控制Drosophila的身体模式由巴形态基因梯度由巴形态基因梯度
G Struhl1, P Johnston, P A Lawrence
1Howard Hughes Medical Institute, Department of Genetics and Development, Columbia University College of Physicians and Surgeons, New York, New York 10032.
Cell
|April 17, 1992
概括
在Drosophila胚胎发生过程中,驼背蛋白梯度起到形态生成的作用. 它的度值独立调节下游缺口基因,指定胸部和腹部部分.
科学领域:
- 发育生物学 发展生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 早期的Drosophila胚胎发生包括指定胸部和腹部部分.
- 差距基因,包括巴 (hb),克鲁佩尔,克尼尔普斯和巨人,起着至关重要的作用.
- 孕产妇的决定因素是双体和纳米体控制驼背的表达.
研究的目的:
- 为了研究背动物蛋白质梯度在调节下游缺口基因中的作用.
- 为了确定驼背的蛋白质是否在Drosophila细分中充当形态原体.
主要方法:
- 在Drosophila胚胎发生过程中分析基因表达模式.
- 调查母亲决定因素和差距基因之间的调控相互作用.
- 评估背动物蛋白质度对克鲁佩尔,旋转和巨型表情的影响.
主要成果:
- 驼背 (hb) 蛋白质的梯度是由bicoid和nanos.建立的.
- 这种hb蛋白梯度决定了克鲁佩尔,Knirps和巨型基因的表达域.
- 每个下游缺口基因都对hb蛋白的不同度值作出反应.
结论:
- 驼背蛋白在Drosophila细分中充当经典的形态原体.
- 它的分级分布提供了度依赖的位置信息.
- 这种机制确保胸部和腹部部分的精确规格.
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