関連する実験動画
Updated: Aug 17, 2025

10:00
RiboTag Immunoprecipitation in the Germ Cells of the Male Mouse
Published on: March 4, 2020
11.1K
男性 の 胚 細胞 に 特定 さ れ た リボソーム が 男性 の 産力 を 制御 する
Huiling Li1, Yangao Huo2,3, Xi He1
1State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, China.
Nature
|December 14, 2022
まとめ
研究者達は 精子リボソーム (RibosomeST) を発見しました 男性の生殖能力に不可欠なものです このユニークなリボソームは精子形成の際に適切なタンパク質の折り畳みを確保し,哺乳類における新しい組織特異的な転移調節を強調しています.
科学分野:
- 分子生物学
- 細胞生物学
- 生殖生物学
背景:
- リボソームは異質性を示し,タンパク質合成の調節に影響する.
- 男性の生殖細胞の発達は,精子形成の過程で複雑な変換制御に依存しています.
研究 の 目的:
- 精子形成中に特定のリボソーム型がトランスレーションに関与するかどうかを調べる.
- 新しい精子固有のリボソームの構造と機能を特徴付ける.
主な方法:
- マウスの腎臓と丸からのリボソームの比較単粒子の冷凍電子顕微鏡.
- ネズミの精子固有のリボソームの遺伝的削除
- タンパク質の折りたたみ制御の分析
主要な成果:
- 男性生殖細胞に特異なRPL39Lを組み立てたリボソームSTの識別
- マウスにおけるリボソームSTの削除は精子形成の欠陥と生育能力の低下をもたらした.
- リボソームSTは,リボソームコアと比較して独特の新生ポリペプチド出口トンネルを持っています.
- リボソームSTは重要な精子形成タンパク質の折りたたみを コトランスレーションで調節する.
- リボソームコアはリボソームSTの特化した機能を置き換えることはできません.
結論:
- 精子に特有のリボソームであるリボソームSTは 男性の生殖能力に 重要な役割を果たします
- リボソームSTの独特の構造は,精子形成中に特定のタンパク質の折り畳みを調節することを可能にします.
- この発見はリボソームの多様性や 組織特異的なトランスレーション制御の理解を広げています
関連する概念動画
The Y Chromosome Determines Maleness
6.7K
The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....
6.7K
Infertility in Males
314
Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
314
Spermatogenesis
102.9K
Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male...
102.9K
The Ratio of X Chromosome to Autosomes
8.7K
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
8.7K
X and Y Chromosomes
26.5K
Among mammals, the gender of an organism is determined by the sex chromosomes. Humans have two sex chromosomes, X and Y. Every human diploid cell has 22 pairs of autosomes and one pair of sex chromosomes. A human female has two X chromosomes, while a male has one X chromosome and one Y chromosome.
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
26.5K
Sex-linked Disorders
102.6K
Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
102.6K

