相关实验视频
Updated: May 20, 2025

07:08
The Lambda Select cII Mutation Detection System
Published on: April 26, 2018
7.8K
在RcMYB114中发生的突变会影响中的安托西亚宁糖化物积累
Maofu Li1,2,3, Yuan Yang1,2,4, Hua Wang1,2,3
1Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China.
Biology
|March 26, 2025
概括
在RcMYB114基因中发生的两个非同名突变影响了素的积累,决定了花的颜色. 这些RcMYB114基因变异与RcbHLH和RcWD40相互作用,调节色素的产生.
科学领域:
- 植物分子生物学 植物分子生物学
- 遗传学 遗传学 是一个
- 生物化学 生物化学
背景情况:
- R2R3-MYB转录因子对于植物发育至关重要.
- MBW (MYB-bHLH-WD40) 复合体调节了氨酸的积累,影响了花的颜色.
- RcMYB114,RcbHLH和RcWD40是花颜色决定的关键组成部分.
研究的目的:
- 为了研究RcMYB114基因变异在花叶颜色中的作用.
- 了解由 RcMYB114.4 调节的安托西亚宁积累的分子机制.
- 分析非同义替换对RcMYB114功能的影响.
主要方法:
- 在红色和白色中对RcMYB114进行比较基因组分析.
- 在不同花发育阶段对安托西亚宁含量进行量化.
- 对RcMYB114.4的时空表达分析.
- 酵母二杂交试验用于研究蛋白质相互作用.
- 在烟草中进行过渡转化实验.
主要成果:
- 确定了RcMYB114中的两个非同义替代物 (红色的RcMYB114a,白色的RcMYB114b),改变了116和195位的氨基酸.
- RcMYB114及其误解突变 (RcMYB114b,RcMYB114c,RcMYB114d) 与RcbHLH和RcWD40相互作用.
- 这些相互作用促进了烟草叶中的安托西亚宁积累和红色染色.
- 虽然这些突变不会取消基因功能,但它们会导致差异性安东素积累.
结论:
- 在RcMYB114中发现的非同义突变与安托西亚宁含量和花颜色的变化有关.
- RcMYB114,RcbHLH和RcWD40形成一个复合体,调节氨酸生物合成.
- 这项研究提供了对花色彩的遗传基础的见解,并为未来的研究提供了参考资料.
相关概念视频
Mutations
77.8K
Overview
77.8K
Mismatch Repair
4.7K
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
4.7K
Cancers Originate from Somatic Mutations in a Single Cell
11.4K
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
11.4K
Loss of Tumor Suppressor Gene Functions
4.7K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
4.7K
Genome Copying Errors
4.1K
DNA replication is a well-evolved process that copies millions of base pairs with high fidelity during each cell division. Occasionally a wrong base or a long stretch of wrong bases may get added to the daughter strands. If the errors are left unchecked, cells might accumulate several mutations that might endanger their survival. Therefore, the copying errors are checked and repaired at three levels.
4.1K
Viral Mutations
32.1K
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
32.1K

