GPCR dimers fall apart.

GPCR dimers fall apart.
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GPCR二聚体崩溃了。

DOI:
10.1126/scisignal.3115pe12
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发表时间:
2010-03-30
期刊:
影响因子:
7.3
通讯作者:
Lambert NA
Lambert NA
中科院分区:
生物学1区
文献类型:
--
作者:
Lambert NA

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G蛋白偶联受体(GPCRs),也称为七跨膜受体(7TMR),负责各种感觉和非感觉信号。现在广泛接受的是,这些受体作为同源或异源二聚体或作为更高级的寡聚体彼此缔合。这一认识提出了一些关于GPCR的四级结构和GPCR寡聚体的功能的问题:一个原聚体中的配体结合如何影响相关的原聚体?激活下游信号分子的功能单位是什么?受体的哪些部分形成了原体之间的界面?低聚物在合成到降解的沿着何处形成?他们有没有分离过?直到最近,这最后一个问题很少引起注意,GPCR二聚体和寡聚体通常被认为是稳定的结构。然而,生物物理学研究现在已经开始解决这个问题,答案是新兴的将需要重新评估的稳定二聚体模型。
G protein–coupled receptors (GPCRs), also known as seven-transmembrane receptors (7TMRs), transduce various sensory and nonsensory signals. It is now widely accepted that these receptors associate with each other as homomeric or heteromeric dimers or as higher-order oligomers. This realization raises a number of questions regarding the quaternary structure of GPCRs and the function of GPCR oligomers: How does ligand binding in one protomer affect an associated protomer? What is the functional unit that activates downstream signaling molecules? What parts of the receptor form the interfaces between protomers? Where along the pathway from synthesis to degradation do oligomers form? Do they ever dissociate? Until recently, this last question has attracted little attention, and GPCR dimers and oligomers have generally been considered to be stable structures. However, biophysical studies have now begun to address this question, and the answer that is emerging will require a reassessment of the stable dimer model.
DOI: 10.1021/cr800373w
发表时间: 2009-03-11
期刊: CHEMICAL REVIEWS
影响因子: 62.1
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