MIWI N-终端阿尔金宁调节功能性帕奇pRNAs的生成和精子发生
Nicholas Vrettos1, Jan Oppelt1, Ansgar Zoch2,3,4
1Department of Pathology and Laboratory Medicine, Division of Neuropathology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
Nucleic acids research
|March 23, 2024
概括
PIWI蛋白的N端阿尔金因 (NTR) 甲基化对于小鼠的雄性生育至关重要. 这个过程通过影响piRNA放大和染色体体结构来调节转子体,基因表达和精子形成.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
- 生殖生物学 生殖生物学
背景情况:
- N端氨酸 (NTR) 甲基化是PIWI蛋白的保守修饰,对于PIWI相互作用RNA (piRNA) 途径至关重要.
- 在哺乳动物繁殖中PIWI NTR甲基化的特定作用尚未完全理解.
- PIWI蛋白与Tudor域含蛋白 (TDRDs) 相互作用,参与piRNA生物发生和染色体的形成.
研究的目的:
- 在精子生成过程中,研究PIWI蛋白,特别是小鼠MIWI (PIWIL1) 中N端氨酸 (NTR) 甲基化的功能.
- 阐明MIWI-NTR与TDRD相互作用在piRNA放大,转子子控制和男性生育能力中的作用.
主要方法:
- 使用小鼠模型研究MIWI (PIWIL1) 功能.
- 研究了MIWI-NTRs和TDRD蛋白之间的相互作用 (TDRD5,TDRKH,TDRD6).
- 分析了piRNA放大,转子子调节,基因表达和染色体体的形成.
主要成果:
- MIWI-NTRs对于精子生成至关重要,调节转子和基因表达.
- 与MIWI相互作用的TDRD5和TDRKH的干扰减弱了piRNA放大.
- piRNA放大对于转子子控制和维持精子生成必不可少的特定包基piRNA至关重要.
- MIWI-NTRs调解TDRD6相互作用以进行染色体缩,并稳定精子生成转录以进行核缩.
结论:
- N端氨酸 (NTR) 甲基化使MIWI蛋白功能多样化,在精子生成中发挥关键作用.
- 由MIWI-NTRs驱动的piRNA放大,是通过转子子沉默和基本基因表达的调节来维持男性生育的必要条件.
- 该研究强调了PIWI蛋白质修饰在生殖过程和基因组稳定性中的重要性.
相关概念视频
piRNA - Piwi-interacting RNAs
6.9K
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
6.9K
RNA Interference
26.0K
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
26.0K
Conservation of Protein Domains Over Different Proteins
10.8K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
10.8K
siRNA - Small Interfering RNAs
16.8K
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
16.8K
Experimental RNAi
6.1K
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
6.1K
Meiosis I
40.6K
Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
40.6K


