开拓因素:自然还是培养?
Shane Stoeber1,2, Holly Godin1,2, Cheng Xu1,2
1Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA, USA.
概括
先驱因子 (PFs) 是转录因子,它们打开紧的染色质以调节基因. 本次审查探讨了PF是否具有独特的活动,或者所有转录因子 (TF) 在某些条件下是否可以成为先驱.
科学领域:
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 基因规则 基因规则
背景情况:
- 染色质结构,密集的核体,限制了蛋白质的访问.
- 先驱因子 (PFs) 是特定序列的转录因子 (TFs),它们与核细胞体内嵌入的基因结合.
- PFs启动染色体开放,这对基因调节和细胞分化至关重要.
研究的目的:
- 审查当前关于开拓因素 (PF) 是否具有独特的内在活动的辩论.
- 探索所有转录因子 (TF) 在特定细胞环境中都能表现出开拓性活动的替代观点.
- 讨论开拓活动的定义特征,并调和不同的观点.
主要方法:
- 对先驱因子和转录因子现有研究的文献综述.
- 对支持内在与上下文依赖的开拓性活动的证据分析.
- 讨论影响先驱因素功能的因素.
主要成果:
- 有证据表明,关于先驱因素 (PF) 的独特性质存在争论.
- 另一种观点认为,所有转录因子 (TF) 都可能具有开创性潜力.
- 正在讨论定义开拓活动的关键特征.
结论:
- 先驱因子 (PF) 功能可能不仅限于转录因子 (TF) 的独特子集.
- 固有的特性 (例如,核细胞结合) 和细胞条件 (例如,辅助因子的可用性) 都可能有助于开拓性活动.
- 调和内在和外在因素是理解基因调节中的开创性因素作用的关键.
相关概念视频
01:10Nature and Nurture
20.5K
Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience,...
20.5K
01:15Natural Selection and Adaptation
201
Natural selection, a fundamental concept in evolutionary biology, is the mechanism by which evolution is driven, favoring organisms that are best adapted to their environments. This process enhances their chances of survival and reproduction. Adaptation, a key outcome of this process, involves genetic modifications that optimize an organism's functionality under specific environmental challenges, such as extreme cold or thinner air at high altitudes.
Beyond physical adaptations,...
Beyond physical adaptations,...
201
01:23Behavioral Genetics and Its Designs
353
Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
353
01:30Biological Influences on Intelligence
93
Intelligence is often thought to be linked to brain size, but the relationship is more complex than that. While brain size does correlate modestly with some abilities, like verbal skills, the connection is weaker for others, such as spatial reasoning. Other factors, like brain structure, also play crucial roles. For instance, despite Einstein's smaller-than-average brain, his parietal cortex, which is involved in spatial reasoning, was 15% wider, suggesting that neural density might matter...
93
01:20Gene-Environment Interactions
293
Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
293
01:21The Nativist Approach
44
The nativist approach to infant cognitive development proposes that infants are born with inherent knowledge structures that allow them to interpret the world almost immediately. This perspective contrasts with earlier developmental theories, such as those proposed by Jean Piaget, which emphasized a more gradual acquisition of cognitive abilities through interaction with the environment. One key concept in this approach is object permanence — the understanding that objects continue to...
44