Abstract：
:Cyclin E is a component of the core cell cycle machinery, and it drives cell proliferation by regulating entry and progression of cells through the DNA synthesis phase. Cyclin E expression is normally restricted to proliferating cells. However, high levels of cyclin E are expressed in the adult brain. The function of cyclin E in quiescent, postmitotic nervous system remains unknown. Here we use a combination of in vivo quantitative proteomics and analyses of cyclin E knockout mice to demonstrate that in terminally differentiated neurons cyclin E forms complexes with Cdk5 and controls synapse function by restraining Cdk5 activity. Ablation of cyclin E led to a decreased number of synapses, reduced number and volume of dendritic spines, and resulted in impaired synaptic plasticity and memory formation in cyclin E-deficient animals. These results reveal a cell cycle-independent role for a core cell cycle protein, cyclin E, in synapse function and memory.
journal_name
Dev Celljournal_title
Developmental cellauthors
Odajima J,Wills ZP,Ndassa YM,Terunuma M,Kretschmannova K,Deeb TZ,Geng Y,Gawrzak S,Quadros IM,Newman J,Das M,Jecrois ME,Yu Q,Li N,Bienvenu F,Moss SJ,Greenberg ME,Marto JA,Sicinski Pdoi
10.1016/j.devcel.2011.08.009subject
Has Abstractpub_date
2011-10-18 00:00:00pages
655-68issue
4eissn
1534-5807issn
1878-1551pii
S1534-5807(11)00347-9journal_volume
21pub_type
杂志文章abstract：:Caspase proteases execute apoptosis but also function in development. In this issue of Developmental Cell, Weaver et al. report that C. elegans CED-3 caspase promotes animal growth through PMK-1/p38 kinase cleavage, and at the expense of pathogen and stress immunity, revealing an unexpected homeostatic relationship be...
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journal_title：Developmental cell
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journal_title：Developmental cell
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journal_title：Developmental cell
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journal_title：Developmental cell
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