SynGAP isoforms exert opposing effects on synaptic strength.
SynGAP isoforms exert opposing effects on synaptic strength.
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DOI:
10.1038/ncomms1900
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发表时间:
2012-06-12
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
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Alternative promoter usage and alternative splicing enable diversification of the transcriptome. Here we demonstrate that the function of Synaptic GTPase-Activating Protein (SynGAP), a key synaptic protein, is determined by the combination of its amino-terminal sequence with its carboxy-terminal sequence. 5′ rapid amplification of cDNA ends and primer extension show that different N-terminal protein sequences arise through alternative promoter usage that are regulated by synaptic activity and postnatal age. Heterogeneity in C-terminal protein sequence arises through alternative splicing. Overexpression of SynGAP α1 versus α2 C-termini-containing proteins in hippocampal neurons has opposing effects on synaptic strength, decreasing and increasing miniature excitatory synaptic currents amplitude/frequency, respectively. The magnitude of this C-terminal-dependent effect is modulated by the N-terminal peptide sequence. This is the first demonstration that activity-dependent alternative promoter usage can change the function of a synaptic protein at excitatory synapses. Furthermore, the direction and degree of synaptic modulation exerted by different protein isoforms from a single gene locus is dependent on the combination of differential promoter usage and alternative splicing. Synaptic GTPase-activating protein, SynGAP, is a postsynaptic signalling protein that can regulate synaptic function. McMahon et al. express different SynGAP isoforms in neurons and find that the effect on synaptic strength depends on alternative promoter usage and alternative splicing of the C-terminus.
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影响因子:
9.8
作者:
Lee, Ji-Ann;Xing, Yi;Nguyen, David;Xie, Jiuyong;Lee, Christopher J;Black, Douglas L
通讯作者:
Black, Douglas L
影响因子:
33.6
作者:
Loebrich S;Nedivi E
通讯作者:
Nedivi E
影响因子:
7.7
作者:
Pena, Vladimir;Hothorn, Michael;Scheffzek, Klaus
通讯作者:
Scheffzek, Klaus
影响因子:
9.9
作者:
Fernandez, Esperanza;Collins, Mark O.;Uren, Rachel T.;Kopanitsa, Maksym V.;Komiyama, Noboru H.;Croning, Mike D. R.;Zografos, Lysimachos;Armstrong, J. Douglas;Choudhary, Jyoti S.;Grant, Seth G. N.
通讯作者:
Grant, Seth G. N.
DOI:
10.1073/pnas.0905570106
发表时间:
2009-07-07
影响因子:
11.1
作者:
Milstein, Aaron D.;Nicoll, Roger A.
通讯作者:
Nicoll, Roger A.