Role of CGRP-receptor component protein (RCP) in CLR/RAMP function.

Role of CGRP-receptor component protein (RCP) in CLR/RAMP function.
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DOI:
10.2174/13892037113149990057
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发表时间:
2013-08
影响因子:
2.8
通讯作者:
Dickerson IM
Dickerson IM
中科院分区:
生物学3区
文献类型:
--
作者:
Dickerson IM

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降钙素基因相关肽(CGRP)和肾上腺髓质素(AM)的受体需要一种名为CGRP受体成分蛋白(RCP)的细胞内外周膜蛋白来传递信号。RCP是CGRP和AM受体信号传递所必需的,最近发现RCP通过直接与受体结合来实现信号传递。RCP存在于大多数永生化细胞系中,但在体内RCP的表达仅限于特定的细胞亚群,通常与含有cgrp的神经元共定位。RCP蛋白的表达与体内CGRP的作用相关,表明RCP在体内调控CGRP信号传导,就像在细胞培养中一样。RCP通常存在于细胞质或细胞膜中,但最近在神经元细胞核中也发现了RCP,这表明RCP在细胞功能中的转录作用。总之,这些数据支持RCP在CGRP和AM受体功能中的重要作用,其中RCP表达增强CGRP或AM受体的信号传导,从而提高CGRP和AM在体内的功效。
The receptor for calcitonin gene-related peptide (CGRP) and adrenomedullin (AM) requires an intracellular peripheral membrane protein named CGRP-receptor component protein (RCP) for signaling. RCP is required for CGRP and AM receptor signaling, and it has recently been discovered that RCP enables signaling by binding directly to the receptor. RCP is present in most immortalized cell lines, but in vivo RCP expression is limited to specific subsets of cells, usually co-localizing with CGRP-containing neurons. RCP protein expression correlates with CGRP efficacy in vivo, suggesting that RCP regulates CGRP signaling in vivo as it does in cell culture. RCP is usually identified in cytoplasm or membranes of cells, but recently has been observed in nucleus of neurons, suggesting an additional transcriptional role for RCP in cell function. Together, these data support an essential role for RCP in CGRP and AM receptor function, in which RCP expression enhances signaling of the CGRP or AM receptor, and therefore increases the efficacy of CGRP and AM in vivo.
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