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The Proline/Arginine-Rich Domain Is a Major Determinant of Dynamin Self-Activation

机译:脯氨酸/富含精氨酸的域是动力蛋白自我激活的主要决定因素

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摘要

Dynamins induce membrane vesiculation during endocytosis and Golgi budding in a process that requires assembly-dependent GTPase activation. Brain-specific dynamin 1 has a weaker propensity to self-assemble and self-activate than ubiquitously expressed dynamin 2. Here we show that dynamin 3, which has important functions in neuronal synapses, shares the self-assembly and GTPase activation characteristics of dynamin 2. Analysis of dynamin hybrids and of dynamin I dynamin 2 and dynamin 1 dynamin 3 heteropolymers reveals that concentration-dependent GTPase activation is suppressed by the C-terminal proline/arginine-rich domain of dynamin 1. Dynamin proline/arginine-rich domains also mediate interactions with SH3 domain-containing proteins and thus regulate both self-association and heteroassociation of dynamins.
机译:动力蛋白在胞吞作用和高尔基体萌芽过程中诱导膜囊泡形成,该过程需要依赖组装的GTPase活化。大脑特异性的动力蛋白1的自组装和自我激活倾向要比普遍表达的动力蛋白2弱。在这里,我们显示出在神经元突触中具有重要功能的动力蛋白3具有动力蛋白2的自组装和GTPase活化特性。 。dynamin杂种以及dynamin I dynamin 2和dynamin 1 dynamin 3杂聚物的分析显示,浓度依赖性的GTPase激活被dynamin 1的C末端脯氨酸/富含精氨酸的结构域抑制了。Dynamin脯氨酸/富含精氨酸的结构域也介导了与含SH3结构域的蛋白质相互作用,从而调节动力蛋白的自缔合和杂合。

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