関連する実験動画
Updated: Jun 18, 2026
08:48
Targeted in Situ Mutagenesis of Histone Genes in Budding Yeast
Published on: January 26, 2017
HOP1遺伝子は,酵母染色体のメオシス特有の成分をコードする
N M Hollingsworth1, L Goetsch, B Byers
1Department of Genetics, University of Washington, Seattle 98195.
Cell
|April 6, 1990
まとめ
HOP1遺伝子は,酵母中性染色体ペアリングとシナプトネマル複合体の形成に不可欠です. 亜鉛指のモチーフを含むそのタンパク質は,中性染色体に局所化し,シナプス中のDNA相互作用の役割を示唆しています.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 細胞生物学 細胞生物学
背景:
- Saccharomyces cerevisiae の HOP1 遺伝子は,中性染色体ペアリングに不可欠である.
- HOP1の欠陥は,シナプトネマル複合体の形成に失敗し,ミオシス中の染色体間の不適切な交差につながります.
研究 の 目的:
- 胞子形成中のHOP1遺伝子の転写調節を調査する.
- 中性染色体内のHOP1タンパク質の局所を決定する.
- HOP1タンパク質活性におけるCys2/Cys2亜鉛指モチーフの機能的役割を明らかにする.
主な方法:
- スポルレーション中のHOP1遺伝子転写の分析.
- 中性染色体におけるHOP1タンパク質の免疫局所化.
- HOP1遺伝子内の亜鉛指モチーフのサイト指向型変異.
主要な成果:
- HOP1遺伝子の発現は,酵母菌の胞子形成中に転写的に調節される.
- HOP1タンパク質は,中性染色体の全長に定着しています.
- Cys2/Cys2亜鉛指モチーフ (Cys to Ser) の突然変異は,hop1現象型を再現する.
結論:
- HOP1は,染色体シナプスに関与する可能性が高い中性染色体の成分をコードします.
- 亜鉛指のモチーフは,HOP1タンパク質がDNAと直接相互作用する可能性があることを示唆しています.
- HOP1は潜在的にシナプトネマ複合体の構成要素であり,適切な中間的進行に不可欠です.
関連する概念動画
01:49Meiosis I
Meiosis is a carefully orchestrated set of cell divisions, the goal of which—in humans—is to produce haploid sperm or eggs, each containing half the number of chromosomes present in somatic cells elsewhere in the body. Meiosis I is the first such division, and involves several key steps, among them: condensation of replicated chromosomes in diploid cells; the pairing of homologous chromosomes and their exchange of information; and finally, the separation of homologous chromosomes by a...
01:57Meiosis II
Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each containing...
03:09Meiosis I
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...
02:02Meiosis II
Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
03:09Meiosis I
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...
02:02Meiosis II
Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...