Cell Type-Specific Tandem Affinity Purification of the Mouse Hippocampal CB1 Receptor-Associated Proteome.

Cell Type-Specific Tandem Affinity Purification of the Mouse Hippocampal CB1 Receptor-Associated Proteome.
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小鼠海马 CB1 受体相关蛋白质组的细胞类型特异性串联亲和纯化

DOI:
10.1021/acs.jproteome.6b00339
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发表时间:
2016
影响因子:
4.4
通讯作者:
Lutz B
Lutz B
中科院分区:
生物学2区
文献类型:
--
作者:
Mattheus T;Kukla K;Zimmermann T;Tenzer S;Lutz B

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G 蛋白偶联受体 (GPCR) 通过多蛋白信号复合物发挥作用。 1 型大麻素受体 (CB1) 是哺乳动物大脑中最丰富的 GPCR 之一,参与多种生理功能。我们将病毒介导的标记 CB1 融合蛋白 (CB1-SF) 的细胞类型特异性表达、串联亲和纯化 (TAP) 和小鼠海马组织蛋白质组学相结合,分析谷氨酸能神经元和 GABA 能中间神经元中 CB1 蛋白复合物的组成和差异。纯化的蛋白质经过胰蛋白酶消化,并使用离子淌度分离增强质谱的深度覆盖数据独立采集进行鉴定,从而鉴定出与对照相比在谷氨酸能和 GABA 能 CB1-SF TAP 样品中特异性富集的 951 种蛋白质。基因本体论和蛋白质网络分析显示,涉及已经充分描述的 CB1 功能域的单个蛋白质和蛋白质功能簇的富集。在这个一致的数据集的支持下,我们可以确认已知的 CB1 相互作用蛋白,揭示新的潜在相互作用蛋白以及 CB1 细胞类型特异性信号传导特性的差异,从而为差异 CB1 信号传导的进一步功能研究奠定基础。
G protein coupled receptors (GPCRs) exert their effects through multiprotein signaling complexes. The cannabinoid receptor type 1 (CB1) is among the most abundant GPCRs in the mammalian brain and involved in a plethora of physiological functions. We used a combination of viral-mediated cell type-specific expression of a tagged CB1 fusion protein (CB1-SF), tandem affinity purification (TAP) and proteomics on hippocampal mouse tissue to analyze the composition and differences of CB1 protein complexes in glutamatergic neurons and in GABAergic interneurons. Purified proteins underwent tryptic digestion and were identified using deep-coverage data-independent acquisition with ion mobility separation-enhanced mass spectroscopy, leading to the identification of 951 proteins specifically enriched in glutamatergic and GABAergic CB1-SF TAP samples as compared to controls. Gene Ontology and protein network analyses showed an enrichment of single proteins and functional clusters of proteins involved in already well described domains of CB1 functions. Supported by this consistent data set we could confirm already known CB1 interactors, reveal new potentially interacting proteins and differences in cell type-specific signaling properties of CB1, thereby providing the foundation for further functional studies on differential CB1 signaling.
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发表时间: 2016-05-01
影响因子: 3.1
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发表时间: 2013
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