通过TUT4/7的尿化限制了人类LINE-1s的逆转换
Zbigniew Warkocki1, Paweł S Krawczyk2, Dorota Adamska2
1Laboratory of RNA Biology and Functional Genomics, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawinskiego 5a, 02-106 Warsaw, Poland.
Cell
|August 21, 2018
概括
通过向LINE-1mRNA添加尿素来控制LINE-1的逆转换. 这种由 TUT4 和 TUT7 酶引起的尿基化限制了 LINE-1 的活性,从而保持了基因组的稳定性.
科学领域:
- 分子生物学
- 遗传学
- 表观遗传学
背景情况:
- LINE-1逆转换是基因组进化和不稳定的关键驱动因素.
- 表观遗传机制是LINE-1活动的众所周知的调节者.
- 对于LINE-1的转录后调节的理解仍然较少.
研究的目的:
- 研究mRNA修饰在LINE-1逆转换控制中的作用.
- 确定参与LINE-1mRNA调节的特定酶和机制.
- 阐明LINE-1逆转换如何在转录后的水平上受到限制.
主要方法:
- 在人类细胞系和小鼠丸中分析LINE-1mRNA尿.
- 研究尿转移酶TUT4和TUT7的功能.
- 研究尿基转移酶,MOV10和L1-ORF1p之间的相互作用.
- 检查尿化机制的亚细胞局部.
主要成果:
- 在人类细胞和小鼠丸中,LINE-1信使RNA (mRNA) 经历了普遍的3'端尿解.
- 尿基转化由TUT4和TUT7尿基转移酶催化,它们与MOV10一起作用.
- 尿化通过多层机制有效地限制LINE-1的逆转换.
- TUT4和TUT7的不同细胞下定位决定了不同的调节功能.
结论:
- TUT4/ 7介导的尿化是LINE-1的一个关键的转录后调节机制.
- 通过TUT7的细胞质尿基化抑制了逆转录的启动.
- 通过细胞质丰富的TUT4进行尿化会破坏LINE-1mRNA的稳定.
- 这种途径通过控制LINE-1元素来维持基因组的稳定性.
相关概念视频
Restriction Enzymes
36.2K
Restriction enzymes are bacterial enzymes used to cut DNA in a sequence-specific manner. To cleave DNA, they bind to specific palindromic sequences called restriction sites. Such palindromic DNA sequences or inverted repeats are commonly found in regions of functional significance, such as the origin of replication, gene operator sites, and regions containing transcription termination signals.
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...
36.2K
Cardiomyopathy IV: Restrictive Cardiomyopathy
558
Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
558
Hepatic Drug Clearance: Restrictive and Nonrestrictive Clearance
527
Hepatic clearance refers to the volume of blood cleared of a drug by the liver per unit of time. It plays a crucial role in drug metabolism and elimination. While hepatic clearance is commonly estimated by subtracting renal clearance from total body clearance, other pathways, such as pulmonary or biliary clearance, may also contribute. However, these pathways are generally less significant than hepatic and renal clearance.
Most drugs undergo restrictive clearance, which is proportional to the...
Most drugs undergo restrictive clearance, which is proportional to the...
527
Biodiversity and Human Values
17.1K
Human civilization relies on biodiversity in many ways. Sudden changes in species biodiversity result in environmental changes that can modify weather patterns and therefore human civilizations.
17.1K
Human Genetics
1.6K
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...
1.6K
Requirements for Human Life
13.9K
The Earth and its atmosphere have provided humans with air, water, and food, but these are not the only requirements for survival. Humans also require a specific range of temperature and pressure that the Earth and its atmosphere provides.
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
13.9K


