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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Dopamine receptor D_3 regulates endocytic sorting by a Prazosin-sensitive interaction with the coatomer COPI
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Dopamine receptor D_3 regulates endocytic sorting by a Prazosin-sensitive interaction with the coatomer COPI

机译:多巴胺受体D_3通过Prazosin敏感与涂层COPI相互作用来调节内吞分选

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摘要

Macromolecules enter cells by endocytosis and are sorted to different cellular destinations in early/sorting endosomes. The mechanism and regulation of sorting are poorly understood, although transitions between vesicular and tubular endosomes are important. We found that the antihypertensive drug Prazosin inhibits endocytic sorting by an off-target perturbation of the G protein-coupled receptor dopamine receptor D_3 (DRD3). Prazosin is also a potent cytokinesis inhibitor, likely as a consequence of its effects on endosomes. Prazosin stabilizes a normally transient interaction between DRD3 and the coatomer COPI, a complex involved in membrane transport, and shifts endosomal morphology entirely to tubules, disrupting cargo sorting. RNAi depletion of DRD3 alone also inhibits endocytic sorting, indicating a noncanonical role for a G protein-coupled receptor. Prazosin is a powerful tool for rapid and reversible perturbation of endocytic dynamics.
机译:大分子通过胞吞作用进入细胞,并在早期/分选的内体中分选到不同的细胞目的地。尽管水泡和管状内体之间的过渡很重要,但对分类的机理和调节却知之甚少。我们发现降压药Prazosin通过脱靶性扰动G蛋白偶联受体多巴胺受体D_3(DRD3)抑制内吞分选。 Prazosin还是一种有效的胞质分裂抑制剂,可能是由于其对内体的影响。吡唑嗪可稳定DRD3与涂层蛋白COPI(参与膜运输的复合物)之间的正常瞬态相互作用,并使内体形态完全转变为小管,从而破坏了货物的分类。单独的DRD3的RNAi消耗也抑制内吞分选,表明G蛋白偶联受体的非典型作用。吡唑嗪是用于快速和可逆地扰动内吞动力学的强大工具。

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