PDZ domain suppression of an ER retention signal in NMDA receptor NR1 splice variants

被引：289

作者：

Standley, S ^{[1
]}

Roche, KW ^{[1
]}

McCallum, J ^{[1
]}

Sans, N ^{[1
]}

Wenthold, RJ ^{[1
]}

机构：

[1] Natl Inst Deafness & Commun Disorders, Neurochem Lab, NIH, Bethesda, MD 20892 USA

来源：

NEURON | 2000年 / 28卷 / 03期

关键词：

D O I：

10.1016/S0896-6273(00)00161-6

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

The NMDA receptor NR1 subunit has four splice variants that differ in their C-terminal, cytoplasmic domain. We investigated the contribution of the C-terminal cassettes, CO, C1, C2, and C2', to trafficking of NR1 in heterologous cells and neurons. We identified an ER retention signal (RRR) in the C1 cassette of NR1, which is similar to the RXR motif in ATP-sensitive K+ channels (Zerangue et al., 1999). We found that surface expression of NR1-3, which contains C1, is due to a site on the C2' cassette, which includes the terminal 4 amino acid PDZ-interacting domain. This site suppresses ER retention of the C1 cassette and leads to surface expression. These findings suggest a role for PDZ proteins in facilitating the transition of receptors from an intracellular pool to the surface of the neuron.

引用

页码：887 / 898

页数：12