概括
两种中国仓鼠卵巢 (CHO) 细胞突变,LEC11和LEC12,表达小鼠胚胎抗原SSEA-1,这是由于调控突变影响fucosyltransferase基因. 这些突变体表现出独特的酶活动,这些酶活动不在父细胞或复原体中存在.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 遗传学 是一个遗传学.
背景情况:
- 中国仓鼠卵巢 (CHO) 细胞是生物研究中常见的模型系统.
- 小鼠胚胎抗原SSEA-1是关键的发育标记物.
- 了解细胞系中的突变有助于破译基因调节.
研究的目的:
- 研究CHO细胞突变体中SSEA-1表达的分子基础.
- 为了确定与SSEA-1表达相关的特定酶活性.
- 为了探索fucosyltransferase基因的遗传调节.
主要方法:
- 使用单克隆抗体的放射性免疫试验来检测SSEA-1.
- 在细胞提取物中分析了N-乙烯基葡萄糖胺胺基α ((1,3)) 核糖酶转移酶活性.
- 突变细胞和亲细胞之间的酶基质特异性和产物比较.
主要成果:
- LEC11和LEC12 CHO细胞突变体表达SSEA-1抗原.
- 父母CHO细胞和复原剂 (LEC11.R9,LEC12.R10) 不表达SSEA-1.
- SSEA-1的表达与特定的N-乙糖氨基胺基αα ((1,3) fucosyltransferases的de novo活性相关.
- 观察到酶基质特异性和产品的差异.
结论:
- LEC11和LEC12突变可能是由调控突变引起的.
- 这些突变会影响不同的fucosyltransferase基因.
- 这项研究提供了对CHO细胞中SSEA-1表达和fucosylation的遗传控制的见解.
更多相关视频
09:32Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
Published on: June 15, 2017
09:14Single-Cell RNA Sequencing of Mutant Whole Mouse Embryos: From the Epiblast to the End of Gastrulation
Published on: June 14, 2024
相关概念视频
In-vitro Mutagenesis
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
Determination
During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
Cis-regulatory Sequences
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
Master Transcription Regulators
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...
