Phosphorylation-dependent regulation of N-methyl-D-aspartate receptors by calmodulin

Chihiro Hisatsune, Hisashi Umemori, Takafumi Inoue, Takayuki Michikawa, Kazuhisa Kohda, Katsuhiko Mikoshiba, Tadashi Yamamoto*


研究成果: Article査読

112 被引用数 (Scopus)


The N-methyl-D-aspartate (NMDA) receptor plays important roles in synaptic plasticity and brain development. The NMDA receptor subunits have large intracellular domains in the COOH-terminal region that may interact with signal-transducing proteins. By using the yeast two-hybrid system, we found that calmodulin interacts with the COOH terminus of the NR1 subunit and inactivates the channels in a Ca2+-dependent manner. Here we show that protein kinase C (PKC)-mediated phosphorylation on serine residues of NR1 decreases its affinity for calmodulin. This suggests that PKC-mediated phosphorylation of NR1 prevents calmodulin from binding to the NR1 subunit and thereby inhibits the inactivation of NMDA receptors by calmodulin. In addition, we show that stimulation of metabotropic glutamate receptor 1α, which potentiates NMDA channels through PKC, decreases the ability of NR1 to bind to calmodulin. Thus, our data provide clues to understanding the basis of cross-talk between two types of receptors, metabotropic glutamate receptors and the NR1 subunit, in NMDA channel potentiation.

ジャーナルJournal of Biological Chemistry
出版ステータスPublished - 1997 8月 15

ASJC Scopus subject areas

  • 生化学
  • 分子生物学
  • 細胞生物学


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