平衡参与MSL2在不平衡基因组中的基因表达调节
Ruixue Wang1, Shuai Zhang1, Haizhu Qi1
1Key Laboratory of Cell Proliferation and Regulatory Biology, Ministry of Education, College of Life Sciences, Beijing Normal University, Beijing 100875, China.
Cells
|November 27, 2024
概括
在阳体Drosophila中,雄性特异性致死性2 (MSL2) 的宫外表达使基因表达正常化,并通过调节ER Ca2+稳态来改善生存率. 这一发现为管理基因组失衡效应提供了洞察力.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 分子生物学分子生物学
背景情况:
- 积体,或基因组不平衡,对生物体是有害的.
- 父母形状瘤对后代基因表达的影响在动物中尚不清楚.
研究的目的:
- 为了研究Drosophila后代中形状的分子调节机制.
- 为了探索男性特异性致死性2 (MSL2) 在调节无体个体的基因表达中的作用.
主要方法:
- 进行了互交交叉,以从基因组不平衡的父母那里生成无体Drosophila后代.
- 分析了基因表达模式,重点关注MSL2及其标.
- 研究了ERp60的功能,一个MSL2向基因,与内质网膜 (ER) Ca2+稳态和STIM1相互作用相关.
主要成果:
- 异卵性MSL2表达在无卵性后代导致基因表达模式类似于双卵性,包括MSL2目标,母体,线粒体和可转移元素基因.
- 过度表达ERp60,一个关键的MSL2标,增强了ER Ca2+水平,并改善了状雌性的存活率.
- 在型个体的大脑中观察到升高的ER Ca2+水平.
结论:
- MSL2在形多虫的基因表达正常化方面发挥着重要作用.
- 通过ERp60调节ER Ca2+稳态,这对于无体雌性动物的生存至关重要.
- (Ca2+) 稳态可能是MSL2介导的基因组内MSL2调节的一个关键因素.
相关概念视频
02:30Genomic Imprinting and Inheritance
33.3K
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
33.3K
01:37Epigenetic Regulation
3.0K
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
3.0K
01:16Calmodulin-dependent Signaling
5.1K
Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
5.1K
02:23Master Transcription Regulators
6.9K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
6.9K
02:50Dosage Compensation
6.1K
In animals, gender is determined by the number and type of sex chromosome. For example, human females have two X chromosomes, and males have one X and one Y chromosome, whereas C.elegans with one X chromosome is a male, and the one with two X chromosomes is a hermaphrodite.
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will...
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will...
6.1K
01:27Feedback Regulation of Calcium Concentration
3.3K
Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
3.3K