Dosage effects of a Drosophila sodium channel gene on behavior and axonal excitability.
Dosage effects of a Drosophila sodium channel gene on behavior and axonal excitability.
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果蝇钠通道基因对行为和轴突兴奋性的剂量影响。
DOI:
10.1093/genetics/124.1.133
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发表时间:
1990
期刊:
影响因子:
3.3
通讯作者:
Ganetzky,B
中科院分区:
文献类型:
--
作者:
Stern,M;Kreber,R;Ganetzky,B
The effects of para mutations on behavior and axonal excitability in Drosophila suggested that para specifically affects sodium channels. This hypothesis was confirmed by molecular analysis of the para locus, which demonstrates that the encoded para product is a sodium channel polypeptide. Here we characterize the effects of altered para+ dosage on behavior and axonal excitability, both in an otherwise wild-type background and in combination with two other mutations: napts, which also affects sodium channels, and ShKS133, which specifically affects potassium channels. Whereas it was previously shown that decreased dosage of para+ is unconditionally lethal in a napts background, we find that increased dosage of para+ suppresses napts. Similarly, we find that para hypomorphs or decreased dosage of para+ suppresses ShKS133, whereas increased dosage of para+ enhances ShKS133). The electrophysiological basis for these effects is investigated. Other genes in Drosophila that have sequence homology to sodium channels do not show such dosage effects, which suggests that the para+ product has a function distinct from that of other putative Drosophila sodium channel genes. We conclude that the number of sodium channels present in at least some Drosophila neurons can be affected by changes in para+ gene dosage, and that the level of para+ expression can strongly influence neuronal excitability.
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影响因子:
3.7
作者:
L. Gnessi;M. Ruff;F. Fraioli;C. Pert
通讯作者:
C. Pert
DOI:
10.1016/s0021-9258(17)33330-6
发表时间:
1976
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
D. Babcock;N. First;H. Lardy
通讯作者:
H. Lardy
DOI:
10.1016/s0021-9258(18)32420-7
发表时间:
1983-05
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
D. Babcock
通讯作者:
D. Babcock
DOI:
10.1073/pnas.76.11.5699
发表时间:
1979
影响因子:
11.1
作者:
R. Hyne;D. Garbers
通讯作者:
D. Garbers
DOI:
--
发表时间:
1985
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Lee,HC
通讯作者:
Lee,HC