Stoichiometry of the murine gammadelta T cell receptor.

Stoichiometry of the murine gammadelta T cell receptor.
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DOI:
10.1084/jem.20051886
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发表时间:
2006-01-23
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Love PE
Love PE
中科院分区:
其他
文献类型:
--
作者:
Hayes SM;Love PE

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T细胞抗原受体(TCR)复合物被组织成两个功能域:抗原结合克隆型异二聚体和信号转导不变性CD3和TCRζ链。在大多数脊椎动物中,有两种不同的克隆型异源二聚体(TCRαβ和TCRγδ)分别定义αβ和γδ T细胞系。αβ-和γδTCRs的不变链亚基组成也不同,αβ- tcrs含有CD3γ α和CD3δ α二聚体,而γδTCRs仅含有CD3γ α二聚体。αβ-和γδTCRs亚基组成的差异提出了这些受体复合物的化学计量是否不同的问题。由于小鼠γδTCR的化学计量学尚未被研究过,我们使用了两种定量免疫荧光方法来确定小鼠γδTCR表面复合物中TCRγδ异源二聚体和CD3γ α二聚体的价态。我们的结果支持小鼠γδTCR化学计量学模型,其中每个TCRγδ异源二聚体有两个CD3γ α二聚体。
The T cell receptor for antigen (TCR) complex is organized into two functional domains: the antigen-binding clonotypic heterodimer and the signal-transducing invariant CD3 and TCRζ chains. In most vertebrates, there are two different clonotypic heterodimers (TCRαβ and TCRγδ) that define the αβ and γδ T cell lineages, respectively. αβ- and γδTCRs also differ in their invariant chain subunit composition, in that αβTCRs contain CD3γɛ and CD3δɛ dimers, whereas γδTCRs contain only CD3γɛ dimers. This difference in subunit composition of the αβ- and γδTCRs raises the question of whether the stoichiometries of these receptor complexes are different. As the stoichiometry of the murine γδTCR has not been previously investigated, we used two quantitative immunofluorescent approaches to determine the valency of TCRγδ heterodimers and CD3γɛ dimers in surface murine γδTCR complexes. Our results support a model of murine γδTCR stoichiometry in which there are two CD3γɛ dimers for every TCRγδ heterodimer.
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