プラズモジアの血液段階の発達には,クロマチンリモデラーSnf2Lが必要である
Maria Theresia Watzlowik1, Elisabeth Silberhorn1, Sujaan Das2
1Regensburg Center for Biochemistry (RCB), University of Regensburg, Regensburg, Germany.
Nature
|February 19, 2025
まとめ
研究者らは,マラリア寄生虫の遺伝子発現と発達を調節する重要なタンパク質であるPlasmodium falciparum Snf2L (PfSnf2L) を特定した. PfSnf2Lを標的とする阻害剤は寄生虫を殺し,マラリアの伝播を阻害します.
科学分野:
- マラリア
- エピジェネティクス
- 寄生虫 生物学
背景:
- マラリアの寄生虫であるプラズモディアム・ファルシパラムは 遺伝子の発現を制御する複雑なライフサイクルを持っています
- エピジェネティックの変化とクロマチンの構造は 寄生虫の発達を制御する上で重要な役割を果たします
- プラズモディウム・ファルシパラムのクロマチンは高AT含有量と異なったヒストンの特異性があり,そのリモデラーはほとんど研究されていない.
研究 の 目的:
- プラズモディウム・ファルシパラムの染色体リモデラーを特定し特徴づけること
- 寄生虫の遺伝子発現と発達における これらのリモデラーの役割を理解する.
- 抗マラリア薬の潜在的標的を特定する.
主な方法:
- P. falciparum Snf2L (PfSnf2L) をISWIに関連するATPアゼとして識別する.
- インビトロ核細胞再定位検査
- 寄生虫の発達と分化におけるPfSnf2Lの重要性の評価
- PfSnf2L阻害剤の開発と試験
主要な成果:
- PfSnf2Lはプラズモディアム・ファルシパラムの核細胞を活性的に再配置する.
- PfSnf2Lは無性発育と性差別化に不可欠である.
- PfSnf2Lは,プロモーターの核粒子の位置を調節することによって,段階特有の遺伝子転写を制御する.
- PfSnf2Lを標的とする特定の阻害剤は寄生虫を殺し,ゲメトサイト形成を阻害し,伝播阻害の可能性を示しています.
結論:
- PfSnf2Lは,Plasmodium falciparumの遺伝子発現のタイミングと発達の重要なレギュラーである.
- PfSnf2Lを阻害剤で標的にすることは,抗マラリア薬の開発のための新しい戦略を提供します.
- 特定された阻害剤は,伝播を阻害する抗マラリア薬の新種を表しています.
関連する概念動画
Chromatin Modification in iPS Cells
1.6K
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...
1.6K
Nucleosome Remodeling
8.9K
Nucleosomes are the basic units of chromatin compaction. Each nucleosome consists of the DNA bound tightly around a histone core, which makes the DNA inaccessible to DNA binding proteins such as DNA polymerase and RNA polymerase. Hence, the fundamental problem is to ensure access to DNA when appropriate, despite the compact and protective chromatin structure.
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
8.9K
Symbiosis
27.3K
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
27.3K
Spreading of Chromatin Modifications
8.2K
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...
8.2K
Polytene Chromosomes
9.9K
Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also...
9.9K
Inheritance of Chromatin Structures
6.2K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.2K


