期刊
EUROPEAN JOURNAL OF NEUROSCIENCE
卷 12, 期 10, 页码 3605-3614出版社
BLACKWELL SCIENCE LTD
DOI: 10.1046/j.1460-9568.2000.00256.x
关键词
AMPA receptors; GluR1; immunocytochemistry; PDZ; rat; scaffolding proteins
资金
- NINDS NIH HHS [NS29879, NS35563, NS35527] Funding Source: Medline
SAP97, a PDZ-containing protein, is reported to concentrate in axon terminals, where its function remains unknown. Using highly specific new antibodies, we show that SAP97 in rat cerebral cortex is associated with heteromeric AMPA receptors via a selective biochemical interaction between SAP97 and the GluR1 subunit. Using light and electron microscopic immunocytochemistry, we demonstrate cellular and synaptic colocalization of SAP97 and GluR1, and show that SAP97 concentrates at synapses that contain GluR1 but not necessarily GluR2 or GluR3. Using quantitative postembedding immunogold electron microscopy, we find that SAP97 is at highest concentration within the postsynaptic density of asymmetric synapses. These data suggest that SAP97 may help to anchor GluR1-containing AMPA receptors at the synapse. As a multifunctional scaffolding protein, SAP97 may organize components of AMPA-related intracellular signalling pathways, including those associated with calcium-permeable homomeric GluR1 channels.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据