TRP trapped in fly signaling web

被引:87
作者
Montell, C
机构
[1] Johns Hopkins Sch Med, Dept Biol Chem, Baltimore, MD 21205 USA
[2] Johns Hopkins Sch Med, Dept Neurosci, Baltimore, MD 21205 USA
关键词
D O I
10.1016/S0959-4388(98)80066-4
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
In the Drosophila eye, photoactivation of rhodopsin leads to the opening of the light-sensitive cation influx channels TRP and TRPL. This response is extremely rapid and results in depolarization of the photoreceptor cells followed by Ca2+-mediated feedback regulation of the visual signaling cascade, The mechanisms that facilitate the rapid kinetics of activation and feedback regulation are poorly understood. However, the recent discovery that most of the proteins that function in fly phototransduction associate into a supramolecular complex permits a re-evaluation of the mechanisms underlying the activation and regulation of the cascade. The central player in the signaling complex is INAD, a protein with five protein-interaction motifs known as PDZ domains. The INAD complex does not appear to be a particle, but a massive signaling web composed of an INAD polymer with which some of the target proteins associate through complex multivalent interactions.
引用
收藏
页码:389 / 397
页数:9
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