在Leishmania braziliensis的基因组转化后的修改
Rafael Fogaça de Almeida1, Matheus Fernandes1, Fabiano Borges Figueiredo2
1Laboratório de Biologia Molecular e Sistêmica de Tripanossomatídeos, Instituto Carlos Chagas, Fundação Oswaldo Cruz, Curitiba, Parana, Brazil.
Scientific data
|December 3, 2025
概括
基因组转化后修饰 (hPTMs) 对于基因调节至关重要. 这项研究绘制了Leishmania寄生虫中的hPTM,揭示了各种修饰,并有助于未来研究传染病中的染色体调节.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 寄生虫学的寄生虫学
- 分子生物学分子生物学
背景情况:
- 基因组转化后修饰 (hPTMs) 是真核生物中基因表达的关键表观遗传调节者.
- 虽然在Trypanosoma brucei和Trypanosoma cruzi中已知hPTM,但对导致莱什曼病的莱什曼寄生虫的数据有限.
- 试类动物的基因调节主要发生在转录后,但hPTMs可能发挥调节作用.
研究的目的:
- 为了生成第一个大规模的,高可靠性地图的hPTMs在Leishmania braziliensis.
- 为了研究莱什马尼亚菌中基因组修饰的分布和多样性.
- 为了解Leishmania和相关的试类动物中的染色质调节提供资源.
主要方法:
- 使用了基于质谱的优化蛋白质组工作流.
- 进行了对基因素翻译后修饰的大规模分析.
- 专注于Leishmania braziliensis作为模型生物体.
主要成果:
- 介绍了Leishmania braziliensis中hPTM的第一个全面地图.
- 揭示了各种基因组修饰的广泛分布.
- 在hPTM模式中与T. cruzi和其他真核生物有相似之处.
结论:
- 建立了一个有价值的数据集,用于未来对莱什马尼亚染色体调节的功能研究.
- 突出了hPTMs在Leishmania寄生虫中的潜在调节作用.
- 为了解医学上重要的类虫的表观遗传机制做出了贡献.
相关概念视频
02:32Histone Modification
15.8K
The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
15.8K
02:32Histone Modification
4.3K
4.3K
02:25Spreading of Chromatin Modifications
9.3K
The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer...
Writers
The writer...
9.3K
02:30Histone Variants at the Centromere
4.9K
Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...
4.9K
02:04Covalently Linked Protein Regulators
8.6K
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....
These groups modify specific amino acids in a protein....
8.6K
01:32Chromatin Modification in iPS Cells
2.1K
Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
2.1K