Abstract：
:Neuronal development, plasticity and survival require activity-dependent synapse-to-nucleus signaling. Most studies implicate an activity-dependent regulation of gene expression in this phenomenon. However, little is known about other nuclear functions that are regulated by synaptic activity. Here we show that a newly identified component of rat postsynaptic densities (PSDs), AIDA-1d, can regulate global protein synthesis by altering nucleolar numbers. AIDA-1d binds to the first two postsynaptic density-95/Discs large/zona occludens-1 (PDZ) domains of the scaffolding protein PSD-95 via its C-terminal three amino acids. Stimulation of NMDA receptors (NMDARs), which are also bound to PSD-95, results in a Ca2+-independent translocation of AIDA-1d to the nucleus, where it couples to Cajal bodies and induces Cajal body-nucleolar association. Long-term neuronal stimulation results in an AIDA-1-dependent increase in nucleolar numbers and protein synthesis. We propose that AIDA-1d mediates a link between synaptic activity and control of protein biosynthetic capacity by regulating nucleolar assembly.
journal_name
Nat Neuroscijournal_title
Nature neuroscienceauthors
Jordan BA,Fernholz BD,Khatri L,Ziff EBdoi
10.1038/nn1867subject
Has Abstractpub_date
2007-04-01 00:00:00pages
427-35issue
4eissn
1097-6256issn
1546-1726pii
nn1867journal_volume
10pub_type
杂志文章abstract：:In the version of this article initially published, the annotation accompanying ref. 47 ended with "though the modulation of microglia." The first word of this phrase should have been "through." The error has been corrected in the HTML and PDF versions of the article. ...
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