吸引者比它们的盆地不那么稳定:通道化在基因调节网络中造成了连贯性差距
Venkata Sai Narayana Bavisetty1, Matthew Wheeler2, Claus Kadelka3
1Department of Integrative Biology and Physiology, University of California, Los Angeles, CA, 90095, United States.
由于通道化,细胞分化是强大的,这稳定了发育,但使成熟细胞状态不那么稳定,允许可塑性. 这修改了瓦丁顿的表观遗传景观模型.
科学领域:
- 系统生物学 系统生物学
- 发育生物学 发展生物学
- 计算生物学 计算生物学
背景情况:
- 沃丁顿的表观遗传景观比喻模型细胞分化.
- 布尔网络正规化了基因调节动态和景观.
- 传统的稳定性测量不充分评估吸引力强度.
研究的目的:
- 正式化和分析吸引因子连贯性,以稳定细胞表型.
- 研究吸引力和发展轨迹之间的稳定性悖论.
- 了解道化在生物强度和可塑性中的作用.
主要方法:
- 分析了122个由专家策划的生物布尔模型.
- 进行了随机基因调节网络的大规模模拟.
- 量化吸引力的一致性和网络偏差.
主要成果:
- 成熟细胞的吸引因子比发育轨迹不那么稳定.
- 存在一个连贯性差距,吸引因素靠近盆地边界.
- 管道化在确保发展稳健的同时,也造成了这种差距.
- 网络偏差强烈地预测了连贯性差距的大小 (
结论:
- 管道化创造了强大的发展,并允许表型的可塑性.
- 结果修改了瓦丁顿的景观,解释了双重的坚固性和可塑性.
- 对理解发育,疾病和合成生物学电路的含义.
更多相关视频
10:30The C. elegans Excretory Canal as a Model for Intracellular Lumen Morphogenesis and In Vivo Polarized Membrane Biogenesis in a Single Cell: labeling by GFP-fusions, RNAi Interaction Screen and Imaging
Published on: October 3, 2017
10:40Assessment of Dictyostelium discoideum Response to Acute Mechanical Stimulation
Published on: November 9, 2017
相关概念视频
Cooperative Binding of Transcription Regulators
Cooperative Binding of Transcription Regulators
Cis-regulatory Sequences
Operon Model
Conserved Binding Sites
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Chromatin Position Affects Gene Expression
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
