DPL-1 (DP) acts in the germ line to coordinate ovulation and fertilization in C. elegans.
DPL-1 (DP) acts in the germ line to coordinate ovulation and fertilization in C. elegans.
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DPL-1(DP)在种植线上起作用,以协调秀丽隐杆线虫的排卵和施肥。
DOI:
10.1016/j.mod.2009.01.008
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发表时间:
2009-05
影响因子:
2.6
通讯作者:
Reinke, Valerie
中科院分区:
文献类型:
--
作者:
Chi, Woo;Reinke, Valerie
Proper coordination of oogenesis, ovulation, and fertilization is essential for successful reproduction. In C. elegans, a strong loss-of-function mutation in dpl-1, which encodes a subunit of the E2F heterodimeric transcription factor EFL-1/DPL-1, causes severe defects during ovulation and fertilization. Here we demonstrate that the somatic gonad structure and sheath cell contraction rate appear normal in dpl-1 mutants, but that dilation of the spermatheca valve does not occur properly, causing oocytes to become trapped in the proximal gonad arm and enter endomitosis. This ovulation defect can be partially suppressed by increasing the activity of ITR-1, an inositol triphosphate receptor in the spermatheca that promotes dilation in response to IP3 signaling. Tissue-specific rescue experiments demonstrate that expression of DPL-1 in germ cells but not the spermatheca can restore both ovulation and fertilization in dpl-1 mutants, indicating that the absence of DPL-1 likely disrupts a pro-ovulation signal originating in the oocyte that in turn stimulates the spermatheca. Moreover, we found that expression of a single EFL-1/DPL-1-responsive gene, rme-2, in the germ line of dpl-1 mutants significantly rescues ovulation, but not fertilization. Instead, other EFL-1/DPL-1-responsive genes function to promote successful fertilization. We propose that DPL-1 acts with EFL-1 in developing oocytes to directly regulate a transcriptional program that couples the critical events of ovulation and fertilization.
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影响因子:
9.2
作者:
Maruyama, Rika;Velarde, Nathalie V.;Singson, Andrew
通讯作者:
Singson, Andrew
DOI:
10.1242/dev.02490
发表时间:
2006-08-01
期刊:
Development (Cambridge, England)
影响因子:
--
作者:
Chi, Woo;Reinke, Valerie
通讯作者:
Reinke, Valerie
影响因子:
21.3
作者:
Kubagawa, Homare M.;Watts, Jennifer L.;Miller, Michael A.
通讯作者:
Miller, Michael A.
影响因子:
16
作者:
Ceol, CJ;Horvitz, HR
通讯作者:
Horvitz, HR
影响因子:
56.9
作者:
Miller, MA;Nguyen, VQ;Greenstein, D
通讯作者:
Greenstein, D