...
首页> 外文期刊>Neuron >Cornichon Proteins Determine the Subunit Composition of Synaptic AMPA Receptors
【24h】

Cornichon Proteins Determine the Subunit Composition of Synaptic AMPA Receptors

机译:角质蛋白确定突触AMPA受体的亚基组成。

获取原文
获取原文并翻译 | 示例
           

摘要

Cornichon-2 and cornichon-3 (CNIH-2/-3) are AMPA receptor (AMPAR) binding proteins that promote receptor trafficking and markedly slow AMPAR deactivation in heterologous cells, but their role in neurons is unclear. Using CNIH-2 and CNIH-3 conditional knockout mice, we find a profound reduction of AMPAR synaptic transmission in the hippocampus. This deficit is due to the selective loss of surface GluA1-containing AMPARs (GluA1A2 heteromers), leaving a small residual pool of synaptic GluA2A3 heteromers. The kinetics of AMPARs in neurons lacking CNIH-2/-3 are faster than those in WT neurons due to the fast kinetics of GluA2A3 heteromers. The remarkably selective effect of CNIHs on the GluA1 subunit is probably mediated by TARP ??-8, which prevents a functional association of CNIHs with non-GluA1 subunits. These results point to a sophisticated interplay between CNIHs and ??-8 that dictates subunit-specific AMPAR trafficking and the strength and kinetics of synaptic AMPAR-mediated transmission. ? 2013 Elsevier Inc.
机译:Cornichon-2和cornichon-3(CNIH-2 / -3)是AMPA受体(AMPAR)结合蛋白,在异源细胞中可促进受体运输并显着减慢AMPAR失活,但它们在神经元中的作用尚不清楚。使用CNIH-2和CNIH-3条件敲除小鼠,我们发现海马AMPAR突触传递大大减少。该缺陷是由于表面含有GluA1的AMPAR(GluA1A2异聚体)的选择性损失所致,留下了少量残留的突触GluA2A3异聚体。由于GluA2A3异聚体的快速动力学,缺少CNIH-2 / -3的神经元中AMPAR的动力学比野生型神经元中的AMPAR更快。 CNIH对GluA1亚基的显着选择性作用可能是由TARPβ-8介导的,它阻止了CNIH与非GluA1亚基的功能结合。这些结果表明,CNIHs与Δβ-8之间的复杂相互作用决定了亚基特异性AMPAR的运输以及突触AMPAR介导的传递的强度和动力学。 ? 2013爱思唯尔公司

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号