Number of Nuclear Divisions in the Drosophila Blastoderm Controlled by Onset of Zygotic Transcription
Number of Nuclear Divisions in the Drosophila Blastoderm Controlled by Onset of Zygotic Transcription
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果蝇胚盘中核分裂的数量受合子转录起始的控制
DOI:
10.1016/j.cub.2012.12.013
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发表时间:
2013
期刊:
影响因子:
9.2
通讯作者:
J. Großhans
中科院分区:
文献类型:
--
作者:
H.-W. Sung;S. Spangenberg;N. Vogt;J. Großhans
The cell number of the earlyDrosophilaembryo is determined by exactly 13 rounds of synchronous nuclear divisions, allowing cellularization and formation of the embryonic epithelium [1]. The pause in G2 in cycle 14 is controlled by multiple pathways, such as activation of DNA repair checkpoint, progression through S phase, and inhibitory phosphorylation of Cdk1, involving the genesgrapes,mei41, andwee1[2–8]. In addition, degradation of maternal RNAs [9] and zygotic gene expression [10, 11] are involved. The zinc finger Vielfältig (Vfl) controls expression of many early zygotic genes [12, 13], including the mitotic inhibitorfrühstart[14, 15]. The functional relationship of these pathways and the mechanism for triggering the cell-cycle pause have remained unclear. Here, we show that a novel single-nucleotide mutation in the 3′ UTR of theRNPII215gene leads to a reduced number of nuclear divisions that is accompanied by premature transcription of early zygotic genes and cellularization. The reduced number of nuclear divisions in mutant embryos depends on the transcription factor Vfl and on zygotic gene expression, but not ongrapes, the mitotic inhibitor Frühstart, and the nucleocytoplasmic ratio. We propose that activation of zygotic gene expression is the trigger that determines the timely and concerted cell-cycle pause and cellularization.
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影响因子:
4.6
作者:
Nina Vogt;Iris Koch;H. Schwarz;F. Schnorrer;C. Nüsslein
通讯作者:
C. Nüsslein
影响因子:
3.3
作者:
G. Yasuda;G. Schubiger;B. Wakimoto
通讯作者:
B. Wakimoto
影响因子:
9.8
作者:
De Renzis S;Elemento O;Tavazoie S;Wieschaus EF
通讯作者:
Wieschaus EF
DOI:
10.1242/dev.104.3.495
发表时间:
1988
期刊:
Development (Cambridge, England)
影响因子:
--
作者:
Merrill,PT;Sweeton,D;Wieschaus,E
通讯作者:
Wieschaus,E
影响因子:
11.8
作者:
Tadros, Wael;Goldman, Aaron L.;Lipshitz, Howard D.
通讯作者:
Lipshitz, Howard D.