The role of cholesterol on the activity and stability of neurotensin receptor 1.

The role of cholesterol on the activity and stability of neurotensin receptor 1.
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胆固醇对神经降压素受体活性和稳定性的作用1。

DOI:
10.1016/j.bbamem.2012.04.010
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发表时间:
2012
期刊:
Biochimica et biophysica acta
影响因子:
--
通讯作者:
Oates J
Oates J
中科院分区:
--
文献类型:
--
作者:
Oates J

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了解特定的双层成分在控制G蛋白偶联受体(GPCRs)功能中的作用将是开发新药物的关键因素。尤其是由于β-2肾上腺素能受体的2.6o晶体结构揭示了一个假定的胆固醇结合基序,该基序在整个A类GPCRs中保守,因此胆固醇依赖已成为GPCRs功能方面的一个重要研究领域。此外,实验证据表明,胆固醇依赖的GPCR功能已在有限的情况下被证明。这种受体功能的调节既可以归因于胆固醇与受体的直接相互作用,也可以归因于胆固醇对双层有序性和侧向压力的影响所引起的间接作用。尽管胆固醇结合基序广泛存在,但目前有关胆固醇参与GPCRs功能的实验数据仅限于少数受体。在这里,我们研究了胆固醇在神经降压素受体1(NTS1)A类gpr功能中的作用。具体地说,我们展示了胆固醇和类似的胆固醇琥珀酸半酯如何影响纯化和重组的NTS1的活性、稳定性和寡聚。研究结果告诫不要将这些基序用作胆固醇依赖的gpr活性的指示器。
Understanding the role of specific bilayer components in controlling the function of G-protein coupled receptors (GPCRs) will be a key factor in the development of novel pharmaceuticals. Cholesterol-dependence in particular has become an area of keen interest with respect to GPCR function; not least since the 2.6Å crystal structure of the β2 adrenergic receptor revealed a putative cholesterol binding motif conserved throughout class-A GPCRs. Furthermore, experimental evidence for cholesterol-dependent GPCR function has been demonstrated in a limited number of cases. This modulation of receptor function has been attributed to both direct interactions between cholesterol and receptor, and indirect effects caused by the influence of cholesterol on bilayer order and lateral pressure. Despite the widespread occurrence of cholesterol binding motifs, available experimental data on the functional involvement of cholesterol on GPCRs are currently limited to a small number of receptors. Here we investigate the role of cholesterol in the function of the neurotensin receptor 1 (NTS1) a class‐A GPCR. Specifically we show how cholesterol, and the analogue cholesteryl hemisuccinate, influence activity, stability, and oligomerisation of both purified and reconstituted NTS1. The results caution against using such motifs as indicators of cholesterol‐dependent GPCR activity.
通过胆固醇诱导的双层脂质排序调节变视紫红质的形成。
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