-accessibility-regulation controls release of numerous ADAM substrates.
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